Publications by authors named "Variava E"

Background: Liver disease is the leading cause of non-AIDS-related mortality in people living with HIV (PLWH). Steatotic liver disease (SLD) is increasingly recognised as an important aetiological factor in liver dysfunction in PLWH.

Objectives: This study aimed to determine the post-mortem prevalence and severity of SLD and determine HIV- and non-HIV-related risk factors associated with it.

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Purpose: In the setting of an established childhood pneumococcal vaccination programme with immediate initiation and treatment of antiretroviral therapy (ART) for people living with HIV (PLWH), the risk of adult pneumococcal community-acquired pneumonia (CAP) is not recently described. We aimed to investigate CAP incidence, recurrence, mortality, risk factors and microbiology before and during the COVID-19 pandemic.

Participants: Adults aged ≥18 years were enrolled in three South African provinces from March 2019 to October 2021, with a brief halt during the initial COVID-19 lockdown.

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Objective: The purpose of this study was to evaluate the efficacy of combination nicotine replacement therapy (c-NRT) for smoking cessation among people with HIV (PWH) in South Africa.

Design: We conducted an open label, individually randomized clinical trial.

Methods: Using a two-armed approach, PWH who smoke were randomized to receive either 1) intensive anti-smoking behavioral counseling (BC) or 2) intensive anti-smoking BC plus c-NRT (nicotine patches augmented by nicotine gum).

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Background: High systolic blood pressure remains a leading modifiable risk factor for cardiovascular diseases worldwide and in South Africa (SA). Information about the extent of guideline implementation and blood pressure (BP) control is lacking in Matlosana Sub-district, North West province, SA. The study aimed to assess the implementation of the South African Hypertension Practice Guideline (SAHPG) and BP control in adults attending primary care facilities in Matlosana.

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Article Synopsis
  • Identifying risk factors for RSV-associated severe acute respiratory illness (SARI) is crucial for improving vaccine strategies and interventions.
  • Surveillance data from South Africa (2012-2018) showed that RSV was more common in SARI cases (15%) than in influenza-like illness (ILI) cases (6%), highlighting the importance of targeted research.
  • Key risk factors for SARI included very young age (under 2 months), malnutrition, prematurity, living with HIV for children, and older age, prolonged symptoms, underlying illness, and living with HIV for adults, suggesting the need for focused prevention efforts in these vulnerable groups.
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Article Synopsis
  • The study evaluated the effectiveness of two COVID-19 vaccines (Pfizer BNT162b2 and Johnson & Johnson Ad26.COV2.S) in preventing hospitalizations in South African adults during different SARS-CoV-2 variants.
  • It included 925 cases (hospitalized) and 1890 controls (not hospitalized), analyzing their vaccination status and disease outcomes from June 2021 to March 2022.
  • Results showed that BNT162b2 had high effectiveness against hospitalizations during the Delta variant wave, particularly in older and HIV-uninfected adults, while the effectiveness of Ad26.COV2.S was inconclusive.
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Background: Tuberculosis (TB) preventive therapy (TPT) reduces the risk of TB disease in people with human immunodeficiency virus (HIV), yet uptake has been suboptimal in many countries. We assessed whether QuantiFERON Gold In-Tube (QGIT) during routine HIV care increased TB infection (TBI) testing and TPT prescriptions.

Methods: This parallel-arm, 1:1 cluster-randomized controlled trial compared the standard-of-care tuberculin skin test to QGIT in South Africa.

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Background: The current tuberculosis (TB) drug development pipeline is being re-populated with candidates, including nitroimidazoles such as pretomanid, that exhibit a potential to shorten TB therapy by exerting a bactericidal effect on non-replicating bacilli. Based on results from preclinical and early clinical studies, a four-drug combination of bedaquiline, pretomanid, moxifloxacin, and pyrazinamide (BPaMZ) regimen was identified with treatment-shortening potential for both drug-susceptible (DS) and drug-resistant (DR) TB. This trial aimed to determine the safety and efficacy of BPaMZ.

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Background: There is increasing interest in utilising two-drug regimens for HIV treatment with the goal of reducing toxicity and improve acceptability. The D3 trial evaluates the efficacy and safety of DTG/3TC in children and adolescents and includes a nested pharmacokinetics(PK) substudy for paediatric drug licensing.

Methods: D3 is an ongoing open-label, phase III, 96-week non-inferiority randomised controlled trial(RCT) conducted in South Africa, Spain, Thailand, Uganda and the United Kingdom.

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Clofazimine is included in drug regimens to treat rifampicin/drug-resistant tuberculosis (DR-TB), but there is little information about its interaction with other drugs in DR-TB regimens. We evaluated the pharmacokinetic interaction between clofazimine and isoniazid, linezolid, levofloxacin, and cycloserine, dosed as terizidone. Newly diagnosed adults with DR-TB at Klerksdorp/Tshepong Hospital, South Africa, were started on the then-standard treatment with clofazimine temporarily excluded for the initial 2 weeks.

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Article Synopsis
  • * A pilot trial was conducted with 111 participants, comparing those who received home visits to those who only had usual care, finding a 59% reduction in mortality, though not statistically significant.
  • * The research showed that home visits are feasible and potentially effective, but challenges related to COVID-19 impacted the number of participants enrolled in the study.
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Background: Elevated HIV-associated mortality persists, despite a notable decline with the expansion of antiretroviral therapy (ART). In South Africa, the relative majority of deaths occur in health facilities, providing an opportunity to track decedent characteristics.

