What are the precautions for widal test?

The Widal test, used to diagnose typhoid fever, requires several precautions to ensure accurate results. Patients should avoid antibiotics for at least two weeks before the test, as they can interfere with antibody detection. Additionally, the test should be performed in a laboratory with proper quality control measures to avoid false positives or negatives. Finally, it's important to interpret the results in conjunction with clinical symptoms and other diagnostic tests for a comprehensive evaluation.