Gilles Wandeler

Dr. Gilles Wandeler


Research Focus & Metrics

Academic Career Length

14Years (2013-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 February 2017 in Journal of Hepatology
Verified
Journal Article
Closed access
CBCharles Béguelin
Charles Béguelin
DMDarius Moradpour
Darius Moradpour
RSRoland Sahli
Roland Sahli
FSFranziska Suter-Riniker
Franziska Suter-Riniker
ALAlexander Lüthi
Alexander Lüthi
GWGilles Wandeler
Gilles Wandeler

1 January 2015 in Journal of the International AIDS Society
Verified
Journal Article
Open access
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AHAnna Hachfeld
Anna Hachfeld
BLBruno Ledergerber
Bruno Ledergerber
KDKatharine Darling
Katharine Darling
RWRainer Weber
Rainer Weber
ACAlexandra Calmy
Alexandra Calmy
SSSwiss HIV Cohort Study
Swiss HIV Cohort Study
Introduction: Late presentation to HIV care leads to increased morbidity and mortality. We explored risk factors and reasons for late HIV testing and presentation to care in the nationally representative Swiss HIV Cohort Study (SHCS).Methods: Adult patients enrolled in the SHCS between July 2009 and June 2012 were included. An initial CD4 count <350 cells/µl or an AIDS‐defining illness defined late presentation. Demographic and behavioural characteristics of late presenters (LPs) were compared with those of non‐late presenters (NLPs). Information on self‐reported, individual barriers to HIV testing and care were obtained during face‐to‐face interviews.Results: Of 1366 patients included, 680 (49.8%) were LPs. Seventy‐two percent of eligible patients took part in the survey. LPs were more likely to be female (p<0.001) or from sub‐Saharan Africa (p<0.001) and less likely to be highly educated (p=0.002) or men who have sex with men (p<0.001). LPs were more likely to have their first HIV test following a doctor's suggestion (p=0.01), and NLPs in the context of a regular check‐up (p=0.02) or after a specific risk situation (p<0.001). The main reasons for late HIV testing were “did not feel at risk” (72%), “did not feel ill” (65%) and “did not know the symptoms of HIV” (51%). Seventy‐one percent of the participants were symptomatic during the year preceding HIV diagnosis and the majority consulted a physician for these symptoms.Conclusions: In Switzerland, late presentation to care is driven by late HIV testing due to low risk perception and lack of awareness about HIV. Tailored HIV testing strategies and enhanced provider‐initiated testing are urgently needed.

14 December 2018 in Journal of the International AIDS Society
Verified
Journal Article
Open access
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MNMarcellin N Nouaman
Marcellin N Nouaman
MVMichael Vinikoor
Michael Vinikoor
MSMoussa Seydi
Moussa Seydi
DÉDidier K. Ékouévi
Didier K. Ékouévi
PCPatrick A Coffie
Patrick A Coffie
IAIe D E A
Ie D E A
Introduction: Excessive alcohol consumption leads to unfavourable outcomes in people living with HIV (PLHIV), including reduced adherence to antiretroviral therapy (ART) and engagement into care. However, there is limited information on alcohol consumption patterns among PLHIV in sub‐Saharan Africa.Methods: Using a cross‐sectional approach, the Alcohol Use Disorders Identification Test (AUDIT‐C) was administered to PLHIV attending HIV clinics in Côte d'Ivoire, Togo, Senegal and Zambia (2013 to 2015). Hazardous drinking was defined as an AUDIT‐C score ≥4 for men or ≥3 for women, and binge drinking as ≥6 drinks at least once per month. The prevalence of binge drinking was compared to estimates from the general population using data from the World Health Organization. Factors associated with binge drinking among persons declaring any alcohol use in the past year were assessed using a logistic regression model to estimate odds ratio (OR) and their corresponding 95% confidence intervals (CI).Results: Among 1824 PLHIV (median age 39 years, 62.8% female), the prevalence of hazardous alcohol use ranged from 0.9% in Senegal to 38.4% in Zambia. The prevalence of binge drinking ranged from 14.3% among drinkers in Senegal to 81.8% in Zambia, with higher estimates among PLHIV than in the general population. Male sex (OR 2.4, 95% CI 1.6 to 3.7), tobacco use (OR 1.7, 95% CI 1.0 to 2.9) and living in Zambia were associated with binge drinking.Conclusions: Alcohol consumption patterns varied widely across settings and binge drinking was more frequent in HIV‐positive individuals compared to the general population. Interventions to reduce excessive alcohol use are urgently needed to optimize adherence in the era of universal ART.

