title: [Persistent properties of microorganisms inhabiting highly mineralized water bodies].
abstract: OBJECTIVE
  Study prevalence and intensity of persistent properties in bacteria inhabiting highly min eralized water bodies and determine their role in interaction with halophilous heterotrophic protozoa.
  
  
  METHODS
  300 bacteria strains and 3 cultures of heterotrophic protozo isolated from water bodies with mineralization of 2-350 g/l were studied. Antilysozyme (ALA) antihistone (AHA) activity of bacteria, protozoa lysozyme were evaluated by dish and photometric methods. Protozoa histones were evaluated cytochemically. Interaction of protozoa and Escherichia coli was evaluated by experimental co-cultivation.
  
  
  RESULTS
  Presence of lysozyme an histones was shown in halophilous heterotrophic protozoa. Prevalence of ALA and AHA in bacteria was shown to increase as water body mineralization decreases. Intensity of E. colielimination from brine was determined to depend on the bacteria ALA level and phagocytic activity of protozoa. Participation of halotolerant protozoa in formation of heterogeneity of bacterial population by ALA was shown.
  
  
  CONCLUSIONS
  In biocenoses of highly mineralized water bodies functioning of lysozyme-antilysozyme, histone-antihistone systems was shown. Bacteria with high persistent potential may impair sanitary parameters of highly mineralized water bodies, process of self-purification of which depends directly on phagocytic activity of protozoa.
authors.forename: E A
authors.initials: EA
authors.lastname: Selivanova
authors.forename: N V
authors.initials: NV
authors.lastname: Nemtseva
mesh_terms: D058448:Biota; D004926:Escherichia coli / Q000502:physiology*; D016822:Euglenida / Q000502:physiology*; D005618:Fresh Water / Q000382:microbiology*; D052836:Heterotrophic Processes; D006657:Histones / Q000032:analysis / Q000037:antagonists & inhibitors; D008903:Minerals / Q000737:chemistry; D009113:Muramidase / Q000032:analysis / Q000037:antagonists & inhibitors; D010586:Phagocytes / Q000502:physiology; D010587:Phagocytosis / Q000502:physiology; D014871:Water Microbiology
chemical_list: D006657:Histones; D008903:Minerals; D009113:Muramidase