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J Virol. 1970 Jul;6(1):94-9.

Isolation and characterization of a bacteriophage for Vibrio fetus.


Bacteriophages were isolated from 22 of 38 strains of Vibrio fetus by an enrichment process, utilizing the donor and host strains growing together in fluid thioglycollate medium. One phage, V-45, isolated by the conventional lawn-spot method, was characterized by stability in broth, growth kinetics, and morphology. It was sensitive to rapid thermal inactivation, chloroform, and pH values above 6.5. Calcium was required for phage replication and stability in broth. Magnesium provided the best protection against thermal inactivation at 50 C in the pH range of 6.5 to 7.5. The minimum latent period was 135 min, rise time was 75 min, and average burst size was 35 plaque-forming units per infected cell. Phage V-45 resembled Bradley's morphological group B, having a long tail without contractile sheath. Dimensions were: head, about 50 nm; tail, about 7 by 240 nm; and tail lumen, 2 to 3 nm.

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