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Dr. Andrew Rynne
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Dr. Andrew Rynne

Family Physician

Exp 50 years

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Is My Salmonella Typhi 20 Normal?

I have a lab result that show the following result: Microbiology Test name O . H. Ref values Salmonella Typhi. Salmonella paratyphi A. Salmonella paratyphi B. Salmonella paratyphi C. Pls what is the meaning of the result
Wed, 16 Jul 2014
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Pathologist and Microbiologist 's  Response
Hello and welcome to HCM,

The test mentioned by you is Widal test.
Widal test is done to detect Salmonella infection or typhoid infection.
Typhoid is caused by Salmonella typhi, Salmonella paratyphi A and B.
The test is reported as antibody titres.
The antibody titres are significant when more than 1:80 for O and H antigens.

The test shows an antibody titres of 1:20 which suggests that no typhoid infection is present.

Thanks and take care
Dr Shailja P Wahal
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Is My Salmonella Typhi 20 Normal?

Hello and welcome to HCM, The test mentioned by you is Widal test. Widal test is done to detect Salmonella infection or typhoid infection. Typhoid is caused by Salmonella typhi, Salmonella paratyphi A and B. The test is reported as antibody titres. The antibody titres are significant when more than 1:80 for O and H antigens. The test shows an antibody titres of 1:20 which suggests that no typhoid infection is present. Thanks and take care Dr Shailja P Wahal