Risk of Multiple Sclerosis in People Living with HIV: An International Cohort Study.

OBJECTIVE: There has been interest in a possible negative association between HIV and multiple sclerosis (MS). We aimed to compare the risk of MS in a cohort of individuals living with HIV to that in the general population. METHODS: Population-based health data were accessed for 2 cohorts of HIV-positive persons from Sweden and British Columbia, Canada. Incident MS was identified using MS registries or a validated algorithm applied to administrative data. Individuals with HIV were followed from 1 year after the first clinical evidence of HIV or the first date of complete administrative health data (Canada = April 1, 1992 and Sweden = January 1, 2001) until the earliest of incident MS, emigration, death, or study end (Canada = March 31, 2020 and Sweden = December 31, 2018). The observed MS incidence rate in the HIV-positive cohort was compared to the expected age-, sex-, calendar year-, income-specific, and region of birth-specific rates in a randomly selected sample of >20% of each general population. The standardized incidence ratio (SIR) for MS following the first antiretroviral therapy exposure ("ART-exposed") was also calculated. RESULTS: The combined Sweden-Canada cohort included 29,163 (75% men) HIV-positive persons. During 242,248 person-years of follow-up, 14 incident MS cases were observed in the HIV-positive cohort, whereas 26.19 cases were expected. The SIR for MS in the HIV-positive population was 0.53 (95% confidence interval [CI] = 0.32-0.90). The SIR for MS following the first ART exposure was 0.55 (95% CI = 0.31-0.96). INTERPRETATION: This international population-based study demonstrated a lower risk of MS among HIV-positive individuals, and HIV-positive ART-exposed individuals. These findings provide support for further exploration into the relationship among HIV, ART, and MS. ANN NEUROL 2024;95:487-494.

Expanding access to healthcare for people who use drugs and sex workers: hepatitis C elimination implications from a qualitative study of healthcare experiences in British Columbia, Canada.

BACKGROUND: Hepatitis C virus (HCV) is a major health threat in Canada. In British Columbia (BC) province, 1.6% of the population had been exposed to HCV by 2012. Prevalence and incidence of HCV are very high in populations of people who use drugs (PWUD) and sex workers (SW), who may experience unique barriers to healthcare. Consequently, they are less likely to be treated for HCV. Overcoming these barriers is critical for HCV elimination. This research sought to explore the healthcare experiences of PWUD and SW and how these experiences impact their willingness to engage in healthcare in the future, including HCV care. METHODS: Interpretive Description guided this qualitative study of healthcare experiences in BC, underpinned by the Health Stigma and Discrimination framework. The study team included people with living/lived experience of drug use, sex work, and HCV. Twenty-five participants completed in-depth semi-structured interviews on their previous healthcare and HCV-related experiences. Thematic analysis was used to identify common themes. RESULTS: Three major themes were identified in our analysis. First, participants reported common experiences of delay and refusal of care by healthcare providers, with many negative healthcare encounters perceived as rooted in institutional culture reflecting societal stigma. Second, participants discussed their choice to engage in or avoid healthcare. Many avoided all but emergency care following negative experiences in any kind of healthcare. Third, participants described the roles of respect, stigma, dignity, fear, and trust in communication in healthcare relationships. CONCLUSIONS: Healthcare experiences shared by participants pointed to ways that better understanding and communication by healthcare providers could support positive change in healthcare encounters of PWUD and SW, who are at high risk of HCV infection. More positive healthcare encounters could lead to increased healthcare engagement which is essential for HCV elimination.

Progress towards World Health Organization HIV Infection 95-95-95 measures in Newfoundland and Labrador, Canada.

The HIV program in Newfoundland and Labrador (NL) provides care for all persons living with HIV (PLWH) in NL, yet progress toward UNAIDS 95-95-95 goals for diagnosis, linkage to care and viral suppression has not previously been documented. This analysis describes engagement in HIV care and virologic outcomes for the NL cohort in 2016 and 2019 and compares this data to the Canadian HIV Observational Cohort (CANOC). A retrospective review of the NL clinic included adults aged >18 years and descriptive statistics for demographics, risk factors, and clinical variables were assessed and compared using χ2 test or Fisher's Exact test (categorical) or Wilcoxon Sum Rank test (continuous). Engagement in care and virologic outcomes for the NL cohort were consistently high over the 2016 to 2019 period with > 98% on antiretroviral therapy (ART), and > 96% having a suppressed virus load. Engagement in care and virologic outcomes among PLWH in NL is high and compares favorably to a national cohort.

