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Hiv incidence assay

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https://www.readbyqxmd.com/read/29746535/gonorrhea-chlamydia-and-hiv-incidence-among-female-sex-workers-in-cotonou-benin-a-longitudinal-study
#1
Souleymane Diabaté, Annie Chamberland, Nassirou Geraldo, Cécile Tremblay, Michel Alary
Female sex workers (FSWs) continue to carry a heavy burden of sexually transmitted infections (STI). For prevention purposes, there is a need to identify most-at-risk subgroups among them. The objective of this longitudinal cohort study conducted at Dispensaire IST, Cotonou, Benin, was to assess Neisseria gonorrhoeae (NG) / Chlamydia trachomatis (CT) incidence and determinants; and HIV incidence among FSWs in presence of STI/HIV risk reduction activities. Overall, 319 adult FSWs were followed quarterly from September 2008 to March 2012...
2018: PloS One
https://www.readbyqxmd.com/read/29739378/higher-serum-25-hydroxyvitamin-d-concentrations-are-associated-with-active-pulmonary-tuberculosis-in-hospitalised-hiv-infected-patients-in-a-low-income-tropical-setting-a-cross-sectional-study
#2
Cuthbert Musarurwa, Lynn Sodai Zijenah, Doreen Zvipo Mhandire, Tsitsi Bandason, Kudakwashe Mhandire, Maria Mary Chipiti, Marshall Wesley Munjoma, Witmore Bayayi Mujaji
BACKGROUND: The inherent risk of developing tuberculosis (TB) in HIV- infected individuals is further enhanced by hypovitaminosis D. Interventions that offset HIV-associated immune deterioration potentially arrest disease progression and incidence of opportunistic infections including TB. Despite conflicting reports on association between vitamin D deficiency (VDD) and risk of TB, vitamin D (VD) supplementation remains a promising intervention. METHODS: We conducted a comparative cross-sectional study on 145 HIV+ /pulmonary TB+ (PTB) and 139 HIV+ /PTB- hospitalised patients to investigate association of vitamin D status and risk of PTB...
May 8, 2018: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/29628513/hot-news-impact-of-low-level-viremia-on-treatment-outcomes-during-art-is-it-time-to-revise-the-definition-of-virological-failure
#3
Eva Poveda, Manuel Crespo
The level of HIV-RNA in plasma (HIV viral load) is the main marker used to monitor the virological response to antiretroviral therapy (ART) in HIV-infected patients. The threshold used to define virological suppression has historically been dictated by the limits of detection of the commercial assays used to quantify the plasma viral load. Thus, as more sensitive assays have proliferated and become more widely available, the definition has shifted from < 400 cop/mL with the first generation assays, to < 50 cop/mL, to < 20 cop/mL currently...
January 2018: AIDS Reviews
https://www.readbyqxmd.com/read/29596107/tmc120-displayed-potent-cytotoxic-effect-on-human-cervical-carcinoma-through-enhancing-the-polymerization-of-microtubules
#4
Lili Shi, Le Yu, Desheng Zhong, Chunping Gu, Longyun Lv, Xiaoyun Zeng, Xingang Yao, Lin Li, Shuwen Liu
OBJECTIVE: In the post-HAART era, the incidence of some AIDS-defining cancers declined markedly likely reflecting HAART-related improvements in immunity, whereas incidence of some cancers such as cervical cancer has not been affected. Therefore, it is valuable to find whether antiretroviral drugs or prophylactic microbicides could treat or prevent these cancers, especially the cervical cancer. DESIGN: We screened the anti-HIV drugs, approved or in phase III clinical trials, to identify a potential anticancer drug candidate...
