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Attachment of the cells of some bacteria, yeasts, and micromycetes to various surfaces (catheters, dentures, plastic, polyvinyl chloride, tiles, and steel) treated with the surfactants from Acinetobacter calcoace ticus IMB B 7241, Rhodococcus erythropolis IMB Ac 5017, and Nocardia vaccinii IMB B 7405 was studied. Adhesion of microorganisms to all the studied surfaces depended on the surfactant concentration and purity, kind of surface, and the test culture. Treatment with the surfactants from N. vaccinii IMB B 7405 (0.005-0.05 mg/mL), A. calcoaceticus IMB B 7241 (0.003-0.036 mg/mL), and R. erythropolis IMB Ac 5017 (0.03-0.12 mg/mL) resulted in adhesion decreased respectively by 35-75, 60-75, and 25-90% for bacteria (Escherichia coli IEM 1, Bacillus subtilis BT 2, etc.), by 80-85, 55−90, and 15-60% for yeasts Candida albi cans D 6, and by 40-50, 35-35, and 10-20% for micromycetes (Aspergillus niger P 3 and Fusarium cul morum T 7).

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The effect of surface-active substances (SAS's) of Acinetobacter calcoaceticus IMV B-7241, Rhodococcus erythropolis IMV Ac-5017, and Nocardia vaccinii K-8 on phytopathogenic bacteria has been studied. It was shown that the survival of cells (10(5)-10(7) in a milliliter) of the Pseudomonas and Xanthomonas phytopathogenic bacteria was found to be 0-33% after treatment with SAS preparations of the IMV Ac-5017 and IMV B-7241 strains for 2 h (0.15-0.4 mg/mL). In the presence of N. vaccinii K-8 SAS preparations (0.085-0.85 mg/mL), the number of cells of the majority of the studied phytopathogenic bacteria decreased by 95-100%. These data show prospects for using microbial SAS's for the construction of ecologically friendly drugs for regulating the number of phytopathogenic bacteria.