Characteristics of Pasteurella multocida of human origin.

Physiological, serological, morphological, and cultural differences were observed among 30 Pasteurella multocida cultures of human origin. The usual variations in the fermentation of glycerol, lactose, sorbitol, trehalose, and xylose were observed. Unlike most P. multocida, two cultures did not produce indol. Six serotypes were found. In addition to the widely recognized iridescent, blue, and watery mucoid (circular) colonies, punctiform colonies were observed. None of the cultures were pathogenic for turkeys. Results of the study indicate that one should be aware of the many variable characteristicx of P. multocida of human origin to facilitate indentification.