Abstract
Water is essential to life. The existence of all forms of life is dependent on an adequate water supply. The exigent need for water supply in homes prompted the construction of water sources and water storage devices in the homes. This however does not guarantee that the water is safe to drink. If the water is safe at the source, it may be contaminated during transportation storage and drawing at home. This study was carried out to determine the microbial counts, antibiotics susceptibility and plasmid profile of bacteria isolates from household water distribution tanks in the Ado-Ekiti metropolis. The total bacteria and coliform counts were determined using the pour plating technique. The antibiotic susceptibility pattern of the isolates was determined using the disc diffusion technique while the plasmid profile of the isolates was determined using the alkaline lysis method and agar gel electrophoresis. The mean total bacteria count of the water sample was 6.96 log10 CFU/ml, while the mean total of coliform count is 5.50 log10CFU/ml. The isolates with multiple antibiotics resistance belonged to five bacteria genera namely: Escherichia, Pseudomonas, Klebsiella, Enterobacter and Proteus. The plasmid analysis showed that four of the resistant strains had multiple plasmids, Enterobacter aerogens had 3 plasmids (1kb, 1.5kb and 2kb), Pseudomonas aeruginosa and Klebsiella aerogens had two plasmids (1kb, 1.5kb) respectively while Proteus vulgaris and Escherichia coli had no plasmid.
Highlights
Water is the most essential commodity for human consumption
The numerous reports about the occurrence of pathogenic microorganisms in drinking water, their ability to resist antibiotics and associated diseases prompted this study, to access the microbial quality of water in storage tanks which serve as drinking and other domestic purpose for majority of homes in Ado-Ekiti
Total bacteria and total coliform count of all the water samples analyzed in this study revealed high microbial contamination of the water (Table 2)
Summary
Adequate supply of potable water is essential for the well-being of all people around the world[1, 2] Human activities such as agriculture, trading, industries cannot function properly without adequate water supply. Due to the inevitable importance of water and scarcity especially during dry season, they store water in buckets, drums, basins and tanks for easy accessibility. Water from these sources have been reported to contain certain pathogens and other contaminants which compromise the aesthetic and microbial quality of the water[5, 6, 7]
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