"Is a Positive Dengue IgM Antibody Result Indicative of Dengue?"

Update Date: 2024-08-27 Source: Network

A positive IgM antibody for dengue fever indicates that the patient is in the early stage of dengue virus infection. If the IgG antibody is positive, it represents a past infection with the dengue virus.

1. Positive IgM Antibody:

IgM antibody is an acute-phase reactive antibody that typically appears 2-3 days after infection and has a relatively short duration. A positive IgM antibody indicates that the patient is in the early stage of dengue virus infection and requires isolation treatment.

2. Positive IgG Antibody:

IgG antibody is immunoglobulin G, a protective antibody produced by secondary immune response. It usually appears 7-15 days after infection and can persist for months or longer. Therefore, a positive IgG antibody suggests a past infection with the dengue virus, and there is no current dengue virus infection in the body. No special treatment is required at this time; rest and hydration are sufficient.

3. Other Scenarios:

If both IgM and IgG are negative, it indicates no prior infection with the dengue virus. However, if only IgM is positive, it may be a false positive result, and it is recommended to repeat the test after a period of time. After being diagnosed with dengue fever, patients need to follow the doctor's instructions to use antiviral drugs such as Ribavirin. Additionally, they should rest in bed, replenish fluids, and ensure good indoor air ventilation.

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