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Hiv incidence assay

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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
#1
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
#2
Lesley Scott, Pedro da Silva, Catharina C Boehme, Wendy Stevens, Chris 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...
January 5, 2017: Current Opinion in HIV and AIDS
https://www.readbyqxmd.com/read/28019101/subtypes-and-risk-behaviors-among-incident-hiv-cases-in-the-bangkok-men-who-have-sex-with-men-cohort-study-thailand-2006-2015
#3
Caitlin R Lam, Timothy H Holtz, Wanna Leelawiwat, Philip Mock, Wannee Chonwattana, Wipas Wimonsate, Anchalee Varangrat, Warunee Thienkrua, Charles Rose, Anupong Chitwarakorn, Marcel E Curlin
INTRODUCTION: HIV-1 incidence and prevalence remain high among men who have sex with men (MSM), and transgender women (TGW), in Thailand. To examine the link between epidemiologic factors and HIV-1 subtype transmission among Thai MSM, we compared covariates of infection with HIV CRF01-AE and other HIV strains among participants in the Bangkok MSM Cohort Study (BMCS). MATERIALS AND METHODS: The BMCS was an observational cohort study of Thai MSM and TGW with up to 60 months of follow-up at 4-monthly intervals...
December 24, 2016: AIDS Research and Human Retroviruses
https://www.readbyqxmd.com/read/28004622/moving-towards-a-reliable-hiv-incidence-test-current-status-resources-available-future-directions-and-challenges-ahead
#4
G Murphy, C D Pilcher, S M Keating, R Kassanjee, S N Facente, A Welte, E Grebe, K Marson, M P Busch, P Dailey, N Parkin, J Osborn, S Ongarello, K Marsh, J M Garcia-Calleja
In 2011 the Incidence Assay Critical Path Working Group reviewed the current state of HIV incidence assays and helped to determine a critical path to the introduction of an HIV incidence assay. At that time the Consortium for Evaluation and Performance of HIV Incidence Assays (CEPHIA) was formed to spur progress and raise standards among assay developers, scientists and laboratories involved in HIV incidence measurement and to structure and conduct a direct independent comparative evaluation of the performance of 10 existing HIV incidence assays, to be considered singly and in combinations as recent infection test algorithms...
December 22, 2016: Epidemiology and Infection
https://www.readbyqxmd.com/read/27997597/immunogenicity-and-protective-efficacy-of-the-dar-901-booster-vaccine-in-a-murine-model-of-tuberculosis
#5
Timothy Lahey, Dominick Laddy, Krystal Hill, Jacqueline Schaeffer, Alison Hogg, James Keeble, Belinda Dagg, Mei Mei Ho, Robert D Arbeit, C Fordham von Reyn
BACKGROUND: The development of a novel tuberculosis vaccine is a leading global health priority. SRL172, an inactivated, whole-cell mycobacterial vaccine, was safe, immunogenic and reduced the incidence of culture-confirmed tuberculosis in a phase III trial in HIV-infected and BCG immunized adults in Tanzania. Here we describe the immunogenicity and protective efficacy of DAR-901, a booster vaccine against tuberculosis manufactured from the same seed strain using a new scalable method...
2016: PloS One
https://www.readbyqxmd.com/read/27974398/safety-and-immunogenicity-of-the-recombinant-bcg-vaccine-vpm1002-in-hiv-unexposed-newborn-infants-in-south-africa
#6
André G Loxton, Julia K Knaul, Leander Grode, Andrea Gutschmidt, Christiane Meller, Bernd Eisele, Hilary Johnstone, Gian van der Spuy, Jeroen Maertzdorf, Stefan H E Kaufmann, Anneke C Hesseling, Gerhard Walzl, Mark F Cotton
BACKGROUND: Tuberculosis is a global threat to which infants are especially vulnerable. Effective vaccines are required to protect infants from this devastating disease. VPM1002, a novel recombinant Bacille Calmette-Guérin (BCG) vaccine, previously shown to be safe and immunogenic in adults, was evaluated for safety in its intended target population, namely newborn infants in a region with high prevalence of tuberculosis. METHODS: A total of forty-eight newborns were vaccinated intradermally with VPM1002 (n=36) or BCG Danish strain (n=12) in a Phase II open-labelled, randomized trial with a 6 month follow-up period...
