Clinical value of Tubex and Typhidot rapid diagnostic tests for typhoid fever in an urban community clinic in Bangladesh

Diagn Microbiol Infect Dis. 2008 Aug;61(4):381-6. doi: 10.1016/j.diagmicrobio.2008.03.018. Epub 2008 May 22.

Abstract

Tubex and Typhidot, rapid tests for typhoid fever, performed well in evaluations conducted in hospital settings among patients with culture-confirmed typhoid fever. We evaluated these tests in a community clinic in Bangladesh. Blood samples were obtained from 867 febrile patients for culture, Typhidot and Tubex tests. Considering the 43 blood culture-confirmed cases of typhoid fever as typhoid positive and the 24 other confirmed bacteremia cases as typhoid negative, Tubex was 60% sensitive and 58% specific, with 90% positive and 58% negative predictive values (NPVs); Typhidot was 67% sensitive and 54% specific, with 85% positive and 81% NPVs. When blood culture-negative patients and other bacteremia cases together were considered typhoid negative, positive predictive values were only 14% for Tubex and 13% for Typhidot, increasing to only 38% and 20% when restricted to patients with > or = 7 days of fever. We conclude that the value of Tubex and Typhidot tests for typhoid fever diagnosis in a community clinic in urban Bangladesh is low.

Publication types

  • Comparative Study
  • Evaluation Study
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • Aged, 80 and over
  • Bacteremia / microbiology
  • Bangladesh
  • Blood / microbiology
  • Child
  • Child, Preschool
  • Diagnostic Tests, Routine / methods*
  • Female
  • Humans
  • Infant
  • Infant, Newborn
  • Male
  • Middle Aged
  • Salmonella typhi / isolation & purification*
  • Sensitivity and Specificity
  • Typhoid Fever / diagnosis*
  • Typhoid Fever / microbiology
  • Urban Population