Wain J, Diep TS, Bay PVB, Walsh AL, Vinh H, Duong NM, Ho VA, Hien TT, Farrar J, White NJ, Parry CM, Day NPJ (2008) Specimens and culture media for the laboratory diagnosis of typhoid fever. J Infect Dev Ctries 2:469–474. doi: 10.3855/jidc.164