what is the significance of widal quantitative test?

Question

widal quantitative test

Answer 1

It estimates the antibody titre to Salmonella typhi, which causes typhoid or enteric fever and S. paratyphi, causing paratyphoid. S. typhi 'O' signifies present infection and 'H' old infection or vaccination. 'Generally, 'O' titre of 1:160 or more is taken as signicant. A serially rising titre is more suggestive of infection.
However, it is now considered an out-dated test. Blood culture is the most reliable test for typhoid. Now, there are also other antibody tests like Typhidot.

Answer 2

Please see the webpages for more details on Widal test.