hello,

thanks for you query.
It is quite possible to get Typhoid again as Salmonella Typhi accumulate in the gallbladder may remain there for years and infect other persons actively.

There are many controversies regarding the Widal test especially involving the quality of the antigens used and interpretation of the result, particularly in endemic areas.

A titre above 1:80 should be considered as significant but traditionally a positive Widal test is based on a fourfold rise in O agglutinins in repeated tests or a titre of > 1:160 in a single test.

However you are advised to get blood and stool culture for confirmation and rule out chronic carrier state.

Hope it helps.

Hello!

thanks for writing to us.

Once you get typhoid fever, typhoid lab test (widal) may remain positive for a long up to years in borderline titres of less than 160.But in your case there is significant rise in antibody titre (320) their are chances of relapse of typhoid fever as you have persistent lethargy,malaise,headache also.
Relapse rate for typhoid is up to 10-20% and 3-4% patients can have chronic carrier state.

Relapses typically occur approximately 1 week after therapy is discontinued, but relapse after 70 days has been reported. In these cases, the blood culture results are again positive, and high serum levels of H, O, and Vi antibodies and rose spots may reappear.
Previous infection does not confer immunity. In any suspected relapse, infection with a different strain should be ruled out.

Hence get blood culture done for salmonella infection.

Hope this could help you.

thanks for your query.
Most likely this widal titre is from the prior infection.
You probably have some intestinal infection which will be clear by stool microscopy & stool culture results.
In the absence of fever the chance of you having typhoid fever this time are improbable but not impossible.
Discuss with your doctor once you have awaited results.
Hope you find information useful.