December 14, 2016: Clinical and Vaccine Immunology: CVI
https://www.readbyqxmd.com/read/27942608/formulation-development-and-optimization-of-lamivudine-300-mg-and-tenofovir-disoproxil-fumarate-tdf-300-mg-fdc-tablets-by-d-optimal-mixture-design
#7
Prosper Tibalinda, Joseph Sempombe, Raphael Shedafa, Nelson Masota, Dickson Pius, Mary Temu, Eliangiringa Kaale
The usage of fixed dose combination (FDC) tablets of Lamivudine and Tenofovir Disoproxil Fumarate (TDF) is increasing due to increased incidences of HIV/Hepatitis B and HIV/TB co-infections. This is likely to increase the financial crisis due to limited resources for funding procurement of ready-made products from the pharmaceuticals manufacturing leading countries. Therefore, production of local oral tablets containing Lamivudine and TDF FDC is inevitable. Lamivudine 300 mg/TDF 300 mg tablets were developed and optimized by D-optimal mixture design and produced by direct compression technique...
December 2016: Heliyon
https://www.readbyqxmd.com/read/27872321/msm-in-bogot%C3%A3-are-living-with-hiv-for-extended-periods-without-diagnosis-or-treatment
#8
Maria Cecilia Zea, Patricia Olaya, Carol A Reisen, Paul J Poppen
We examined recency of infection in serum samples obtained from 69 newly identified HIV-positive cases in a sample of 1000 men who have sex with men (MSM) in Bogotá. HIV antibody avidity assays were performed using the Architect HIV Ag/AB combo. Avidity indices ranged from 0.62 to 1.22, with a cut-off score below 0.80 indicative of recent infection. Two samples were classified as recent, six fell within the gray zone (0.75 to 0.85), and the remaining 61 were considered established infections. Results provided evidence of widespread, long-term, undiagnosed HIV infection, as well as an estimate of one-year incidence at ...
November 21, 2016: International Journal of STD & AIDS
https://www.readbyqxmd.com/read/27828875/antiretroviral-drug-use-in-a-cross-sectional-population-survey-in-africa-nimh-project-accept-hptn-043
#9
Jessica M Fogel, William Clarke, Michal Kulich, Estelle Piwowar-Manning, Autumn Breaud, Matthew T Olson, Mark A Marzinke, Oliver Laeyendecker, Agnès Fiamma, Deborah Donnell, Jessie K K Mbwambo, Linda Richter, Glenda Gray, Michael Sweat, Thomas J Coates, Susan H Eshleman
BACKGROUND: Antiretroviral (ARV) drug treatment benefits the treated individual and can prevent HIV transmission. We assessed ARV drug use in a community-randomized trial that evaluated the impact of behavioral interventions on HIV incidence. METHODS: Samples were collected in a cross-sectional survey after a 3-year intervention period. ARV drug testing was performed using samples from HIV-infected adults at 4 study sites (Zimbabwe; Tanzania; KwaZulu-Natal and Soweto, South Africa; survey period 2009-2011) using an assay that detects 20 ARV drugs (6 nucleoside/nucleotide reverse transcriptase inhibitors, 3 nonnucleoside reverse transcriptase inhibitors, and 9 protease inhibitors; maraviroc; raltegravir)...
February 1, 2017: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/27824677/do-biomarkers-of-inflammation-monocyte-activation-and-altered-coagulation-explain-excess-mortality-between-hiv-infected-and-uninfected-people
#10
Kaku A So-Armah, Janet P Tate, Chung-Chou H Chang, Adeel A Butt, Mariana Gerschenson, Cynthia L Gibert, David Leaf, David Rimland, Maria C Rodriguez-Barradas, Matthew J Budoff, Jeffrey H Samet, Lewis H Kuller, Steven G Deeks, Kristina Crothers, Russell P Tracy, Heidi M Crane, Mohammad M Sajadi, Hilary A Tindle, Amy C Justice, Matthew S Freiberg
BACKGROUND: HIV infection and biomarkers of inflammation [measured by interleukin-6 (IL-6)], monocyte activation [soluble CD14 (sCD14)], and coagulation (D-dimer) are associated with morbidity and mortality. We hypothesized that these immunologic processes mediate (explain) some of the excess risk of mortality among HIV infected (HIV+) versus uninfected people independently of comorbid diseases. METHODS: Among 2350 (1521 HIV+) participants from the Veterans Aging Cohort Study Biomarker Cohort (VACS BC), we investigated whether the association between HIV and mortality was altered by adjustment for IL-6, sCD14, and D-dimer, accounting for confounders...
