Understand Your Test

Widal Test

The Widal test is one method that may be used to help make a presumptive diagnosis of enteric fever, also known as typhoid fever. Although the test is no longer commonly performed in the United States or other developed countries, it is still in use in many emerging nations where enteric fever is endemic and limited resources require the use of rapid, affordable testing alternatives. While the method is easy to perform, concerns remain about the reliability of the Widal test. It is not specific for typhoid fever and can be positive when a person does not have the infection.