This test looks at sputum, or the mucus from your lower airways. It finds out whether you have a lung infection caused by a certain organism.

This test looks for microorganisms in a sample of secretions from your genital area. Mycoplasma may be a sign of infection or a sexually transmitted infection.

This test looks for antibodies to the mumps virus in your blood. Mumps is a contagious disease that often begins with flu-like symptoms.

This test looks for bacteria called methicillin-resistant Staphylococcus aureus (MRSA) in a fluid sample from your body.

This test looks for signs in your blood that you have the Epstein-Barr virus, the virus that causes mono.

This test looks for antibodies to 3 diseases: measles, mumps, and rubella.

This test measures the levels of Helicobacter pylori antibodies in your blood. The test can help find out whether your peptic ulcers are caused by these bacteria.

This test finds out if you have low levels of a particular enzyme that can cause hemolytic anemia.

This test measures the level of free T4 in your blood. It helps your health care provider know how well your thyroid is working.

This test looks for antibodies to a parasite that causes the disease amebiasis. This disease is more common in tropical countries with poor sanitation.