The bacteriophage, designated ST1, had a broad host range and was stable at the temperature
up to 60°C for 3 min and over a wide pH range (5 to 11).Its genome was double stranded
DNA. Transmission electron microscopy revealed that the bacteriophage had an isometric
head of 70 nm in diameter and a long noncontractile tail of 150 nm long and 7 nm wide.