[On the method of titration of Rickettsia of the typhus group and Q fever on chick embryos].
D000818:Animals; D002642:Chick Embryo; D006801:Humans; D011778:Q Fever; D012281:Rickettsia / Q000208:ethnology*; D014438:Typhus, Epidemic Louse-Borne
RICKETTSIA/culture