June 1, 2016: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/27824254/estimating-hiv-incidence-using-a-cross-sectional-survey-comparison-of-three-approaches-in-a-hyperendemic-setting-ndhiwa-subcounty-kenya-2012
#11
Stéphanie Blaizot, Andrea A Kim, Clement Zeh, Benjamin Riche, David Maman, Kevin M De Cock, Jean-François Etard, René Ecochard
OBJECTIVES: Estimating HIV incidence is critical for identifying groups at risk for HIV infection, planning and targeting interventions, and evaluating these interventions over time. The use of reliable estimation methods for HIV incidence is thus of high importance. The aim of this study was to compare methods for estimating HIV incidence in a population-based cross-sectional survey. DESIGN/METHODS: The incidence estimation methods evaluated included assay-derived methods, a testing history-derived method, and a probability-based method applied to data from the Ndhiwa HIV Impact in Population Survey (NHIPS)...
December 13, 2016: AIDS Research and Human Retroviruses
https://www.readbyqxmd.com/read/27801374/incidence-and-risk-factors-for-herpes-simplex-virus-type-2-seroconversion-among-pregnant-women-in-uganda-a-prospective-study
#12
Sarah Nakubulwa, Dan K Kaye, Freddie Bwanga, Nazarius Mbona Tumwesigye, Edith Nakku-Joloba, Florence M Mirembe
INTRODUCTION: Herpes simplex virus type 2 (HSV-2) acquired during pregnancy is associated with adverse outcomes such as perinatal HSV-2 transmission. HSV-2 seroconversion occurs within four weeks of HSV-2 acquisition. There was neither documented incidence nor risk factors for HSV-2 seroconversion during pregnancy in Uganda. The objective of this study was to determine the incidence and risk factors for HSV-2 seroconversion among pregnant women in Mulago Hospital, Uganda. METHODOLOGY: A prospective study of 200 consenting HSV-2-negative women between 26 and 28 weeks of gestation was done between November 2013 and October 2014...
October 31, 2016: Journal of Infection in Developing Countries
https://www.readbyqxmd.com/read/27780490/evaluation-of-the-limiting-antigen-avidity-eia-lag-in-people-who-inject-drugs-in-greece
#13
G K Nikolopoulos, A Katsoulidou, M Kantzanou, C Rokka, C Tsiara, V Sypsa, D Paraskevis, M Psichogiou, S Friedman, A Hatzakis
This analysis assessed the utility of the limiting antigen avidity assay (LAg). Samples of people who inject drugs (PWID) in Greece with documented duration of HIV-1 infection were tested by LAg. A LAg-normalized optical density (ODn) ⩽1·5 corresponds to a recency window period of 130 days. The proportion true recent (PTR) and proportion false recent (PFR) were estimated in 28 seroconverters and in 366 samples collected >6 months after HIV diagnosis, respectively. The association between LAg ODn and HIV RNA level was evaluated in 232 persons...
January 2017: Epidemiology and Infection
https://www.readbyqxmd.com/read/27749931/gastrointestinal-symptoms-in-hiv-infected-patients-female-sex-and-smoking-as-risk-factors-in-an-outpatient-cohort-in-brazil
#14
Annelisa Silva E Alves de Carvalho Santos, Erika Aparecida Silveira, Marianne de Oliveira Falco
This study aimed to estimate the incidence of gastrointestinal symptoms (GIS) and associated factors in an outpatient cohort of people living with HIV/AIDS (PLWHA) followed between October 2009 and July 2011. We evaluated nausea and/or vomiting, dyspepsia, heartburn, diarrhea, constipation, and flatulence. The outcome variable was the presence of three or more GIS. Sociodemographic (sex, skin color, age, income, years of schooling), lifestyle (smoking status, alcohol consumption, physical activity level), clinical (antiretroviral therapy, time of HIV infection, CD4 lymphocyte count, viral load), and anthropometric (nutritional status and waist circumference) variables were investigated...
2016: PloS One
https://www.readbyqxmd.com/read/27642343/epidemiological-distribution-and-genotype-characterization-of-the-hepatitis-c-virus-among-hiv-patients-in-kashan-iran
#15
Hasan Afzali, Mansooreh Momen-Heravi, Asefeh Farokhzad
BACKGROUND: Parenteral transmission is a common route of transmission for both human immunodeficiency virus (HIV) and hepatitis C virus (HCV); therefore, hepatitis C viral infection is highly prevalent among people infected with HIV. OBJECTIVES: This study was designed to examine the epidemiology and describe the clinical manifestation as well as the HCV genotypes in patients from the city of Kashan, Iran, who are coinfected with HIV and HCV. PATIENTS AND METHODS: This descriptive study was conducted in 2014 in the city of Kashan...
