The heat resistance of anaerobic spores in aqueous suspension

Abstract
Summary. Aqueous spore suspensions of Clostridium aerofoetidum, Cl. caloritolerans, Cl. histolyticum, Cl. sordellii, Cl. sporogenes and Cl. subterminale were heated at temperatures within the range 70–95†C. 80†C for 1 hr was without effect on Cl. aerofoetidum, but reduced Cl. caloritolerans, Cl. histolyticum and Cl. sporogenes to about 25% of the initial count, and Cl. sordellii and Cl. subterminale to about 0.01%. No significant heat‐activation was detected. Not all survivor curves were exponential.