Prevalence and antimicrobial resistance profiles of Salmonella species and Escherichia coli isolates from poultry feeds in Ruiru Sub-County, Kenya

Abstract Objectives Contaminated poultry feeds can be a major source of E. coli and Salmonella infections in poultry. This study aimed at determining microbial load, prevalence antimicrobial resistance profiles sp. associated genes among isolates from feeds. Results A total 150 samples different feed types were randomly collected selected sites within Ruiru Sub-County. The load was determined, Escherichia isolated susceptibility test carried out. Antimicrobial also screened the resistant isolates. Out analyzed samples, 58% 28% contained respectively. Bacterial ranged between 3.1 × 10 5 3.0 6 cfu/g. Highest against ampicillin (41%) for (62%) Ampicillin TEM SHV genes. In addition, strB Dfr with streptomycin cotri-moxazole detected. All susceptible to chloramphenicol ciprofloxacin. reveals high bacterial contamination, presence beta-lactamase, aminoglycoside sulphonamide across Therefore, contaminated bacteria are likely lead increase strains community.