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ABSTRACT
The research was carried out to evaluate the risk assessment of Escherichia coli and Salmonella sp. of abattoir waste water after sedimentation. Standard bacteriological methods were used to enumerate the total bacterial count of the abattoir wastewater using pour plate methods after serial dilution. The bacterial isolates were characterized and identified using morphological and biochemical methods and sugar fermentation test. The percentage distribution and frequency of the isolates were evaluated using statistical method. From the result obtained abattoir waste water was highly contaminated with Escherichia coli and Salmonella spp with cfu/ml ranging from 8.5 x 104 - 15.0 x 104 and 9.0 x 104 - 14.5 x 104 cfu/ml respectively. Following the cultural, morphological and biochemical test result, three salmonella spp and two Escherichia coli spp was found to be present. The antibiotic sensitivity test revealed that all the isolates were multiple antibiotic resistant with the resistance index ranging from 0.5 - 0.625 as against the World Health Organization (WHO) recommendation of 0.2. Abattoir effluents needs to be treated properly before being released to the environment to avoid disease out-break and public health hazard.