18 January 2019 in Journal of the International AIDS Society
Verified
Journal Article
Open access
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MYMarcel Yotebieng
Marcel Yotebieng
EBEllen Brazier
Ellen Brazier
DADiane Addison
Diane Addison
AKApril D Kimmel
April D Kimmel
MCMorna Cornell
Morna Cornell
TGthe IeDEA Treat All in sub‐Saharan Africa Consensus Statement Working Group
the IeDEA Treat All in sub‐Saharan Africa Consensus Statement Working Group
Introduction: “Treat All” – the treatment of all people with HIV, irrespective of disease stage or CD4 cell count – represents a paradigm shift in HIV care that has the potential to end AIDS as a public health threat. With accelerating implementation of Treat All in sub‐Saharan Africa (SSA), there is a need for a focused agenda and research to identify and inform strategies for promoting timely uptake of HIV treatment, retention in care, and sustained viral suppression and addressing bottlenecks impeding implementation.Methods: The Delphi approach was used to develop consensus around research priorities for Treat All implementation in SSA. Through an iterative process (June 2017 to March 2018), a set of research priorities was collectively formulated and refined by a technical working group and shared for review, deliberation and prioritization by more than 200 researchers, implementation experts, policy/decision‐makers, and HIV community representatives in East, Central, Southern and West Africa.Results and discussion: The process resulted in a list of nine research priorities for generating evidence to guide Treat All policies, implementation strategies and monitoring efforts. These priorities highlight the need for increased focus on adolescents, men, and those with mental health and substance use disorders – groups that remain underserved in SSA and for whom more effective testing, linkage and care strategies need to be identified. The priorities also reflect consensus on the need to: (1) generate accurate national and sub‐national estimates of the size of key populations and describe those who remain underserved along the HIV‐care continuum; (2) characterize the timeliness of HIV care and short‐ and long‐term HIV care continuum outcomes, as well as factors influencing timely achievement of these outcomes; (3) estimate the incidence and prevalence of HIV‐drug resistance and regimen switching; and (4) identify cost‐effective and affordable service delivery models and strategies to optimize uptake and minimize gaps, disparities, and losses along the HIV‐care continuum, particularly among underserved populations.Conclusions: Reflecting consensus among a broad group of experts, researchers, policy‐ and decision‐makers, PLWH, and other stakeholders, the resulting research priorities highlight important evidence gaps that are relevant for ministries of health, funders, normative bodies and research networks.

31 March 2016 in PLOS ONE
Verified
Journal Article
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GWGilles Wandeler
Gilles Wandeler
KMKalo Musukuma-Chifulo
Kalo Musukuma-Chifulo
SZSamuel Zürcher
Samuel Zürcher
MVMichael J. Vinikoor
Michael J. Vinikoor
JLJara Llenas-García
Jara Llenas-García
IAIeDEA-Southern Africa
IeDEA-Southern Africa
Few data on the virological determinants of hepatitis B virus (HBV) infection are available from southern Africa. We enrolled consecutive HIV-infected adult patients initiating antiretroviral therapy (ART) at two urban clinics in Zambia and four rural clinics in Northern Mozambique between May 2013 and August 2014. HBsAg screening was performed using the Determine® rapid test. Quantitative real-time PCR and HBV sequencing were performed in HBsAg-positive patients. Risk factors for HBV infection were evaluated using Chi-square and Mann-Whitney tests and associations between baseline characteristics and high level HBV replication explored in multivariable logistic regression. Seventy-eight of 1,032 participants in Mozambique (7.6%, 95% confidence interval [CI]: 6.1–9.3) and 90 of 797 in Zambia (11.3%, 95% CI: 9.3–13.4) were HBsAg-positive. HBsAg-positive individuals were less likely to be female compared to HBsAg-negative ones (52.3% vs. 66.1%, p20,000 UI/mL). HBsAg-positive individuals had higher levels of ALT and AST compared to HBsAg-negative ones (both p<0.001). In multivariable analyses, male sex (adjusted odds ratio: 2.59, 95% CI: 1.22–5.53) and CD4 cell count below 200/μl (2.58, 1.20–5.54) were associated with high HBV DNA. HBV genotypes A1 (58.8%) and E (38.2%) were most prevalent. Four patients had probable resistance to lamivudine and/or entecavir. One half of HBsAg-positive patients demonstrated high HBV viremia, supporting the early initiation of tenofovir-containing ART in HIV/HBV-coinfected adults.

23 August 2022 in AIDS
Verified
Journal Article
Open access
NJNadine Jaschinski
Nadine Jaschinski
LGLauren Greenberg
Lauren Greenberg
BNBastian Neesgaard
Bastian Neesgaard
Jose M MiroJose M Miro
Jose M Miro
KGKatharina Grabmeier-Pfistershammer
Katharina Grabmeier-Pfistershammer
LRLene Ryom
Lene Ryom
Objective: Assessing whether the previously reported association between abacavir (ABC) and cardiovascular disease (CVD) remained amongst contemporarily treated people with HIV. Design: Multinational cohort collaboration. Methods: RESPOND participants were followed from the latest of 1 January 2012 or cohort enrolment until the first of a CVD event (myocardial infarction, stroke, invasive cardiovascular procedure), last follow-up or 31 December 2019. Logistic regression examined the odds of starting ABC by 5-year CVD or chronic kidney disease (CKD) D:A:D risk score. We assessed associations between recent ABC use (use within the past 6 months) and risk of CVD with negative binomial regression models, adjusted for potential confounders. Results: Of 29 340 individuals, 34% recently used ABC. Compared with those at low estimated CVD and CKD risks, the odds of starting ABC were significantly higher among individuals at high CKD risk [odds ratio 1.12 (95% confidence interval = 1.04–1.21)] and significantly lower for individuals at moderate, high or very high CVD risk [0.80 (0.72–0.88), 0.75 (0.64–0.87), 0.71 (0.56–0.90), respectively]. During 6.2 years of median follow-up (interquartile range; 3.87–7.52), there were 748 CVD events (incidence rate 4.7 of 1000 persons-years of follow up (4.3–5.0)]. The adjusted CVD incidence rate ratio was higher for individuals with recent ABC use [1.40 (1.20–1.64)] compared with individuals without, consistent across sensitivity analyses. The association did not differ according to estimated CVD (interaction P = 0.56) or CKD (P = 0.98) risk strata. Conclusion: Within RESPOND's contemporarily treated population, a significant association between CVD incidence and recent ABC use was confirmed and not explained by preferential ABC use in individuals at increased CVD or CKD risk.