July 2016: Hepatitis Monthly
https://www.readbyqxmd.com/read/27622435/cerebral-microcalcifications-in-a-newborn-with-congenital-tuberculosis
#16
Yolanda Cifuentes, Martha Isabel Murcia, Jorge Piar, Patricia Pardo
Tuberculosis is a serious public health problem worldwide. In 2012, the World Health Organization estimated 8.6 million new cases and 1.3 million deaths due to the disease. In 2011, the incidence in Colombia was 24 cases per 100,000 inhabitants. There is little information about tuberculosis in pregnant women, and congenital infection is considered a rare disease that is difficult to diagnose, leads to high mortality, and may be confused with tuberculosis acquired after birth. In addition, it has been associated with HIV infection in mothers and infants...
March 3, 2016: Biomédica: Revista del Instituto Nacional de Salud
https://www.readbyqxmd.com/read/27575746/extensive-genetic-diversity-of-hiv-1-in-incident-and-prevalent-infections-among-malaysian-blood-donors-multiple-introductions-of-hiv-1-genotypes-from-highly-prevalent-countries
#17
Wei Zhen Chow, Abdul Hamid Bon, Sheila Keating, Fread Anderios, Hazwan Abdul Halim, Yutaka Takebe, Adeeba Kamarulzaman, Michael P Busch, Kok Keng Tee
Transfusion-transmissible infections including HIV-1 continue to pose major risks for unsafe blood transfusions due to both window phase infections and divergent viruses that may not be detected by donor screening assays. Given the recent emergence of several HIV-1 circulating recombinant forms (CRFs) in high-risk populations in the Southeast Asia region, we investigated the genetic diversity of HIV-1 among the blood donors in Kuala Lumpur, Malaysia. A total of 211 HIV-positive plasma samples detected among 730,188 donations to the National Blood Centre between 2013 and 2014 were provided (90...
2016: PloS One
https://www.readbyqxmd.com/read/27552218/analysis-of-viral-diversity-in-relation-to-the-recency-of-hiv-1c-infection-in-botswana
#18
Sikhulile Moyo, Alain Vandormael, Eduan Wilkinson, Susan Engelbrecht, Simani Gaseitsiwe, Kenanao P Kotokwe, Rosemary Musonda, Frank Tanser, Max Essex, Vladimir Novitsky, Tulio de Oliveira
BACKGROUND: Cross-sectional, biomarker methods to determine HIV infection recency present a promising and cost-effective alternative to the repeated testing of uninfected individuals. We evaluate a viral-based assay that uses a measure of pairwise distances (PwD) to identify HIV infection recency, and compare its performance with two serologic incidence assays, BED and LAg. In addition, we assess whether combination BED plus PwD or LAg plus PwD screening can improve predictive accuracy by reducing the likelihood of a false-recent result...
2016: PloS One
https://www.readbyqxmd.com/read/27525403/-a-pediatric-case-of-hiv-who-diagnosed-by-virtue-of-disseminated-cryptococcus-infection
#19
Manolya Acar, Murat Sütçü, Hacer Aktürk, Selda Hançerli Törün, Nurinisa Karagöz, Hayati Beka, Ensar Yekeler, Ali Ağaçfidan, Nuran Salman, Ayper Somer
Cryptococcus neoformans is an important opportunistic pathogen that causes serious mortality and morbidity in AIDS patients. Although its incidence has decreased with proper antiretroviral treatment (ART), it is still a major concern in areas with low socioeconomic HIV endemic countries with poor sources of therapy. In our country, pediatric HIV infection and so, HIV-related opportunistic infections are very rare. In order to pay attention to this unusual collaboration; herein, we presented a pediatric case who was diagnosed with HIV and disseminated cryptococcus infection concomitantly...
July 2016: Mikrobiyoloji Bülteni
https://www.readbyqxmd.com/read/27513563/development-of-a-new-limiting-antigen-avidity-dot-immuno-gold-filtration-assay-for-hiv-1-incidence
#20
Zhiyun Gao, Hao Yan, Xia Feng, Lijin Wu, Maofeng Qiu, Wenge Xing, Guiyun Zhang, Zhi Zhang, Yan Jiang
Several laboratory assays on cross-sectional specimens for detecting recent HIV infections were developed, but these assays could not be applied in resource-limited and high HIV-incidence areas. This study describes the development of a rapid assay that can simultaneously detect the presence of HIV-1 antibodies of current and/or recent infection. The dot immuno-gold filtration assay (DIGFA) was used to detect recent infection on the principle of antibody avidity changes between recent and long-term infections...
2016: PloS One
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