Antimicrobial properties of actinomycetes from the soil of Himalaya

Twelve actinomycetes strains were isolated from the soil samples of the Himalaya and screened for their antimicrobial activity. Their cultural characteristics in different culture media were studied. ERIH-44 showed both antibacterial and antifungal activity. The 16S rRNA pattern of ERIH-44 strongly...

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Published inJournal de mycologie médicale Vol. 20; no. 1; pp. 15 - 20
Main Authors Duraipandiyan, V., Sasi, A.H., Islam, V.I.H., Valanarasu, M., Ignacimuthu, S.
Format Journal Article
LanguageEnglish
French
Published Paris Elsevier SAS 01.03.2010
Masson
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Summary:Twelve actinomycetes strains were isolated from the soil samples of the Himalaya and screened for their antimicrobial activity. Their cultural characteristics in different culture media were studied. ERIH-44 showed both antibacterial and antifungal activity. The 16S rRNA pattern of ERIH-44 strongly suggested that it belongs to the genus Bacillus. The morphological and physiological characters were also recorded. ERIH-44 had the ability to produce amylase. The antimicrobial activity was assessed using broth microdilution technique. The ethyl acetate extract of ERIH-44 was tested against bacteria and fungi, and showed the following MIC values: Bacillus subtilis (< 15.62 μg/ml), Staphylococcus aureus (< 15.62 μg/ml), Escherichia coli (125 μg/ml) and Pseudomonas aeruginosa (500 μg/ml), Botrytis cinerea (500 μg/ml) and Trichophyton mentagrophytes (1000 μg/ml). Douze souches d’actinomycètes ont été isolées dans des échantillons de sol de l’Himalaya et testées pour leur activité antimicrobienne. Leurs caractéristiques de culture ont été étudiées sur différents milieux. La souche ERIH-44 a montré une activité antibactérienne et antifongique. Le profil de l’ARNr 16S d’ERIH-44 a fortement suggéré qu’il appartient au genre Bacillus. Les caractères morphologiques et physiologiques ont été également étudiés. La souche ERIH-44 a la capacité de produire de l’amylase. L’activité antimicrobienne a été évaluée en utilisant la technique de microdilution en bouillon. L’extrait à l’acétate d’éthylique d’ERIH-44 a été testé contre des bactéries et des champignons qui ont montré les valeurs de concentration minimale inhibitrice suivantes : Bacillus subtilis (< 15,62 μg/ml), Staphylococcus aureus (< 15,62 μg/ml), Escherichia coli (125 μg/ml), Pseudomonas aeruginosa (500 μg/ml), Botrytis cinerea (500 μg/ml) et Trichophyton mentagrophytes (1000 μg/ml).
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ISSN:1156-5233
1773-0449
DOI:10.1016/j.mycmed.2009.11.002