Maria J. Pons

Scopus Publications

Antibiotic Resistance and Virulence Genes in Escherichia coli from Wild Birds in a Peruvian Wetland
Kathya Espinoza, Xiomara Caffo, Jacqueline Hernández, Luciano A. Palomino-Kobayashi, Joaquim Ruiz, Maria J. Pons
Ecohealth, 2026
Assessment of specific cell-mediated immunity to SARS-CoV-2: techniques for its measurement
Javier Enciso-Benavides, Marlon Garcia-Paita, Santiago Alvarez-Vega, Salyoc Tapia-Rojas, Ana Mayanga-Herrera, Maria J. Pons
Revista Del Cuerpo Medico Hospital Nacional Almanzor Aguinaga Asenjo, 2025
Comprender la respuesta inmunitaria frente a la infección o vacunación contra SARS-CoV-2 se ha convertido en un objetivo clave para entender la enfermedad, su progresión, y protección frente a futuras infecciones o posibles nuevas variantes que puedan surgir del virus. El objetivo de la presente revisión es destacar la relevancia de la respuesta inmunológica celular y resumir las diferentes metodologías descritas para el estudio de esta respuesta mediada por células T, de memoria, tanto tras la exposición al virus como de la vacunación frente al SARS-CoV-2. Para ello, se incluyen los ensayos de proliferación celular (CFSE, 3H- timidina), métodos de tipificación celular (citometría de flujo), los ensayos inmunológicos basados en la medición de citocinas (ELISA, ELISPOT, Multiplexado en suspensión) y el análisis de genes relacionados con la inmunidad celular mediante técnicas moleculares (RT-qPCR o qPCR y secuenciación).
Highly clonal carbapenem-resistant Acinetobacter baumannii isolates from a Peruvian hospital
Maria J. Pons, Fernando Guibert, Jorge Choque-Matos, Luciano A. Palomino-Kobayashi, Paul Fernandez-Castro, Patricia Gonzales, Carmen Valera-Krumdieck, Nidia Vilar, Carla Andrea Alonso, María López, Beatriz Rojo-Bezares, Yolanda Sáenz, Joaquim Ruiz
Microbiology Spectrum, 2025
Acinetobacter baumannii is an opportunistic pathogen of great clinical concern, showing high levels of resistance to several antimicrobials, including carbapenems. This study aimed to characterize carbapenem-resistant A. baumannii recovered from a tertiary care hospital (Lima, Peru) in January–February 2021 (during the coronavirus disease 2019 pandemic). Antimicrobial susceptibility was determined by VITEK-2, and the presence of carbapenem-resistance genes by PCR. All 40 A . baumannii isolates were extensively drug-resistant, showing full resistance to all antibiotics tested except ampicillin/sulbactam (95% of resistance) and colistin (10%). The bla OXA-24-like gene was detected in 90% of isolates, and the remaining 10% isolates harbored the bla OXA-23-like gene. Pulsed-field gel electrophoresis classified isolates into three different pulsotypes, grouping 8, 2, and 30 isolates, respectively. Additionally, whole-genome sequencing of two isolates of the main pulsotype revealed that they belonged to ST2 and ST2724 (international clone II) and harbored the bla TEM-1 , bla OXA-66 , bla OXA-72 , and bla ADC-30 β-lactamase genes; mutations in gyrA and parC , aminoglycoside, tetracycline, and sulfonamide resistance genes; and a class 1 integron (In439) containing aac(6′)-Ib′ , catB8 , and aadA1 located inside the AbGRI3 genomic resistance island. These findings highlight the presence of highly resistant and clonally related ST2 of A. baumannii and their relationship with genomes of ST2 of South America. IMPORTANCE Acinetobacter baumannii is a critical pathogen known for causing severe infections in hospitalized patients and for its remarkable ability to develop resistance to multiple antibiotics, including last-line treatments such as carbapenems. In Latin America, data on the genetic background and spread of these resistant strains remain limited. Our study provides a detailed molecular and genomic characterization of extensively drug-resistant A. baumannii isolates collected from a Peruvian hospital during the coronavirus disease 2019 pandemic. We identified a predominant clone belonging to international clone II, which carried multiple resistance genes and a complex resistance island. These findings raise public health concerns, as they highlight the silent spread of high-risk clones in regions with limited surveillance capacity. By contributing valuable local genomic data, our study supports global efforts to track antimicrobial resistance and underscores the urgent need to strengthen molecular monitoring of hospital-associated pathogens also in low- and middle-income countries.
In vitro sulbactam/avibactam synergy against carbapenem-resistant Acinetobacter baumannii from hospitals in Peru
Rosario Huerto-Huánuco, Yaneth Quispe-Hualpa, Carla Andrea Alonso, Rosario Oporto-Llerena, Gabriela Soza, Zulema Surichaqui-Cerrón, Carmen Valera-Krumdieck, Luis Castañeda, Maria J Pons, Yolanda Sáenz, Joaquim Ruiz, , Angie K Castillo, Maria Ramos-Chirinos, Jesus Rojas-Jaimes, Delza Tarraga Gonzales, Elsa Nuñez Infanzón, Patricia Gonzales, Luis Pollack, Katherine Alcedo, William Villegas Quispe, Gina Salvador-Luján, Edwin Cuaresma, Nestor Luque, Martín Casapia, Juan C Celis, Alexander Briones, Kovy Arteaga-Livias, María López, Beatriz Rojo-Bezares, Paula Toledano, Andrea C Gomez, Alejandra Zevallos, Joseph Pinto, Kathiuska Z Tutaya, Mignorys V Salcedo
Jac Antimicrobial Resistance, 2025
Objectives To evaluate the synergistic activity of ampicillin/sulbactam plus ceftazidime/avibactam in a collection of carbapenem-resistant Acinetobacter baumannii (CR-Ab) from different regions in Peru. Materials and methods One hundred and eighty-four CR-Ab isolates were included in this study. They were identified by amplification of blaOXA-51 and confirmed by MALDI-TOF (matrix-assisted laser desorption ionization time of flight) mass spectrometry and 16S rRNA sequencing. Susceptibility to ampicillin/sulbactam and carbapenems was determined by the disc diffusion method. Synergy was assessed using discs containing ampicillin/sulbactam and ceftazidime/avibactam. The EDTA-disc synergy test was used to screen metallo-β-lactamase-producing isolates, and in isolates showing synergy, the presence of blaNDM was confirmed by PCR. Statistical analysis was performed using Fisher’s exact test. Results High levels of resistance to ampicillin/sulbactam were found in the study. Thus, 1.1% (2/184), 11.4% (21/184) and 87.5% (161/184) of isolates were classified as susceptible, intermediate and resistant to ampicillin/sulbactam, respectively. Synergistic activity was observed in 97.2% of the non-susceptible CR-Ab isolates. The presence of metallo-β-lactamase producers (all blaNDM) was observed in three isolates (1.6%). Conclusions These findings demonstrate high levels of synergistic activity between ampicillin/sulbactam and ceftazidime/avibactam and their potential use as a treatment for CR-Ab.
