Table 2.

Heat resistance of spores produced bycpe-positive C. perfringens isolatesa

IsolateOriginDvalue at 100°C (min)
Food poisoning isolates carrying a chromosomal cpe geneb
 NCTC 8239Europe, 1950s124
 191-10United States, 1990s67
 FD1041United States, 1980s32
 E13United States, 1960s30
 NCTC 10239Europe, 1950s45
 Avgc60.0 ± 18
Isolates carrying a plasmid cpe gene
 F5603Humans, Europe, 1980s0.6
 F4969Humans, Europe, 1980s0.5
 NB16Humans, Europe, 1980s1.9
 B40Humans, Europe, 1980s1.6
 222Veterinary, United States, 1990s0.9
 153Veterinary, United States, 1990s1.3
 458Veterinary, United States, 1990s0.5
 Avgc1.0 + 0.3
  • a The results are averages based on the results of two experiments. The results were very reproducible for each isolate (data not shown).

  • b Isolate C1841 is not listed because this isolate did not sporulate in DS medium.

  • c Average D value of eachcpe genotype ± standard error.