Publications by authors named "Marcos A Espinal"

Background: Tuberculosis vaccine trials using disease as the primary endpoint are large, time consuming, and expensive. An earlier immunological measure of the protection against disease would accelerate tuberculosis vaccine development. We aimed to assess whether the effectiveness of the Bacillus Calmette-Guérin (BCG) vaccine for prevention of Mycobacterium tuberculosis infection was consistent with that for prevention of tuberculosis disease.

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Background: People who are incarcerated are at high risk of developing tuberculosis. We aimed to estimate the annual global, regional, and national incidence of tuberculosis among incarcerated populations from 2000 to 2019.

Methods: We collected and aggregated data for tuberculosis incidence and prevalence estimates among incarcerated individuals in published and unpublished literature, annual tuberculosis notifications among incarcerated individuals at the country level, and the annual number of incarcerated individuals at the country level.

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Article Synopsis
  • BCG vaccines are widely administered to children, yet their effectiveness in preventing tuberculosis (TB) and mortality, especially in older populations, is still debated.
  • The study conducts a systematic review and meta-analysis of existing data from TB contact studies to evaluate the impact of BCG vaccination on TB development and mortality, focusing on age-specific effects.
  • A total of 14,927 records were found in the search for eligible studies published between 1998 and 2018, shaping the analysis of both prevalent and incident TB cases among vaccinated individuals.
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The COVID-19 pandemic has disrupted implementation of health interventions and set back priority programs aiming to control and eliminate communicable diseases. At the same time, the pandemic has opened up opportunities to expedite innovations in health service delivery to increase effectiveness and position health on the development and political agendas of leaders and policy makers. In this context, we present an integrated, sustainable approach to accelerate elimination of more than 35 communicable diseases and related conditions in the region of the Americas.

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In the past decade, tuberculosis incidence has declined in much of the world, but has risen in central and South America. It is not yet clear what is driving this reversal of progress in tuberculosis control. Since 2000, the incarcerated population in central and South America has grown by 206%, the greatest increase in the world.

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Background: Shigellosis is the second leading cause of diarrheal death globally. The global burden has been complicated by the emergence of Shigella strains resistant to first line antibiotic treatments such as ciprofloxacin. This study aims to describe the epidemiologic distribution of the most common Shigella species, and their antimicrobial susceptibility patterns to ciprofloxacin and nalidixic acid (NA) in Latin America.

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Article Synopsis
  • There are more cases of diseases spread by insects, like dengue and yellow fever, happening in the Americas, which is a big health concern.
  • Chikungunya and Zika viruses also spread quickly in recent years, causing serious health problems for many people.
  • The article talks about the difficulties in tracking these diseases, the need for better prevention methods, and how only a few vaccines are available for these viruses right now.
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More than 700,000 cases of Zika virus (ZIKAV) disease have been officially reported to the Pan American Health Organization (PAHO) from 48 countries and territories of the Americas. The response led by the PAHO and partners suggests major lessons of this outbreak. A seemingly innocuous pathogen became the new villain, causing fear, economic losses and, most importantly, debilitating birth defects and neurological problems, reaffirming the well-known war principle of never to underestimate one's opponent.

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Zika virus, a mosquito-borne flavivirus that can cause rash with fever, emerged in the Region of the Americas on Easter Island, Chile, in 2014 and in northeast Brazil in 2015 (1). In response, in May 2015, the Pan American Health Organization (PAHO), which serves as the Regional Office of the Americas for the World Health Organization (WHO), issued recommendations to enhance surveillance for Zika virus. Subsequently, Brazilian investigators reported Guillain-Barré syndrome (GBS), which had been previously recognized among some patients with Zika virus disease, and identified an association between Zika virus infection during pregnancy and congenital microcephaly (2).

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Background: Data on maternal deaths occurring after the 42 days postpartum reference time is scarce; the objective of this analysis is to explore the trend and magnitude of late maternal deaths and deaths from sequelae of obstetric causes in the Americas between 1999 and 2013, and to recommend including these deaths in the monitoring of the Sustainable Development Goals (SDGs).

Methods: Exploratory data analysis enabled analyzing the magnitude and trend of late maternal deaths and deaths from sequelae of obstetric causes for seven countries of the Americas: Argentina, Brazil, Canada, Colombia, Cuba, Mexico and the United States. A Poisson regression model was developed to compare trends of late maternal deaths and deaths from sequelae of obstetric causes between two periods of time: 1999 to 2005 and 2006 to 2013; and to estimate the relative increase of these deaths in the two periods of time.

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Article Synopsis
  • The study aimed to identify key social factors driving tuberculosis (TB) rates in Latin America and the Caribbean, which has high socioeconomic inequality.
  • Researchers analyzed data from 20 countries between 1995 and 2012, using regression models to examine the link between TB incidence and various social determinants.
  • Findings revealed that higher health expenditure and better sanitation access correlated with lower TB rates, while inequalities in these factors persisted, affecting the incidence of TB significantly across different countries.
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Background: Leptospirosis is an epidemic-prone neglected disease that affects humans and animals, mostly in vulnerable populations. The One Health approach is a recommended strategy to identify drivers of the disease and plan for its prevention and control. In that context, the aim of this study was to analyze the distribution of human cases of leptospirosis in the State of Rio Grande do Sul, Brazil, and to explore possible drivers.

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Malaria has declined in recent years in countries of the American continents. In 2011, 12 of 21 endemic countries had already met their 2015 Millennium Development Goal. However, this declining trend has not been adequately evaluated.

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Leptospirosis is an epidemic-prone zoonotic disease that occurs worldwide, with more than 500,000 human cases reported annually. It is influenced by environmental and socioeconomic factors that affect the occurrence of outbreaks and the incidence of the disease. Critical areas and potential drivers for leptospirosis outbreaks have been identified in Nicaragua, where several conditions converge and create an appropriate scenario for the development of leptospirosis.

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Article Synopsis
  • Plague remains a public health concern in Latin America, with cases identified in Bolivia, Brazil, Ecuador, and Peru, despite its historical decline since the first recorded case in 1899.
  • A study mapped the persistence of plague across 14 of 25 Latin American countries and identified ongoing human cases in 18 counties, highlighting demographic and environmental factors linked to these outbreaks.
  • The findings emphasize the need for targeted interventions to prevent potential re-emergence of plague, suggesting that countries should focus on areas with historical cases and specific risk factors.
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Article Synopsis
  • This special issue focuses on leptospirosis, a zoonotic disease linked to acute fevers, mostly in tropical regions.
  • It is considered a growing public health issue, raising concerns about its epidemic potential.
  • The disease has a notable health impact globally, indicating the need for increased awareness and research.
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Human rabies transmitted by dogs is considered a neglected disease that can be eliminated in Latin America and the Caribbean (LAC) by 2015. The aim of this paper is to discuss canine rabies policies and projections for LAC regarding current strategies for achieving this target and to critically review the political, economic and geographical factors related to the successful elimination of this deadly disease in the context of the difficulties and challenges of the region. The strong political and technical commitment to control rabies in LAC in the 1980s, started with the regional programme coordinated by the Pan American Health Organization.

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Objective: To describe the current situation and trends in mortality due to cardiovascular disease (CVD) in the Americas and explore their association with economic indicators.

Design And Setting: This time series study analysed mortality data from 21 countries in the region of the Americas from 2000 to the latest available year.

Main Outcomes Measures: Age-adjusted death rates, annual variation in death rates.

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