In vitro activity of cefiderocol against nosocomial Acinetobacter baumannii
Barbara Ymaña, Rocío Egoávil-Espejo, Rosario Huerto-Huánuco, Rosario Oporto-Llerena, Carla A. Alonso, Angie K. Castillo, Luciano A. Palomino-Kobayashi, Carmen Valera-Krumdieck, Gabriela Soza, Tamin Ortiz-Gomez, Patricia Gonzales, María López, Gina Salvador-Luján, Beatriz Rojo-Bezares, Martin Casapia, Paula Toledano, Joseph Pinto, Maria Ramos Chirinos, Yolanda Sáenz, Maria J. Pons, Joaquim Ruiz
Microbiology Spectrum, 2025
The emergence and spread of third-/fourth-generation cephalosporin and/or carbapenem-resistant Acinetobacter baumannii have become a significant global public health concern, making new treatment alternatives necessary. Thus, the present study aimed to assess in vitro cefiderocol activity against clinical isolates of A. baumannii and analyze their relationship with extended-spectrum β-lactamases (ESBLs) and carbapenemases. Ninety-five A. baumannii clinical isolates were included in the study. Susceptibility to 12 antimicrobial agents was established by automated methods and/or disk diffusion, while that of colistin was determined following microdilution and that of cefiderocol by microdilution using iron-depleted broth. The presence of bla CTX-M , bla PER , bla VEB , bla GES , bla VIM , bla IMP , bla IMI , bla KPC , bla NDM , bla OXA-23G , bla OXA-24G , bla OXA-48G , and bla OXA-58G was established by PCR. The results showed extremely high levels of resistance (>80%) to all the tested antibacterial agents except colistin (11.6%) and cefiderocol (Clinical and Laboratory Standards Institute [CLSI]: 0%; US Food and Drug Administration [FDA]: 1.1%). Following FDA criteria, 22.1% of isolates were intermediate to cefiderocol, with 68.4% of isolates surpassing the European Committee on Antimicrobial Susceptibility Testing epidemiological cut off. Seven colistin-resistant isolates were only susceptible to cefiderocol following CLSI breakpoints, four of them qualifying as cefiderocol-intermediate following FDA breakpoints. No association between the presence of ESBLs or carbapenemases and cefiderocol minimum inhibitory concentration levels was observed. The present results show the potential utility of cefiderocol in the treatment of A. baumannii infections, highlighting the need for judicious use and continuous surveillance to prevent the emergence of cefiderocol-resistant A. baumannii clones. IMPORTANCE Antibiotic resistance is a silent pandemic challenging the treatment of infectious diseases worldwide, but also other medical practices, as, for instance, organ transplantation procedures. In Peru, current levels of antimicrobial resistance are worrisome. In this scenario, we have determined the in vitro activity of cefiderocol against a series of Acinetobacter baumannii exhibiting high levels of resistance to commonly used antibiotics. This activity is independent of the presence of the most common extended-spectrum beta-lactamases or carbapenemases. Obtained results showed the potential of cefiderocol to become an alternative for the treatment of this type of microorganism, but the high number of isolates bordering the considered breakpoint, despite the lack of use of cefiderocol in the country, also shows the need for a prudent use of this antibiotic to maximize its utility while minimizing the selection of resistant isolates.
Antibiotic-Resistant Pseudomonas aeruginosa from Market Meat in Peru
Fernando Guibert, Beatriz Rojo-Bezares, Kathya Espinoza, Carla A. Alonso, Rosario Oporto-Llerena, María López, Clara Taboada-Blanco, Yolanda Sáenz, Maria J. Pons, Joaquim Ruiz
Foodborne Pathogens and Disease, 2025
Unconsidered microorganisms, such as Pseudomonas aeruginosa, may be often recovered from food samples. This study aimed to characterize seven P. aeruginosa recovered from traditional market chicken meat in Lima, Peru. Antimicrobial susceptibility to 18 antimicrobial agents as well as the presence of amino acid changes in fluoroquinolone targets, 10 mediated colistin resistance ( mcr ) genes and integrons were analyzed. Clonal relationships were determined through pulsed-field gel electrophoresis (PFGE). Serotype by agglutination, multilocus sequence typing and the presence of 14 virulence factors (VFs) were established. Two isolates were multidrug-resistant, all being fluoroquinolone-resistant and exhibited the amino acid changes GyrA T 83 I and ParC S 87 L. No mcr gene was detected in the colistin-resistant isolates. The isolates showed identical PFGE patterns, and the selected P6 isolate belonged to the serotype O:4 and the sequence type 1800, and presented 12 VFs (all but exoU and exlA ). The present study highlights the presence of multidrug and virulent P. aeruginosa in market chicken meat, and suggests cross-contamination during meat manipulation.
Virulence and Resistance of Pseudomonas aeruginosa Isolated from Poultry in Brazil
Fernanda Borges Barbosa, Maria J. Pons, Joaquim Ruiz, Yolanda Sáenz, Henrik Christensen, Terezinha Knöbl
Microorganisms, 2025
Pseudomonas aeruginosa is an opportunistic pathogen commonly associated with infections in hospitalized and immunocompromised patients due to its virulence and antimicrobial resistance. In the poultry industry, it has been associated with hatchery mortality. This study aimed to characterize P. aeruginosa isolated from pipped eggs, one-day-old chicks, and broiler carcasses obtained from a slaughterhouse in São Paulo state, Brazil. Nineteen strains of P. aeruginosa were selected and their virulence genes were amplified via PCR. Clonality analysis was performed using BOX-PCR, and three strains were selected for whole-genome sequencing (WGS). All isolates carried aprA, plcH, plcN, lasA, lasB, lasI, lasR, rhlAB, and phzH. The exoA gene was detected in 73.7% of strains, while algD was present in 21.1%. The exoY and exoT genes were present in 94.7% of strains (18/19), whereas exoS was present in 47.4% (9/19). None of the isolates harbored the exoU gene. BOX-PCR and phylogenetic analyses revealed diverse clonal patterns. The sequenced strains were classified as O3 ST116, O2 ST1649, and O3 ST1744. The presence of virulence and antimicrobial resistance determinants in poultry-associated strains underscores the need for surveillance, as these isolates may represent a source for transmission of P. aeruginosa to humans. Our findings highlight the importance of monitoring P. aeruginosa within poultry production and emphasize the value of genomic approaches to understand its diversity, evolution, and public health risks.
In vitro ANTIBACTERIAL ACTIVITY OF EXTR ACTS AND PURIFIED FR ACTIONS FROM THE MARINE SPONGE Suberites aff. latus (Demospongiae, Suberitida, Suberitidae) FROM ICA, PERU
Erin Villanueva-Coronado, Juan C. Francia-Quiroz, Christian Polo, Oscar Reategui, Báslavi Cóndor-Luján, Aldo G. Indacochea, Maria J. Pons
Revista Peruana De Medicina Experimental Y Salud Publica, 2025
Las esponjas marinas constituyen una fuente reconocida de metabolitos con potencial actividad antibacteriana. En el presente estudio se evaluó la actividad antibacteriana de la esponja marina Suberites aff. latus de Ica, Perú. Las muestras de esponja liofilizadas se extrajeron utilizando diclorometano:metanol (1:1), y se fraccionaron mediante extracción en fase sólida en siete fracciones (F1–F7), que iban de la polaridad acuosa a laorgánica. Se determinó la concentración mínima inhibitoria frente a cepas bacterianas Grampositivas/negativas de colección ATCC (American Type Culture Collection). Los resultados mostraron que la mayor actividad fue observada en la fracción F6 del espécimen 01J frente a Klebsiella pneumoniae y Pseudomonas aeruginosa, así como en la fracción F3 del espécimen 02J frente a K. pneumoniae. El análisis químico cualitativo reveló la presencia de alcaloides y saponinas en las muestras. Estos hallazgos ponen de relieve el potencial de Suberites aff. latus de la costa peruana como fuente prometedora de compuestos antibacterianos.