Estimaciones de prevalencia del VIH por género y grupo de riesgo en Tijuana, México: 2006 / Estimating the 2006 prevalence of HIV by gender and risk groups in Tijuana, Mexico

Objetivo: Estimar la prevalencia para 2006 de HIV/sida entre población general de 15 a 49 años de edad y en los grupos de riesgo, en la ciudad de Tijuana, México. Métodos: Se obtuvieron datos demográficos del censo mexicano de 2005 y la prevalencia del VIH, de la literatura. Se construyó un modelo de prevalencia del VIH para la población general y de acuerdo con el género. El análisis de sensibilidad consistió en estimar los errores estándar del promedio-ponderado de la prevalencia del VIH y tomar derivados parciales respecto a cada parámetro. Resultados: La prevalencia del VIH resultó ser de 0.54% (N = 4,347) (rango 0.22-0.86% [N = 1750-6944]). Esto sugiere que 0.85% (rango 0.39-1.31%) de los hombres y 0.22% (rango 0.04-0.40%) de las mujeres podrían ser VIH-positivos. Los hombres que tienen sexo con hombres, las mujeres trabajadoras sexuales usuarias de drogas inyectables (UDI), las mujeres trabajadoras sexuales-no UDI, mujeres- UDI y los hombres-UDI, contribuyeron a las proporciones más elevadas de personas infectadas por el VIH. Conclusiones: El número de adultos VIH-positivos entre subgrupos de riesgo en la población de Tijuana es considerable, lo que denota la necesidad de enfocar las intervenciones de prevención en sus necesidades específicas. El presente modelo estima que hasta uno de cada 116 adultos podría ser VIH-positivo.

OBJECTIVE: Estimate the 2006 HIV prevalence among adults aged 15-49 from the general population and at-risk subgroups in Tijuana, Mexico. METHODS: Demographic data was obtained from the 2005 Mexican census and HIV prevalence data was obtained from reports in the literature. We developed a population-based HIV prevalence model for the overall population and stratified it by gender. Sensitivity analysis consisted of estimating standard errors in the weighted-average point prevalence and calculating partial derivatives of each parameter. RESULTS: HIV prevalence among adults was 0.54% (N = 4347) (range 0.22-0.86% [N = 1750-6944]). This suggests that 0.85% (range 0.39-1.31%) of men and 0.22% (0.04-0.40%) of women could have been HIV-infected in 2006. Men who have sex with men (MSM), followed by female sex workers who are injection drug users (FSW-IDU), FSW-non IDU, female IDU, and male IDU were the most at risk groups of infected individuals. CONCLUSIONS: The number of HIV-infected adults among at-risk subgroups in Tijuana is significant, highlighting the need to design tailored prevention interventions that focus on the specific needs of certain groups. According to our model, as many as 1 in 116 adults could potentially be HIV-infected.

The first ten years: achievements and challenges of the Brazilian program of universal access to HIV/AIDS comprehensive management and care, 1996-2006

A review was carried out of papers published between 1996 and 2006, documenting the introduction of highly active anti-retroviral therapy (HAART) in Brazil. Papers indexed in the MEDLINE and SciELO databases were retrieved using different combinations of keywords related to the management and care of AIDS in the post-HAART era: opportunistic diseases and co-infections, adherence to therapy, survival in the pre- and post-HAART eras, adverse events and side-effects, emergence and possible transmission of resistant viral strains, metabolic and cardiovascular disorders, and issues related to access to care and equity. The review documents the dramatic changes in HIV/AIDS disease progression in the post-HAART era, including an increase in survival and quality of life and a pronounced decrease in the episodes of opportunistic diseases. Notwithstanding such major achievements, new challenges have emerged, including slow evolving co-infections (such as hepatitis C, metabolic and cardiovascular disorders), the emergence of viral resistance, with consequences at the individual level (virological failure) and the community level (primary/secondary resistance at the population level), and impacts on the cost of new therapeutic regimens.

