Widal Test (Tube Agglutination)

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Widal test (Tube agglutination) is a laboratory diagnosis used to determine enteric fever commonly referred to as typhoid fever.

What is Widal test (Tube agglutination)?

Widal test (Tube agglutination) was developed in 1896 by Georges Ferdinand Widal. Widal test (Tube agglutination) is used to examine the presence of salmonella bacteria in the blood. The antibodies that are produced in response to the infection of salmonella bacteria are used for diagnosis in Widal test (Tube agglutination). [2]

Why is Widal test (Tube agglutination) suggested?

Widal test (Tube agglutination) is suggested if the patient has the following symptoms

  • Headache and Fatigue.
  • Diarrhea or Constipation.
  • Rashes known as ‘’rose spots”. [1]

How is Widal test (Tube agglutination) performed?

Widal test (Tube agglutination) is carried out in a medical facility.

  • Blood is drawn from a vein from the elbow.
  • An elastic band is wrapped around the arm to make the vein swell with blood.
  • Blood will be drawn until the syringe tube is full.

The result of the Widal test (Tube agglutination) is then obtained by analyzing this blood sample with the antigens. 

What are the parameters measured in Widal test (Tube agglutination)?

The antibodies produced in blood in response to the infection of salmonella bacteria are measured in the Widal test (Tube agglutination). [3]

Preparation before performing Widal test (Tube agglutination)

Check with your doctor if there is any specific preparation needed before Widal test (Tube agglutination).

  • Avoid alcohol or any other medications 24 hours prior to Widal test (Tube agglutination). [2]

Post-care after Widal test (Tube agglutination)

You can resume your normal activities after Widal test (Tube agglutination).

  • Contact your doctor if there is prolonged pain or infection in the injected area after Widal test (Tube agglutination). [2]

Sample types in Widal test (Tube agglutination)

A blood sample is usually used in the Widal test (Tube agglutination).

  • Stool, Urine or Bone marrow culture may also be used as a sample. [1]

Risks of Widal test (Tube agglutination)

There are no major risks involved in Widal test (Tube agglutination).

  • Mild pain in the injected area.
  • Other non-enteric infections cause false positive results. [2]

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