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Hiv incidence assay

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https://www.readbyqxmd.com/read/28443672/heightened-hiv-antibody-responses-in-postpartum-women-as-exemplified-by-recent-infection-assays-implications-for-incidence-estimates
#1
John Hargrove, Cari van Schalkwyk, Jean Humphrey, Kuda Mutasa, Robert Ntozini, Michele Owen, Silvina Masciotra, Bharat Parekh, Yen T Duong, Trudy Dobbs, Peter Kilmarx, Elizabeth Gonese
BACKGROUND: Laboratory assays that identify recent HIV infections are important for assessing impacts of interventions aimed at reducing HIV incidence. Kinetics of HIV humoral responses can vary with inherent assay properties, and between HIV subtypes, populations and physiological states. They are important in determining mean duration of recent infection (MDRI) for antibody-based assays for detecting recent HIV infections. METHODS: We determined MDRIs for BED-CEIA, LAg and BRAI assays for 101 seroconverting postpartum women, recruited in Harare in 1997- 2000 during the Zimbabwe Vitamin A for Mothers and Babies (ZVITAMBO) Trial, comparing them against published MDRIs estimated from seroconverting cases in the general population...
April 26, 2017: AIDS Research and Human Retroviruses
https://www.readbyqxmd.com/read/28408224/one-drug-for-two-targets-biological-evaluation-of-antiretroviral-agents-endowed-with-antiproliferative-activity
#2
Lorenzo Botta, Giorgio Maccari, Pierpaolo Calandro, Marika Tiberi, Annalaura Brai, Claudio Zamperini, Filippo Canducci, Mario Chiariello, Rosa Martí-Centelles, Eva Falomir, Miguel Carda
AIDS-related cancer diseases are malignancies with low incidence on healthy people that affect mostly subjects already immunocompromised. The connection between HIV/AIDS and these cancers has not been established yet, but a weakened immune system is certainly the main cause. We envisaged the possibility to screen a small library of compounds synthesized in our laboratory against opportunistic tumors mainly due to HIV infection like Burkitt's Lymphoma. From cellular assays and gene expression analysis we identified two promising compounds...
April 1, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28400821/the-great-impostor-transaminitis-masking-the-coinfection-of-syphilis-and-human-immunodeficiency-virus
#3
Sunit Tolia, Hassan Kassem, Ana Capatina-Rata
Introduction. The incidence of syphilis continues to rise in the United States over the past 15 years. This disease process is classified into stages and may present with a coinfection of Human Immunodeficiency Virus (HIV). Case Report. We present a case of a 32-year-old African American male who presented with cutaneous manifestations of secondary syphilis and transaminitis. A workup revealed that the transaminitis was secondary to underlying syphilitic hepatitis in the presence of HIV coinfection. The patient had a reactive rapid plasma reagin (RPR) of 1 : 64 TU and reactive Treponema pallidum particle agglutination assay (TPPA)...
2017: Case Reports in Medicine
https://www.readbyqxmd.com/read/28389206/residual-risk-of-hiv-hcv-and-hbv-in-canada
#4
Sheila F O'Brien, Qi-Long Yi, Wenli Fan, Vito Scalia, Mindy Goldman, Margaret A Fearon
BACKGROUND: Residual risk is estimated as the product of the incidence and the infectious window period, the time during which a blood donation could be infectious but the assay may not detect it. In 2011 nucleic acid multiplex testing (MPX) was implemented in 6 unit minipools (previously 24 unit minipools). MPX also included hepatitis B (HBV) NAT for the first time (complementing HBsAg screening) in addition to HIV-1 and hepatitis C (HCV) as before. We aimed to estimate window period risk-day equivalents for MPX, and the residual risk of viral infections in blood donations updated to reflect current incidence and testing...