Direct economic costs related to antimicrobial resistance in bloodstream infections isolated from newborns in a perinatal hospital in Peru
Maria J Pons, Antonio M Quispe, Miguel Tirado, Gabriela Soza, Joaquim Ruiz
International Health, 2025
Background Antimicrobial resistance (AMR) has emerged as a priority for both public health and the global economy. Moreover, information on AMR is scarce, particularly in low/middle-income countries. We evaluated the direct economic cost of microorganisms and AMR. Methods We performed a cross-sectional study to assess the economic costs of neonatal cases diagnosed with bacteremia at the Instituto Nacional Materno Perinatal in Lima, Peru, from January 2017 to June 2018. We used cost invoices calculated by the micro-costing bottom-up approach, as well as the strain identification and antimicrobial susceptibility data, to estimate the direct costs. Results The average costs of bacteremia were US$349 (SD 403) for multidrug-resistant (MDR) strains and US$276 (SD 349) for non-MDR strains. Costs were higher for microorganisms associated with late-onset sepsis (LOS). We found that LOS, multidrug resistance and age were significantly associated with bloodstream infection (BSI) costs. Also, all microorganism groups were associated with increased costs, with the highest average costs for Acinetobacter, followed by Pseudomonas. Conclusions In Peru, BSI costs are strongly associated with AMR. Furthermore, costs increase significantly with LOS, multidrug resistance and the patient's age. We urge health authorities to strengthen measures and strategies against the pressing threat of AMR.
Detection of rare β-lactamase blaSCO-1 from a Klebsiella pneumoniae high-risk clone in Peru
Luciano A Palomino-Kobayashi, Rocío Egoávil-Espejo, Gina Salvador-Luján, Pamela Yáñez, Ronnie G Gavilán, Maria J Pons, Joaquim Ruiz
Jac Antimicrobial Resistance, 2025
Background The blaSCO-1 gene, which codes for a carbenicillinase, is an uncommon β-lactamase. To the best of our knowledge, we report the first instance of a Klebsiella pneumoniae clinical high-risk isolate carrying blaSCO-1 in Peru. Objectives To characterize a K. pneumoniae clinical isolate carrying blaSCO-1 in Peru, isolated from a tertiary care hospital in Lima, Peru. Methods Susceptibility to amoxicillin/clavulanic acid, amoxicillin/sulbactam, piperacillin/tazobactam, aztreonam, ceftriaxone, cefotaxime, ceftazidime, ceftazidime/avibactam, cefepime, imipenem, meropenem, ciprofloxacin, trimethoprim/sulfamethoxazole, gentamicin, amikacin and tigecycline was determined using the Kirby–Bauer disc diffusion method. Detection of blaSCO-1 was established by Illumina WGS and bioinformatic analyses. All the publicly available genomes from K. pneumoniae carrying blaSCO-1 from the American continent were downloaded from the NCBI Isolates browser for assessment of phylogenetic comparisons. Results The isolate showed resistance to all the tested antibiotics except for ceftazidime/avibactam, carbapenems and tigecycline. Illumina WGS showed the presence of blaSCO-1 and blaOXA-1, blaSHV-28, blaTEM-1, blaCTX-M-15, as well as genes associated with resistance to quinolones, fosfomycin, aminoglycosides, sulphonamides, trimethoprim and phenicols. Moreover, the isolate was ST307, a high-risk clone of K. pneumoniae usually associated with blaCTX-M-15 and/or carbapenemases. Notwithstanding, the latter were not found on this isolate. Phylogenetic relationships were established by comparisons with 19 K. pneumoniae genomes carrying blaSCO-1 from other countries in the Americas, revealing at least three different clades. Conclusions This study highlights the importance of genomic surveillance of uncommon antimicrobial resistance genes such as blaSCO-1, which might contribute to further antimicrobial resistance levels in this country.
Carbapenem-Resistant Pseudomonas aeruginosa from Guanay Cormorants on Is. Pescadores, Peru
Luciano A. Palomino-Kobayashi, Carlos Zavalaga, Cinthia Irigoin-Lovera, Diego Gonzales-DelCarpio, Rocío Egoávil-Espejo, Fernanda Borges-Barbosa, Maria J. Pons, Joaquim Ruiz
Ecohealth, 2025
In vitro activity of cefiderocol against ESBL-producing and carbapenem-resistant Pseudomonas aeruginosa
Rocío Egoávil-Espejo, Barbara Ymaña, Rosario Oporto-Llerena, Dafne Navarro, Rosario Huerto-Huánuco, Gina Salvador-Luján, Tamin Ortiz-Gómez, Maria Pinedo-Bardales, Luciano A Palomino-Kobayashi, Andrea C Gómez, Angie K Castillo, Patricia Gonzales, Carmen Valera-Krumdieck, Gabriela Soza, Cristhian Zapata-Cachay, Maribel Riveros, Maria J Pons, Joaquim Ruiz
Jac Antimicrobial Resistance, 2025
Traditional marketed meats as a reservoir of multidrug-resistant Escherichia coli
Fernando Guibert, Kathya Espinoza, Clara Taboada-Blanco, Carla A. Alonso, Rosario Oporto, Angie K. Castillo, Beatriz Rojo-Bezares, María López, Yolanda Sáenz, Maria J. Pons, Joaquim Ruiz
International Microbiology, 2025
Kinetics of anti-SARS-CoV-2 antibodies and hematological parameters in hospitalized pre-vaccination COVID-19 patients in Peru
Salyoc Tapia-Rojas, Alexis Germán Murillo Carrasco, Maria J. Pons, Manuel Ugarte-Gil, Ana Mayanga-Herrera
Peerj, 2025
SARS-CoV-2-specific humoral and cellular immunity assessment in Peruvian vaccinated population: a cross-sectional study
Marlon Yuri Garcia-Paitan, Salyoc Tapia-Rojas, Hector Santiago Alvarez Vega, Javier Enciso-Benavides, Maria J. Pons, Ana Mayanga-Herrera
Peerj, 2025
blaOXA−51-Negative Acinetobacter calcoaceticus–baumannii Complex as a Cause of Human Infection in Peru
Rosario Oporto-Llerena, Rosario Huerto-Huánuco, Yaneth Quispe-Hualpa, Luciano A. Palomino-Kobayashi, Gabriela Soza, Jesús Rojas-Jaimes, Patricia Gonzales, Luis Pollack, Andrea C. Gomez, Gina Salvador-Luján, Edwin Cuaresma, Nestor Luque, Martín Casapia, Kovy Arteaga-Livias, Yolanda Sáenz, Maria J. Pons, Joaquim Ruiz
