1.

widal, a serological test, is used to detect the presence of which of the following pathogenic microorganisms? 1. E coli2. Mycobacterium tuberculosis3. Haemophilus influenzae4. Salmonella typhi

Answer» Correct Answer - Option 4 : Salmonella typhi

Concept:

  • Widal test detects antibodies against the antigens of Salmonella. Typhi.
  • It assesses the antibodies against flagellar (H) and somatic (O) antigens.
  • Salmonella typhi causes enteric fever or typhoid.

Explanation:

  • The test was developed by Georges Ferdinand Widal in 1896.
  • It is an indirect agglutination test.

  • Salmonella typhi spreads through oral-fecal route.
  • Incubation period: 10-14 days.


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