This test looks for Plasmodium parasites in your blood. The parasites cause malaria, a serious disease that can be fatal if left untreated.

This test checks newborns for PKU, a condition that can cause brain damage and severe intellectual disability if not treated.

This blood test checks the level of phosphorus in your body.

This test checks the level of the seizure medicine phenytoin (Dilantin) in your blood.

This test measures the amount of the medicine phenobarbital in your blood. Phenobarbital is used to treat epilepsy.

This test checks for a current or past infection with the virus that causes fifth disease in children.

The test looks for HIV-1 antibodies in your blood. Your body makes these antibodies when you have been exposed to HIV, the virus that causes AIDS.

This test looks for which type of herpes simplex virus is causing your infection.

This is a blood test to find out how much hemoglobin is in your blood. You may need this test if you have anemia or symptoms of anemia.

This test measures how much of your blood is made up of red blood cells. Too many or too few red blood cells can cause health problems.