Journal of Tropical Medicine, 2025
RESISTANCE TO CEPHALOSPORINS AND QUINOLONES IN Escherichia coli ISOLATED FROM IRRIGATION WATER FROM THE RÍMAC RIVER IN EAST LIMA, PERU
Mónica Huamán Iturrizaga, Gina Salvador-Luján, Liliana Morales, Jeanne Alba Luna, Lino Velasquez Garcia, Julio Daniel Pacheco Perez, Maria J. Pons
Revista Peruana De Medicina Experimental Y Salud Publica, 2024
Antimicrobial resistance and associated risk factors in Escherichia coli isolated from Peruvian dogs: A focus on extended-spectrum β-lactamases and colistin
Margot Ventura, Rosario Oporto-Llerena, Kathya Espinoza, Fernando Guibert, Antonio M. Quispe, Nidia Vilar, María López, Beatriz Rojo-Bezares, Yolanda Sáenz, Joaquim Ruiz, Maria J. Pons
Veterinary World, 2024
Cytokine Profile Response of Human Peripheral Blood Mononuclear Cells Stimulated by Bartonella bacilliformis
Barbara Ymaña, Javier Enciso-Benavides, Gemma Moncunill, Maria J. Pons
Journal of Interferon and Cytokine Research, 2024
Clonal dissemination of Acinetobacter radioresistens among Humboldt penguins (Spheniscus humboldti) inhabiting a barren northern Peruvian island
Ignasi Roca, Kathya Espinoza, Cinthia Irigoin-Lovera, Maria Piquet, Luciano A. Palomino-Kobayashi, Angie K. Castillo, Diego D. Gonzales-DelCarpio, Joaquim Viñes, Laura Muñoz, Barbara Ymaña, Rosario Oporto, Carlos Zavalaga, Maria J. Pons, Joaquim Ruiz
European Journal of Microbiology and Immunology, 2024
High Anti-Interferon-Alpha Autoantibody Levels in Severe/Critical COVID-19 Patients from Peru
Maria J. Pons, Ana Mayanga-Herrera, Luciano A. Palomino-Kobayashi, Antonio M. Quispe, Manuel F. Ugarte-Gil
Journal of Interferon and Cytokine Research, 2023
Isolation and Identification of Non-O1/Non-O139 Vibrio cholerae in Wild Birds Inhabiting Wetlands in Metropolitan Lima, Peru
Kathya Espinoza, Xiomara Caffo, Jacqueline Hernández, Raul Olaechea, Maria J. Pons, Joaquim Ruiz
Journal of Wildlife Diseases, 2023
FIRST DESCRIPTION OF AN INFECTION BY acinetobacter pitti / lactucae SUBCOMPLEX IN PERU
Carla Andrea Alonso, Jorge Choque-Matos, Fernando Guibert, Beatriz Rojo-Bezares, María López, Rocio Egoávil-Espejo, Patricia Gonzales, Carmen Valera-Krumdieck, Maria J. Pons, Yolanda Saénz, Joaquim Ruiz
Revista Peruana De Medicina Experimental Y Salud Publica, 2023
Transferable mechanisms of quinolone resistance are more frequent among enterotoxigenic Escherichia coli isolates displaying low-level quinolone resistance
Medina A.M.
Tropical Biomedicine, 2023
Colonizing and Virulence Factors in Enterotoxigenic Escherichia coli from Peru
Fulton P. Rivera, Anicia Medina, Maribel Riveros, Theresa J. Ochoa, Maria J. Pons, Joaquim Ruiz
American Journal of Tropical Medicine and Hygiene, 2023
High rates of extensively drug-resistant Acinetobacter baumannii in a Peruvian hospital 2013–2019
Rodrigo Samuel Barrientos-Yong, Bryan Andrei Hinojosa-Salas, Percy Genaro Salas-Ponce, Eddie Angles, Joaquim Ruiz, Maria J Pons
Tropical Doctor, 2023
Brevundimonas spp. infection in immunocompromised children: Two case reports
Andreé Altamirano-Beltrán, Christian Chiara-Chilet, José W López, Maria J Pons, Julio Maquera-Afaray
Germs, 2023
Class 1 and 2 Integrons in Escherichia coli Strains Isolated from Diarrhea and Bacteremia in Children Less Than 2 Years of Age from Peru
Maribel Riveros, Maria J. Pons, David Durand, Theresa J. Ochoa, Joaquim Ruiz
American Journal of Tropical Medicine and Hygiene, 2023
CLINICAL-EPIDEMIOLOGICAL CHARACTERISTICS OF DENGUE DEATHS DURING AN OUTBREAK IN NORTHERN PERU
Néstor Luque, Catia Cilloniz, María J. Pons, Fernando Donaires, Roger Albornoz, Moisés Mendocilla-Risco, Manuel Espinoza
Revista Peruana De Medicina Experimental Y Salud Publica, 2023
First report of CrpP prevalence in a South American country
Joaquim Ruiz, Karen Ocampo, Gina Salvador-Luján, Yelinda V. Reyes, Andrea C. Gómez, Carmen Valera-Krumdieck, Ariana D. Baca-Cumpa, Gabriela Soza, Joseph A. Pinto, María Ramos-Chirinos, José Lagos, Maribel Riveros, Maria J. Pons
New Microbes and New Infections, 2023
Dengue and COVID-19 Co-Circulation in the Peruvian Amazon: A Population-Based Study
Maria J. Pons, Ana Mayanga-Herrera, Gabriela M. Ulloa, Barbara Ymaña, Sabrina Medina, Freddy Alava, Carlos Álvarez-Antonio, Graciela Meza-Sánchez, Carlos Calampa, Wilma Casanova, Cristiam Carey, Hugo Rodríguez-Ferrucci, Amy C. Morrison, Antonio M. Quispe
American Journal of Tropical Medicine and Hygiene, 2023
Corrigendum: Zonulin, a marker of gut permeability, is associated with mortality in a cohort of hospitalised peruvian COVID-19 patients, (Front. Cell. Infect. Microbiol, (2022), 12, (1000291), 10.3389/fcimb.2022.1000291)
Luciano A. Palomino-Kobayashi, Barbara Ymaña, Joaquim Ruiz, Ana Mayanga-Herrera, Manuel F. Ugarte-Gil, Maria J. Pons
Frontiers in Cellular and Infection Microbiology, 2022
Estimation of inherent bacterial DNA contamination in a qPCR master mix: concerns about background DNA of reagents
Luciano A. PALOMINO-KOBAYASHI, Maria J. PONS, Joaquim RUIZ
Minerva Biotechnology and Biomolecular Research, 2022
KPC-2-NDM-1-producing Serratia marcescens: first description in Peru
Barbara Ymaña, Nestor Luque, Maria J. Pons, Joaquim Ruiz
New Microbes and New Infections, 2022
Zonulin, a marker of gut permeability, is associated with mortality in a cohort of hospitalised peruvian COVID-19 patients
Luciano A. Palomino-Kobayashi, Barbara Ymaña, Joaquim Ruiz, Ana Mayanga-Herrera, Manuel F. Ugarte-Gil, Maria J. Pons
Frontiers in Cellular and Infection Microbiology, 2022
