Detection and antibiogram profile of diarrheagenic Escherichia coli isolated from two abattoir settings in northwest Ethiopia: a one health perspective.
Journal Article
Solomon Lulie Abey1* , Mersha Teka1, Abebe Belete Bitew2 , Wassie Molla2, Mebrat Ejo3, Gashaw Getaneh Dagnaw4 , Takele Adugna5, Seleshe Nigatu2, Bemrew Admassu Mengistu4, Mebrie Zemene Kinde4, Adugna Berju2, Mequanint Addisu Belete6,7 , Wudu Temesgen2,8, Shimelis Dagnachew1 and Tesfaye Sisay Tesema6
Submitted: May 06, 2024
Agriculture and Natural resources
Veterinary laboratory Technology
Abstract Preview:
Background Diarrheagenic Escherichia coli (E. coli) is a zoonotic pathogen that contaminates abattoir workers,slaughter environments, slaughter equipment, and carcasses during abattoir processing. Infection with E. coliis associated with the consumption of contaminated food and water, and it is a potential threat to the healthand welfare of both humans and animals. Hence, this study aimed to detect diarrheagenic E. coli and assess itsantibiogram profile in two abattoir settings, in one health lens.Methods A cross-sectional study in one health approach was conducted from December 2020 to June 2021. Atotal of 384 samples from abattoir workers’ hands, carcasses, knives, cattle feces, abattoir water and effluents werecollected. Bacterial culture and biochemical tests were conducted to isolate E. coli, while conventional polymerasechain reaction was performed to identify virulence genes. The antibiogram of diarrheagenic E. coli was tested againstnine antimicrobials using the Kirby Bauer disk diffusion method.Results A total of 115 (29.95%) E. coli were isolated from the 384 samples, and from these isolates, about 17 (14.8%)were confirmed to be diarrheagenic E. coli (DEC). Among the DEC pathotypes, nine (52.94%), five (29.4%), and three(17.65%) were Shiga toxin-producing, enterohemorrhagic, and enterotoxigenic E. coli, respectively. While 14 (82.35%)DEC isolates harbored the stx2 gene, five (29.41%) the eae gene, five (29.41%) the hlyA gene and three (17.65%)harbored the st gene. All the DEC isolates were resistant to erythromycin and vancomycin; whereas, they weresusceptible to ampicillin, nalidixic acid and norfloxacin. Furthermore, 64.7% of DEC isolates showed resistance to bothceftazidime and kanamycin and 88.24% of the isolates showed multidrug resistance.Conclusion This study detected DEC isolates having different virulence genes, which showed single and multipleantimicrobial resistance. Given the existing poor hygienic and sanitary practices along the abattoir-to-table food
chain, coupled with the habit of raw meat consumption, this result indicates a potential public and animal health riskfrom the pathogen and antimicrobial resistance.Keywords Abattoir setting, Antibiogram profile, Carcasses, Diarrheagenic E. Coli, Virulence genes
Full Abstract:
Background Diarrheagenic Escherichia coli (E. coli) is a zoonotic pathogen that contaminates abattoir workers,slaughter environments, slaughter equipment, and carcasses during abattoir processing. Infection with E. coliis associated with the consumption of contaminated food and water, and it is a potential threat to the healthand welfare of both humans and animals. Hence, this study aimed to detect diarrheagenic E. coli and assess itsantibiogram profile in two abattoir settings, in one health lens.Methods A cross-sectional study in one health approach was conducted from December 2020 to June 2021. Atotal of 384 samples from abattoir workers’ hands, carcasses, knives, cattle feces, abattoir water and effluents werecollected. Bacterial culture and biochemical tests were conducted to isolate E. coli, while conventional polymerasechain reaction was performed to identify virulence genes. The antibiogram of diarrheagenic E. coli was tested againstnine antimicrobials using the Kirby Bauer disk diffusion method.Results A total of 115 (29.95%) E. coli were isolated from the 384 samples, and from these isolates, about 17 (14.8%)were confirmed to be diarrheagenic E. coli (DEC). Among the DEC pathotypes, nine (52.94%), five (29.4%), and three(17.65%) were Shiga toxin-producing, enterohemorrhagic, and enterotoxigenic E. coli, respectively. While 14 (82.35%)DEC isolates harbored the stx2 gene, five (29.41%) the eae gene, five (29.41%) the hlyA gene and three (17.65%)harbored the st gene. All the DEC isolates were resistant to erythromycin and vancomycin; whereas, they weresusceptible to ampicillin, nalidixic acid and norfloxacin. Furthermore, 64.7% of DEC isolates showed resistance to bothceftazidime and kanamycin and 88.24% of the isolates showed multidrug resistance.Conclusion This study detected DEC isolates having different virulence genes, which showed single and multipleantimicrobial resistance. Given the existing poor hygienic and sanitary practices along the abattoir-to-table food
chain, coupled with the habit of raw meat consumption, this result indicates a potential public and animal health riskfrom the pathogen and antimicrobial resistance.Keywords Abattoir setting, Antibiogram profile, Carcasses, Diarrheagenic E. Coli, Virulence genes