Kazár J, Brezina R, Urvölgyi J
Bull World Health Organ. 1973;49(3):257-65.
Cultivation of E strain of Rickettsia prowazeki in mouse lung resulted in a marked increase in virulence for guinea pigs following 12 passages (but not 6 passages) in both immunosuppressed and normal mice. Attempts at passaging E strain in normal guinea pigs were unsuccessful. Isolates of E strain in the chicken embryo yolk sac either from testes and peritoneal washings or from the brain of immunosuppressed guinea pigs did not show enhanced virulence for guinea pigs.
普氏立克次体E菌株在小鼠肺中培养,在免疫抑制和正常小鼠中传代12次(而非6次)后,对豚鼠的毒力显著增加。在正常豚鼠中传代E菌株的尝试未成功。从睾丸和腹腔冲洗液或免疫抑制豚鼠的脑中获取的鸡胚卵黄囊中E菌株分离物,对豚鼠并未表现出增强的毒力。