These index values can really fluctuate. If you take test several times a day, your index value will fluctuate each time. As long as it is less than 1, you should not be worrying about these values. 2.Known window period for HIV is maximum of 180 days following possible exposure (Usually 3-6 months. Cutoff values is calculated based on values

A study using a variety of HIV-1 seroconversion sample panels, in conjunction with statistical modeling, estimated that half of patients become repeatedly reactive on fourth-generation testing within 18 days after HIV infection; more than 99% have reactive results within 45 days after HIV acquisition.

May 16, 2020 Ā· For some HIV screening assays, the strength of the S/CO value correlates with likelihood that confirmatory testing will be positive. The data in this article provide results from two HIV Ag/Ab combination assays (Abbott Architect HIV Ag/Ab Combo Assay, a 4 th generation combination assay; Bio-Rad Bioplex 2200 HIV Ag-Ab Assay, a 5 th generation
Study design: A total of 30,201 sera were tested for HIV diagnosis using Abbott Architect Ā® HIV-Ag/Ab-Combo 4th-gen-EIA at a hospital in Spain during 17 months. Architect S/CO values were recorded, comparing the HIV-1 positive results following Architect interpretation (S/COā‰„1) with the final HIV-1 diagnosis by confirmatory tests (line
Feb 4, 2022 Ā· indirect antiglobulin test (IAT) ā€” checks for antibodies that are floating in the serum, which is the liquid part of your blood. To do this, your red blood cells are removed from the sample, and
28 yrs old Male asked about Hiv index value, 2 doctors answered this and 389 people found it useful. This is HIV 1/2 and P24 combo test by CMIA method Is this BioPlex 2200 HIV Agā€Ab Assay5th Generation. The BioPlex 2200 HIV Agā€Ab multiplex immunoassay helps you perform the first step of the HIV Testing Algorithm. The assay helps identify HIVā€1 and HIVā€2 infection and acute HIVā€1 infection through the detection of HIVā€1 and HIVā€2 antibodies and HIVā€1 p24 antigen.
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Jul 1, 2021 Ā· Longitudinal ARCHITECT HIV Ag/Ab combo signal-to-cutoff (S/Co) values from recent HIV-1 seroconverters. (A) The S/Co ratios for longitudinally collected specimens from 26 antiretroviral therapy-naive recent seroconverters (N = 198) were plotted over days since estimated seroconversion. The solid red line represents the logarithmic curve fit to
Aug 11, 2014 Ā· Before and after completing the pep on 21, 35 days, I had a hiv combo test with a quick test that gave negative results and on day 50 57 67 81 and 89 I had a hiv combo test s/co: 0.05 < 1 also gave The result is negative, with such a result, is there a high chance that I am infected? Thank you doctor have a good day

Jun 27, 2014 Ā· 1. Nonreactive. Negative for HIV-1 antigen and HIV-1/HIV-2 antibodies. No laboratory evidence of HIV infection. If acute HIV infection is suspected, consider testing for HIV-1 RNA. Reporting this test result is not required. HIV-1/2 Ag/Ab combination immunoassay 2. HIV-1/HIV-2 antibody differentiation immunoassay.

Jul 1, 2021 Ā· Additionally, ARCHITECT Combo S/Co values were compared relative to diagnostic test results from two prior prospective HIV-1 diagnostic studies in order to validate the use of the S/Co for both

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Dr. Sajeev Kumar. The "index value" (also called the "signal-to-cutoff ratio") is a technical term having to do with how this type of hiv-antibody test is conducted. Values less than 0.90, like yours, are definitively negative! values between 0.9 and 1.0 would be equivocal or borderline. And values above 1.0 would be preliminarily positive.

The HIV AG/AB Combo test (CMIA) has come Negative (Value - 0.24) at 8 weeks post exposure. 1) My worry is that the last time (at 45 days) I had got this test done at a different lab, the value was 0.14.
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