scholarly journals Indeterminate rapid HIV-1 test results among antenatal and postnatal mothers

2009 ◽  
Vol 20 (11) ◽  
pp. 790-792 ◽  
Author(s):  
D Matemo ◽  
J Kinuthia ◽  
F John ◽  
M Chung ◽  
C Farquhar ◽  
...  
Keyword(s):  
Test Results ◽  
Postnatal Mothers ◽  
Hiv 1

scholarly journals Routine HIV Test Results in 6 US Clinical Laboratories Using the Recommended Laboratory HIV Testing Algorithm With Geenius HIV 1/2 Supplemental Assay

2020 ◽  
Vol 47 ◽  
pp. S13-S17 ◽  
Author(s):  
Laura G. Wesolowski ◽  
Pollyanna R. Chavez ◽  
Ana María Cárdenas ◽  
Alex Katayev ◽  
Patricia Slev ◽  
...  
Keyword(s):  
Hiv Testing ◽  
Test Results ◽  
Clinical Laboratories ◽  
Hiv Test ◽  
Testing Algorithm ◽  
Hiv 1

INCIDENCE OF HIV-1 AND HIV-2 ANTIBODIES IN HEMOPHILIACS

1987 ◽  
Author(s):  
W Schramm ◽  
L G Gürtler ◽  
H Pohlmann ◽  
I Weigel ◽  
J Eberie ◽  
...  
Keyword(s):  
The Other ◽  
Clotting Factor ◽  
Test Results ◽  
Clotting Factors ◽  
Negative Results ◽  
Group 12 ◽  
Hiv Test ◽  
In The Beginning ◽  
Anti Hiv ◽  
Hiv 1

The presence of antibodies to HIV-1 (anti-HIV-1) was tested in 167 hemophiliacs surveyed and treated at Munich hemophilia center. Increasing numbers of HIV infected patients were observed in the years 1981 to 1986 from 0% to 51,5% (86 positive patients in January 1987 of 167 followed patients). Most of the seroconver-sions occured between 1982 and 1984. The 150 clinically severe affected hemophiliacs (F-VIII-levels up to 5% and need of replacement therapy) showed positive HIV-test results in 55,3% (83 patients) and negative results in 44,7% (67 patients). 5 patients died since 1981, one because of AIDS. 17 patients were not seen since 1984, 14 of those belong to the severly affected group, 12 of them were negative. Since spring 1985 only heat or chemically treated clotting factor preparations are used for substitution. Despite this still 5 seroconversions were observed. Two may be attributed to the use of a preparation heat inactivated in dry state, this preparation is no longer used. The other 3 seroconversions possibly were caused by an occasional use of an noninactivated preparation in the beginning of the change to inactivated clotting factor preparations. 38 of the anti-HIV-1 positive sera were tested for the presence of HIV-2 antibodies also. The methods were ELISA,immunofluorescence and immunoblot. HIV-2 (LAV-2) for these tests was kindly provided by L. Montagnier. Antibodies specific for HIV-2 antigens were not detected, but crossreactions were observed between anti-HIV-1 with HIV-2 antigens particularly epitopes on HIV-2-p27.The data indicate that the use of adequately inactivated clotting factors can prevent infection of hemophilia patients by this route and that HIV-2 was not present in the clotting factor preparations used for the substitution of this group of patients. The incidence of full blown AIDS since 1981 in our group of hemophiliacs is still low (1,2%).

scholarly journals 1782. Real-World HIV Diagnostic Testing Patterns in the United States

2019 ◽  
Vol 6 (Supplement_2) ◽  
pp. S656-S656
Author(s):  
James Karichu ◽  
Mindy Cheng ◽  
Pedro Rodriguez ◽  
Nicole Robinson ◽  
Chakkarin Burudpakdee ◽  
...  
Keyword(s):  
Real World ◽  
Index Date ◽  
Clinical Laboratory ◽  
The United States ◽  
Fourth Generation ◽  
Test Results ◽  
Confirmatory Testing ◽  
Confirmatory Tests ◽  
Testing Patterns ◽  
Hiv 1

