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BACKGROUND: Serotype 3 pneumococcal disease has not substantially declined at the population level after the routine introduction of 13-valent pneumococcal conjugate vaccine (PCV13) into pediatric immunization programs across the globe. This epidemiological finding has generated debate regarding the effectiveness of PCV13 against serotype 3 disease. Evaluating PCV13 effectiveness against serotype 3 is especially critical in adults, where serotype 3 makes up an important amount of remaining pneumococcal disease. METHODS: We performed a systematic review of the published literature to assess the direct effectiveness of PCV13 against serotype 3 community-acquired pneumonia (CAP) among adults. We then estimated overall vaccine effectiveness (VE) using a pooled analysis of the individual-level, raw data. RESULTS: Two published studies met inclusion criteria. One was a randomized controlled trial conducted in the Netherlands and published in 2014. The other was a recently-published case-control study conducted in Louisville, Kentucky that used a test-negative design (TND). We also identified a third TND study conducted in Argentina that was recently presented as a conference abstract but is not yet published. All three studies were conducted in adults aged ≥65 years. PCV13 VE against serotype 3 hospitalized CAP was 52.5% (95%CI: 6.2-75.9%) from the pooled analysis of individual-level data from all three studies. Results were similar if the unpublished estimate was excluded (serotype 3 VE = 53.6% [95%CI: 6.7-76.9%]). No heterogeneity was observed. CONCLUSIONS: Currently-available evidence, although limited to three studies, suggests that PCV13 provides direct protection against serotype 3 hospitalized CAP in adults aged ≥65 years.

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Influenza exacts a heavy burden on the elderly, a segment of the population that is estimated to experience rapid growth in the near future. In the past decade most developed and several developing countries have recommended influenza vaccination for those > 65 years of age. The World Health Organization (WHO) set a goal of 75% influenza vaccination coverage among the elderly by 2010, but it was not achieved. In 2011, the Technical Advisory Group at the Pan American Health Organization, Regional Office of WHO for the Americas, reiterated the influenza vaccine recommendation for older adults. Relatively little information has been compiled on the immunological aspect of aging or on reducing its impact, information particularly relevant for clinicians and gerontologist with firsthand experience confronting its effects. To fill this data gap, in 2012 the Americas Health Foundation (Washington, D.C., United States) and the nonprofit, Fighting Infectious Diseases in Emerging Countries (Miami, Florida, United States), convened a panel of Latin American clinicians and gerontologists with expertise in influenza to discuss key issues and develop a consensus statement. The major recommendations were to improve influenza surveillance throughout Latin America so that its impact can be quantified; and to conduct laboratory confirmation of influenza for all patients who have flu-like symptoms and are frail, immunosuppressed, have comorbidities, are respiratory compromised, or have been admitted to a hospital. The panel also noted that: since evidence for antivirals in the elderly is unclear, their use should be handled on a case-by-case basis; despite decreased immunological response, influenza vaccination in older adults is still crucial; indirect immunization strategies should be encouraged; and traditional infection control measures are essential in long-term care facilities.

La gripe representa una fuerte carga para los ancianos, un segmento de la población que, según los cálculos, experimentará un rápido crecimiento en un futuro próximo. En el último decenio, la mayor parte de los países desarrollados y varios países en desarrollo han recomendado la vacunación antigripal de las personas mayores de 65 años de edad. La Organización Mundial de la Salud (OMS) estableció la meta de una cobertura de vacunación antigripal de 75% de los ancianos para el año 2010, pero no se alcanzó. En el 2011, el Grupo Consultivo Técnico de la Organización Panamericana de la Salud, Oficina Regional de la OMS para la Región de las Américas, reiteró la recomendación de la vacunación antigripal de los adultos mayores. Se ha recabado relativamente poca información sobre los aspectos inmunológicos del envejecimiento o sobre cómo reducir su repercusión, información particularmente pertinente para médicos clínicos y gerontólogos que deben afrontar de primera mano sus efectos. Para salvar esta brecha en materia de datos, en el 2012, la Americas Health Foundation (Washington, D.C., Estados Unidos) y la Fighting Infectious Diseases in Emerging Countries (fundación sin ánimo de lucro para la lucha contra las enfermedades infecciosas en los países emergentes, con sede en Miami, Florida, Estados Unidos) convocaron un grupo de expertos, médicos clínicos y gerontólogos latinoamericanos con pericia en el tema de la gripe, con objeto de debatir aspectos clave y elaborar una declaración de consenso. Las principales recomendaciones fueron mejorar la vigilancia de la gripe en toda América Latina para que pudiera cuantificarse su repercusión; y llevar a cabo la confirmación de laboratorio en todos los pacientes con síntomas similares a los de la gripe debilitados, inmunodeprimidos, con comorbilidades, con compromiso respiratorio o que hubieran sido ingresados en un hospital. El grupo de expertos también señaló que, dado que no existen datos probatorios claros en relación con los antivíricos en los ancianos, su uso debe manejarse caso por caso; que, a pesar de la reducción de la respuesta inmunitaria, la vacunación antigripal en adultos mayores sigue siendo crucial; que se deben promover las estrategias de vacunación indirecta; y que, en los establecimientos de asistencia a largo plazo, las medidas tradicionales de control de las infecciones son esenciales.

