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Isolation and molecular characterization of multidrug‑resistant Escherichia coli from chicken meat

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Abstract

Antibiotics in animal farms play a significant role in the proliferation and spread of antibiotic-resistant genes (ARGs) and antibiotic-resistant bacteria (ARB). The dissemination of antibiotic resistance from animal facilities to the nearby environment has become an emerging concern. The present study was focused on the isolation and molecular identification of Escherichia coli (E. coli) isolates from broiler chicken meat and further access their antibiotic-resistant profile against different antibiotics. Broiler chicken meat samples were collected from 44 retail poultry slaughter shops in Prayagraj district, Uttar Pradesh, India. Standard bacteriological protocols were followed to first isolate the E. coli, and molecular characterization was performed with genus-specific PCR. Phenotypic and genotypic antibiotic-resistant profiles of all confirmed 154 E. coli isolates were screened against 09 antibiotics using the disc diffusion and PCR-based method for selected resistance genes. In antibiotic sensitivity testing, the isolates have shown maximum resistance potential against tetracycline (78%), ciprofloxacin (57.8%), trimethoprim (54.00%) and erythromycin (49.35%). E. coli bacterial isolates have shown relative resistant to amoxicillin-clavulanic acid (43.00%) and against ampicillin (44.15%). Notably, 64.28% E. coli bacteria were found to be multidrug resistant. The results of PCR assays exposed that tetA and blaTEM genes were the most abundant genes harboured by 83 (84.0%) and 82 (82.0%) out of all 99 targeted E. coli isolates, followed by 48.0% for AmpC (CITM) gene and cmlA (23.00%) for chloramphenicol resistance. It is notable that most of the isolates collected from chicken meat samples were multidrug resistant (> 3 antibiotics), with more than 80% of them carrying tetracycline (tetA) and beta-lactam gene (blaTEM). This study highlights the high risk associated with poultry products due to MDR-E. coli and promote the limited use of antibiotics in poultry farms.

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Acknowledgements

We would like to thank the respective departments and institution for their support in conducting this research.

Funding

The work has been supported by the Uttar Pradesh Council of Agricultural Research, Lucknow, India (15/VT/AH&D/RF/2022).

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PT, JAL and VT were involved in conceptualization; AJ, AK, SS and AKP were involved in methodology; AKP and VT performed validation and VT and RS were involved in writing. All authors have read and agreed to publish.

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Correspondence to Vijay Tripathi.

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The authors have declared no conflict of interest.

Ethical approval

This study was carried out under the permission of the laboratory biosafety guideline from Sam Higginbottom University of Agriculture, Technology and Sciences, Prayagraj, India. Animal ethics approval was taken (IAEC/LAF/SHUATS/PROTOCOL/02) on March 05, 2021.

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Jaiswal, A., Khan, A., Yogi, A. et al. Isolation and molecular characterization of multidrug‑resistant Escherichia coli from chicken meat. 3 Biotech 14, 107 (2024). https://doi.org/10.1007/s13205-024-03950-7

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  • DOI: https://doi.org/10.1007/s13205-024-03950-7

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