[Studies on human sera for antibodies against Clostridium butyricum strain Jean H 8]

In 235 human sera, antibodies against Clostridium butyricum strain Jena H8 could be demonstrated in 33 patients (15%); only 189 sera (80%) reacted negatively, and in 5% (13 sera) a questionable reaction was obtained. The results are discussed, pointing out the necessity of preliminary titer determination if the clostridia-tumor phenomenon is to be utilized for early diagnosis of cancer.