IgG antibodies against dengue infection are found in your blood using this straightforward test. Aedes aegypti mosquitoes carrying the dengue virus bite humans to spread the virus to them. The midday hours are often when this insect attacks. Dengue virus is the pathogen that causes dengue. The term "break-bone fever" also applies to dengue illness. This infection, which can result in severe illness and even fatality, is widespread in some locations. 

What is the Dengue Virus IgG Antibodies Test?

IgG antibodies against dengue infection are found in your blood using this straightforward test. Aedes aegypti mosquitoes carrying the dengue virus bite humans to spread the virus to them. The midday hours are often when this insect attacks. Dengue virus is the pathogen that causes dengue. The term "break-bone fever" also applies to dengue illness. This infection, which can result in severe illness and even fatality, is widespread in some locations. 

The Immunoglobulin G test, often known as the Dengue IgG Test, is used to identify Dengue virus IgG antibodies. This test is often used as a screening test and yields a preliminary test result to identify any prior or ongoing dengue virus infection. High levels of IgG dengue virus antibodies are indicative of secondary dengue infections. The levels increase throughout the course of 7 days, peaking in the second week. During 90 days, it stays in the blood. Nonetheless, it could persist for the remainder of a person's life in some cases. If IgG is positive but IgM is negative, the person has already been exposed to dengue. 

What is the Purpose of the Dengue Virus IgG Antibodies Test? 

This test may be recommended by your doctor to check for IgG antibodies that the immune system produces after exposure to the dengue virus. This test is typically conducted in conjunction with the serological test for dengue infection known as the Dengue IgG antibody test. At least four days following the beginning of symptoms, these tests are most helpful. This test aids in the diagnosis of recent or previous infections. IgM antibodies suggest a recent infection, but IgG antibodies indicate a previous illness. IgG antibodies the Dengue Virus IgG Antibodies test needs more time to generate, but they persist in the blood for many years. To determine if the levels are rising or falling, an IgG antibody test should be done in 2-4 weeks. After 2-4 weeks, if its level increases by a factor of four, it signals a recent infection. 

What Does the Dengue Virus IgG Antibodies Test Diagnose? 

The main purpose of this test is to aid in the diagnosis of a recent or ongoing infection. They identify IgG and IgM, two distinct kinds of antibodies generated by the body in response to a dengue fever infection. Because the body's immune system creates different amounts of antibodies during the course of a disease, a diagnosis may need a combination of these tests. As IgM antibodies are the earliest to develop, it is best to run testing for them at least 7–10 days after exposure. 

The blood levels increase for a few weeks before gradually declining. IgM antibodies decrease to undetectable levels within a few months. In response to an infection, IgG antibodies are generated more slowly. Acute infections usually cause the level to increase, stabilise, and then last for a long time. Those who have been exposed to the virus before the present illness maintain a level of IgG antibodies in the blood that might influence how diagnostic results are interpreted. 

Why Do You Need a Dengue Virus IgG Antibodies Test? 

When someone shows dengue-related symptoms, testing may be required. 

Dengue virus types 1, 2, 3, or 4 are responsible. Within 4 to 10 days following a mosquito bite, mild dengue infection may manifest with the following symptoms: 

• Fever of high grade (104o F) 

• Headache 

• Nausea 

• Vomiting 

• aching bones and muscles 

• Rashes 

• Eyesight discomfort 

With mild infections, the healing period lasts between 7 and 10 days. Yet occasionally, the illness can get worse and even be fatal. Dengue shock syndrome, also known as dengue haemorrhagic fever, is the worst form of the disease and manifests as: 

• Terrible stomach ache 

• Extreme vomiting 

• A bleeding nose and gums 

• Stool or vomit that is bloody 

• Bruises are a result of internal bleeding. 

• A lot of fatigue 

• Breathing problems, restless 

If a person has dengue virus, an antibody test for dengue fever may be positive. While formulating a diagnosis, a medical professional will take into account a patient's test findings, medical background, and recent travel experiences. 

Preparation and Procedure Required for Dengue Virus IgG Antibodies Test 

With dengue fever, there is no particular medicine. Rest sufficiently and hydrate yourself well. Get medical attention right away if you have a high fever and noticeable dengue symptoms. The dengue IgG blood test is used. Often, a vein in your arm is used to take blood for this test. A needle will be used to reach your (not the) vein of (not of it should be by) you’re (the) pathology lab assistant. To collect the blood, this needle is often joined to a tube or syringe. In 5 to 10 minutes the process is completed. 

Understanding Dengue Virus IgG Antibodies Test Results 

Interpretation 

• IgG negative - no detectable dengue fever virus IgG antibody is present 

• Antibodies with dubious(doubtful) presence are ambiguous. You must repeat the test after 5–10 days for a precise diagnosis. 

• IgG Positive - IgG antibodies to the dengue fever virus were found; this might signify a recent or previous infection. 

Positive IgG tests for dengue antibodies discovered in an initial blood sample indicate that the person was recently infected with the dengue virus. IgG antibody testing can be positive if a person has been infected with a comparable virus, such as chikungunya (called cross-reaction).  

If the IgG is positive but the IgM is low or negative, the individual most certainly once had an infection. A recent infection is expected if the dengue IgG antibody titre multiplies four times or more (for example, from a titre of 1:4 to a titre of 1:64) between two samples obtained two to four weeks apart. 

Negative results from IgM and/or IgG antibody testing might indicate that the person being tested does not have dengue infection and symptoms are caused by another factor, or they could indicate that the antibody level is too low to quantify. The individual may still be infected with dengue.