title: Vi-phage types in Singapore.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001434:Bacteriophage Typing; D002648:Child; D002675:Child, Preschool; D004352:Drug Resistance, Microbial; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D008875:Middle Aged; D012485:Salmonella typhi / Q000302:isolation & purification*; D012846:Singapore; D014435:Typhoid Fever / Q000453:epidemiology*