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The given work is devoted to an actual question of modern microbiology-comparative study of cyanophages and characteristics of their interaction with host cells.
Modern microbiologic, physiologic- bio chemical, molecular-biologic and electric- microscopic investigational methods were used in the work and original data possessing fundamental and attached significance were gained.
The most important contribution to modern microbiology is the detection of two new types of cyanophages (N-5TиS-9T), lyzing checkered filamentous and unicellular cultures of cyanobacteria, representatives of Nostoc and Synechococcus family. These cyanophages differ from wel-known cyanophages by their characteristics and have wide distribution in the nature.
As a significant contribution in the sphere of cyanophages we can consider the determination of morphology of virion sizes, determination of the types of nucleic acids, molecular mass, content of GC-pair.
Sensitivity and resistance of virions to some physical-chemical factors were studied, their specificity and parameters of lytic cycle of cyanophages were determined.