“…It must also be mentioned here that human enteric infections with C. perfringens type D have been clearly demonstrated on at least two occasions (355,545). From an epidemiological standpoint such cases are to be regarded as no more than oddities, yet they do indicate that several more of the known types and, therefore, several more of the known toxins of C. perfringens are potentially of importance in human disease (642). As for C. perfringens type A, it will be seen from Tables 2 and 3 that this organism can elaborate a-, 0-, K-, A-, and v-toxins.…”