Studies of a Filter-Passing Infectious Agent Isolated from Ticks: V. Further Attempts to Cultivate in Cell-Free Media. Suggested Classification

Abstract

Further attempts to cultivate the filter-passing infectious agent isolated from the Rocky Mountain wood tick, Dermacentor andersoni, in cell-free leptospira media have failed. The infectious agent survived in serial passage through 6 subcultures, but was not demonstrated in later subcultures. In culture tubes kept at 28[degree]C. it survived for at least 109 days with no appreciable loss of infective titre. The name Rickettsia diaporica is proposed for this organism.