title: Salmonellosis, possibly paratyphoid A--problems with the Widal test.
authors.forename: M J
authors.initials: MJ
authors.lastname: van der Heiden
authors.forename: H J
authors.initials: HJ
authors.lastname: Koornhof
mesh_terms: D000368:Aged; D003429:Cross Reactions; D006801:Humans; D008297:Male; D010284:Paratyphoid Fever / Q000175:diagnosis*; D012698:Serologic Tests; D014435:Typhoid Fever / Q000175:diagnosis*