[Investigation on serology of endemic typhus in certain parts of Hebei Province (author's transl)].
D000818:Animals; D002681:China; D003168:Complement Fixation Tests; D004199:Disease Vectors; D006801:Humans; D008003:Phthiraptera; D051381:Rats; D012698:Serologic Tests; D014438:Typhus, Epidemic Louse-Borne / Q000276:immunology*