Accessory Growth Factor Requirements of the Members of the Genus Pasteurella

Abstract

Since preliminary work in this laboratory has shown that most of the members of the Pasteurella group could not be cultivated ini'synthetic mediums composed of amino acids, inorganic salts and glucose, a study of the accessory growth factor requirements of these organisms was undertaken. The organisms commonly included in this group are: (1) the hemorrhagic septicemia strains, which at present are designated according to their zoological source, such as Pasteurella avicida, Pasteurella boviseptica, etc., (2) Pasteurella pestis, (3) Pasteurella pseudotuberculosis and (4) Pasteurella tularense. Pasteurella hemolytica is the name suggested by Newsom and Cross1 for those organisms isolated from cases of hemorrhagic septicemia in animals, which nevertheless show certain physiological characteristics different from the typical forms (Past, avicida, Past, boviseptica, etc.). There has been some discussion as to whether or not the causative agent of tularemia belongs in the genus Pasteurella.