Effect of biosurfactants Acinetobacter calcoaceticus K-4 and Rhodococcus erythropolis EK-1 on some microorganisms

• Published in: Mikrobiolohichnyĭ zhurnal (Kiev, Ukraine : 1993) Vol. 73; no. 3; p. 14
• Main Authors: Pirog, T P, Konon, A D, Sofilkanich, A P, Skochko, A B
• Format: Journal Article
• Language: Ukrainian
• Published: Ukraine 01-05-2011
• Subjects: Acinetobacter calcoaceticus - chemistry; Anti-Bacterial Agents - pharmacology; Antifungal Agents - pharmacology; Microbial Sensitivity Tests; Rhodococcus - chemistry; Surface-Active Agents - pharmacology
• ISSN: 1028-0987

It has been established that the preparations of biosurfactants Rhodococcus erythropolis EK-1 (0.61 -2.1 mg/ml) and Acinetobacter calcoaceticus K-4 (0.15 - 0.22 mg/ml) in a form of supernatants of the cultural liquid show antimicrobial effect in respect of a number of microorganisms (Bacillus subtilis BT-2, Escherichia coli IEM-1, Candida tropicalis BT-5, Candida albicans D6, Candida utilis BVC-65, Saccharomyces cerevisiae OB-3). No inhibiting effect of biosurfactant preparations of R. erythropolis EK-1 on the cells of S. cerevisiae OB-3 and E. coli IEM-I and antifungal effect of the both studied surfactants on Aspergillus niger P-3 and Fusarium culmorum T-7 were revealed. The survival of microbe cells depend on biosurfactants concentration in the preparations, on exposure time as well as on physiological state of test-cultures. It has been established that the surfactant preparations of A. calcoaceticus K-4 had a higher effect on the spores of B. subtilis BT-2, than on vegetative cells, thus decreasing the spore culture survival by 75% in 2 h of exposure.