| Autor: |
Metsebing BP; Mycological Laboratory, University of Yaoundé 1, B.P. 1456 Yaoundé, Cameroon; Department of Biotechnology and Food Technology, University of Johannesburg, P. O. Box 17011, Doornfontein Campus 2028, South Africa; Department of Chemical Sciences, University of Johannesburg, P. O. Box 17011, Doornfontein Campus 2028, South Africa., Oba R; Mycological Laboratory, University of Yaoundé 1, B.P. 1456 Yaoundé, Cameroon; Department of Biotechnology and Food Technology, University of Johannesburg, P. O. Box 17011, Doornfontein Campus 2028, South Africa; Department of Chemical Sciences, University of Johannesburg, P. O. Box 17011, Doornfontein Campus 2028, South Africa., Mossebo DC; Mycological Laboratory, University of Yaoundé 1, B.P. 1456 Yaoundé, Cameroon., Fonkui TY; Department of Biotechnology and Food Technology, University of Johannesburg, P. O. Box 17011, Doornfontein Campus 2028, South Africa., Tsigain FT; Mycological Laboratory, University of Yaoundé 1, B.P. 1456 Yaoundé, Cameroon., Fotsing MCD; Department of Chemical Sciences, University of Johannesburg, P. O. Box 17011, Doornfontein Campus 2028, South Africa., Mungoh TC; Department of Chemical Sciences, University of Johannesburg, P. O. Box 17011, Doornfontein Campus 2028, South Africa., Ndinteh DN; Department of Chemical Sciences, University of Johannesburg, P. O. Box 17011, Doornfontein Campus 2028, South Africa. |
| Abstrakt: |
Antifungal and antibacterial activities of crude extracts of carpophore compared with those of sclerotium of Pleurotus tuber-regium were investigated on 11 species of bacterial and 3 fungal human pathogens. The minimal inhibitory concentration (MIC) of carpophore extract was recorded to be 12.5 mg/mL on Bacillus subtilis, Enterococcus faecalis, Staphylococcus epidermidis, Escherichia cloacae, Proteus mirabilis, P. vulgaris, Klebsiella oxytoca, and K. aerogenes and 6.25 mg/mL on Staphylococcus aureus, Escherichia coli, and Mycobacterium smegmatis as well as on all three species of fungal pathogens including Candida albicans, Aspergillus fumigatus, and A. ochraceus. In comparison, the MIC of sclerotium was recorded to be 12.5 mg/mL on Bacillus subtilis and Klebsiella aerogenes; 6.25 mg/mL on Enterococcus faecalis, Staphylococcus aureus, S. epidermidis, Enterobacter cloacae, E. coli, Mycobacterium smegmatis, Proteus mirabilis, P. vulgaris, and Klebsiella oxytoca; and 3.13 mg/mL on the three fungal pathogens. Based on the abovementioned figures, it appears that strains of pathogenic fungi tested are much more sensitive to crude extracts than the abovementioned bacteria. In fact, antimicrobial activities of crude extracts of P. tuber-regium, no matter whether it is that of the carpophore or its sclerotium, are in general stronger on human pathogenic fungi than bacteria. These figures also demonstrate that crude extracts of sclerotium show a higher antimicrobial activity than that of carpophore. Carpophores and sclerotia of P. tuber-regium could therefore constitute a source of new molecules potentially more efficient than synthetic products against some human pathogenic fungi and bacteria. |
