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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Does This Widal Test Report Indicate?

Hey, I get my blood result. The result is as follow: WIDAL: Sal. Typhi O : positive 1 in 80 Dilution Sal. Typhi H : Negative 1 in 20 Dilution Sal. Para Typhi AH : Positive 1 in 320 Dilution Sal. Para Typhi BH : Negative 1 in 20 Dilution. Can you please suggest whether i have Thyphoide fever.
Mon, 21 Nov 2016
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General & Family Physician,  's  Response
Hi . Good to see you concerns for your health
Widal test detect various antigens at different dilutions. If "H" and "O" antigens are positive at 160 or more times dilution then widal test is considered positive. So seeing the above results it can be said that you are not having typhoid because your "O" antigen is detected only upto 80 times dilution. But widal is not taken as a confirmative test and its values fluctuate during the course of illness. So a repeat widal is advised after two weeks or you can have further investigations (stool culture in first week and stool/blood culture in second week of illness.) for a confirmation. Wishing you best of health.
Regards
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What Does This Widal Test Report Indicate?

Hi . Good to see you concerns for your health Widal test detect various antigens at different dilutions. If H and O antigens are positive at 160 or more times dilution then widal test is considered positive. So seeing the above results it can be said that you are not having typhoid because your O antigen is detected only upto 80 times dilution. But widal is not taken as a confirmative test and its values fluctuate during the course of illness. So a repeat widal is advised after two weeks or you can have further investigations (stool culture in first week and stool/blood culture in second week of illness.) for a confirmation. Wishing you best of health. Regards