Procedeu-se a uma revisão abrangente de artigos publicados entre 1996-2006, período posterior à introdução da terapia anti-retroviral de alta potência (HAART) no Brasil. Foram revisados artigos disponíveis nas bases de dados MEDLINE e SciELO, a partir de combinações de palavras-chave que contemplam os principais temas na área do tratamento e manejo da AIDS na era pós-HAART: doenças oportunistas e co-infecções, aderência à terapia, sobrevida pré e pós-HAART, eventos adversos e efeitos colaterais, emergência e eventual transmissão de cepas virais resistentes e complicações cardiovasculares e metabólicas, além de questões relativas ao acesso e à eqüidade. Em suma, observa-se uma transformação profunda no campo da AIDS no período pós-HAART, com aumento dramático da sobrevida e da qualidade de vida, e redução expressiva dos episódios de doenças oportunistas. Por outro lado, novas questões se colocam, como a relevância das co-infecções de evolução lenta, como a hepatite C, os distúrbios metabólicos e cardiovasculares, e o desafio posto pela emergência de cepas resistentes, com repercussões individuais (falha virológica) e coletivas (resistência primária e secundária em nível da comunidade) e, conseqüente, aumento de custos da terapia.

The first ten years: achievements and challenges of the Brazilian program of universal access to HIV/AIDS comprehensive management and care, 1996-2006 / Os primeiros dez anos: conquistas e desafios do programa brasileiro de acesso ao manejo e cuidado integral do HIV/AIDS no Brasil, 1996-2006

Procedeu-se a uma revisão abrangente de artigos publicados entre 1996-2006, período posterior à introdução da terapia anti-retroviral de alta potência (HAART) no Brasil. Foram revisados artigos disponíveis nas bases de dados MEDLINE e SciELO, a partir de combinações de palavras-chave que contemplam os principais temas na área do tratamento e manejo da AIDS na era pós-HAART: doenças oportunistas e co-infecções, aderência à terapia, sobrevida pré e pós- HAART, eventos adversos e efeitos colaterais, emergência e eventual transmissão de cepas virais resistentes e complicações cardiovasculares e metabólicas, além de questões relativas ao acesso e à eqüidade. Em suma, observa-se uma transformação profunda no campo da AIDS no período pós-HAART, com aumento dramático da sobrevida e da qualidade de vida, e redução expressiva dos episódios de doenças oportunistas. Por outro lado, novas questões se colocam, como a relevância das co-infecções de evolução lenta, como a hepatite C, os distúrbios metabólicos e cardiovasculares, e o desafio posto pela emergência de cepas resistentes, com repercussões individuais (falha virológica) e coletivas (resistência primária e secundária em nível da comunidade) e, conseqüente, aumento de custos da terapia.

Using baseline CD4 cell count and plasma HIV RNA to guide the initiation of highly active antiretroviral therapy

Conflicting evidence regarding the impact of baseline plasma HIV RNA and CD4 cell count on survival after the initiation of highly active antiretroviral therapy (HAART) in HIV-infected patients has resulted in wide variability in the expert recommendations regarding the when to start therapy. Early initiation of HAART may result in avoidable toxicities and premature evolution of resistance, whereas delaying HAART may increase the risk of opportunistic infections and/or preclude a worse virological and clinical response to therapy. While there is widespread consensus that HAART can be delayed to a CD4 cell count of 0.350 x 10 9 cells/L, the range between this threshold and 0.200 x 10 9 cells/L remains controversial. Greater uncertainty surrounds the role of baseline plasma HIV RNA, with some guidelines recommending initiating HAART when this level rises above 55,000 c/mL regardless of baseline CD4 cell count. The following review examines the evidence in support of delaying the initiation of HAART to a CD4 cell count of 0.200 x 10 9 cells/L regardless of plasma HIV RNA levels and outlines supporting data from a Canadian prospective cohort study of antiretroviral naïve patients treated with HAART. KEY WORDS. Plasma viral load. Adherence. Viral load supression. Virologic failure. Survival.

La carga viral plasmática y el nivel de los linfocitos CD4+ en la sangre son marcadores biológicos de alto valor pronóstico, en lo que se refiere a la historia natural de la infección por HIV. Esto ha sido demostrado en forma terminante en pacientes no tratados. El impacto y valor relativo de dichos marcadores en el pronóstico de pacientes que inician terapia antirretroviral no está totalmente aclarado. Esto ha generado opiniones diversas en la literatura médica, especialmente en lo que se refiere a las recomendaciones para el inicio del tratamiento en pacientes asintomáticos. Existe acuerdo general que el inicio del tratamiento se puede demorar hasta que los linfocitos CD4+ están en un nivel de 0.350 x 10 9 cells/L. Nuestros resultados, basados en una cohorte prospectiva canadiense, demuestran que es aceptable demorar el inicio del tratamiento hasta que los linfocitos CD4+ están en un nivel de 0.200 x 10 9 cells/L sin importar el nivel de la carga viral plasmática.