the Widal test normal range chart
Widal Test Normal Range Chart
The Widal test is a blood test that is used to diagnose typhoid fever and paratyphoid fever. It works by measuring the levels of antibodies to the Salmonella typhi and Salmonella paratyphi bacteria in the blood.
The normal range for the Widal test is a titer of less than 1160 for both the O and H antigens. A titer of 1160 or higher is considered positive and indicates a current or recent infection with Salmonella typhi or Salmonella paratyphi.
It is important to note that the Widal test is not always accurate. It can give false-positive results in people who have been vaccinated against typhoid fever or who have been exposed to the bacteria but do not have an active infection. False-negative results can also occur, especially in the early stages of infection.
If you have a positive Widal test result, your doctor will likely order additional tests to confirm the diagnosis of typhoid fever or paratyphoid fever. These tests may include a blood culture, a stool culture, or a CT scan of the abdomen.
Here is a table of the Widal test normal range chart
| Antigen | Titer |
| O | < 1160 | | H | < 1160 | If you have any questions about the Widal test or its normal range, please talk to your doctor. Here are some additional things to keep in mind about the Widal test * The Widal test is not always necessary to diagnose typhoid fever or paratyphoid fever. If you have symptoms of these infections, your doctor may order other tests, such as a blood culture or a stool culture, which are more accurate. * The Widal test can take several days to get results. * The Widal test is not always available in all hospitals or clinics. If you have any questions about the Widal test, please talk to your doctor.