March 18, 2017: Transfusion and Apheresis Science
https://www.readbyqxmd.com/read/28369198/contribution-of-serology-assays-in-the-evaluation-of-influenza-virus-infection-rates-and-vaccine-efficacy-in-pregnant-women-report-from-randomized-controlled-trials
#5
Shabir A Madhi, Marta Nunes, Adriana Weinberg, Locadiah Kuwanda, Andrea Hugo, Stephanie Jones, Nadia van Niekerk, Justin R Ortiz, Kathleen M Neuzil, Keith P Klugman, Eric A F Simoes, Clare L Cutland
Background: The utility of serological testing to evaluate vaccine efficacy of seasonal inactivated influenza vaccine (IIV) is controversial. We aimed to evaluate the efficacy of IIV against serologically-diagnosed influenza infection (SDI), and reverse-transcription polymerase chain reaction confirmed influenza illness (PCR-CI) in women vaccinated during pregnancy. Methods: We undertook a post-hoc analysis of two randomized clinical trials evaluating IIV efficacy among HIV-uninfected and HIV-infected pregnant women...
March 21, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28364412/the-validation-and-evaluation-of-anti-hiv-testing-algorithm-used-in-mobile-clinic-setting-for-men-who-have-sex-with-men-in-metropolitan-bangkok-thailand
#6
Tippawan Pankam, Sarun Saensiriphan, Suphackok Areeyolwattana, Napapat Barisri, Supabhorn Pengnonyang, Sunee Sirivichayakul, Nittaya Phanuphak, Praphan Phanuphak
BACKGROUND: Same-day anti-HIV testing algorithm is recommended by Thai National Guidelines. We compared performance characteristics of algorithms used in a mobile clinic and a facility-based clinic for men who have sex with men (MSM) in Bangkok. METHODS: Mobile clinic samples collected from 4 saunas and 2 spa venues were tested by Alere DetermineTM HIV 1/2, followed by DoubleCheck GoldTM Ultra HIV 1/2 and SD Bioline HIV 1/2 3.0. All samples were re-tested at the Thai Red Cross Anonymous Clinic (TRCAC) by Architect HIV Ag/Ab or Elecsys HIV combi PT, followed by Alere DetermineTM HIV 1/2 and Serodia HIV 1/2...
April 1, 2017: Asian Pacific Journal of Allergy and Immunology
https://www.readbyqxmd.com/read/28318310/comparison-of-maxim-and-sedia-limiting-antigen-assay-performance-for-measuring-hiv-incidence
#7
Katherine E Schlusser, Jacob Konikoff, Allison R Kirkpatrick, Charles Morrison, Tsungai Chipato, Pai-Lien Chen, Marshall Munjoma, Susan H Eshleman, Oliver Laeyendecker
Accurate methods for cross-sectional incidence estimation are needed for HIV prevention research. The Limiting Antigen Avidity (LAg-Avidity) assay has been marketed by two vendors, Maxim Biomedical and Sedia BioSciences Corporation. Performance differences between the two versions of the assay are unknown. We tested a total 1,410 treatment-naive samples with both versions of the assay. The samples came from 176 seroconverters from the Zimbabwe Hormonal Contraception and HIV Study. The correlation between the two versions of the assay was 0...
March 20, 2017: AIDS Research and Human Retroviruses
https://www.readbyqxmd.com/read/28231277/comparison-of-cross-sectional-hiv-incidence-assay-results-from-dried-blood-spots-and-plasma
#8
Katherine E Schlusser, Christopher Pilcher, Esper G Kallas, Breno R Santos, Steven G Deeks, Shelley Facente, Sheila M Keating, Michael P Busch, Gary Murphy, Alex Welte, Thomas Quinn, Susan H Eshleman, Oliver Laeyendecker
BACKGROUND: Assays have been developed for cross-sectional HIV incidence estimation using plasma samples. Large scale surveillance programs are planned using dried blood spot (DBS) specimens for incidence assessment. However, limited information exists on the performance of HIV cross-sectional incidence assays using DBS. METHODS: The assays evaluated were: Maxim HIV-1 Limiting Antigen Avidity EIA (LAg-Avidity), Sedia HIV-1 BED-Capture EIA (BED-CEIA), and CDC modified BioRad HIV-1/2 Plus O Avidity-based Assay (CDC-BioRad Avidity) using pre-determined cutoff values...
