A Study of the Hemorrhagic Septicemia Pasteurellae

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Abstract
The study of 44 strains of hemorrhagic septicemia Pasteurellae revealed the presence of a Typical non-hemolytic, indol producing group and an Atypical hemolytic non-indol producing group. The typical Pasteurellae cross host species lines in morphology, biochemistry, antigenicity and patho-genicity which invalidates the present names used (i.e., Pasteurella avicida, boviseptica, etc.). The name P. mul-tocida (Kitt 1885) n. comb is suggested for this group. The atypical strains were named P. hemolytica by Newsom and Cross and is recognized. The typical strains were divided into two rather distinct subgroups and a third less distinct one on the basis of xylose, arabinose and dulcitol fermentation and by agglutination reactions. Temporary and permanent variants were observed. The latter were of "R" and "M" types.

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