Hunting the carrier.
D001431:Bacteriological Techniques; D002353:Carrier State; D006801:Humans; D012480:Salmonella Infections; D012482:Salmonella paratyphi A / Q000302:isolation & purification; D012485:Salmonella typhi / Q000302:isolation & purification; D012722:Sewage
D012722:Sewage