and had ciprofloxacin and levofloxacin as antibiotics of choice
The Widal Test detects the presence of serum antibodies (O and H) in patients with typhoid fever. The method relies on a reaction in a test tube or on a slide between antibodies present in the infected person's blood sample and specific antigens of S. typhi, which produces clumping that is visible to the naked eye.
An active infection is present when the results show 1:100 or more for O and 1:200 or more for H.
Although the test is no longer commonly performed in the United States or other developed countries, it is still in use in many developing countries where typhoid fever is endemic and limited resources require the use of rapid, affordable testing alternatives.
The World Health Organization (WHO) has said that due to the various factors that can influence the results of a Widal test, it is best not to rely too much on this test.
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