Otarbayev Bauyrzhan

год рождения 17 ноября 1968 года. Кандидат ветеринарных наук

EDUCATION

высшее образование, окончил Алматинский зоотехнический ветеринарный институт по специальности ветеринарный врач

RESEARCH, TEACHING, or OTHER INTERESTS

Veterinary, Agricultural and Biological Sciences, Animal Science and Zoology, General Agricultural and Biological Sciences

Scopus Publications

Evaluating the Long-Term Effects of Recycled Wastewater Irrigation on Soil Health, Crop Yield, and Ecological Sustainability in Arid Regions
Kulyash Meiramkulova, Aliya Kydyrbekova, Assel Kydyrbekova, Gulnur Daldabayeva, Otarbayev Bauyrzhan, Abzal Shegenbayev, Bostandyk Khalkhabay, Aigul Baikenzheyeva, Perizat Bulanbayeva, Timoth Mkilima
Journal of Ecological Engineering, 2024
Water scarcity poses a significant global challenge, particularly acute in arid and semi-arid regions with limited freshwater resources and high agricultural water demands.This study investigated the impacts of recycled wastewater irrigation using hybrid poplar trees as a model crop in the Kyzylorda region, characterized by extreme climatic conditions and water scarcity.A randomized complete block design (RCBD) was employed to ensure robust comparisons between two irrigation treatments: the control using water from the Syrdarya River, and the experimental treatment involving biologically treated wastewater from the Kyzylorda Wastewater Treatment Plant.Chemical analysis revealed that the soil irrigated with wastewater exhibited higher pH levels (7.5 0.3) compared to the control (7.0 0.2), indicating increased alkalinity.Electrical conductivity, a measure of soil salinity, was significantly elevated in wastewater-irrigated soil (2.3 0.2 dS/m) relative to the control (1.2 0.1 dS/m), reflecting higher salinity levels.Moreover, organic matter content was substantially greater in wastewater-irrigated soil (3.5 0.4%) compared to the control (2.1 0.3%), suggesting enhanced organic enrichment.Nutrient levels, such as nitrogen (45 5 mg/kg), phosphorus (30 4 mg/kg), and potassium (189 16 mg/kg) were markedly higher in the wastewater-irrigated soil compared to the control (27 3 mg/kg, 15 2 mg/kg, and 121 10 mg/kg, respectively), highlighting the nutrient-rich nature of recycled wastewater.Seasonal dynamics in flora and fauna were also assessed.From January to March, both control and wastewaterirrigated plots exhibited a decline in species richness, reflective of winter dormancy.In January, for instance, control plots averaged 23 4 species per square meter, whereas wastewater-irrigated plots had 18 3 species per square meter.Fauna abundance followed a similar pattern, with both groups showing gradual increases from January to March, peaking in summer.The control plots consistently maintained higher fauna abundance levels compared to the wastewater-irrigated plots throughout the study period.Overall, this study provides insights into the complex interactions between recycled wastewater irrigation and soil health, crop performance, and ecological dynamics in arid environments.
Spotted fever group rickettsiae in hard ticks in eastern and southern Kazakhstan
Qiaoyan Dong, Meihua Yang, Fengshi Li, Yuqing Jia, Kadyken Rizabek, Kenesbay Kairullayev, Otarbayev Bauyrzhan, Ketan Adil, Kazkhan Oralhazi, Yuanzhi Wang
Ticks and Tick Borne Diseases, 2023
Infections with spotted fever group rickettsiae represent a worldwide health problem, characterized by persistent high fever, headache, and rash in humans, domestic animals, and wildlife. To date, the occurrence of Rickettsia species in hard ticks has not been thoroughly studied, especially in eastern and southern Kazakhstan. A total of 1,245 adult ticks, comprising 734 Dermacentor marginatus, 219 Hyalomma scupense, 144 Hyalomma asiaticum, 84 Hyalomma marginatum, 48 Rhipicephalus turanicus, and 16 Haemaphysalis erinacei, collected from East Kazakhstan, Abay, Jetsu, Almaty, Jambyl, South Kazakhstan and Qyzylorda oblasts of Kazakhstan, were used to screen rickettsial agents using molecular methods. Rickettsia raoultii, Rickettsia slovaca, Rickettsia aeschlimannii and Rickettsia heilongjiangensis were identified using sequencing, and 31.5% (392/1245) of ticks carried rickettsial agents. The difference in the natural landscapes explains the variety of the collected ticks and expands our knowledge of Rickettsia species and their geographical distribution in Kazakhstan. To the best of our knowledge, this study reports the first finding of R. heilongjiangensis in Kazakhstan.
Sero-epidemiology of the Rhodococcus equi in horses in Eastern Kazakhstan
Kassymov Yerken, Ali Uslu, Otarbayev Bauyev, Zafer Sayın, Asli Balevi, Ismagulov Yerbol, Ilgekbayeva Gulnaz D, Aysegul Ilban, Osman Erganis
Eurasian Journal of Veterinary Sciences, 2023
