Faculty of Biotechnology and Food Sciences in Nitra Journal of Microbiology, Biotechnology and Food Sciences 1338-5178 vol. 5 2016 2016-06-01 2016-06-01 SCREENING OF ANTIMICROBIAL, CYTOTOXIC AND PESTICIDAL ACTIVITIES OF COCCINIA GRANDIS (L.) VOIGT 584 588 EN Md. Faruk Hasan Md. Faruk Hasan Biswanath Sikdar Biswanath Sikdar This study was undertaken to assess the antibacterial, antifungal, cytotoxic and pesticidal activities of Coccinia grandis roots extract. The antimicrobial activity was evaluated using disc diffusion method against some pathogenic microorganisms. Cytotoxicity was determined using brine shrimp lethality bioassay method. The plant extract was screened for pesticidal activity towards Sitophilus oryzae adults. Minimum inhibitory concentration (MIC) was also studied against test organisms, using serial dilution technique to determine the antibacterial potency. In antibacterial screening, large inhibition zones were observed against the tested gram-positive (Bacillus subtilis, Sarcina lutea and Stapphylococcus aureus) and gram-negative (Salmonella typhi and Shigella dysenteriae) bacteria. In antifungal screening, the extract showed moderate antifungal activities against the tested fungi (Candida albicans and Colletotrichum falcatum). In cytotoxicity activity test, LC50 (lethal concentration, 50%) of the extract against brine shrimp nauplii was 15.00µg/ml. The plant extract also showed moderate pesticidal activities towards S. oryzae adults. These results suggested that the plant extract has significant antibacterial activity against the tested bacteria, moderate antifungal, cytotoxic and pesticidal activity towards the tested fungi, brine shrimp nauplii and S. oryzae adults, respectively.
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