Abstract
Summary
Phage UC-18 was shown to have a latent period of 35 minutes and a burst size of 7 particles per cell. The phage had an average buoyant density of 1.508 g/cm3 and on electron microscopic examination the head was found to have a regular hexagonal silhouette (60 mμ in diameter) with a tail (165 mμ in length) terminating in a knob-like baseplate with appendages. Antigenically phage UC-18 appears most closely related to the group B staphylococcal phages. Additionally, the phage was markedly sensitive to heat at 45° to 55°C. Comparison of the properties of phage UC-18 with those reported for the basic series of typing phages suggests that UC-18 should be included within the group B phages.
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