March 28, 2018: AIDS
https://www.readbyqxmd.com/read/29593675/cryptococcal-antigen-screening-in-asymptomatic-hiv-infected-antiretroviral-na%C3%A3-ve-patients-in-cameroon-and-evaluation-of-the-new-semi-quantitative-biosynex-cryptops-test
#5
Elvis Temfack, Charles Kouanfack, Leonella Mossiang, Angela Loyse, Marie C Fonkoua, Síle F Molloy, Sinata Koulla-Shiro, Eric Delaporte, Françoise Dromer, Thomas Harrison, Olivier Lortholary
Background: Cryptococcal meningitis (CM) is a major cause of AIDS-related mortality in Africa. Detection of serum cryptococcal antigen (CrAg) predicts development of CM in antiretroviral (ART) naïve HIV-infected patients with severe immune depression. Systematic pre-ART CrAg screening and pre-emptive oral fluconazole is thus recommended. We postulated that a semi-quantitative CrAg screening approach could offer clinically relevant advantages. Methods: ART-naïve asymptomatic adult outpatients with <100 CD4 cells/mm3 presenting to the Yaoundé Central Hospital, Cameroon were screened for CrAg using the IMMY lateral flow assay (LFA)...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29590335/first-line-raltegravir-emtricitabine-tenofovir-combination-in-hiv-2-infection-phase-2-non-comparative-trial-anrs-159-hiv-2
#6
Sophie Matheron, Diane Descamps, Sebastien Gallien, Amel Besseghir, Pierre Sellier, Laurent Blum, Emmanuel Mortier, Charlotte Charpentier, Roland Tubiana, Florence Damond, Gilles Peytavin, Diane Ponscarme, Fideline Collin, Francoise Brun-Vezinet, Genevieve Chene
Background: New options for first-line treatment of HIV-2 infection are needed. We evaluated an integrase inhibitor (raltegravir)-containing regimen. Methods: ART-naïve adults infected with HIV-2 only and history of CDC group B or C event, or a CD4 count <500 cells/μL, or a CD4 decrease >50 cells/μL/year over the past 3 years, or a confirmed plasma HIV-2 RNA (pVL) ≥100 copies (cp)/mL were eligible for this non-comparative trial. The composite primary endpoint was survival at 48 weeks (W48) without any of the following: CD4 gain from baseline <100 cells/μL, confirmed pVL ≥40 cp/mL from W24, raltegravir permanent discontinuation, incident B or C event...
March 24, 2018: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29582718/use-of-a-single-xpert-mtb-rif-assay-to-determine-the-duration-of-airborne-isolation-in-hospitalized-patients-with-suspected-pulmonary-tuberculosis
#7
Husain Poonawala, Surbhi Leekha, Sandra Medina-Moreno, Mala Filippell, J Kristie Johnson, Robert R Redfield, Kapil K Saharia
BACKGROUNDHospitalized patients with suspected tuberculosis (TB) are placed in airborne isolation until 3 sputum smear samples are negative for acid-fast bacilli (AFB). The Xpert MTB/RIF assay ("Xpert") nucleic acid amplification test (NAAT) to identify Mycobacterium tuberculosis DNA and resistance to rifampicin is superior to AFB sputum smear microscopy for the diagnosis of TB.OBJECTIVETo compare the performance of a single Xpert to AFB smear microscopy for time to airborne infection isolation (AII) discontinuation...
May 2018: Infection Control and Hospital Epidemiology
https://www.readbyqxmd.com/read/29580818/tuberculosis-advances-and-challenges-in-development-of-new-diagnostics-and-biomarkers
#8
REVIEW
Gerhard Walzl, Ruth McNerney, Nelita du Plessis, Matthew Bates, Timothy D McHugh, Novel N Chegou, Alimuddin Zumla
Tuberculosis remains the leading cause of death from an infectious disease worldwide. Early and accurate diagnosis and detection of drug-sensitive and drug-resistant tuberculosis is essential for achieving global tuberculosis control. Despite the introduction of the Xpert MTB/RIF assay as the first-line rapid tuberculosis diagnostic test, the gap between global estimates of incidence and new case notifications is 4·1 million people. More accurate, rapid, and cost-effective screening tests are needed to improve case detection...
March 23, 2018: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/29561424/nonopportunistic-infection-leading-to-rapidly-progressive-dementia-in-a-patient-with-hiv-aids-a-case-report
#9
Johannes Eimer, Jan Vesterbacka, Irina Savitcheva, Rayomand Press, Homayoun Roshanisefat, Piotr Nowak
RATIONALE: Cognitive dysfunction is a common presenting symptom in patients with HIV/AIDS. It is usually directly associated with HIV infection or due to opportunistic infection. Rapidly progressive dementia, however, is rarely observed in acute HIV infection or during immune reconstitution. Recently, a case of Creutzfeld-Jakob disease (CJD) has been reported in a patient with chronic HIV infection. The incidence of CJD is not known to be increased among immunocompromised patients. PATIENT CONCERNS: We here report the case of a 59-year-old male patient with a recent diagnosis of HIV/AIDS and Pneumocystis jiroveci pneumonia presenting with secondary behavioral changes and disorientation...
March 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29549702/lymphocyte-subsets-and-natural-killer-cell-cytotoxicity-in-intravenous-drug-users-with-hiv-1-infection-among-thai-population
#10
Wannee Kantakamalakul, Suwalee Jangkhum, Silawun Ampol, Porurtai Burupharat, Rutt Chuachoowong, Ruengpung Sutthent, Kovit Pattanapanyasat
BACKGOUND: Intravenous drug users (IVDUs) are among the high-risk groups who are most vulnerable to HIV infection. Several illicit drugs alter host immune function with increased incidence of infections including that of HIV. Many studies of the immune response of NK cells in HIV-1 seronegative IVDUs and HIV-1 seropositive IVDUs have been published from the Western countries and yet no data is available from Thailand. OBJECTIVE: To determine natural killer cell cytotoxicity and lymphocyte subsets in Thai HIV-1 infected intravenous drug users...
