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Characterization of Escherichia coli Prevalence and Antibiotic Resistance in Abattoir Wastewaters in Calabar South, Nigeria

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Agashi C. A., Ita P. E., Daudu E. S., Bankong G. T., Olaleye A. M., Obuo A. U., Ikpang I. A.

World News of Natural Sciences

2025

vol. 59

44-57

Wastewaters are considered hotspots for antibiotic resistant bacteria and horizontal gene transfer among related and unrelated bacterial species. This study investigated the prevalence and antibiotic susceptibility pattern of Escherichia coli isolated from abattoir wastewaters in Calabar South, Nigeria. Seven hundred wastewater samples from three abattoirs: Uwanse (300), Mount Zion (250) and Amika Utuk (150) samples were analyzed. Standard microbiological procedures were followed in isolation and identification of the E. coli isolates. The antibiotic susceptibility test was done using the Kirby Bauer disk diffusion method. The results showed high prevalence of E. coli in the three abattoir locations; 202(67.3%) from Uwanse, 154 (61.6%) from Mount Zion and 81 (54%) from Amika Utuk. The antibiogram showed that the E. coli isolates were highly sensitive to Ofloxacin followed by Gentamicin in Uwanse (87.1% and 54.5%), Mount Zion (95.5% and 60.4%) and Amika Utuk (92.6% and 64.2%) respectively. The E. coli isolates were highly resistant to Ampicillin and Augumentin with both interchangeably topping the list in the three locations. Most isolates had Multiple Antibiotic Resistance (MAR) index greater than (>0.2). This result shows that the isolates are a public health threat since their contact with the environment might cause the spread of multidrug resistance organisms.

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1 World News of Natural Sciences

1 2025

1 Agashi C. A.

1 Bankong G. T.

1 Daudu E. S.

1 Ikpang I. A.

1 Ita P. E.

1 Obuo A. U.

1 Olaleye A. M.

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Characterization of Escherichia coli Prevalence and Antibiotic Resistance in Abattoir Wastewaters in Calabar South, Nigeria