2017: PloS One
https://www.readbyqxmd.com/read/28222702/the-virological-durability-of-first-line-art-among-hiv-positive-adult-patients-in-resource-limited-settings-without-virological-monitoring-a-retrospective-analysis-of-dart-trial-data
#9
David I Dolling, Ruth L Goodall, Michael Chirara, James Hakim, Peter Nkurunziza, Paula Munderi, David Eram, Dinah Tumukunde, Moira J Spyer, Charles F Gilks, Pontiano Kaleebu, David T Dunn, Deenan Pillay
BACKGROUND: Few low-income countries have virological monitoring widely available. We estimated the virological durability of first-line antiretroviral therapy (ART) after five years of follow-up among adult Ugandan and Zimbabwean patients in the DART study, in which virological assays were conducted retrospectively. METHODS: DART compared clinically driven monitoring with/without routine CD4 measurement. Annual plasma viral load was measured on 1,762 patients. Analytical weights were calculated based on the inverse probability of sampling...
February 21, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28215501/serial-quantiferon-testing-and-tuberculosis-disease-risk-among-young-children-an-observational-cohort-study
#10
Jason R Andrews, Elisa Nemes, Michele Tameris, Bernard S Landry, Hassan Mahomed, J Bruce McClain, Helen A Fletcher, Willem A Hanekom, Robin Wood, Helen McShane, Thomas J Scriba, Mark Hatherill
BACKGROUND: The value of quantitative interferon-γ release assay results for predicting progression from Mycobacterium tuberculosis infection to active disease is unknown. We aimed to investigate the relation between QuantiFERON-TB Gold In-Tube (QFT) conversion interferon-γ values and risk of subsequent active tuberculosis disease and of QFT reversion. METHODS: We analysed data from a reported vaccine efficacy trial of the tuberculosis vaccine MVA85A in South Africa...
April 2017: Lancet Respiratory Medicine
https://www.readbyqxmd.com/read/28193090/estimating-false-recent-classification-for-the-limiting-antigen-avidity-eia-and-bed-capture-enzyme-immunoassay-in-vietnam-implications-for-hiv-1-incidence-estimates
#11
Neha S Shah, Yen T Duong, Linh-Vi Le, Nguyen Anh Tuan, Bharat S Parekh, Hoang Thi Thanh Ha, Quang Duy Pham, Cao Thi Thu Cuc, Trudy Dobbs, Tran Hong Tram, Truong Thi Xuan Lien, Nick Wagar, Chunfu Yang, Amy Martin, Mitchell Wolfe, Nguyen Tran Hien, Andrea A Kim
Laboratory tests that can distinguish recent from long-term HIV infection are used to estimate HIV incidence in a population, but can potentially misclassify a proportion of long-term HIV infections as recent. Correct application of an assay requires determination of the proportion false recents (PFRs) as part of the assay characterization and for calculating HIV incidence in a local population using a HIV incidence assay. From April 2009 to December 2010, blood specimens were collected from HIV-infected individuals attending nine outpatient clinics (OPCs) in Vietnam (four from northern and five from southern Vietnam)...
March 13, 2017: AIDS Research and Human Retroviruses
https://www.readbyqxmd.com/read/28185617/mycobacterium-kansasii
#12
James C Johnston, Leslie Chiang, Kevin Elwood
The incidence of Mycobacterium kansasii varies widely over time and by region, but this organism remains one of the most clinically relevant isolated species of nontuberculous mycobacteria. In contrast to other common nontuberculous mycobacteria, M. kansasii is infrequently isolated from natural water sources or soil. The major reservoir appears to be tap water. Infection is likely acquired through the aerosol route, with low infectivity in regions of endemicity. Human-to-human transmission is thought not to occur...
