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Dermal Application Of Lactic Acid Based Cream Of A Non Pathogenic Kocuria Marina (BMKO1) Strain Against Epidermophyton Floccosum (MTCC 613) Symptomatic Excision Mice Model

Soumya S Dash, Smaranika Pattnaik

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The aim of this study was to evaluate the antifungal efficacy of Kocuria marina (BMKo1) derived Lactic acid against Epidermophyton floccosum (MTCC-613) infections induced on male Swiss Albino mice model (Mus musculus).  For this purpose, the isolated strain was subjected to ‘flask fermentation’ and the Lactic acid produced as fermentation product, was quantified and analysed. Prior to preclinical test, healthy mice models of approximately 8 weeks old and 25-30 gm (weight) were subjected to intra-dermal administration for a period of 15 days to test for toxicity. Mortality, clinical signs, body weight changes were continually monitored. Then the mouse models were inoculated with 100 µl/ml (V/V) of E. floccosum (MTCC-613) spore suspensions following ‘Excision model’. After induction of the infection, the symptomatic mice groups were subjected to topical application of Kocuria lactic acid cream based formulation at a concentration of 1µl/ml (V/V). The naked eye observations were made on the infected lesions till the absolute deduction of infection of excised skin surfaces. The degrees of deduction of infection were converted into scores and the percentages (%) of deduction of infection were calculated and the average value was derived. There were inclusion of positive control (Fluconazole) and negative control (group with infection induced excision, but without any drug application) mice groups for the sake of comparison. Further, with absolute deduction of infection score observed in mice group, applied with Kocuria derived Lactic acid was akin to Fluconazole activity. However, the infection induced mice group was found to be with substantial increase of degree of infection. This study have curtain raised about the anti Epidermophyton infection activity of a cream based  Cell free Lactic acid derived from a non pathogenic strain of Kocuria marina on mouse models. Keywords: Kocuria marina, Epidermophyton floccosum, Lactic acid