Ability of Yersinia enterocolitica cells to inactivate bacteriophage I at 25 degrees and 37 degrees C.

The presence of receptors to bacteriophage I of Y. enterocolitica in Y. enterocolitica cells grown at 37 degrees C was investigated. Protein extracts obtained from bacterial cells (strain 4052) grown at 25 degrees or 37 degrees C produced a diminution of free bacteriophage. Cultures of this strain inactivated phage I at 37 degrees C, and high titre suspensions of this phage showed bacteriocin-like activity. According to these results receptor sites must be present in Y. enterocolitica cells incubated at 37 degrees C.