Widal test is doing for identify the typhoid fever.
O antigen
In the acute stage, Antigen O will be positive and titer will be more than 1:160.O antigen appears early and also disappear early.
H antigen
H antigen rises late and disappears late.This will be positive in the recovery stage.
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Disclaimer : The content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding your medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read on this website.
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