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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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Widal Test Shows S Thyphi O+, S Thyphi H+, Paratyphi AH, S Paratyphi BH. Thyphoid?

Hi,

Need help in reading the WIDAL test report.

The results are :

1/20 1/40 1/80 1/160 1/320
S Typhi 'O' + + - - -
S Typhi 'H' + + - - -
S Para Typhi 'AH' - - - - -
S Para Typhi 'BH' - - - - -

Pl confirm if I have typhoid or not
Fri, 8 Nov 2013
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General & Family Physician,  's  Response
Hello dear,

The Widal report shows positive result in titers of 1/20 & 1/40 for S typhi O & H respectively.
But a titer of 1/20 & 1/40 is very less & not considered significant.
Widal test is considered positive if antigen titer is more than 1:160 in presence of active infection.
Moreover, a single Widal test is usually not significant.
And a repeat test has to be done for comparison of the values to determine the presence of infection & success of the treatment.

If the repeat test shows an increased titers, then it is considered significant & treatment has to be started with antibiotics.

Wishing you a good health.
Take care.
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Widal Test Shows S Thyphi O+, S Thyphi H+, Paratyphi AH, S Paratyphi BH. Thyphoid?

Hello dear, The Widal report shows positive result in titers of 1/20 & 1/40 for S typhi O & H respectively. But a titer of 1/20 & 1/40 is very less & not considered significant. Widal test is considered positive if antigen titer is more than 1:160 in presence of active infection. Moreover, a single Widal test is usually not significant. And a repeat test has to be done for comparison of the values to determine the presence of infection & success of the treatment. If the repeat test shows an increased titers, then it is considered significant & treatment has to be started with antibiotics. Wishing you a good health. Take care.