Evaluation of a single Widal test in the diagnosis of enteric fever

Southeast Asian J Trop Med Public Health. 1991 Sep;22(3):375-9.

Abstract

The usefulness of a single Widal test was evaluated in an endemic area. This test was done on 62 bacteriologically proven enteric fever cases, 69 non-enteric fever cases and healthy individuals. Using an 0 antibody cut-off of greater than or equal to 1:20, the Widal tube agglutination test yielded a sensitivity of 61% and a specificity of 88%. At a pre-test probability of around 50%, the positive predictive value was 83% and the negative predictive value was 72%. A 4% prevalence of 0 antibodies was noted in the healthy population.

MeSH terms

  • Adolescent
  • Adult
  • Agglutination Tests / standards*
  • Evaluation Studies as Topic
  • Female
  • Humans
  • Male
  • Philippines / epidemiology
  • Prevalence
  • Sensitivity and Specificity
  • Typhoid Fever / blood
  • Typhoid Fever / diagnosis*
  • Typhoid Fever / epidemiology