Antibiotic susceptibility among non-clinical Escherichia coli as a marker of antibiotic pressure in Peru (2009–2019): one health approach
Angie K. Castillo, Kathya Espinoza, Antony F. Chaves, Fernando Guibert, Joaquim Ruiz, Maria J. Pons
Heliyon, 2022
Worrying levels of antimicrobial resistance in Gram-negative bacteria isolated from cell phones and uniforms of Peruvian intensive care unit workers
Barbara Ymaña, Nestor Luque, Joaquim Ruiz, Maria J Pons
Transactions of the Royal Society of Tropical Medicine and Hygiene, 2022
Bibliometric trends of scientific publications on antimicrobial resistance in Escherichia coli in Peru from 2009-2019
Joaquim Ruiz, Angie K Castillo, Kathya Espinoza, Antony F Chaves, Fernando Guibert, Maria J Pons
Revista Del Cuerpo Medico Hospital Nacional Almanzor Aguinaga Asenjo, 2022
EVOLUTION OF THE PREVALENCE AND ANTIMICROBIAL RESISTANCE AMONG Escherichia coli ISOLATED AS A CAUSE OF INFECTION IN PATIENTS ADMITTED TO A IV-LEVEL HOSPITAL IN LIMA, PERU
Wilfredo Flores-Paredes*, Nestor Luque*, Roger Albornoz, Nayade Rojas, Manuel Espinoza, Joaquim Ruiz, Maria J Pons
Journal of Tropical Pathology, 2022
Description of a Klebsiella pneumoniae strain with blaOXA-48 gene in Lima-Peru
Matías Penagos-Avila, María J. Pons
Revista Del Cuerpo Medico Hospital Nacional Almanzor Aguinaga Asenjo, 2022
Recurrence of Urinary Tract Infections due to Escherichia coli and Its Association with Antimicrobial Resistance
Maria Angeles Ormeño, Maria José Ormeño, Antonio M. Quispe, Miguel Angel Arias-Linares, Elba Linares, Felix Loza, Joaquim Ruiz, Maria J. Pons
Microbial Drug Resistance, 2022
Bartonellaceae
Joaquim Ruiz, Cláudia Gomes, Maria J. Pons
Molecular Typing in Bacterial Infections Volume II Second Edition, 2022
Retrospective analysis of the emergence of antibiotic-resistant Salmonella enterica infections in a level IV hospital from Lima, Peru
Joaquim Ruiz, Wilfredo Flores-Paredes, Nestor Luque, Roger Albornoz, Nayade Rojas, Manuel Espinoza, Maria J Pons
Tropical Doctor, 2022
Evolution of antimicrobial resistance levels of eskape microorganisms in a peruvian iv-level hospital
Wilfredo Flores-Paredes, Nestor Luque, Roger Albornoz, Nayade Rojas, Manuel Espinoza, Maria J. Pons, Joaquim Ruiz
Infection and Chemotherapy, 2021
Cytokine Profiles Associated With Worse Prognosis in a Hospitalized Peruvian COVID-19 Cohort
Maria J. Pons, Barbara Ymaña, Ana Mayanga-Herrera, Yolanda Sáenz, Lydia Alvarez-Erviti, Salyoc Tapia-Rojas, Roxana Gamarra, Amanda B. Blanco, Gemma Moncunill, Manuel F. Ugarte-Gil
Frontiers in Immunology, 2021
Immunogenic peptides from Pap31 and SCS-α of Bartonella bacilliformis: One step closer to a rapid diagnostic tool for Carrion’s disease
Cláudia Gomes, Maria J. Pons, Juana del Valle-Mendoza, Mayumi Matsuoka, Joaquim Ruiz
Pathogens, 2021
Antimicrobial resistance levels among gram-negative bacteria from peruvian boobies (Sula variegata) in Northern Peru
Kathya Espinoza, Carlos Zavalaga, Cinthia Irigoin-Lovera, Diego D. Gonzales-DelCarpio, Isabella Díaz-Santibañez, Maria J. Pons, Joaquim Ruiz
Journal of Wildlife Diseases, 2021
Dissemination of a multidrug resistant CTX-M-65 producer Salmonella enterica serovar Infantis clone between marketed chicken meat and children
Sandra Martínez-Puchol, Maribel Riveros, Kenny Ruidias, Ana Granda, Lidia Ruiz-Roldán, Cristhian Zapata-Cachay, Theresa J. Ochoa, Maria J. Pons, Joaquim Ruiz
International Journal of Food Microbiology, 2021
Prevalence and antimicrobial resistance of non-ESKAPE-Ec Enterobacteriales in a IV-level hospital in Lima, Peru
Acta Microbiologica Hellenica, 2021
Multidrug-Resistant Salmonella enterica Isolated in Paca (Cuniculus paca) Carcasses from the Belen Market, Iquitos, Perú
Claudia Maguiña-Molina, Maria J. Pons, Manuel J. Beltrán, Siever Morales-Cauti
Foodborne Pathogens and Disease, 2021
Multidrug resistance and its association with Enterobacteriales and age among pregnant Peruvian women with- bacteremia
Antonio M Quispe, Gabriela Soza, Maria J Pons
Journal of Infection in Developing Countries, 2021
Characterization of escherichia coli d7111 producing the β-lactamase tem-176
Joaquim Ruiz, Maria J. Pons, Susan Mosquito, Theresa J. Ochoa, Yolanda Sáenz
Revista Peruana De Medicina Experimental Y Salud Publica, 2021
MULTIDRUG-RESISTANT Escherichia coli IN URINE CULTURES PERFORMED AT THE NATIONAL MATERNAL-PERINATAL INSTITUTE OF LIMA, PERU
Wendy V. Blas, Ida B. Gerónimo, Gabriela M. Ulloa, Mónica Huaman, Maria J. Pons
Revista Peruana De Medicina Experimental Y Salud Publica, 2021
Tolerance to disinfectants (chlorhexidine and isopropanol) and its association with antibiotic resistance in clinically-related Klebsiella pneumoniae isolates
Jasmine Morante, Antonio M. Quispe, Barbara Ymaña, Jeel Moya-Salazar, Néstor Luque, Gabriela Soza, María Ramos Chirinos, Maria J Pons
Pathogens and Global Health, 2021
Multidrug resistance bacteremia in neonates and its association with late-onset sepsis and Coagulase-negative Staphylococci
Antonio M Quispe, Gabriela Soza, Maria Ramos Chirinos, Danny Quiroz, Maria J Pons
Journal of Infection in Developing Countries, 2020
Colistin resistance in multidrug-resistant klebsiella pneumoniae strains at a perinatal maternal institute in Lima, Peru, 2015-2018
Andrea Naomi-Matsuoka, Marina Vargas, Barbara Ymaña, Gabriela Soza, Maria J. Pons
Revista Peruana De Medicina Experimental Y Salud Publica, 2020
Spread of st348 klebsiella pneumoniae producing NDM-1 in a peruvian hospital
Maria J. Pons, Marta Marí-Almirall, Barbara Ymaña, Jeel Moya-Salazar, Laura Muñoz, Sharon Sauñe, Richard Salazar-Hernández, Jordi Vila, Ignasi Roca
Microorganisms, 2020
Escherichia coli st131 clones harbouring AGGR and AAF/V fimbriae causing bacteremia in Mozambican children: Emergence of new variant of FIMH27 subclone
