| biological properties of rickettsia prowazekii strains isolated from flying squirrels. | four strains of rickettsia prowazekii, isolated from flying squirrels (glaucomys volans volans) from florida and virginia, were compared with other strains of the typhus biotype, two previously established strains each of r. prowazekii and r. typhi and one strain of r. canada, for similarities in a number of unrelated phenotypic characteristics. r. akari served as a spotted fever biotype control. all strains produced small plaques on chicken embryo cell monolayers that were clearly recognized on ... | 1977 | 408272 |