Widal Test (Slide Agglutination) test helps to detect typhoid fever and paratyphoid fever, collectively called enteric fever, which is caused by the consumption of food or water contaminated by Salmonella bacteria. These microorganisms, like Salmonella typhi and Salmonella paratyphi A, B, and C cause this. Typhoid fever, or enteric fever, is an acute, life-threatening, fever-causing illness that is transmitted by the ingestion of food or water that has been contaminated with the faeces of a person who has been infected with the bacteria Salmonella typhi. In this test, the blood of an individual reacts with the Salmonella antigens on the slide and either forms agglutination (clumping) or not.

The Widal test price ranges from Rs. 440/- . Our Widal test cost includes home sample collection within 60 minutes of booking. Orange Health Labs offers this test at competitive rates, with the added convenience of home-based testing. While you can enjoy the ease of testing from home, please be aware that prices may vary based on your location and the laboratory you choose. The Widal test cost in other cities is as given below:

The Widal Test does not require any special preparations. Fasting is not necessary, and patients can maintain their regular diet and daily routine prior to the test. However, individuals should inform their healthcare provider of any recent typhoid vaccinations, as these may influence test results. This information ensures accurate interpretation of the antibody titres and minimizes the likelihood of false positives.

The Widal blood test requires a simple blood sample. Once you schedule the test with Orange Health Labs, a trained eMedic will come to your location for home sample collection. The process includes the following steps:

• Preparation : The eMedic will explain the procedure to you and answer any questions you may have. You will be asked to sit comfortably for the test.

• Site Selection : The eMedic will select a vein, usually in the inner elbow area, and clean the area with an antiseptic wipe.

• Needle Insertion : A needle will be inserted into the vein to draw blood, and you may experience a mild pinch or sting at this point.

• Blood Collection : The necessary amount of blood will be drawn into a vial.

• Needle Removal : After the blood is collected, the needle will be removed, and the eMedic will apply pressure with a gauze pad to stop any bleeding.

• Bandaging : A small bandage will be placed over the puncture site for protection.

The sample collection process usually takes around just a few minutes. Widal test results are typically available within 7 hours after the sample is collected.

The Widal Test is an essential diagnostic tool designed to detect typhoid fever and paratyphoid fever, collectively referred to as enteric fever. These conditions result from the consumption of food or water contaminated with Salmonella bacteria, specifically Salmonella typhi and Salmonella paratyphi (A, B, and C). Enteric fever is a severe, life-threatening illness characterized by acute fever and systemic symptoms. By identifying antibodies in the blood, the Widal Test helps detect the body’s immune response to Salmonella, enabling accurate diagnosis and timely intervention. This test is especially valuable in regions where enteric fever is endemic, as it allows for early detection and prevention of complications.

Individuals with Early Symptoms of Enteric Fever:

Patients with Advanced Symptoms of Enteric Fever:

High-Risk Groups:

Travelers and Individuals with Prolonged Fever:

A variety of symptoms indicate the need for a Widal Test. These signs range from mild systemic symptoms to more severe manifestations, often correlating with the progression of enteric fever. Early symptoms include:

• Fever and Abdominal Pain: Common initial signs of infection.

• General Unwellness: Fatigue, weakness, and lack of appetite are typical early indicators. As the disease worsens, more specific symptoms emerge, such as:

• High Fever (up to 104°F): Persistent and severe.

• Headaches and Rose-Colored Spots: Headaches are often accompanied by characteristic rashes on the chest or abdomen.

• Digestive Issues: Constipation, followed by diarrhea in later stages.

• Neurological Symptoms: Confusion, hallucinations, and difficulty concentrating may occur in severe cases. These symptoms necessitate testing, particularly for individuals in high-risk environments or regions with limited access to clean water and sanitation.

The Widal Test provides results as either positive or negative, based on the titres of antibodies detected.

Positive Results: A titre of 1:80 or higher for O antigen and 1:160 or higher for H antigen suggests active infection. A four-fold increase in antibody titres between two tests conducted 7–10 days apart confirms the diagnosis.

Negative Results: Titres below 1:80 for O antigen and 1:160 for H antigen indicate no active infection.

Interpretation of results must consider prior exposure to Salmonella, vaccination history, and the laboratory’s reference ranges, which can vary.

The Widal Test measures antibody titres in the blood against two key antigens of Salmonella enterica :

• O antigen (somatic antigen): Indicates the body’s initial immune response to infection.

• H antigen (flagellar antigen): Reflects the body’s longer-term immune response to the infection. Agglutination, or the clumping of particles, occurs when antibodies in the blood react with these antigens. The test determines the presence and levels of these antibodies, aiding in the diagnosis of typhoid and paratyphoid fever. A titre of 1:80 or more for O antigen and 1:160 or more for H antigen typically indicates active infection.

Advantages of Early Widal Testing

The Widal Test offers several advantages that make it an essential diagnostic tool:

• Quick Diagnosis: Provides rapid and accessible detection of typhoid and paratyphoid fever.

• Cost-Effective: Affordable and widely available, especially in resource-limited settings.

• Ease of Use: Requires only a simple blood sample and can be performed as a slide or tube agglutination test.

• Early Intervention: Facilitates timely treatment, reducing the risk of complications and improving patient outcomes.

The Widal Test is specifically designed to diagnose typhoid fever and paratyphoid fever , collectively referred to as enteric fever. These diseases are caused by infection with Salmonella enterica serotypes Typhi and Paratyphi, which are typically transmitted through contaminated food or water.

Preventing enteric fever involves adhering to hygienic practices and maintaining a healthy lifestyle. Key recommendations include:

• Drinking Safe Water: Consume boiled or purified water to avoid exposure to Salmonella .

• Eating Safely: Avoid raw or undercooked foods, especially in regions with poor sanitation.

• Hand Hygiene: Wash hands thoroughly with soap and water before meals and after using the restroom.

• Vaccination: Consider typhoid vaccination, particularly when traveling to endemic areas.

• Routine Testing: Early testing for enteric fever in symptomatic individuals helps prevent severe complications and limits disease transmission.