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A Widal test means your body has developed resistance against Salmonella bacteria. However, the positive result means past exposure to the disease, inherent antibodies, or false positives. What does a Widal test positive result mean? It means your blood contains antibodies against Salmonella bacteria, which may indicate a past or present infection. Widal Test is an agglutination test which detects the presence of serum agglutinins (H and O) in patients serum with typhoid and paratyphoid fever. Widal Test- Introduction, Principle, Procedure, Interpretation and Limitation 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 ...
