Toxoplasma serology; Toxoplasma antibody titer
The toxoplasma blood test looks for antibodies in the blood to a parasite called Toxoplasma gondii.
There is no special preparation for the test.
When the needle is inserted to draw blood, some people may feel moderate pain. Others feel only a prick or stinging. Afterward, there may be some throbbing or a slight bruise. This soon goes away.
The test is done when the health care provider suspects that you have toxoplasmosis. The infection is a danger to a developing baby if a pregnant woman gets infected. It is also dangerous in people with HIV/AIDS.
In pregnant women, the test is done to:
The presence of antibodies before pregnancy probably protects a developing baby against toxoplasmosis at birth. But antibodies that develop during pregnancy may mean the mother and baby are infected. This infection during pregnancy increases the risk for miscarriage or birth defects.
This test may also be done if you have:
Normal results mean you have likely never had a toxoplasma infection.
Normal value ranges may vary slightly among different laboratories. Some labs use different measurements or test different samples. Talk to your provider about the meaning of your specific test result.
Abnormal results mean that you have probably been infected with the parasite. Two types of antibodies are measured, IgM and IgG:
There is little risk involved with having your blood taken. Veins and arteries vary in size from one person to another and from one side of the body to the other. Taking blood from some people may be more difficult than from others.
Other risks associated with having blood drawn are slight, but may include:
Fritsche TR, Pritt BS. Medical parasitology. In: McPherson RA, Pincus MR, eds. Henry's Clinical Diagnosis and Management by Laboratory Methods. 23rd ed. St Louis, MO: Elsevier; 2017:chap 63.
Montoya JG, Boothroyd JC, Kovacs JA. Toxoplasma gondii. In: Bennett JE, Dolin R, Blaser MJ, eds. Mandell, Douglas, and Bennett's Principles and Practice of Infectious Diseases. 9th ed. Philadelphia, PA: Elsevier; 2020:chap 278.BACK TO TOP
Review Date: 8/25/2019
Reviewed By: Jatin M. Vyas, MD, PhD, Assistant Professor in Medicine, Harvard Medical School; Assistant in Medicine, Division of Infectious Disease, Department of Medicine, Massachusetts General Hospital, Boston, MA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.
The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- 2021 A.D.A.M., a business unit of Ebix, Inc. Any duplication or distribution of the information contained herein is strictly prohibited.