Increased Numbers of Heat-Resistnat Spores Produced by Two Strains of Clostridium Perfringens Bearing Temperate Phage s9

J Gen Microbiol. 1977 Nov;103(1):45-50. doi: 10.1099/00221287-103-1-45.


Sporulation kinetics and spore heat resistance data were compared for a lysogenic strain of Clostridium perfringens, s9, before and after curing with ultraviolet irradiation. The cured strain showed the same growth rate in broth media as the lysogenic strain but took 6 h longer to form refractile spores. For lysogenized and cured strains the percentages of refractile spores produced that were heat-resistant (80 degrees C for 15 min) were 50 and 0.2, respectively. When reinfected with the temperature phage, the cured strain produced spores in 2 to 3 h, like the original lysogenic culture, and 10% of the spores produced were heat-resistnat.

MeSH terms

  • Bacteriophages
  • Clostridium perfringens / analysis
  • Clostridium perfringens / physiology*
  • Hot Temperature
  • Lysogeny
  • Picolinic Acids / analysis
  • Spores, Bacterial


  • Picolinic Acids