Abstract Background Current HIV diagnostic laboratory testing guidelines from the US Centers for Disease Control and Prevention (CDC) recommend a sequence of tests for detection, differentiation, and confirmation of HIV-1 and HIV-2 diagnosis. There is a gap in knowledge about real-world implementation of the testing algorithm. The aim of this study was to characterize the population that underwent HIV antibody differentiation and confirmatory testing and to describe subsequent testing patterns from a large US clinical laboratory database. Methods Patients who received one or more HIV-1/2 antibody differentiation test (BioRad Geenius™ HIV 1/2 Supplemental Assay [Geenius]) in the Quest Diagnostics laboratory database between January 1, 2017 and December 31, 2017 were selected into the study; earliest test date was index date. Geenius tests, HIV-1 qualitative RNA (Aptima HIV-1 RNA Qualitative Assay [Aptima]), and HIV-2 DNA/RNA confirmatory tests subsequent to index date were captured. Study measures included pt demographic characteristics, testing frequency and sequencing, and test results. For patients with >1 Geenius test in 2017, concordance between index and subsequent test results was assessed. Results There were 26,319 unique patients identified who received ≥1 HIV antibody differentiation result from the Geenius assay. Mean age was 40.7 ± 14.3 years, 66.4% were male, and 42.5% were from southern states. Among the study population, there were 28,954 Geenius, 7,234 Aptima, and 298 HIV-2 DNA/RNA confirmatory tests. 26.4% of Geenius test results were discordant with the initial positive fourth-generation HIV screening results and required subsequent confirmatory testing. In terms of sequencing, the CDC-recommended HIV diagnostic algorithm was followed 74% of the time after screening. 8.5% of patients had >1 Geenius test in 2017; 11.2% of the retests returned different results compared with the first test. Conclusion The CDC recommended algorithm for HIV diagnosis is complex for laboratories to implement and currently available assays do not support testing efficiency. To mitigate observed inefficiencies and reduce the laboratory burden of HIV testing, a more accurate and reliable approach for HIV differentiation and confirmatory testing is needed. Disclosures All authors: No reported disclosures.

HIV-1 testing in pregnancy: acceptability and correlates of return for test results

AIDS ◽  
2000 ◽  
Vol 14 (10) ◽  
pp. 1468-1470 ◽  
Author(s):  
James Kiarie ◽  
Ruth Nduati ◽  
Kamau Koigi ◽  
Janet Musia ◽  
Grace John
Keyword(s):  
Test Results ◽  
Hiv 1 ◽  
In Pregnancy

scholarly journals Prospective Evaluation of HIV Testing Technologies in a Clinical Setting: Protocol for Project DETECT (Preprint)

2019 ◽  
Author(s):  
Joanne D Stekler ◽  
Lauren R Violette ◽  
Hollie A Clark ◽  
Sarah J McDougal ◽  
Lisa A Niemann ◽  
...  
Keyword(s):  
Hiv Infection ◽  
Prospective Study ◽  
Hiv Testing ◽  
Transmitted Disease ◽  
The United States ◽  
Test Results ◽  
Cross Sectional ◽  
Hiv Test ◽  
Hiv Acquisition ◽  
Hiv 1

BACKGROUND HIV testing guidelines provided by the Centers for Disease Control and Prevention (CDC) are continually changing to reflect advancements in new testing technology. Evaluation of existing and new point-of-care (POC) HIV tests is crucial to inform testing guidelines and provide information to clinicians and other HIV test providers. Characterizing the performance of POC HIV tests using unprocessed specimens can provide estimates for the window period of detection, or the time from HIV acquisition to test positivity, which allows clinicians and other HIV providers to select the appropriate POC HIV tests for persons who may be recently infected with HIV. OBJECTIVE This paper describes the protocols and procedures used to evaluate the performance of the newest POC tests and determine their sensitivity during early HIV infection. METHODS Project DETECT is a CDC-funded study that is evaluating POC HIV test performance. Part 1 is a cross-sectional, retrospective study comparing behavioral characteristics and HIV prevalence of the overall population of the Public Health–Seattle & King County (PHSKC) Sexually Transmitted Disease (STD) Clinic to Project DETECT participants enrolled in part 2. Part 2 is a cross-sectional, prospective study evaluating POC HIV tests in real time using unprocessed whole blood and oral fluid specimens. A POC nucleic acid test (NAT) was added to the panel of HIV tests in June 2018. Part 3 is a longitudinal, prospective study evaluating seroconversion sensitivity of POC HIV tests through serial follow-up testing. For comparison, HIV-1 RNA and HIV-1/HIV-2 antigen/antibody tests are also performed for participants enrolled in part 2 or 3. A behavioral survey that collects information about demographics, history of HIV testing, STD history, symptoms of acute HIV infection, substance use, sexual behaviors in the aggregate and with recent partners, and use of pre-exposure prophylaxis and antiretroviral therapy is completed at each part 2 or 3 visit. RESULTS Between September 2015 and March 2019, there were 14,990 Project DETECT–eligible visits (part 1) to the PHSKC STD Clinic resulting in 1819 part 2 Project DETECT study visits. The longitudinal study within Project DETECT (part 3) enrolled 27 participants with discordant POC test results from their part 2 visit, and 10 (37%) were followed until they had fully seroconverted with concordant positive POC test results. Behavioral survey data and HIV test results, sensitivity, and specificity will be presented elsewhere. CONCLUSIONS Studies such as Project DETECT are critical for evaluating POC HIV test devices as well as describing characteristics of persons at risk for HIV acquisition in the United States. HIV tests in development, including POC NATs, will provide new opportunities for HIV testing programs. INTERNATIONAL REGISTERED REPORT RR1-10.2196/16332

Viral Load Test Reports

2001 ◽  
Vol 125 (12) ◽  
pp. 1546-1554
Author(s):  
Diane P. Francis ◽  
K. Michael Peddecord ◽  
Louise K. Hofherr ◽  
J. Rex Astles ◽  
William O. Schalla
Keyword(s):  
Viral Load ◽  
Telephone Survey ◽  
Health Department ◽  
Load Test ◽  
Load Testing ◽  
Test Results ◽  
Viral Load Testing ◽  
Viral Load Test ◽  
Test Kit ◽  
Hiv 1