March 12, 2018: Asian Pacific Journal of Allergy and Immunology
https://www.readbyqxmd.com/read/29538464/congenital-cytomegalovirus-parvovirus-and-enterovirus-infection-in-mozambican-newborns-at-birth-a-cross-sectional-survey
#11
Lola Madrid, Rosauro Varo, Sonia Maculuve, Tacilta Nhampossa, Carmen Muñoz-Almagro, Enrique J Calderón, Cristina Esteva, Carla Carrilho, Mamudo Ismail, Begoña Vieites, Vicente Friaza, María Del Carmen Lozano-Dominguez, Clara Menéndez, Quique Bassat
BACKGROUND: Congenital cytomegalovirus (cCMV) infection is the most prevalent congenital infection acquired worldwide, with higher incidence in developing countries and among HIV-exposed children. Less is known regarding vertical transmission of parvovirus B19 (B19V) and enterovirus (EV). We aimed to assess the prevalence of CMV, B19V and EV vertical transmission and compare results of screening of congenital CMV obtained from two different specimens in a semirural Mozambican maternity...
2018: PloS One
https://www.readbyqxmd.com/read/29489059/identification-and-validation-of-a-multi-assay-algorithm-for-cross-sectional-hiv-incidence-estimation-in-populations-with-subtype-c-infection
#12
Oliver Laeyendecker, Jacob Konikoff, Douglas E Morrison, Ronald Brookmeyer, Jing Wang, Connie Celum, Charles S Morrison, Quarraisha Abdool Karim, Audrey E Pettifor, Susan H Eshleman
INTRODUCTION: Cross-sectional methods can be used to estimate HIV incidence for surveillance and prevention studies. We evaluated assays and multi-assay algorithms (MAAs) for incidence estimation in subtype C settings. METHODS: We analysed samples from individuals with subtype C infection with known duration of infection (2442 samples from 278 adults; 0.1 to 9.9 years after seroconversion). MAAs included 1-4 of the following assays: Limiting Antigen Avidity assay (LAg-Avidity), BioRad-Avidity assay, CD4 cell count and viral load (VL)...
February 2018: Journal of the International AIDS Society
https://www.readbyqxmd.com/read/29438560/hiite-hiv-1-incidence-and-infection-time-estimator
#13
Sung Yong Park, Tanzy M T Love, Shivankur Kapoor, Ha Youn Lee, John Hancock
Motivation: Around 2.1 million new HIV-1 infections were reported in 2015, alerting that the HIV-1 epidemic remains a significant global health challenge. Precise incidence assessment strengthens epidemic monitoring efforts and guides strategy optimization for prevention programs. Estimating the onset time of HIV-1 infection can facilitate optimal clinical management and identify key populations largely responsible for epidemic spread and thereby infer HIV-1 transmission chains. Our goal is to develop a genomic assay estimating the incidence and infection time in a single cross-sectional survey setting...
February 9, 2018: Bioinformatics
https://www.readbyqxmd.com/read/29378902/asymptomatic-lymphogranuloma-venereum-among-nigerian-men-who-have-sex-with-men
#14
Trevor A Crowell, Justin Hardick, Kara Lombardi, Zahra Parker, Afoke Kokogho, Senate Amusu, Sunday Odeyemi, Andrew Ivo, Stefan D Baral, Rebecca G Nowak, Sylvia Adebajo, Manhattan E Charurat, Julie Ake, Charlotte A Gaydos
OBJECTIVES: Recent outbreaks of anorectal lymphogranuloma venereum (LGV) among men who have sex with men (MSM) have been characterised by proctocolitis requiring extended antibiotic treatment compared with infections caused by other serovars of Chlamydia trachomatis (CT). We describe the prevalence and clinical features of LGV among Nigerian MSM diagnosed with anorectal CT. METHODS: MSM were recruited for this observational cohort in Lagos, Nigeria, using respondent-driven sampling and screened for HIV and bacterial STIs every three months for up to 18 months...
January 29, 2018: Sexually Transmitted Infections
https://www.readbyqxmd.com/read/29371581/hiv-associated-cryptococcal-disease-in-resource-limited-settings-a-case-for-prevention-is-better-than-cure
#15
REVIEW
Rita O Oladele, Felix Bongomin, Sara Gago, David W Denning
Cryptococcal disease remains a significant source of global morbidity and mortality for people living with HIV, especially in resource-limited settings. The recently updated estimate of cryptococcal disease revealed a global incidence of 223,100 cases annually with 73% of these cases being diagnosed in sub-Saharan Africa. Furthermore, 75% of the estimated 181,100 deaths associated with cryptococcal disease occur in sub-Saharan Africa. Point-of-care diagnostic assays have revolutionised the diagnosis of this deadly opportunistic infection...
