Zur Frage der Typenkonstanz bei den Diphtheriebacillen

The Types Mitis, Intermedius and Gravis of Corynebacterium Diphtheriae

“…In that case, Type IV of Wright and Christison would represent the extreme rough variation of the mitis strain. This theory is approximately that advanced by Clauberg, et al (31). There is much to be said for this explanation, but it does not meet satisfactorily the existence of the large numbers of apathogenic strains of this kind.…”