January 2017: Microbiology Spectrum
https://www.readbyqxmd.com/read/28159730/hiv-trends-in-the-united-states-diagnoses-and-estimated-incidence
#13
H Irene Hall, Ruiguang Song, Tian Tang, Qian An, Joseph Prejean, Patricia Dietz, Angela L Hernandez, Timothy Green, Norma Harris, Eugene McCray, Jonathan Mermin
BACKGROUND: The best indicator of the impact of human immunodeficiency virus (HIV) prevention programs is the incidence of infection; however, HIV is a chronic infection and HIV diagnoses may include infections that occurred years before diagnosis. Alternative methods to estimate incidence use diagnoses, stage of disease, and laboratory assays of infection recency. Using a consistent, accurate method would allow for timely interpretation of HIV trends. OBJECTIVE: The objective of our study was to assess the recent progress toward reducing HIV infections in the United States overall and among selected population segments with available incidence estimation methods...
February 3, 2017: JMIR Public Health and Surveillance
https://www.readbyqxmd.com/read/28152432/rates-and-determinants-of-incidence-and-clearance-of-cervical-hpv-genotypes-among-hiv-seropositive-women-in-pune-india
#14
Arati Mane, Vikrant V Sahasrabuddhe, Amit Nirmalkar, Arun R Risbud, Seema Sahay, Ramesh A Bhosale, Sten H Vermund, Sanjay M Mehendale
BACKGROUND: Several studies in recent years have documented the genotype-specific prevalence of HPV infection and wide diversity and multiplicity of HPV genotypes among HIV-seropositive women. Yet, information on changes in HPV genotype-specific incidence and clearance rates over time, and their correlation with clinical or immunologic factors among HIV-seropositive women is scarce. OBJECTIVES: We conducted a prospective study to investigate the incidence and clearance rates of cervical HPV genotypes among HIV-seropositive women in India and expand the evidence base in this area of research...
March 2017: Journal of Clinical Virology: the Official Publication of the Pan American Society for Clinical Virology
https://www.readbyqxmd.com/read/28141782/effect-of-pregnancy-on-interferon-gamma-release-assay-and-tuberculin-skin-test-detection-of-latent-tb-infection-among-hiv-infected-women-in-a-high-burden-setting
#15
Sylvia M LaCourse, Lisa M Cranmer, Daniel Matemo, John Kinuthia, Barbra A Richardson, David J Horne, Grace John-Stewart
BACKGROUND: Peripartum immunologic changes may affect latent tuberculosis infection (LTBI) diagnostic performance among HIV-infected women. METHODS: HIV-infected women were serially tested with tuberculin skin test (TST) and interferon gamma release assay [QuantiFERON TB Gold In-tube (QFT)] in pregnancy and 6 weeks postpartum in Kenya. Prevalence, sensitivity and agreement, and correlates of QFT/TST positivity were assessed. Quantitative QFT mitogen and Mycobacterium tuberculosis antigen (Mtb-Ag) responses were compared by peripartum stage...
May 1, 2017: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/28126023/dynamic-changes-in-biomarkers-in-acute-human-immunodeficiency-virus-infections-a-case-report
#16
Wei-Ming Gu, Yi Hu, Wei-Zhong Hu, Biao Xu
BACKGROUND: The highest incidence of human immunodeficiency virus infection in China is among men who have sex with men. This case report aims to describe the dynamic changes in biomarkers in an acute human immunodeficiency virus infection of a Han Chinese man who has sex with men, and to illustrate the possibility of using these biomarkers for the early detection of human immunodeficiency virus infection in Chinese hospital settings. CASE PRESENTATION: The 25-year-old Han Chinese male patient presented himself with an 8-day history of symptoms and signs of upper respiratory viral infections to a sexually transmitted infection clinic of a hospital setting in Shanghai...
