title: Typhus in Northern Nigeria; clinical studies.
mesh_terms: D035843:Biomedical Research; D006801:Humans; D009549:Nigeria; D012282:Rickettsia Infections; D014438:Typhus, Epidemic Louse-Borne / Q000453:epidemiology* / Q000706:statistics & numerical data*
keywords: RICKETTSIAL DISEASES; TYPHUS/epidemiology and statistics