A New Organism Resembling P. Tularensis Isolated from Water

Abstract

DEMONSTRATION of the presence of Pasteurella tularensis in ponids, rivers, anid streamiis in northwestern United States (1) promiipted continued study on the distributioni of P. tulareensis in such waters, especially where there have been reports of epizootics in a(qtuatic mamiimals.During the course of the studies, an organism, attpparently not described in the literature, was detected in a water sample obtained fromn Utah.The purpose of this paper is to describe this organism, for which we propose the name Pasteurella novicida sp.niov.In correspondence and in the exchange of cultures, this organism lhas been referred to as Utah 112. Isolation of the OrganismA turbid water sample collected from Ogden Bay Bird Refuge, near Ogden, Utah, was re- ceived September 12, 1950, from Dr. Jessup B. Low of the Utah Cooperative Wildlife Re- search Unit.Muskrats had been found dead in the immediate area where the sam-ple was col- lected.Two guinea pigs were eaclh injected