Persistent properties of protozoa-associated bacteria

The species structure and persistent properties (antilysozyme and antihistone activity) of bacteria forming associations with protozoa is revealed. Among them, 68.9% of the isolates were enterobacteria, the remaining organisms belonged to the families Aeromonas, Alcaligenes, Pseudomonas, Vibrio, etc. Within the family Enterobacteriaceae bacteria of the Escherichia group prevailed. 50.4% of the isolates were found to have antilysozyme activity and 97%--antihistone activity. The level of persistent properties in the representatives of allochthonous microflora was higher than that in the representatives of autochthonous microflora. In addition to antilysozyme activity antihistone activity was noted in protozoa-associated bacteria, which could be of importance for the formation of symbiotic links in natural associations. These data may be used in sanitary and hygienic practice for microecological monitoring of the environment.