Authors : Oluchi Rose Colette Nlemolisa; Ugochi Nneka Kemka; Vivian Kelechi Gaius-Mbalisi; Peter Enoch Odonye; Romanus Chukwudi Nwokorie; Chidimma Onyinye Ikeme; Favour Chinonso Madubugo

Volume/Issue : Volume 11 - 2026, Issue 5 - May

Google Scholar : https://tinyurl.com/4u8nx7ya

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DOI : https://doi.org/10.38124/ijisrt/26May971

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Abstract : Soaps are recognized primarily as cleaning agents due to their antibacterial properties. The antibacterial efficacy of four distinct soaps, specifically a beauty soap, medicated soap, black soap, and local soap, was examined. Standard microbiological procedures, were employed for the identification of the isolates. The disc diffusion assay was employed to investigate the antibacterial efficacy of the soap samples against the isolates at various concentrations: 200 mg/ml, 100 mg/ml, 50 mg/ml, 25 mg/ml, and 12.5 mg/ml. The bacteria were identified as Escherichia coli, Staphylococcus sp., and Bacillus sp. At a concentration of 200 mg/ml, local soap inhibited the growth of all isolates, with the maximum inhibition measuring 31 mm and the minimum inhibition measuring 8.0 mm. At a concentration of 100 mg/ml, black soap and local soap exhibited significant inhibition against all isolates, with the zone of inhibition decreasing as the concentration of the soap samples decreased. Beauty soap shown antibacterial activity at concentrations of 100 mg/ml and 50 mg/ml. The minimum inhibitory concentrations (MIC) for the isolates varied between 12.5 mg/ml and 25 mg/ml, whereas the minimum bactericidal concentrations (MBC) for black soap and local soap were determined to be 50 mg/ml and 25 mg/ml, respectively, against the isolates. Black soap and local soap, exhibiting superior efficacy at low concentrations, may be regarded as effective antibacterial agents for cleansing purposes. The evaluation of antimicrobial efficacy for all four soaps indicated that black soap and Local soap had superior effectiveness against all isolates in comparison to medicated and beauty soap.

Keywords : Medicated, Soap, Organic, Microorganism, Skin.

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