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Karim Mehta
Asked: 2022-10-30T20:46:11+05:30 In:

widal, a serological test, is used to detect the presence of which of the following pathogenic microorganisms? 
1. E coli
2. Mycobacterium tuberculosis
3. Haemophilus influenzae
4. Salmonella typhi

widal, a serological test, is used to detect the presence of which of the following pathogenic microorganisms? 
1. E coli
2. Mycobacterium tuberculosis
3. Haemophilus influenzae
4. Salmonella typhi
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  1. 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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