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Unravelling Antimicrobial Resistance Phenotypes and Carriage of Extended-Spectrum β-Lactamase Genes in Escherichia coli Isolated from Dairy Farms in Kiambu County, Kenya

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Advances in Microbiology 2022年第5期12卷 295-315页

作者： Dan Waithiru John Mwaniki Njeru John M. Maingi Erastus Mulinge Benjamin Ngugi John Maina John Kiiru Department of Biochemistry Biotechnology & Microbiology Kenyatta University Nairobi Kenya Centre for Microbiology Research Kenya Medical Research Institute Nairobi Kenya

The use of antibiotics for prophylaxis and growth enhancement in livestock farming is on the increase globally. This practice has led to the emergence and spread of antimicrobial-resistant bacteria in livestock. Only limited research has been done to establish the role of cattle farming in antimicrobial resistance. The current study sought to establish the carriage of multi-drug resistance and extended-spectrum beta-lactamase genes in Escherichia coli from farmers, their cattle, and cattle slurry within Kiambu County. A total of 286 (81%) E. coli isolates were recovered from 352 samples analysed. Antibiotic resistance profiles showed 114 (40%) isolates were resistant to ≥3 antimicrobial classes and were considered multidrug-resistant. Among multidrug-resistant (MDR) E. coli strains, 40 (14%) were resistant to 3 different antimicrobial classes, while 71 (25%) were resistant to between 4 and 7 antibiotic classes. Extended-spectrum β-lactamase resistance was found in 18 isolates: human (n = 14), cattle (n = 2), and environmental (n = 2). Both the blaCTX-M and blaTEM genes were detected in 10 and 15 strains, respectively. Sequence analysis showed that the isolates carried the blaTEM-116 (n = 7), blaTEM-1 (n = 5), and blaCTX-M-15 (n = 8) genes. Genotyping MDR isolates using (GTG) 5 PCR demonstrated that the isolates were not clonal. This data shows antimicrobial resistance profiles and different types of resistance genes in the E. coli population on dairy farms. As a result, more effective, targeted public health policies and measures need to be put in place to control and prevent the emergence and spread of resistant bacteria.

关键词： Humans cattle slurry Escherichia coli Multidrug Resistance Extended-Spectrum β-Lactamase (ESBL) TEM 116 CTX-M-15 Kenya

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Productivity and Nutritive Values of Sorghum×Sudan Hybrid（SSH） Under SSH-Based Double Cropping Systems in Paddy Land 3rd

Productivity and Nutritive Values of Sorghum×Sudan Hybrid（...

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The 3rd Korea-China-Japan Joint Symposium on Grassland Agriculture and Livestock Production

作者： Nam Chul Jo Ki Choon Choi Sang Pil Na Chang Yoon Wan Bang Yook National Institute of Animal Science RDASeonghwan-EupCheonan-SiChungnam 330-801 Korea College of Animal Bioscience and Technology Konkuk University Dept.of Animal Resources and Biotechnology Chonbuk National University

＜正＞This study was carried out to investigate the productivity and nutritive values of SSH under Double-cropping SSH followed by whole crop barley（SSFWB） or by Hairy vetch（SSFHV） in paddy land.A field study was conducted at Baeksan-myeon,Kimje,Jeonbuk province in Korea on clay loam soil for 3 *** plots were arranged in completely randomized design with three *** yield of SSH in SSFWB treatment was higher than that of SSFHV（P＜0.05）.All nutrients values of SSH were not influenced by the cropping ***,all nutrients of SSH in SSFWB treatment were just a little increase,compared with those of SSFHV.

关键词： cattle slurry Cropping system Sorghum x Sudan hybrid Hairy vetch Nutritive value

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Properties of Soil and Leaching Water Under Sorghum×Sudan Hybrid-Based Double Cropping Systems in Paddy Land

Properties of Soil and Leaching Water Under Sorghum×Sudan H...

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The 3rd Korea-China-Japan Joint Symposium on Grassland Agriculture and Livestock Production

作者： Nam Chul Jo Ki Choon Choi Sang Pil Na Chang Yoon Yang Seung Hak Wan Bang Yook National Institute of Animal Science RDASeonghwan-EupCheonan-SiChungnam 330-801 Korea College of Animal Bioscience and Technology Konkuk University Dept.of Animal Resources and Biotechnology Chonbuk National University

This study was carried out to investigate the properties of soil and water under Double-cropping SSH followed by whole crop barley(SSFWB) or by Hairy vetch(SSFHV) in paddy land.A field study was conducted at Baeksan-myeon,Kimje,Jeonbuk province in Korea on clay loam soil for 3 *** plots were arranged in completely randomized design with three *** pH and the contents of T-N and organic matter (OM) in soil samples collected at the end of the experiment were remarkably higher than those at the beginning of the experiment in both SSFWB and SSFHV treatment(P<0.05).The contents of an exchangeable cations at the end of the experiment were remarkably higher than those at the beginning of the experiment in both SSFWB and SSFHV (P<0.05).And then,the concentration of NO-N,NH-N and PO-P in discharge and leaching water were not influenced by the cropping system

关键词： cattle slurry Sorghum x Sudan hybrid Hairy vetch Soil properties Leaching water

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