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In a comprehensive study conducted across various waste sites in Anyigba, Kogi State, Nigeria, the antimicrobial susceptibility patterns of isolated bacteria were elucidated. The investigation targeted three distinct waste sites: a medical dump site, a mechanic dump site, and an agricultural dump site, where the prevalence and resistance profiles of bacteria were closely monitored to understand their ecological impact and potential public health concerns. The study identified six bacterial species with diverse colonial morphology and biochemical characteristics. These included Salmonella sp., Bacillus sp., Pseudomonas sp., Micrococcus sp., and Enterobacter sp. Antimicrobial susceptibility testing revealed a complex pattern of resistance and susceptibility to various antibiotics. Pseudomonas sp. and Salmonella sp. showed a high degree of resistance to sulfamethoxazole and chloramphenicol, while being sensitive to cephalothin and ceftriaxone. Bacillus sp. isolates were particularly susceptible to ciprofloxacin and amikacin, but resistant to sulfamethoxazole and chloramphenicol. Micrococcus sp. exhibited broad susceptibility to multiple antibiotics, including chloramphenicol, ceftriaxone and sulfamethoxazole. Enterobacter sp. was sensitive to sulfisoxazole and nitrofurantoin, while Salmonella sp. showed sensitivity to cefepime and amoxicillin-clavulanate. These findings highlight the urgent need for a better understanding of antimicrobial resistance patterns among bacteria in waste environments. The results contribute to the knowledge base on environmental microbiology and suggest a need for stricter waste management practices to prevent the spread of antibiotic-resistant bacteria, which pose a significant threat to public health.
Zakari David Adeiza (Mon,) studied this question.