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What is Toxoplasma Blood Test?
The Toxoplasma blood test is a laboratory test used to detect an infection with the parasite Toxoplasma gondii. The parasite is spread through contact with cat feces, contaminated soil, or undercooked or raw meat. The test looks for antibodies in the blood, which are made by the body in response to the infection.
Types of Toxoplasma Blood Test
There are two types of Toxoplasma blood tests:
- IgM test: This test looks for the IgM antibody, which is produced within a few weeks of infection.
- IgG test: This test looks for the IgG antibody, which is produced months after infection and will remain in the body for years. It is sometimes used along with the IgM test to get a better understanding of the infection.
Why might the test be performed?
The Toxoplasma blood test is used to detect an infection with the parasite Toxoplasma gondii. It is most often ordered for pregnant women in their first trimester, as the infection can cause harm to the developing baby. It may also be ordered if someone has symptoms of the infection, such as swollen lymph nodes or a fever.
When might the test be ordered?
The Toxoplasma blood test is typically ordered for pregnant women in their first trimester to check for exposure to the parasite. It may also be ordered if someone has symptoms, such as swollen lymph nodes or a fever, that suggest an infection.
How is the sample collected for testing?
A blood sample is taken from a vein in the arm using a needle.
Preparation
No preparation or fasting is needed for this test.
Risks
There is very little risk associated with having a blood sample taken from a vein. The person may experience slight pain or bruising at the site of the needle.
What do the results mean?
A positive result on either the IgM or IgG test means that the person has been infected with the parasite at some point in their life. A positive result on the IgM test indicates a current or recent infection, while a positive result on the IgG test means that the person has been infected in the past. Low levels of IgG antibodies may indicate a recent or current infection.
A negative result means that the person has not been infected or was previously infected but does not have any lasting immunity to the parasite.