Inácio Mandomando, Delfino Vubil, Nadia Boisen, Llorenç Quintó, Joaquim Ruiz, Betuel Sigaúque, Tacilta Nhampossa, Marcelino Garrine, Sergio Massora, Pedro Aide, Ariel Nhacolo, Maria J. Pons, Quique Bassat, Jordi Vila, Eusébio Macete, Flemming Scheutz, Myron M. Levine, Fernando Ruiz-Perez, James P. Nataro, Pedro L. Alonso
Plos Neglected Tropical Diseases, 2020
Nitrofuran resistance in Salmonella enterica isolated from meat for human consumption
Sandra Martínez-Puchol, Maria J. Pons, Lidia Ruiz-Roldán, Laura Laureano-Adame, Alfredo Corujo, Theresa J. Ochoa, Joaquim Ruiz
Revista Peruana De Medicina Experimental Y Salud Publica, 2020
Validation of a universal set of primers to study animal-associated microeukaryotic communities
Javier del Campo, Maria J. Pons, Maria Herranz, Kevin C. Wakeman, Juana del Valle, Mark J. A. Vermeij, Brian S. Leander, Patrick J. Keeling
Environmental Microbiology, 2019
Pathogenic Acinetobacter species including the novel Acinetobacter dijkshoorniae recovered from market meat in Peru
Marta Marí-Almirall, Clara Cosgaya, Maria J. Pons, Alexandr Nemec, Theresa J. Ochoa, Joaquim Ruiz, Ignasi Roca, Jordi Vila
International Journal of Food Microbiology, 2019
Emergence and spread of carbapenem-resistant Acinetobacter baumannii international clones II and III in Lima, Peru article
Saúl Levy-Blitchtein, Ignasi Roca, Stefany Plasencia-Rebata, William Vicente-Taboada, Jorge Velásquez-Pomar, Laura Muñoz, Javier Moreno-Morales, Maria J. Pons, Juana del Valle-Mendoza, Jordi Vila
Emerging Microbes and Infections, 2018
Revisiting Bartonella bacilliformis MLST
Joaquim Ruiz, Maria J. Pons
Infection Genetics and Evolution, 2018
Epidemiology and molecular characterization of multidrug-resistant escherichia coli isolates harboring blaCTX-M group 1 extended-spectrum β-lactamases causing bacteremia and urinary tract infection in manhiça, mozambique
Elisabet Guiral, Maria Jesús Pons, Delfino Vubil, Marta Marí-Almirall, Betuel Sigaúque, Sara Maria Soto, Pedro Luís Alonso, Joaquim Ruiz, Jordi Vila, Inácio Mandomando
Infection and Drug Resistance, 2018
Presence of multidrug resistant enterobacteriaceae and escherichia coli in meat purchased in traditional markets of lima
Lidia Ruiz-Roldán, Sandra Martínez-Puchol, Cláudia Gomes, Noemí Palma, Maribel Riveros, Karen Ocampo, David Durand, Theresa J. Ochoa, Joaquim Ruiz, Maria J. Pons
Revista Peruana De Medicina Experimental Y Salud Publica, 2018
Differences in tetracycline resistance determinant carriage among Shigella flexneri and Shigella sonnei are not related to different plasmid Inc-type carriage
María J. Pons, Alba Torrents de la Peña, Laura Mensa, Pilar Martón, Lidia Ruiz-Roldán, Sandra Martínez-Puchol, Jordi Vila, Joaquim Gascón, Joaquim Ruiz
Journal of Global Antimicrobial Resistance, 2018
Molecular detection of Bartonella bacilliformis in Lutzomyia maranonensis in Cajamarca, Peru: A new potential vector of Carrion's disease in Peru?
Gabriela M. Ulloa, Fernando Vásquez-Achaya, Cláudia Gomes, Luis J. del Valle, Joaquim Ruiz, Maria J. Pons, Juana del Valle Mendoza
American Journal of Tropical Medicine and Hygiene, 2018
Resistance to quinolones, cephalosporins and macrolides in Escherichia coli causing bacteraemia in Peruvian children
Noemí Palma, Maria J. Pons, Cláudia Gomes, Judit Mateu, Maribel Riveros, Wilfredo García, Jan Jacobs, Coralith García, Theresa J. Ochoa, Joaquim Ruiz
Journal of Global Antimicrobial Resistance, 2017
An atypical case of disseminated cutaneous leishmaniasis due to Leishmania peruviana in the valleys of Ancash-Peru
Diego Espinoza-Morales, Aldo Lucchetti Rodríguez, Wilmer Silva-Caso, Luis Suarez-Ognio, María J. Pons, Juana del Valle Mendoza
Asian Pacific Journal of Tropical Medicine, 2017
Etiology, epidemiology and clinical characteristics of acute diarrhea in hospitalized children in rural Peru
Angela Cornejo-Tapia, Fiorella Orellana- Peralta, Pablo Weilg, Jorge Bazan-Mayra, Hernán Cornejo-Pacherres, Gabriela Ulloa-Urizar, Miguel Angel Aguilar-Luis, Maria Jesus Pons, Juana Del Valle-Mendoza
Journal of Infection in Developing Countries, 2017
Immunosuppressive and angiogenic cytokine profile associated with Bartonella bacilliformis infection in post-outbreak and endemic areas of Carrion's disease in Peru
Maria J. Pons, Cláudia Gomes, Ruth Aguilar, Diana Barrios, Miguel Angel Aguilar-Luis, Joaquim Ruiz, Carlota Dobaño, Juana del Valle-Mendoza, Gemma Moncunill
Plos Neglected Tropical Diseases, 2017
Macrolide resistance mechanisms in Enterobacteriaceae: Focus on azithromycin
Cláudia Gomes, Sandra Martínez-Puchol, Noemí Palma, Gertrudis Horna, Lidia Ruiz-Roldán, Maria J Pons, Joaquim Ruiz
Critical Reviews in Microbiology, 2017
Carrion's disease: An eradicable illness?
Cláudia Gomes, Maria J. Pons, Juana del Valle Mendoza, Joaquim Ruiz
Infectious Diseases of Poverty, 2016
Antimicrobial resistance levels among diarrhoeagenic micro-organisms recovered from children under-5 with acute moderate-to-severe diarrhoea in Rabat, Morocco
Rachid Benmessaoud, Mouane Nezha, Cinta Moraleda, Imane Jroundi, Houssain Tligui, Myriam Seffar, Maria J. Pons, Miriam J. Alvarez, Saad Chaacho, Jordi Vila, Pedro L. Alonso, Quique Bassat, Joaquim Ruiz
Journal of Global Antimicrobial Resistance, 2016
Carrion's disease after blood transfusion
María J. Pons, Pedro Eduardo Lovato, João Vitor dos Santos Alves da Silva, Numan Urteaga, Juana del Valle-Mendoza, et al.
Blood Transfusion, 2016
Infectious agents, Leptospira spp. and Bartonella spp., in blood donors from Cajamarca, Peru
María J. Pons, Numan Urteaga, Carlos Alva-Urcia, Pedro Eduardo Lovato, João Vitor dos Santos Alves da Silva, et al.
