Botulism was diagnosed in 3-week-old broilers from clinical signs, absence of postmortem and histopathological lesions, and demonstration of toxin in the serum of comatose birds. Passive immunization of mice with Clostridium botulinum type-C antitoxin protected against a challenge with serum from comatose birds containing the Cl. botulinum toxin. Total mortality for the grow-out period exceeded 27% and was not altered by water medication with penicillin. Bacitracin at 100 g per ton reduced mortality to 5-7 birds per day.
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Page et al. (1975) studied this question.