CDC YAZISI İNGİLİZCE
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1. Laboratories should conduct initial testing for HIV with an FDA-approved antigen/antibody
combination immunoassaya that detects HIV-1 and HIV-2 antibodies and HIV-1 p24 antigen to screen
for established infection with HIV-1 or HIV-2 and for acute HIV-1 infection. No further testing is
required for specimens that are nonreactive on the initial immunoassay.
2. Specimens with a reactive antigen/antibody combination immunoassay result (or repeatedly reactive, if
repeat testing is recommended by the manufacturer or required by regulatory authorities) should be
tested with an FDA-approved antibody immunoassay that differentiates HIV-1 antibodies from HIV-2
antibodies. Reactive results on the initial antigen/antibody combination immunoassay and the HIV-
1/HIV-2 antibody differentiation immunoassay should be interpreted as positive for HIV-1 antibodies,
HIV-2 antibodies, or HIV antibodies, undifferentiated.
3. Specimens that are reactive on the initial antigen/antibody combination immunoassay and nonreactive
or indeterminate on the HIV-1/HIV-2 antibody differentiation immunoassay should be tested with an
FDA-approved HIV-1 nucleic acid test (NAT).
• A reactive HIV-1 NAT result and nonreactive HIV-1/HIV-2 antibody differentiation
immunoassay result indicates laboratory evidence for acute HIV-1 infection.
• A reactive HIV-1 NAT result and indeterminate HIV-1/HIV-2 antibody differentiation
immunoassay result indicates the presence of HIV-1 infection confirmed by HIV-1 NAT.
• A negative HIV-1 NAT result and nonreactive or indeterminate HIV-1/HIV-2 antibody
differentiation immunoassay result indicates a false-positive result on the initial immunoassay.b
4. Laboratories should use this same testing algorithm, beginning with an antigen/antibody combination
immunoassay, with serum or plasma specimens submitted for testing after a reactive (preliminary
positive) result from any rapid HIV test.
a Exception: As of April 2014, data are insufficient to recommend use of the FDA-approved single-use rapid HIV-
1/HIV-2 antigen/antibody combination immunoassay as the initial assay in the algorithm.
b See Section M, Additional Considerations, for a discussion of issues related to acute HIV-2 infection.