Blood Transfusion, 2016
Carrion’s Disease: More Than a Sand Fly–Vectored Illness
Maria J. Pons, Cláudia Gomes, Juana del Valle-Mendoza, Joaquim Ruiz
Plos Pathogens, 2016
Development and characterisation of highly antibiotic resistant Bartonella bacilliformis mutants
Cláudia Gomes, Sandra Martínez-Puchol, Lidia Ruiz-Roldán, Maria J. Pons, Juana del Valle Mendoza, Joaquim Ruiz
Scientific Reports, 2016
Succinyl-CoA Synthetase: New Antigen Candidate of Bartonella bacilliformis
Cláudia Gomes, Noemí Palma, Maria J. Pons, Ariel Magallón-Tejada, Isabel Sandoval, Carmen Tinco-Valdez, Carlos Gutarra, Juana del Valle-Mendoza, Joaquim Ruiz, Mayumi Matsuoka
Plos Neglected Tropical Diseases, 2016
Arboviruses emerging in Peru: Need for early detection of febrile syndrome during El Niño episodes
Derek Tantaléan-Yépez, José Sánchez-Carbonel, Gabriela Ulloa-Urizar, Miguel Angel Aguilar-Luis, Diego Espinoza-Morales, Wilmer Silva-Caso, María J. Pons, Juana del Valle-Mendoza
Asian Pacific Journal of Tropical Medicine, 2016
Evaluation of PCR Approaches for Detection of Bartonella bacilliformis in Blood Samples
Cláudia Gomes, Sandra Martinez-Puchol, Maria J. Pons, Jorge Bazán, Carmen Tinco, Juana del Valle, Joaquim Ruiz
Plos Neglected Tropical Diseases, 2016
Multi-Locus Sequence Typing of Bartonella bacilliformis DNA Performed Directly from Blood of Patients with Oroya’s Fever During a Peruvian Outbreak
Maria J. Pons, Wilmer Silva-Caso, Juana del Valle-Mendoza, Joaquim Ruiz
Plos Neglected Tropical Diseases, 2016
High prevalence of Bordetella pertussis in children under 5years old hospitalized with acute respiratory infections in Lima, Peru
Ivana Pavic-Espinoza, Sandy Bendezú-Medina, Angella Herrera-Alzamora, Pablo Weilg, María J. Pons, Miguel Angel Aguilar-Luis, Verónica Petrozzi-Helasvuo, Juana del Valle Mendoza
BMC Infectious Diseases, 2015
Is glucose-6-phosphate dehydrogenase deficiency more prevalent in Carrion's disease endemic areas in Latin America?
Fernando Mazulis, Claudia Weilg, Carlos Alva-Urcia, Maria J. Pons, Juana del Valle Mendoza
Asian Pacific Journal of Tropical Medicine, 2015
Bordetella pertussis diagnosis in children under five years of age in the regional hospital of Cajamarca, northern Peru
Juana Del Valle-Mendoza, Veronica Casabona-Oré, Veronica Petrozzi-Helasvuo, Angela Cornejo-Tapia, Pablo Weilg, Maria J Pons, Erico Cieza-Mora, Jorge Bazán-Mayra, Hernan Cornejo-Pacherres, Joaquin Ruiz
Journal of Infection in Developing Countries, 2015
Antibiotic resistance in Bartonella bacilliformis clinical isolates from an endemic area of Peru
W. Silva-Caso, M.J. Pons, J. Ruiz, J. del Valle-Mendoza
Journal of Global Antimicrobial Resistance, 2015
Development and analysis of furazolidone-resistant Escherichia coli mutants
Sandra Martínez‐Puchol, Cláudia Gomes, Maria J. Pons, Lidia Ruiz‐Roldán, Alba Torrents de la Peña, Theresa J. Ochoa, Joaquim Ruiz
APMIS, 2015
Characterization of two Achromobacter xylosoxidans isolates from patients with pertussis-like symptoms
Fiorella Orellana-Peralta, Michelle Jacinto, Maria J. Pons, Cláudia Gomes, Carlos Bada, Isabel Reyes, Juana del Valle Mendoza, Joaquim Ruiz
Asian Pacific Journal of Tropical Medicine, 2015
Comparative analysis of antimicrobial resistance in enterotoxigenic Escherichia coli isolates from two paediatric cohort studies in Lima, Peru
Anicia M. Medina, Fulton P. Rivera, Maria J. Pons, Maribel Riveros, Cláudia Gomes, María Bernal, Rina Meza, Ryan C. Maves, Luis Huicho, Elsa Chea-Woo, Claudio F. Lanata, Ana I. Gil, Theresa J. Ochoa, Joaquim Ruiz
Transactions of the Royal Society of Tropical Medicine and Hygiene, 2015
Characterisation of extended-spectrum β-lactamases among Klebsiella pneumoniae isolates causing bacteraemia and urinary tract infection in Mozambique
Maria J. Pons, Delfino Vubil, Elisabet Guiral, Dinis Jaintilal, Oscar Fraile, Sara M. Soto, Betuel Sigaúque, Tacilta Nhampossa, Pedro Aide, Pedro L. Alonso, Jordi Vila, Inacio Mandomando, Joaquim Ruiz
Journal of Global Antimicrobial Resistance, 2015
Diarrheagenic escherichia coli phylogroups are associated with antibiotic resistance and duration of diarrheal episode
Susan Mosquito, Maria J. Pons, Maribel Riveros, Joaquim Ruiz, Theresa J. Ochoa
Scientific World Journal, 2015
Case report: Possible vertical transmission of bartonella bacilliformis in Peru
Ximena L. Tuya, Raffo Escalante-Kanashiro, Carmen Tinco, Maria J. Pons, Verónica Petrozzi, Joaquim Ruiz, Juana del Valle
American Journal of Tropical Medicine and Hygiene, 2015
An unidentified cluster of infection in the Peruvian Amazon region
Angela Cornejo, Claudia Gomes, Luis Suarez, Sandra Martinez-Puchol, Pershing Bustamante, Maria J Pons, Joaquim Ruiz, Juana Del Valle Mendoza
Journal of Infection in Developing Countries, 2015
Aetiology, Epidemiology and clinical characteristics of acute moderate-to-severe diarrhoea in children under 5 years of age hospitalized in a referral paediatric hospital in Rabat, Morocco
Rachid Benmessaoud, Imane Jroundi, Mouane Nezha, Cinta Moraleda, Houssain Tligui, Myriam Seffar, Miriam J. Alvarez-Martínez, Maria J. Pons, Saad Chaacho, Edward B. Hayes, Jordi Vila, Pedro L. Alonso, Quique Bassat, Joaquim Ruiz
Journal of Medical Microbiology, 2015
Diagnosis of Carrion's disease by direct blood PCR in thin blood smear negative samples
Juana del Valle Mendoza, Wilmer Silva Caso, Carmen Tinco Valdez, Maria J. Pons, Luis J. del Valle, Verónica Casabona Oré, Denisse Champin Michelena, Jorge Bazán Mayra, Víctor Zavaleta Gavidea, Martha Vargas, Joaquim Ruiz
Plos One, 2014
Analysis of quinolone-resistance in commensal and diarrheagenic escherichia coli isolates from infants in lima, Peru
M. J. Pons, S. Mosquito, C. Gomes, L. J. del Valle, T. J. Ochoa, J. Ruiz
Transactions of the Royal Society of Tropical Medicine and Hygiene, 2014
Prevention of travellers' diarrhoea: Where and who?
