Isolation and Characterization of Streptomyces spp. from Soil Showing Broad Spectrum Antibiotic Activity
2012
Park, S.W., Chungnam National University, Daejeon, Republic of Korea | Bae, T.O., Indiana University, Gary, IN, USA | Kim, S.B., Chungnam National University, Daejeon, Republic of Korea
Three actinobacterial strains exhibiting broad spectrum antibiotic activities were isolated from soil, and characterized. Through the comparative analysis of 16S rRNA genes, the three isolates could be assigned to the genus Streptomyces, as S. tanashiensis, S. nashivillensis, and S. rubiginosohelvolus were found to be the mostly related species, but the strains formed independent phylogenetic lineage. Each strain exhibited different antimicrobial profile against Gram-positive bacteria Bacillus subtilis and Staphylococcus aureus, Gram-negative bacteria Salmonella typhi, Enterobacter cloacae, Serratia marcescens, and Pseudomonas aeruginosa, and also fungi Candida tropicalis and Candida krusei. In addition to the antimicrobial profile, the strains also differed in API ZYM test results, which implies that the three strains might produce difference antimicrobial substances.
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