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Med_Term Mod14

Lab Tests & Clinical Procedures

CD4+ measures number of CD4+ T cells in blood stream of patients with AIDS
a normal CD4+ count is between 500 & 1500 CD4+ cells/mm3
starting treatment with anti-HIV drugs is recomended is a CD4+ count falls below 250 to 200 CD4+ cells/mm3
ELISA screening test to detect anti-HIV antibodies in bloodstream
within 2 weeks of infection with HIV anitbodies begin to appear
if the result of ELISA is positive, it is confirmed with a Western blot test, which is more specific
Western blot test specific test to detect presence of anti-HIV anitbodies in bloodstream
immunoelectrophoresis test that separates immunoglobulins IgG, IgM, IgE, IgA, IgD
procedure detects presence of abnormal levels of antibodies in patients with conditions such as multiple myeloma, & Waldenstrom macroglobilunemia immunoelectrophoresis
viral load tests tests that measure amount of AIDS virus (HIV) in bloodstream
PCR assay & NASBA test viral load tests
CT scan xray imaging in transverse plane produces cross-sectional views of anatomic structures
shows abnormalities of lymphoid organs, such as spleen, lymph nodes & thymus gland CT scan