Joaquim Ruiz, Maria J Pons
Lancet Infectious Diseases, 2013
Relevant role of efflux pumps in high levels of rifaximin resistance in Escherichia coli clinical isolates
C. Gomes, L. Ruiz, M. J. Pons, T. J. Ochoa, J. Ruiz
Transactions of the Royal Society of Tropical Medicine and Hygiene, 2013
Antimicrobial resistance in Shigella spp. causing traveller's diarrhoea (1995-2010): A retrospective analysis
M.J. Pons, C. Gomes, S. Martínez-Puchol, L. Ruiz, L. Mensa, J. Vila, J. Gascón, J. Ruiz
Travel Medicine and Infectious Disease, 2013
In vitro development and analysis of escherichia coli and shigella boydii azithromycin-resistant mutants
Cláudia Gomes, Maria J. Pons, Ariel Magallon-Tejada, David Durand, Angela Lluque, Susan Mosquito, Maribel Riveros, Erik Mercado, Ana Prada, Theresa J. Ochoa, Joaquim Ruiz
Microbial Drug Resistance, 2013
QnrVC, una nueva familia Qnr transferible
Maria J. Pons, Cláudia Gomes, Joaquim Ruiz
Enfermedades Infecciosas Y Microbiologia Clinica, 2013
β-Lactamases, transferable quinolone resistance determinants, and class 1 integron-mediated antimicrobial resistance in human clinical Salmonella enterica isolates of non-Typhimurium serotypes
Mar Olga Pérez-Moreno, Ester Picó-Plana, María de Toro, Jesús Grande-Armas, Vanessa Quiles-Fortuny, María Jesús Pons, Cláudia Gomes, Yolanda Sáenz, Carmen Torres, Joaquim Ruiz
International Journal of Medical Microbiology, 2013
Molecular mechanisms of antibiotic resistance in diarrhoeagenic Escherichia coli isolated from children
Susan Mosquito, Joaquim Ruiz, María J. Pons, David Durand, Francesca Barletta, Theresa J. Ochoa
International Journal of Antimicrobial Agents, 2012
Long time survival of Bartonella bacilliformis in blood stored at 4 °C. A risk for blood transfusions
Joaquı́m Ruiz, Wilmer Silva, María J. Pons, Del Valle Lj, Tinco Cr, et al.
Blood Transfusion, 2012
Fitness and molecular mechanisms of resistance to rifaximin in in vitro selected Escherichia coli mutants
Maria J. Pons, Laura Mensa, Joaquim Gascón, Joaquim Ruiz
Microbial Drug Resistance, 2012
Transferable mechanisms of quinolone resistance
Joaquim Ruiz, Maria J. Pons, Cláudia Gomes
International Journal of Antimicrobial Agents, 2012
Levels of quinolones resistance and other antimicrobial in non-pathogenic escherichia coli strains in children from the Periurban area of lima, Peru
María J. Pons, Susan Mosquito, Theresa J. Ochoa, Martha Vargas, Margarita Molina, Angela Lluque, Ana I. Gil, Lucie Ecker, Francesca Barletta, Claudio F. Lanata, Luis J. Del Valle, Joaquim Ruiz
Revista Peruana De Medicina Experimental Y Salud Publica, 2012
FOCUS 1: A randomized, double-blinded, multicentre, phase III trial of the efficacy and safety of ceftaroline fosamil versus ceftriaxone in community-acquired pneumonia
T. M. File, D. E. Low, P. B. Eckburg, G. H. Talbot, H. D. Friedland, J. Lee, L. Llorens, I. A. Critchley, D. A. Thye, on behalf of the FOCUS 1 investigators, J. Pullman, P. Giordano, J. Welker, P. Manos, P. Mehra, T. File, J. De Santo, B. Venkateswaralu, C. Gerald Schrock, W. Tillis, J. A. Winetz, J. M. Gonzalez, A. Ramage, D. D. Eisenhower, C. Koegelenberg, I. Engelbrecht, J. Jurgens, I. Mitha, J. Breedt, M. Gani, J. Roos, M. Basson, L. Van Zyl, R. Meeding, M. Fulat, M. Le Roux, P. E. Bonvehi, M. C. Ganaha, A. L. Gurini, G. Daniel Lopardo, L. Cristina, S. Edwardo Prieto, C. G. Rodiguez, R. Augusto Teijeiro, E. Carmen Pallone, D. H. Pryluka, C. A. da Cunha, N. B. da Silva, A. T. de Faria Freire, C. E. Ferreira Starling, J. Costa Fiterman, F. Gongora Rubio, L. Carlos Losso, M. Patelli, J. Souza Lima, P. J. Zimermann Teixeira, M. A. Carmo Moreira, J. C. Abreu de Oliveira, V. Roudas, E. A. Gamal, I. Leschenko, V. A. Rudnov, A. G. Yevdokimova, A. L. Vertkin, Y. M. Ambalov, I. V. Dvoryashina, E. Zilber, R. F. Khamitov, A. N. Galustyan, O. V. Reshetko, V. A. Senior, M. F. Grosan, G. Jimborean, M. Lupse, G. Aron, D. Olteanu, M. Puschita, C. Gavris, V. M. Tudorache, V. Youroukova, M. Petkova, E. Troshanova, M. Dzhabalyan, G. Kavtaradze, M. Makhviladze, R. Tabukashvili, M. Pons, J. Garbino, D. Genne, M. Rothen, J. O. de Saracho, A. Capelastegui, R. Menendez, A. Torres, C. Shum, V. Falco, E. Bouza, J.-P. Bru, B. Misset, B. Megarbane, J. P. Sollet, J.-M. Molina, K. Dalhoff, J. Lorenz, W. Petermann, G. Rohde, C. Schumann, S. Tasci, J. Zerbst, W. Auch-Schwelk, N. Suttorp, R. Henrich, A. Fertl, C. Grohe, C. Jakobeit, K.-M. Deppermann, H. Batura-Gabryel, D. Pupek-Musialik, P. Piotrowicz, C. Marcisz, K. Czarnobilski, R. Jankowska, K. Janik, M. Gutowska-Jablonska, M. Hamankiewicz, J. Kus, A. Rydzewski, J. Dulawa, E. Ziolko, E. Baranska, M. Wendland, E. Trebas-Pietras, I. Tyszkiewic, J. Bonelli, Z. Baliko, M. Bisits, G. Losonczy, Z. Mark, I. Albert, E. Francovszky, K. Fonay, T. Tetiana Pertseva, V. Yefimov, V. Havrysyuk, V. Melnyk, L. Yashyna, N. Monogarova, Y. Kolchyn, R. Dutka, O. Smolyanyi, N. Tryshchuk, I. Kaydashev, V. Rodionova, V. Neyko, I. Chopey, B. Alekniene, G. Kramilius, S. Naudziunas, S. Miliauskas, V. Nausediene, A. Valavicius, M. Mitic-Milikic, D. Celeketic, Z. Lazic, N. Milinic, T. Pejcic, K. Sukles, M. Jaanus, S. Meriste, D. H. A. Ahmad Mahayiddin, A. P. Bin Abdul Muttalif, K. Kuang Kiat, R. Binte, A. Manap, N. A. bt Md Tarekh, T. Anekthananon, P. Mootsikapun, P. Intalapaporn, C. Pothirat, P. Horsin, C. Churchottaworn, A. Wattanathum, A. Dukat, J. Plutinsky
Journal of Antimicrobial Chemotherapy, 2011
Antimicrobial susceptibility and mechanisms of resistance in Shigella and Salmonella isolates from children under five years of age with diarrhea in rural Mozambique
Inácio Mandomando, Dinis Jaintilal, Maria J. Pons, Xavier Vallès, Mateu Espasa, Laura Mensa, Betuel Sigaúque, Sergi Sanz, Jahit Sacarlal, Eusébio Macete, Fátima Abacassamo, Pedro L. Alonso, Joaquim Ruiz
Antimicrobial Agents and Chemotherapy, 2009
Development of Escherichia coli rifaximin-resistant mutants: Frequency of selection and stability
J. Ruiz, L. Mensa, M. J. Pons, J. Vila, J. Gascon
Journal of Antimicrobial Chemotherapy, 2008
In vitro antimicrobial activity of rifaximin against enteropathogens causing traveler's diarrhea
Joaquim Ruiz, Laura Mensa, Cristina O'Callaghan, Maria J. Pons, Ana González, Jordi Vila, Joaquim Gascón
Diagnostic Microbiology and Infectious Disease, 2007

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