An evaluation of purified Salmonella Typhi protein antigens for the serological diagnosis of acute typhoid fever.

This segregation between the patient groups was highly significant, resulting in p -values of 0.0001 and 0.003 for IgM against STY4539; <0.0001 and 0.004 for IgM against STY1886; and 0.0001 and 0.0001 for IgM against Vi, between healthy controls and typhoid infections and between other febrile diseases and typhoid infections, respectively (Wilcoxon signed-rank test).

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