Asymptomatic pharyngeal plague infection in Vietnam.
D006801:Humans; D066298:In Vitro Techniques; D010608:Pharyngeal Diseases / Q000175:diagnosis*; D010930:Plague / Q000175:diagnosis*; D011159:Population Surveillance; D012698:Serologic Tests; D013183:Sputum / Q000032:analysis*; D014744:Vietnam; D015010:Yersinia pestis / Q000302:isolation & purification*