Setting: We analyzed data from 14,870 adult patients who died between 2008 and 2018 at Klerksdorp/Tshepong Hospital Complex in South Africa.

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Background: Despite a high (48%) prevalence of snuff use among women with HIV in South Africa, little is known of the attitudes and behaviors of use, strategies for cessation, and potential health risks.

Methods: In a cross-sectional study, a questionnaire was administered to adults (≥18 years) with (HIV+) and without HIV (HIV-) who self-reported current snuff use to collect information on demographics, snuff use and cessation attempts, preferred strategies for cessation, other substance use, history of respiratory illness, and mental health.

Results: 150 (74 HIV+, 76 HIV-) participants were enrolled; 115 (77%) were daily snuff users, 6 (4%) were current smokers, and 17 (11%) former smokers.

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Objectives: The detection of respiratory syncytial virus (RSV) in upper airway samples does not necessarily infer causality of illness. We aimed to calculate the attributable fraction (AF) of RSV in clinical syndromes across age groups.

Methods: Using unconditional logistic regression models, we estimated the AF of RSV-associated influenza-like illness (ILI) and severe acute respiratory illness (SARI) cases by comparing RSV detection prevalence among ILI and SARI cases to those of healthy controls in South Africa, 2012-2016.

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Background: HIV and AIDS continues to impose substantial healthcare challenges in sub-Saharan Africa, but there are limited local data comparing inpatient outcomes between people with HIV (PLWH) and those uninfected.

Objectives: To compare cause-specific mortality among hospitalised adolescents and adults, stratified by HIV-serostatus.

Method: A cross-sectional analysis was performed, analysing cause-specific inpatient mortality data and total admissions, from 01 January 2017 to 30 June 2020, at Tshepong Hospital, North West province, South Africa.

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Background: Data on the economic burden of RSV-associated illness will inform decisions on the programmatic implementation of maternal vaccines and monoclonal antibodies. We estimated the cost of RSV-associated illness in fine age bands to allow more accurate cost-effectiveness models to account for a limited duration of protection conferred by short- or long-acting interventions.

Methods: We conducted a costing study at sentinel sites across South Africa to estimate out-of-pocket and indirect costs for RSV-associated mild and severe illness.

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Background: Missing or undiagnosed patients with tuberculosis (TB) or coronavirus disease 2019 (COVID-19) are of concern. Identifying both infections in patients with no diagnosis prior to death contributes to understanding the burden of disease. To confirm reports of global reduction in TB incidence, a 2012 autopsy study of adults dying at home of natural causes in a high-TB-burden setting was repeated, including severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) assessments after the first COVID-19 surge in South Africa.

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Background: Vaccines and monoclonal antibodies to protect the very young infant against the respiratory syncytial virus (RSV)-associated illness are effective for limited time periods. We aimed to estimate age-specific burden to guide implementation strategies and cost-effectiveness analyses.

Methods: We combined case-based surveillance and ecological data to generate a national estimate of the burden of RSV-associated acute respiratory illness (ARI) and severe acute respiratory illness (SARI) in South African children aged < 5 years (2011-2016), including adjustment for attributable fraction.

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Objectives: This study aimed to understand the cost implications of managing people living with type 1 diabetes mellitus in the South African public healthcare system.

Methods: A multicenter, noninterventional retrospective chart review study was performed. Data on healthcare resource consumption, demographics, risk factors, clinical history, and acute events were collected.

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The nicotine metabolite ratio (NMR) is associated with race/ethnicity but has not been evaluated among smokers in the African region. We conducted a cross-sectional analysis of baseline data from a large randomized, controlled trial for smoking cessation among people with HIV (PWH) in South Africa. Urine samples were analyzed for the NMR and evaluated as a binary variable using a cutoff value of the fourth quartile to determine the fastest metabolizers.

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Background: Type 1 diabetes mellitus (T1DM) is less common than type 2 diabetes mellitus but is increasing in frequency in South Africa. It tends to affect younger individuals, and upon diagnosis, exogenous insulin is essential for survival. In South Africa, the health care system is divided into private and public health care systems.

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Background: Data on risk factors for coronavirus disease 2019 (COVID-19)-associated hospitalization and mortality in high human immunodeficiency virus (HIV) prevalence settings are limited.

Methods: Using existing syndromic surveillance programs for influenza-like-illness and severe respiratory illness at sentinel sites in South Africa, we identified factors associated with COVID-19 hospitalization and mortality.

Results: From April 2020 through March 2022, severe acute respiratory syndrome coronavirus 2 was detected in 24.

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Background: Rapid switching from second-line to third-line antiretroviral therapy (TLART) is crucial for achieving viral suppression and reducing illness related to ART failure.

Objectives: This retrospective cohort study quantified the waiting periods for TLART initiation after virological failure on second-line therapy was detected, assessed factors associated with delays and assessed the outcomes of patients started on TLART.

Method: Data were abstracted from records of individuals eligible for TLART, and the time to TLART initiation was calculated.

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Host genetic factors are known to modify the susceptibility, severity, and outcomes of COVID-19 and vary across populations. However, continental Africans are yet to be adequately represented in such studies despite the importance of genetic factors in understanding Africa's response to the pandemic. We describe the development of a research resource for coronavirus host genomics studies in South Africa known as COVIGen-SA-a multicollaborator strategic partnership designed to provide harmonised demographic, clinical, and genetic information specific to Black South Africans with COVID-19.

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