title: Two strains of rickettsiae of Rocky Mountain spotted fever group recovered from Dermacentor marginatus ticks in Czechoslovakia. Results of preliminary serological identification.
mesh_terms: D000818:Animals; D001179:Arthropod Vectors; D002642:Chick Embryo; D003168:Complement Fixation Tests; D003381:Coxiella; D003604:Czechoslovakia; D012281:Rickettsia / Q000145:classification / Q000276:immunology / Q000302:isolation & purification* / Q000472:pathogenicity; D012703:Serotyping; D013987:Ticks