However, getting a Widal test positive result can be confusing if you’re unsure what it means. In this article, we’ll walk you through everything you need to know about the Widal test, how to interpret a positive result, and what steps you should take next to protect your health. A positive Widal test means Salmonella Typhi antibodies are present in the blood which is an indication of active typhoid. And if the test results are negative it means there is no active infection. Widal test: Introduction, Principle, Procedure, Result interpretation, Applications and limitations Introduction Widal test is a serological test which is used for the diagnosis of enteric fever or typhoid fever. The test was developed by Greembaum and Widal in 1896. Typhoid or enteric fever is caused by a gram negative bacteria Salmonella enterica (Salmonella Typhi or Salmonella Paratyphi), found in the intestine of man. Salmonella paratyphi also causes Typhoid but of a milder form ... The Widal test, developed in 1896 and named after its inventor, Georges-Fernand Widal, is an indirect agglutination test for enteric fever or undulant fever whereby bacteria causing typhoid fever are mixed with a serum containing specific antibodies obtained from an infected individual.
