Publications by authors named "Thiago Torres"

Article Synopsis
  • The rising rates of sexually transmitted infections (STIs) have heightened health concerns, prompting research into doxycycline postexposure prophylaxis (doxyPEP) as a preventive strategy for bacterial STIs.
  • A study was conducted in San Francisco to evaluate how the introduction of doxyPEP guidelines affected reported cases of chlamydia, gonorrhea, and early syphilis among men who have sex with men (MSM) and transgender women.
  • Results revealed a significant decrease in STI cases among these populations after the implementation of doxyPEP guidelines, with chlamydia and early syphilis cases declining by 6.58% and 2.68% per month, respectively, compared to
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Background: The COVID-19 pandemic had great impact on HIV care and prevention worldwide, including in Brazil. We compared HIV testing, recent infection, and annualized incidence according to the COVID-19 pandemic period among cisgender men who have sex with men (MSM) and transgender women (TGW).

Setting: HIV and sexually transmitted infection testing, prevention, and treatment referral service in Rio de Janeiro, Brazil.

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Young men who have sex with men in Brazil face vulnerability to HIV and display lower PrEP uptake and adherence. Understanding their engagement with digital technologies can better inform mobile health (mHealth) strategies for HIV prevention and care. As part of the Conectad@s study, a HIV status-neutral prevention and care intervention for young men who have sex with men, we conducted semi-structured interviews and focus group discussions with 38 participants between January-February 2021.

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Neuroacanthocytosis syndromes are rare inherited neurodegenerative disorders, characterized by the presence of acanthocytes. Among them, Choreoacanthocytosis and McLeod syndrome stand out, sharing similarities with Huntington's disease, including choreic movement disorders, psychiatric symptoms, and cognitive decline. The case described involves a 36-year-old patient with cognitive deficits, involuntary movements, and ataxic gait.

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Article Synopsis
  • Pre-exposure prophylaxis (PrEP) is an effective method for preventing HIV, but in India, where private healthcare dominates, there's a lack of information on who is benefiting from it.
  • A study used the Grindr app to survey sexual and gender minorities in India, revealing that only 30.3% were aware of PrEP and just 3.1% were currently using it, with awareness and use linked to socio-behavioral factors.
  • The findings indicate low overall awareness and use of PrEP, particularly among lower-income groups, suggesting that integrating PrEP into government and NGO programs could help increase its adoption and combat HIV.
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Background And Objective: Advances in antiretroviral therapy led to an increase in life expectancy among people living with human immunodeficiency virus (HIV). As aging is characterized by several physiological changes that can influence pharmacokinetics (PK), this systematic review aims to describe the impact of aging on the PK of antiretrovirals (ARV) approved by the Food and Drug Administration (FDA) before 2005.

Methods: Searches were performed in BVS, EMBASE, and PubMed databases for publications until June 2024.

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Background: Although long-acting, injectable cabotegravir (CAB-LA) pre-exposure prophylaxis (PrEP) has proven efficacious for HIV prevention in clinical trials, research is needed to guide effective implementation in real-world settings. Formative work with community members and health care providers (HCPs) is important to provide insight into the needs and contexts of specific populations and reveal potential barriers and facilitators for implementation projects.

Objective: We aimed to describe the results from formative work to develop an implementation package for CAB-LA PrEP within the ImPrEP CAB Brasil study.

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Background: The global burden of sexually transmitted infections (STIs) poses a challenge in the context of HIV pre-exposure prophylaxis (PrEP) programmes. We aimed to explore factors associated with prevalent, incident, and recurrent STIs in men who have sex with men (MSM) and transgender women on PrEP in Brazil, Mexico, and Peru.

Methods: ImPrEP was a prospective, single-arm, open-label, multicentre study that enrolled MSM and transgender women in the context of the public health systems of Brazil (14 sites), Mexico (four sites), and Peru (ten sites) between February, 2018, and June, 2021.

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Article Synopsis
  • The study aimed to assess the occurrence and features of concurrent bacterial sexually transmitted infections (bSTIs) in individuals diagnosed with mpox in Rio de Janeiro, Brazil.
  • Out of 634 participants, 538 were tested for STIs; the overall rate of bSTIs was found to be 37.3%, primarily affecting cisgender men aged 30-39, with many also living with HIV.
  • The findings highlight the significant coexistence of bSTIs in mpox patients, suggesting a need for better sexual health strategies that include mpox in diagnoses and preventive measures.
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Background: In Brazil, ~35% of people living with HIV (PLHIV) have poor adherence to antiretroviral therapy (ART). HIV-related stigma is associated with worst continuum of care outcomes, however evidence from Brazil is scarce. We explored pathways between HIV-related stigma dimensions and ART adherence among Brazilian cisgender gay, bisexual and other men who have sex with men (MSM) living with HIV.

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Following the 2022 global mpox outbreak, diagnoses decreased worldwide, even in settings with limited vaccine access. In 2023-2024, a new outbreak emerged in Rio de Janeiro, Brazil, highlighting the importance of continuous surveillance, preventive measures such as vaccination in vulnerable populations, and treatment options, emphasizing equitable global health technology distribution.

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Background: Household transmission studies seek to understand the transmission dynamics of a pathogen by estimating the risk of infection from household contacts and community exposures. We estimated within/extra-household SARS-CoV-2 infection risk and associated factors in a household cohort study in one of the most vulnerable neighbourhoods in Rio de Janeiro city.

Methods: Individuals ≥1 years-old with suspected or confirmed COVID-19 in the past 30 days (index cases) and household members aged ≥1 year were enrolled and followed at 14 and 28 days (study period November/2020-December/2021).

