<prompt> The following statements are true regarding botulism except -Infant botulism is caused by ingestion of preformed toxinClostridium botulinum A, B, C and F cause human diseaseThe gene for botulinum toxin is encoded by a bacteriophageClostridium baratti may cause botulism  <response>: Ans. is a i.e., Infant botulism is caused by ingestion of preformed toxin . Infant botulism is caused by ingestion of spores. Spores are ingested in food, get established in the gut and there produce the toxin. Seven main types of C. botulinum, designated A - G, produce antigenically distinct toxins with pharmacologically identical action. All types can cause human disease, but type A, B and E are most common. In Harrison Ananthanarayan, eight types of C. botulinum A, B, CI, C2, D, E, F, G have been mentioned. . Toxin production in clostridium botulinum appears to be determined by presence of bacteriophage at least in type C D. . Clostridium butyricum and clostridium baratti have also been found to produce toxin. - Harrison 16the 843 - Any strain producing toxin will obviously cause botulism. 