How It Feels
The blood sample is taken from a vein in
your arm. An elastic band is wrapped around your upper arm. It may feel tight.
You may feel nothing at all from the needle, or you may feel a quick sting or
There is very little chance of problems from
having blood drawn from a vein. You may get a small bruise at the site. You can
lower your chance of bruising by keeping pressure on the site for several
In rare cases, the vein may become swollen after the
blood sample is taken. This problem is called phlebitis. You can use a warm
compress several times a day to treat this.
Ongoing bleeding can be a problem for people with bleeding
disorders. Aspirin, warfarin (Coumadin), and other blood-thinning medicines can
make bleeding more likely. If you have bleeding or clotting problems, or if you
take blood-thinning medicine, tell the doctor before your blood is
toxoplasmosis test is a blood test that checks for
antibodies to the Toxoplasma gondiiparasite. The results of the test are usually given in
titers. A titer is a measure of how much the blood sample can be diluted with a
saltwater solution (saline) before the antibodies can no longer be found. Test
results are usually ready in 1 to 3 days.
A titer of 1 to 8 (1:8)
means that antibodies can be found when 1 part of the blood sample is diluted
by up to 8 parts of a saltwater solution (saline). A larger second number means
there are more antibodies in the blood. So a titer of 1 to 128 means there are
more toxoplasmosis antibodies in the blood than a titer of 1 to 32.
The normal values listed here—called a reference range—are just a guide. These ranges vary from lab to lab, and your lab may have a different range for what’s normal. Your lab report should contain the range that your lab uses. Also, your doctor will evaluate your results based on your health and other factors. This means that a value that falls outside the normal values listed here may still be normal for you or your lab.
IgM in babies:
IgM in adults:
Less than 1:64
Less than 1:1024
Toxoplasmosis antibodies usually form within 2 weeks after
being infected. The titer is the highest 1 to 2 months after infection.
- If high titers of the IgM type of antibody are
found, it means the infection is recent. If high titers of the IgG type of
antibody are present, it means an infection occurred in the
- Blood samples may be taken over several weeks to see if the
number of antibodies is getting higher. This would mean the infection is
- Low titers that do not get higher usually mean the
infection occurred in the past. After you have had toxoplasmosis, you cannot be