January 26, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28126016/seroprevalence-of-toxoplasma-gondii-and-associated-risk-factors-among-hiv-infected-women-within-reproductive-age-group-at-mizan-aman-general-hospital-southwest-ethiopia-a-cross-sectional-study
#17
Ayalew Jejaw Zeleke, Yayehirad Alemu Melsew
BACKGROUND: Toxoplasmosis is serious in the case of immune suppression and prenatal transmission. In immunocompromised hosts, it is manifested primarily as a life-threatening condition, toxoplasmic encephalitis. Congenital toxoplasmosis results in abortion or congenitally acquired disorders which primarily affect the central nervous system. This study assessed seroprevalence of Toxoplasma gondii (T. gondii) infection and associated factors among HIV-infected women within the reproductive age group (18-49 years) at Mizan Aman General Hospital, Southwest Ethiopia...
January 26, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28121669/human-papillomavirus-antibody-response-following-haart-initiation-among-msm
#18
Jean-Damien Combes, Gary M Clifford, Matthias Egger, Matthias Cavassini, Hans H Hirsch, Christoph Hauser, Alexandra Calmy, Patrick Schmid, Enos Bernasconi, Huldrych F Günthard, Silvia Franceschi, Tim Waterboer, Alexandra U Scherrer
OBJECTIVE: To describe effects of HAART on high-risk human papillomavirus (HPV) antibody response in HIV-positive MSM and the meaning of this response for subsequent HPV-related cancer risk. DESIGN: Prospective seroepidemiological study of 281 HIV-positive MSM initiating HAART between 1995 and 2004 in the Swiss HIV Cohort Study. METHODS: For each individual, two serum samples, one at HAART initiation (pre-HAART) and another 24 months later (post-HAART), were tested for L1 antibodies to HPV6, 11, 16, 18, 31, 33, 35, 45, 52 and 58, as well as HPV16-E6 antibodies, using a multiplex serology assay...
February 20, 2017: AIDS
https://www.readbyqxmd.com/read/28061822/cardiovascular-risk-and-endothelial-function-in-people-living-with-hiv-aids-design-of-the-multi-site-longitudinal-endoafrica-study-in-the-western-cape-province-of-south-africa
#19
Hans Strijdom, Patrick De Boever, Gerhard Walzl, M Faadiel Essop, Tim S Nawrot, Ingrid Webster, Corli Westcott, Nyiko Mashele, Frans Everson, Stephanus T Malherbe, Kim Stanley, Harald H Kessler, Evelyn Stelzl, Nandu Goswami
BACKGROUND: There is growing evidence of an interaction between HIV-infection, anti-retroviral therapy (ART) and cardiovascular diseases (CVD). Epidemiological studies in Europe and North America have been observing a shift towards an increased incidence of coronary heart disease and acute myocardial infarctions in HIV-infected populations compared to the general population even after adjusting for traditional cardiovascular risk factors. Despite South Africa (and sub-Saharan Africa, SSA) being regarded as the epicentre of the global HIV epidemic, very little is known about the prevalence of cardiovascular risk factors and precursors of vascular disease in HIV-infected populations in this region...
January 7, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28059955/diagnosis-of-opportunistic-infections-hiv-co-infections-tuberculosis
#20
Lesley Scott, Pedro da Silva, Catharina C Boehme, Wendy Stevens, Christopher M Gilpin
PURPOSE OF REVIEW: Tuberculosis (TB) incidence has declined ∼1.5% annually since 2000, but continued to affect 10.4 million individuals in 2015, with 1/3 remaining undiagnosed or underreported. The diagnosis of TB among those co-infected with HIV is challenging as TB remains the leading cause of death in such individuals. Accurate and rapid diagnosis of active TB will avert mortality in both adults and children, reduce transmission, and assist in timeous decisions for antiretroviral therapy initiation...
March 2017: Current Opinion in HIV and AIDS
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