Description:
The Salmonella Typhi Antigen (Ag) Test is a rapid diagnostic test used to detect Salmonella Typhi antigens in blood, stool, or urine samples. It helps in the early detection of typhoid fever, a serious bacterial infection caused by Salmonella Typhi.

How the Test Works

This test identifies specific antigens of Salmonella Typhi, which are proteins or molecules produced by the bacteria during an active infection. Unlike antibody-based tests (IgM/IgG), which detect the body’s immune response, the Salmonella Typhi Ag Test directly detects the presence of the bacteria.

Interpreting Results

Positive Result → Indicates the presence of Salmonella Typhi antigens, suggesting an active infection.

Negative Result → No detectable antigens, but infection cannot be ruled out, especially in early stages.

Why is the Test Important?

Provides rapid and early diagnosis of typhoid fever.

Helps guide timely treatment to prevent complications.

Useful in outbreak investigations and screening in endemic areas.

Additional Testing

A positive result should be confirmed with other tests such as:

Blood Culture – The gold standard for detecting Salmonella Typhi.

Stool or Urine Culture – Identifies bacterial shedding in chronic carriers.

Typhi IgM/IgG Test – Detects the body’s immune response to infection.

If you experience high fever, weakness, abdominal pain, or digestive issues, consult a healthcare provider for proper diagnosis and treatment.