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Background: Young gay, bisexual, and other men who have sex with men (YMSM) in Latin America experience disproportionately high rates of HIV. While new case numbers have stabilised in other demographics, the incidence of HIV in this particular group continues to rise. We estimated the prevalence of HIV and sexually transmitted infections (STI) and identified correlates of new HIV diagnoses among YMSM in Brazil.

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Article Synopsis
  • This study assessed the diagnostic performance of two antigen-detecting rapid tests for SARS-CoV-2 in resource-limited settings in Salvador, Brazil, focusing on individuals with COVID-19 symptoms or exposure.
  • The Abbott and WAMA tests both exhibited high specificity (100%) but lower sensitivity rates (52.7% and 53.4%, respectively), particularly when compared to the gold standard RT-PCR.
  • While both tests are effective for quickly identifying potential COVID-19 cases, negative results require careful clinical evaluation, especially for patients with lower viral loads indicated by Cycle Threshold values below 24.
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We conducted a systematic review to explore the relationship between perceived risk for HIV acquisition and sexual HIV exposure among sexual and gender minorities. We included 39 studies divided into (i) correlations or associations, (ii) models using sexual HIV exposure as the outcome, and (iii) models using perceived risk for HIV acquisition as the outcome. The sample size range was from 55 to 16,667 participants, primarily cisgender men who have sex with men (73.

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We aimed to validate the Health Care Provider HIV/AIDS Stigma Scale (HPASS) among healthcare students in Brazil. The validation process occurred in three phases from August 2022 to July 2023: translation and cross-cultural adaptation; content validity assessment involving four experts; and evaluation of psychometric properties among 553 healthcare students from the Federal University of Espírito Santo. We used exploratory factor analysis and convergent validity for structural validation.

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Background: Several systems of oppression combine in complex ways to impact the lives of minority populations. Following an intersectionality framework, we assessed the frequency and perceived reasons for discrimination among gay, bisexual, and other cisgender men who have sex with men (MSM) and transgender and non-binary individuals (TGNB), stratified by race.

Methods: Online survey among MSM and TGNB ≥18 years living in Brazil, between November/2021 and January/2022.

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Background: A growing number of mobile health (mHealth) technologies are being developed to support HIV preexposure prophylaxis (PrEP) adherence and persistence; however, most tools have focused on men who have sex with men (MSM), and few are available in Spanish. To maximize the potential impact of these tools in reducing gender and racial/ethnic disparities and promoting health equity, mHealth tools tailored to Spanish-speaking people and transgender women are critically needed.

Objective: The aim of this study is to adapt and tailor 2 mHealth technologies, PrEPmate and DOT Diary, to support daily PrEP adherence and persistence among Spanish-speaking MSM and English- and Spanish-speaking transgender women and to evaluate the feasibility and acceptability of these tools.

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Introduction: Although strong scientific evidence of the efficacy and effectiveness of treatment-as-prevention (TasP) is available, full endorsement of the "Undetectable = Untransmittable" (U = U) and "zero-risk" messages could be improved. Increasing knowledge about HIV transmission, prevention and treatment is a critical component of care efforts. The study assessed knowledge of HIV transmission and prevention strategies, and the perceived accuracy of the slogan U = U among sexual and gender minorities (SGM) in Brazil.

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Introduction: Antiretroviral therapy increased the survival and life expectancy of People living With HIV (PWH). Frailty-related syndromes among older PWH (aged 50+ years) may affect their Health-related Quality of Life (HQoL). Additionally, the COVID-19 pandemic has impacted health-related outcomes.

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Background: HIV incidence estimation is critical for monitoring the HIV epidemic dynamics and the effectiveness of public health prevention interventions. We aimed to identify sexual and gender minorities (SGM) with recent HIV infections, factors associated with recent HIV infection, and to estimate annualised HIV incidence rates.

Methods: Cross-sectional multicentre study in HIV testing services in Brazil and Peru (15 cities).

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Background: Cisgender men were mostly affected during the 2022 mpox multinational outbreak, with few cases reported in women. This study compares the characteristics of individuals diagnosed with mpox infection according to gender in Rio de Janeiro.

Methods: We obtained surveillance data of mpox cases notified to Rio de Janeiro State Health Department (June 12 to December 15, 2022).

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Sexual and gender minorities (SGM) using online venues in India are usually not reached by government HIV interventions, remaining an understudied yet important population. We investigated sociodemographic characteristics, sexual behaviours along with familiarity, knowledge, and correlated factors around perceived accuracy of the Undetectable = Untransmittable (U = U) slogan. Grindr users in India completed an online, cross-sectional survey in May-June 2022.

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Objectives: This study aimed to analyze characteristics of mpox hospitalization in a Brazilian cohort, further exploring the impact of HIV on mpox-related outcomes and hospitalization.

Design: We conducted a descriptive analysis, comparing characteristics of individuals diagnosed with mpox according to hospitalization and HIV status, and described the mpox cases among those living with HIV.

Methods: This was a single-center, prospective cohort study conducted at a major infectious diseases referral center in Rio de Janeiro, Brazil, that enrolled participants older than 18 years of age diagnosed with mpox.

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Background: Gay, bisexual, and other men who have sex with men (MSM) with a higher perceived risk of HIV are more aware of and willing to use pre-exposure prophylaxis (PrEP). PrEP is an effective HIV prevention strategy, but there is a lack of data on how PrEP use might moderate the relationship between sexual risk behavior and perceived risk of HIV. Moreover, most studies measure perceived risk of HIV via a single question.

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