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Articles by E.C. Phiri
Total Records ( 1 ) for E.C. Phiri
  G.G. Bakari , R.A. Max , H.R. Mdegela , E.C. Phiri and M.M. Mtambo
  Ethanolic extracts from different morphological parts of the tropical tree, Commiphora swynnertonii were tested against fungi and bacteria using agar well diffusion method. The fungi included Candida albicans and Aspergillus niger whereas the bacteria species included Staphylococcus aureus, Streptococcus pyogenes, Bacillus subtilis, Pseudomonas aeruginosa, Salmonella typhimurium and Escherichia coli. Antimicrobial activity was determined by measuring inhibition zone diameters around agar wells. Among the four tested morphological parts, resin and root bark extracts showed significant activities against S. pyogenes, E. coli and B. subtilis compared to the other two extracts. The growth of E. coli was highly reduced by resin extract (minimum inhibition concentration = 1.9 mg mL-1). The fungi, C. albicans also showed similar sensitivity to resin and root bark extract. Growth of S. typhimurium was not reduced by all four extracts at all concentrations tested whereas that of P. aeruginosa was slightly reduced. Cytotoxicity studies using brine lethality test indicated that root bark, stem bark and resin extract had effect to brine shrimps with LC50 of 3.5, 13.0 and 15.8 μg mL-1, respectively. The current results indicate that resin and root bark extracts of C. swynnertonii have strong antimicrobial activity against most of the tested microbes and support the traditional use of the plant in treating various infectious diseases. Further studies are suggested to validate the use of this plant against the diseases caused by the tested microbes.
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