Abstract Context.— Human immunodeficiency virus (HIV) RNA testing (viral load testing) is increasingly important in the care of patients infected with HIV-1 to determine when to initiate, monitor, and change antiretroviral therapy. Patient viral load testing information is communicated to the clinician through the laboratory test report. Objectives.—To examine the format and information used in reporting viral load testing results and determine the clarity of the information provided in these reports. Design.—Patient test reports with all personal identifiers removed were requested of viral load testing laboratories participating in a telephone survey of laboratory practices. Hospital, independent, health department, and “other type” laboratories identified as university-associated laboratories participated in the telephone survey. Results.—Thirty-seven unique test reports were collected. All laboratories reported results in copies/mL, while 14% also reported results as “log10 copies/mL.” The test kit was identified by only 24% of the laboratories. Reportable ranges were specified by 70% of the laboratories, but there was considerable variation in terminology. One laboratory reported a viral load copy number below the manufacturer's test kit lower limit of sensitivity. The layout and format differed among reports. Some results were expressed in log10, others contained nonsignificant integers, while others contained exponential numbers. Supplemental information in some reports included previous patient test results and significance of changes from baseline. The format of some reports made it difficult to read the report information and interpret the testing results. Conclusion.—This study emphasizes the importance of standardizing the reporting of HIV-1 viral load test results to minimize result misinterpretation and incorrect treatment.

scholarly journals Molecular Confirmation of Human Immunodeficiency Virus (HIV) Type 2 in HIV-Seropositive Subjects in South India

2000 ◽  
Vol 7 (6) ◽  
pp. 987-989 ◽  
Author(s):  
R. Kannangai ◽  
S. Ramalingam ◽  
K. J. Prakash ◽  
O. C. Abraham ◽  
R. George ◽  
...  
Keyword(s):  
Human Immunodeficiency Virus ◽  
Dual Infection ◽  
Test Results ◽  
Three Samples ◽  
Immunodeficiency Virus ◽  
Hiv Seropositive ◽  
Hiv 1 ◽  
Chiron Corporation

ABSTRACT Nested PCRs for human immunodeficiency virus type 1 (HIV-1) and HIV-2 were compared with immunoblot test results. Twelve of 13 immunoblot-positive HIV-2 samples were positive by PCR. There were five INNO-LIA (Innogenetics, Zwijnaarde, Belgium) and/or HIVBLOT 2.2 (Genelabs, Singapore) samples that tested positive for dual infection. HIV-1 PCR was positive in all samples, while HIV-2 PCR was positive in two and RIBA (Chiron Corporation, San Diego, Calif.) was positive for HIV-2 in three samples. Thus the prevalence of HIV-2 is accurately estimated by the use of immunoblotting, but that of HIV-1 and -2 dual infection may be overestimated.

scholarly journals Absence of routine molecular testing and prevalence of HIV-2 infection in regions hardest-hit by HIV infection

2012 ◽  
Vol 6 (12) ◽  
pp. 854-859 ◽  
Author(s):  
Joseph C Forbi ◽  
Mathew D Esona ◽  
Hellen O Iperepolu ◽  
Moses P Adoga ◽  
Simon M Agwale
Keyword(s):  
Hiv Infection ◽  
Sex Workers ◽  
False Negative ◽  
Rapid Test ◽  
Molecular Testing ◽  
Test Results ◽  
Active Population ◽  
Hiv Test ◽  
In Series ◽  
Hiv 1

Introduction: Investigating the incidence and dynamics of HIV-2 and false-negative HIV test results in a highly sexually active population where frequent opportunities exist for acquiring and transmitting infections provides additional understanding of the epidemiology of the virus in Africa. Methodology: The HIV status of 900 active female sex workers (FSWs) was determined using two lateral flow rapid assays in series. The second rapid test device incorporates type-specific recombinant peptides that discriminate between HIV-1 and HIV-2 infection. HIV sero-negative samples were re-tested for HIV infection and their viral loads determined using the NucliSENS real-time nucleic acid sequence-based amplification (NASBA) platform. Results: In total, 335 FSWs were determined to be HIV positive, the majority (227; 67.8%) of whom were between the ages of 20 and 30 years. Eighteen (5.4%) were found to have evidence of HIV-2 infection, 17 of whom were co-infected with HIV-1. Only one HIV-2 mono-infection was observed. Out of 565 HIV-negative individuals determined by serology, 11(1.9%; p>0.05) were found to be HIV-1 positive when tested via the NASBA platform. Conclusion: False negative test results, HIV-2 infection, and complex transmission networks among FSWs may aid in fueling the HIV epidemic in the Nigerian population. These findings demonstrate the need to reevaluate the quality of HIV serological diagnostics, control services, and stress the need for widespread introduction of molecular testing among high-risk populations in the country.

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