December 2, 2017: Journal of Fungi (Basel, Switzerland)
https://www.readbyqxmd.com/read/29370775/case-report-mechanisms-of-hiv-elite-control-in-two-african-women
#16
Yumna Moosa, Ramla F Tanko, Veron Ramsuran, Ravesh Singh, Mashudu Madzivhandila, Nonhlanhla Yende-Zuma, Melissa-Rose Abrahams, Philippe Selhorst, Kamini Gounder, Penny L Moore, Carolyn Williamson, Salim S Abdool Karim, Nigel J Garrett, Wendy A Burgers
BACKGROUND: The majority of people living with HIV require antiretroviral therapy (ART) for controlling viral replication, however there are rare HIV controllers who spontaneously and durably control HIV in the absence of treatment. Understanding what mediates viral control in these individuals has provided us with insights into the immune mechanisms that may be important to induce for a vaccine or functional cure for HIV. To date, few African elite controllers from high incidence settings have been described...
January 25, 2018: BMC Infectious Diseases
https://www.readbyqxmd.com/read/29248529/high-avidity-anti-integrase-antibodies-discriminate-recent-and-non-recent-hiv-infection-implications-for-hiv-incidence-assay
#17
Zahra Rikhtegaran Tehrani, Kayhan Azadmanesh, Ehsan Mostafavi, Safoora Gharibzadeh, Shahrzad Soori, Mohammad Azizi, Alireza Khabiri
Estimation of HIV incidence provides real-time information of HIV transmission trends for decision makers. Anti-integrase antibodies are the last ones produced during seroconversion and presence of high-avidity anti-integrase antibodies indicates the chronicity of HIV infection. This study aimed to evaluate the performance of these antibodies in discriminating of recent from non-recent HIV infection. For this purpose, different ELISA formats were developed to detect high-avidity anti-integrase antibodies in a commercially available performance panel, and the best assay was selected for further evaluation...
March 2018: Journal of Virological Methods
https://www.readbyqxmd.com/read/29223963/field-evaluation-of-two-point-of-care-tests-for-syphilis-among-men-who-have-sex-with-men-verona-italy
#18
Antonella Zorzi, Maddalena Cordioli, Lorenzo Gios, Paola Del Bravo, Igor Toskin, Rosanna W Peeling, Karel Blondeel, Giuseppe Cornaglia, James Kiarie, Ronald Ballard, Massimo Mirandola
OBJECTIVES: The incidence of HIV and syphilis among men who have sex with men (MSM) in Europe has recently increased. Rapid point-of-care tests (POCTs) for syphilis can improve access to screening. The purpose of this study was to evaluate the performance of two syphilis POCTs compared with laboratory tests among MSM. METHODS: The study was undertaken in Verona, Italy. Asymptomatic MSM, potentially exposed to syphilis, were enrolled prospectively. The POCTs evaluated were SD Bioline Syphilis 3...
December 2017: Sexually Transmitted Infections
https://www.readbyqxmd.com/read/29187159/decision-tree-for-accurate-infection-timing-in-individuals-newly-diagnosed-with-hiv-1-infection
#19
Chris Verhofstede, Katrien Fransen, Annelies Van Den Heuvel, Kristel Van Laethem, Jean Ruelle, Ellen Vancutsem, Karolien Stoffels, Sigi Van den Wijngaert, Marie-Luce Delforge, Dolores Vaira, Laura Hebberecht, Marlies Schauvliege, Virginie Mortier, Kenny Dauwe, Steven Callens
BACKGROUND: There is today no gold standard method to accurately define the time passed since infection at HIV diagnosis. Infection timing and incidence measurement is however essential to better monitor the dynamics of local epidemics and the effect of prevention initiatives. METHODS: Three methods for infection timing were evaluated using 237 serial samples from documented seroconversions and 566 cross sectional samples from newly diagnosed patients: identification of antibodies against the HIV p31 protein in INNO-LIA, SediaTM BED CEIA and SediaTM LAg-Avidity EIA...
November 29, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/29165892/assays-for-estimating-hiv-incidence-updated-global-market-assessment-and-estimated-economic-value
#20
Charles S Morrison, Rick Homan, Natasha Mack, Pairin Seepolmuang, Megan Averill, Jamilah Taylor, Jennifer Osborn, Peter Dailey, Neil Parkin, Stefano Ongarello, Timothy D Mastro
INTRODUCTION: Accurate incidence estimates are needed to characterize the HIV epidemic and guide prevention efforts. HIV Incidence assays are cost-effective laboratory assays that provide incidence estimates from cross-sectional surveys. We conducted a global market assessment of HIV incidence assays under three market scenarios and estimated the economic value of improved incidence assays. METHODS: We interviewed 27 stakeholders, and reviewed journal articles, working group proceedings, and manufacturers' sales figures...
November 2017: Journal of the International AIDS Society
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