[Allomonads--a new group of microorganisms of the family Vibrionaceae. V. Taxonomic position of the allomonads based on a study of their DNA].

The DNA of Allomonas, a new group of microorganisms, has been studied to determine the taxonomic status of this group. In the nucleotide composition of the DNA of a typical representative of this group 57.4 mol % G + C have been revealed, which permits to sharply differentiate Allomonas from vibrios and Plesiomonas. A relatively low level of similarity between the DNA of Allomonas and that of other representatives of the family Vibrionaceae has been determined by the method of molecular DNA hybridization (6-18% of homologies), this level being approximately the same in vibrios, Plesiomonas and Aeromonas. These data indicate the necessity of regarding Allomonas as a separate genus of the family Vibrionaceae.