coli O157:H7, Salmonella spp., Enterococcus spp., and Listeria monocytogenes displayed three, five, six, and ten. Enterobacteriaceae from environment showed 100% resistance to novobiocin, erythromycin, and vancomycin E. There was a significant difference ( p < 0.05) in Enterobacteriaceae in goat milk (53.9%) and cow milk (46.2%). Manure had significantly higher ( p < 0.05) Enterobacteriaceae (52.0%) than soil (37.2%), trough water (5.4%), and runoff water (5.4%). A total of 15 different Enterobacteriaceae species were identified from goat and cattle farms. Susceptibility to antibiotics was determined by the Kirby–Bauer disk diffusion technique. A total of 285 environmental and 81 milk samples were analyzed for Enterobacteriaceae by using biochemical and PCR techniques.
The purpose of this study was to investigate the prevalence of pathogenic and commensal bacteria in soil, water, manure, and milk from cattle and goat farms. The use of antibiotics in food animals results to antimicrobial resistant bacteria that complicates the ability to treat infections.
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