Comparative effects of osmotic, sodium nitrite-induced, and pH-induced stress on growth and survival of Clostridium perfringens type A isolates carrying chromosomal or plasmid-borne enterotoxin genes

Article Abstract:

The differences found in the sensitivities of vegetative cells and spores of Clostridium perfringens isolates carrying the enterotoxin gene (C-cpe) isolates versus P-cpe isolates to osmotic, nitrite-induced, and pH-induced stress are evaluated. The results have indicated that both vegetative cells and spores of C-cpe isolates are unusually resistant to several food preservation approaches in addition to temperature extremes and that these bacteria might employ multiple mechanisms to persist and grow in foods prior to their transmission to humans.

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Further comparison of temperature effects on growth and survival of Clostridium perfringens type A isolates carrying a chromosomal or plasmid-borne enterotoxin gene

Article Abstract:

A study is conducted to assess whether vegetative cells and spores of chromosomal enteretoxin gene (cpe) isolates survive better than vegetative cells and spores of plasmid cpe isolates survive when the vegetative cells and spores are subjected to low temperatures. Results suggest that chromosomal cpe isolates are commonly involved in food poisoning due to their increase in resistance to low temperatures for both survival and growth.

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Comparative experiments to examine the effects of heating on vegetative cells and spores of Clostridium perfringens isolates carrying plasmid genes versus chromosomal enterotoxin genes

Article Abstract:

Isolates of Clostridium perfringens that have a chromosomal gene for enterotoxin are more resistant to heat than those that have a plasmid gene for enterotoxin. This may explain why isolates with the chromosomal gene are often linked to food poisoning whereas those with the plasmid gene are not.

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