Ultrastructure des phages de lysotypie des Escherichia coli 0127 :B8

Abstract

The nine typing phages of the enteropathogenic E. coli 0127:B8 have been studied by negative staining. They represent five morphological types. The phages 3, 7, and 9 possess tails with contractile sheath and belong to the group A of Bradley. Phages 2, 4, 5, and 6 have long tails without sheath (group B). Phages 1 and 8 show short tails of only 190 Å length (group C). Groups A and B include both phages with elongated heads (phages 3 and 5) and isometric heads. All isometric heads are octahedra. Phage 3 resembles T-even phages.