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Appl Environ Microbiol. 1965 September; 13(5): 788-792
Copyright © 1965 American Society for Microbiology. All Rights Reserved.

Effects of Animal Alimentary Passage on the Heat Resistance of Clostridium perfringens¹

Department of Foods and Nutrition, University of Wisconsin, Madison, Wisconsin

ABSTRACT

The resistance to heat, as measured by D values and phantom thermal death time curves, was observed to increase for one of three strains of Clostridium perfringens type A subsequent to animal passage. Animal passage was accomplished by the force-feeding of germ-free mice with bacterial suspensions of the organism, followed by the force-feeding of additional gnotobiotic mice with the contaminated feces. For the one strain in which an increase in heat resistance was noted, the result could not be attributed to mouse feces per se, since the presence of sterile germ-free mouse feces in a suspending medium did not protect C. perfringens spores from elevated temperature destruction.

² Present address: Gerber Products Co., Fremont, Mich.

¹ Published with the permission of the Director of the Wisconsin Agricultural Experiment Station, Madison. This paper is part of a thesis submitted by the senior author to the Graduate School of the University of Wisconsin in fulfillment of the requirements for the Ph.D. degree.