Finding the typhoid carrier.
D002353:Carrier State / Q000175:diagnosis*; D005243:Feces / Q000382:microbiology; D006385:Hemagglutination Inhibition Tests; D006801:Humans; D012482:Salmonella paratyphi A / Q000302:isolation & purification; D012485:Salmonella typhi / Q000302:isolation & purification*; D012698:Serologic Tests; D014435:Typhoid Fever / Q000517:prevention & control*