“…There are, of course, numerous examples to be found in the literature of obscure, nontraumatic infections in which C. perfringens and occasionally other anaerobes have been found (213,374,975, 1090a, vide infra) but these are not primarily infections of muscles. On the other hand, severe idiopathic anaerobic myonecrosis is common enough in veterinary medicine (923,951); but it is a well attested fact that many healthy animals harbor pathogenic anaerobic bacteria in their tissues (40,72,764,871,1076). There is no evidence of a similar hostparasite relationship in man, although it has been frequently sought.…”