Amaç: Bu çalışma Doğu Kazakistan'daki yetişkin atlarda Rhodococcus equi (R. equi) sero-prevalansını değerlendirmek için tasarlanmıştır. Gereç ve Yöntem: Eylül ve Kasım 2021 tarihleri arasında doğu Kazakistan’da bulunan üç bölgede (Zhambyl, Almatı, Doğu Kazakistan) 311 attan serum toplandı ve virülent R. equi'ye karşı oluşmuş olan antikorların varlığı enzim bağıntılı immünosorbent test (ELISA) ile tespit edildi. Bulgular: R. equi'nin doğu Kazakistan’da bulunan at popüslayonlarında ki seroprevalansı 2021 yılında %93,6 olarak bulundu. En yüksek seroprevalans Vap A oranı Zhambly Bölgesi'nde (%98,02), en düşük ise Doğu Kazakistan Bölgesi'nde (%88,89) görüldü. Bu bölgeden alınan örnekler toplam örneklerin %69,8'ini oluşturmakta olup, %3,84'ü vapA seronegatiftir. R. equi’nin Doğu Kazakistan'da endemik enfeksiyona sebep olduğu tespit edildi.. Öneri: Bu, R. equi'nin Kazakistan'da epidemiyolojisi hakkında bilgi sağlayan ilk sero survey çalışmasıdır. Serolojik bulgular klinik vakalar ve tay tavlalarında bakteri izolasyonu ile desteklenmelidir. Doğu Kazakistan'da R. equi'ye karşı koruma ve kontrol programları uygulanmalıdır.
The use of RT-PCR in the diagnosis and differentiation of vaccine strains of chicken infectious bronchitis and Newcastle disease
Nigmetulla Assanov, Ryskeldi Bazarbayev, Assilbek Mussoyev, Bauyrzhan Otarbayev, Kairat Iskhan
Open Veterinary Journal, 2023
Background: Infectious diseases of young and adult birds with respiratory syndrome are a significant deterrent to the development of industrial poultry farming due to a decrease in productivity and significant mortality. The only effective method of combating viral diseases is timely and targeted vaccination, which largely depends on laboratory diagnostic results. Aim: The aim of this article is to study the real-time reverse transcription polymerase chain reaction, which has the prospect of more effective diagnosis of vaccine strains of chicken infectious bronchitis and Newcastle disease. Methods: The fastest and most accurate method for the differential diagnosis of pathogens in an associative viral infection is reverse transcription polymerase chain reaction. The method proposed in the article for selecting primers for amplification made it possible to use this method for the simultaneous interspecies differential diagnosis of two or more viral agents, which significantly accelerated their diagnosis. Results: The correlation of the nucleotide sequence obtained as a result of sequencing to a specific strain of the virus is complicated by the lack of a single nomenclature mechanism for separating genetic groups. Conclusion: The results of this study will allow easy and fast typing of sequences into known and databased virus strains, and avoid further confusion in the nomenclature of genetic groups in the future.
Tick distribution and detection of Babesia and Theileria species in Eastern and Southern Kazakhstan
Chunli Sang, Meihua Yang, Bin Xu, Guangyuan Liu, Yicheng Yang, Kenesbay Kairullayev, Otarbayev Bauyrzhan, Wurelihazi Hazihan, Sándor Hornok, Yuanzhi Wang
Ticks and Tick Borne Diseases, 2021
Piroplasmosis is an economically important tick-borne disease worldwide. However, little is known about the presence of Babesia spp. and Theileria spp. in ticks in Eastern and Southern Kazakhstan (ESK). During 2016 - 2019, adult ticks (at 26 sampling sites in 16 districts of 5 oblasts in ESK) were collected. Tick species were identified according to morphological and molecular characteristics. Two fragments (487 bp and 438 bp) of 18S ribosomal RNA (18S rRNA) were used to determine piroplasm species in representative 698 ticks. The genotype characteristics of Babesia caballi and Theileria equi were further analyzed by longer 18S rRNA gene fragments. A total of 6107 adult ticks (4558 parasitizing ticks and 1549 off-host ticks), including 4665 hard ticks and 1442 soft ticks, were collected from their natural hosts (cattle, horses, sheep, camels, shepherd dogs and hedgehogs) and the surrounding environment, respectively. Among the hard tick species, Dermacentor marginatus (62.59%, 2920/4665) was the most abundant, followed by Hyalomma asiaticum (19.36%, 903/4665) and Hyalomma detritum (9.95%, 464/4665). All soft ticks were identified as Argas persicus. 16S ribosomal DNA (16S rDNA) phylogenic analysis showed that several tick species in Kazakhstan, as exemplified by Haemaphysalis erinacei and D. marginatus, clustered together with conspecific ticks reported from China. Five species of piroplasms, i.e. Babesia occultans, Babesia caballi, Theileria ovis, Theileria annulata and Theileria equi, were detected in 698 representative ticks. Genotype E of T. equi in Almaty, and genotype A of B. caballi in Almaty and South Kazakhstan were identified.
Diagnostic effectiveness of serological tests for the detection of brucellosis antibodies
E.I. Kasymov, B.K. Otarbayev, G.D. Ilgekbayeva, I.N. Galymzhan, T.M. Kydyrkhanov
E3s Web of Conferences, 2021
The article reflects the results of testing various diagnostic tests (ST, RA, CFT, BRT, IHA and ELISA) in the diagnosis of brucellosis in cattle, where animals are subjected to serological tests without the use of a vaccine. Antibodies against brucellosis were detected in diagnostic titer in ST in 100% and in ELISA in 96% of cases. The difference between the rates of these reactions was statistically insignificant (P> 0.1). ICA is significantly inferior to these two tests. This difference turned out to be significant, that is, significant (P <0.01). The lowest rates are set for RA, RBT and CFT. For the diagnosis of brucellosis, of all the tests tested, ST and ELISA turned out to be the most sensitive, and of these two tests, the most accessible for practice is ST.