Exposure of an individual to a foreign protein (antigen) that provokes an immune response.

acquired immunodeficiency syndrome

Measures the number of CD4+ T cells in the bloodstream of patients with AIDS

herpes simplex virus

abnormal hypersensitivity acquired by exposure to an antigen

The organ in the left upper quadrant of the abdomen destroys worn-out red blood cells, activates lymphocytes, and stores blood.

cryptococcal infection

Screening test to detect anti-HIV antibodies in the bloodstream

immune effector cells- cells activated to defend the body in an immune response

malignant tumor of lymph nodes and lymph tissue

Proteins are secreted by cytotoxic T cells to aid in antigen destruction.

cytomegalovirus infection

Test that separates immunoglobins

protease inhibitor

tumor of the thymus gland

Lymph nodes in the mesentery (intestinal region).

histoplasmosis

Measurement of the amount of AIDS virus in the bloodstream

cytomegalovirus

malignant tumor of cone marrow cells

Lymph nodes near the aorta in the lumbar area of the body.

Mycobacterium avium-intracellulare complex infection

X-ray imaging produces cross-sectional and other views of anatomic structures

granulocyte colony-stimulating factor

follicular lymphoma and large cells lymphoma