Hello. In Widal test, any positive ratio less than 1:160 (1:20, 1:40 or 1:80) is considered normal, whereas any ratio more than 1:160 suggests Salmonella infection. In your case, its positive at 1:40, which is normal. You don't need to worry about it. Hope this helps.
Answered2016-07-25 15:23:58
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