Clostridium Pasteurianum Associated With Spoilage of an Acid Canned Fruit 1

SUMMARY Morphological and physiological characteristics are presented for saccharolytic butyric anaerobes isolated from bursting swells of canned pineapple. The two types studied are regarded as smooth and rough strains of one species, Clostridium pasteurianum Winogradsky. The writer is greatly indebted to Dr. Elizabeth McCoy for kindly advice on all phases of the problem and especially for help in interpretation of results on serological reactions. Acknowledgment is gratefully made to Dr. Newell O. Sjolander for results on nitrogen fixation and for much of the work on products of fermentation.