Antimicrobial Activity of Medicated Soaps Commonly Used By Dar es Salaam Residents in Tanzania

Department of Pharmaceutical Microbiology, University of Health and Allied Sciences, School of Pharmacy, P. O. Box 65013, Dar es Salaam, Tanzania.
Indian Journal of Pharmaceutical Sciences (Impact Factor: 0.48). 01/2011; 73(1):92-8. DOI: 10.4103/0250-474X.89765
Source: PubMed


An in vitro evaluation of the anti-microbial activity of medicated soaps was conducted using ditch-plate and hand washing techniques. Strains of reference microbes namely Candida albicans (ATCC90028), Staphylococcus aureus (ATCC25923), Pseudomonas aureginosa (ATCC27853) and Escherichia coli (ATCC25922) were tested at three different soaps' concentrations (1.0, 4.0 and 8.0 mg/ml). A total of 16 medicated soaps were assayed for their antimicrobial efficacy. Of these, 13 were medicated and 3 non-medicated soaps, which served as control. Ciprofloxacin and ketaconazole were employed as positive controls. Label disclosure for the soaps' ingredients and other relevant information were absorbed. The most common antimicrobial active ingredients were triclosan, trichloroxylenol and trichlorocarbanilide. ANOVA for means of zones of inhibition revealed variability of antimicrobial activity among the medicated soaps. Positive correlation (r=0.318; P<0.01) between zones of inhibition and soaps' concentrations was evidenced. Hand washing frequencies positively correlated with microbial counts. Roberts(®) soap exhibited the largest zone of inhibition (34 mm) on S. aureus. Candida albicans was the least susceptible microbe. Regency(®) and Dalan(®) exhibited the least zone of inhibition on the tested bacteria. Protex(®), Roberts(®), Family(®) and Protector(®) were equally effective (P<0.01) against S. aureus. In conclusion, majority of the assayed medicated soaps have satisfactory antibacterial activity; though lack antifungal effect with exception of Linda(®) liquid soap. The hand washing technique has proved to be inappropriate for evaluation of soaps' antimicrobial efficacy due to presence of the skin microflora.

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    • "Lifebuoy and Dettol were also reported to have inhibitory effects against E. coli and S. aureus and also against Pseudomonas aeruginosa (Feroze et al., 2014) Majority of the assayed medicated soaps have demonstrated satisfactory effect, particularly the antibacterial activity, hence buttressing the information written on the soap labels that they posses antibacterial activity. This is due to differences in the active antibacterial ingredients and type of formulations used (Nwambete and Lyombe, 2011). However, repeated use of the agents might have caused some resistance as noted in the work. "

    11/2014; 2(6):178-181. DOI:10.12691/ajmr-2-6-3
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    ABSTRACT: Soaps and handwashes labeled as being "antibacterial" can be purchased from any supermarket, but these commercial products rarely mention the antimicrobial spectrum of activity. In the present study, we evaluated six commonly used "antibacterial" handwash solutions and five commonly used antibacterial toilet soaps to evaluate the spectrum of their antimicrobial activity, without assessing the in vivo efficacy.
    08/2014; 5(5):5. DOI:10.4103/2229-5178.137799