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ABSTRACT
Water is indispensable to life and has a substantial effect on public health and living standard. The quality of water is evaluated via, its physical, chemical and biological factors, often affecting it advantageous usage. This study was conducted to evaluate the antibacterial activity of Hunteria umbellata (Osu seed/epicarp) and Garcina kola, Bitter Kola extracts on some bacterial isolates from varied brands of sachet water. Duplicate samples often brands of sachet water were purchased from sales points (outlets) around Ugbowo community, Benin City.Plate count technique was used for bacterial enumeration and isolation. Also, minimum inhibitory and bacterial concentrations were carried out using standard concentrations. Heterotrophic bacterial counts revealed highest range of 3.72±0.50x102cfu/ml in EJuma water and lowest in I-bless water (0.00±0.00 x102cfu/ml), while total coliform counts was highest in EJuma water (3.62±0.30 x102cfu/ml) and lowest in Olivia, I-bless, NOIS and Uniben waters (0.00±0.00 x102cfu/ml).Bacterial isolates identified were; Aeromonas sp., Bacillus sp., Pseudomonas sp., Staphylococcus aereus and Enterobacter sp.The zones of inhibition of Hunteria umbellata epicarp extract and Bitter kola was identified. No zone of inhibition was recorded for Hunteria umbellata (seed) extract. Bitter kola had its greatest bactericidal effect on Enterobacter sp. with a minimum bactericidal concentration of 12.5mg/ml. It was observed that Osu epicarp extract was more effective at inhibiting bacteria activities when compared to Bitter kola extract, meaning it had a higher bacteriostatic effect against bacterialisolates specifically on Bacillus sp. and Staphylococcus sp. This study revealed the potentials of Hunteria umbellata epicarp and Bitter kola as effective natural therapeutic agents against harmful bacteria such as Bacillus sp. and Staphylococcus aureus, thus preventing their pathogenic effect.
