A note on the heat resistance of a South African strain of Clostridium botulinum type B

Abstract

The use of high-energy rations is of considerable importance to the broiler producer, and it is intended to show in subsequent papers that the incorporation of fat in broiler rations leads to cheaper meat production, although the ration itself is, of course, more expensive per ton, but may not be more expensive if based on T.D.N. The use of fat in the ration of range laying birds in the winter time will probably lead to increased egg production under these conditions, and work of this nature will also be reported in a further paper. Conclusionscorrect balance between T.D.N. and crude protein.I. To obtain the full benefit from the addition of fat to a chick feed, the ration must have a 2. There is a narrow range of T.D.N./C.P. ratio which gives maximum efficiency.3. The addition of oil or fat to a properly constructed ration consistently improves growth rate and feed conversion. Acknowledgment mission to publish this work.The z and D values ior a South African strain of Closfridium botulinum, type B, have been determined by a method described. The results indicate that the South African strain at least equals in heat resistance the maximum resistance for Clostridium botulinum assumed in process calculations for canned foods.