Antimicrobial resistance status of selected bacteria isolated from animal source foods and feed in Ethiopia

Antimicrobial resistance (AMR) of major food-borne pathogens has become an increasing public health problem worldwide. A cross-sectional study was conducted from August 2019 to July 2021 in high-potential meat and dairy products and commercial animal feed supply chain areas of Ethiopia. The objectives of the study was assessing AMR profile of target bacterial pathogens isolated from animal sources foods (ASFs) and feed. A total of 642 ASFs and feed samples collected from selected sampling sites were examined at the microbiology laboratory of animal products, veterinary drugs, and feed quality assessment center. Bacterial identification and antimicrobial susceptibility test (AST) were conducted using an automated Vitek 2 XL compact system. Out of 642 investigated samples, 24 different genera and 59 species of bacteria were identified. A total of 185 samples were positive for target bacteria of Staphylococcus aureus, Escherichia coli, and Salmonella Species. The AST results showed AMR of target bacteria isolates against some of the tested antimicrobials. Of these, 83%, 55%, and 92% isolates of Staphylococcus aureus, Escherichia coli, and Salmonella Species, showed high level of AMR to Benzylpenicillin, Tetracycline, and Cefalexin/Gentamicin, respectively. The target bacteria isolated from ASFs and feed demonstrated multidrug resistance against some of the tested antimicrobials having public and veterinary importance. This reflects that ASFs and feed could serve as one of the sources for the spread and transmission of antimicrobial-resistant bacterial pathogens. Hence, there is a need for improving hygiene and sanitation practices along the ASFs and feed supply chains. Besides raising community awareness about the risks of AMR, emphasis on the rational use of antimicrobials in animal health practice and further investigations on AMR are recommended.