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In Latin America, adult influenza is a serious disease that exacts a heavy burden in terms of morbidity, mortality, and cost. Although much has been written about the disease itself, relatively little information has been compiled on what could be done to reduce its impact across the region, particularly from the perspective of clinicians with first-hand experience in confronting its effects. To fill this data gap, in 2011, the Pan American Health and Education Foundation (PAHEF) and the U.S.-based nonprofit Fighting Infectious Diseases in Emerging Countries (FIDEC) organized a conference and convened a panel of Latin American scientist-clinicians with experience and expertise in adult influenza in the region tol) discuss the major issues related to the disease and 2) develop and produce a consensus statement summarizing its impact as well as current efforts to diagnose, prevent, and treat it. The consensus panel concluded a more concerted and better-coordinated effort was needed to reduce the adverse impact of seasonal influenza and future pandemics, including more surveillance, more active involvement by both governmental and nongovernmental organizations, and a much greater effort to vaccinate more adults, especially those at high risk of contracting the disease. In addition, a new approach for diagnosing influenza was recommended.

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In Latin America, adult influenza is a serious disease that exacts a heavy burden in terms of morbidity, mortality, and cost. Although much has been written about the disease itself, relatively little information has been compiled on what could be done to reduce its impact across the region, particularly from the perspective of clinicians with firsthand experience in confronting its effects. To fill this data gap, in 2011, the Pan American Health and Education Foundation (PAHEF) and the U.S.-based nonprofit Fighting Infectious Diseases in Emerging Countries (FIDEC) organized a conference and convened a panel of Latin American scientistclinicians with experience and expertise in adult influenza in the region tol) discuss the major issues related to the disease and 2) develop and produce a consensus statement summarizing its impact as well as current efforts to diagnose, prevent, and treat it. The consensus panel concluded a more concerted and better-coordinated effort was needed to reduce the adverse impact of seasonal influenza and future pandemics, including more surveillance, more active involvement by both governmental and nongovernmental organizations, and a much greater effort to vaccinate more adults, especially those at high risk of contracting the disease. In addition, a new approach for diagnosing influenza was recommended.

En América Latina, la gripe en adultos es una enfermedad grave que impone una carga importante en cuanto a la morbilidad, la mortalidad y el costo. Aunque se ha escrito mucho acerca de la enfermedad en sí, se ha recopilado relativamente escasa información sobre lo que podría hacerse para reducir su repercusión en la región, en particular desde la perspectiva de los médicos con experiencia directa en afrontar sus efectos. Para compensar esta falta de información, en 2011 la Fundación Panamericana de la Salud y Educación (PAHEF) y la organización sin fines de lucro establecida en los Estados Unidos Fighting Infectious Diseases in Emerging Countries (FIDEC) organizaron una conferencia y convocaron a un panel de científicos y médicos latinoamericanos con experiencia y conocimientos especializados en la gripe en adultos en la región a fin de 1) analizar los temas principales relacionados con la enfermedad y 2) elaborar y emitir una declaración de consenso que resuma la repercusión, así como los logros actuales en el diagnóstico, la prevención y el tratamiento de la enfermedad. El panel de consenso llegó a la conclusión que se requieren esfuerzos más concertados y mejor coordinados para reducir la repercusión adversa de la gripe estacional y las pandemias futuras, que comprenden una mayor vigilancia, una participación más activa de las organizaciones gubernamentales y no gubernamentales y un esfuerzo mucho mayor para vacunar a más adultos, en especial a las personas que presentan un riesgo elevado de contraer la enfermedad. Además, se recomendó un nuevo enfoque para diagnosticar la gripe.

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Antibiotics are universally prescribed drugs. Because they exert selective pressure and because of the innate bacterial ability for adaptation, even the appropriate clinical use of these potentially life-preserving agents inevitably fosters the development and spread of resistance by a variety of microorganisms. Inappropriate use has accelerated and increased the magnitude of a problem that is now considered a public health crisis. For Gram-positive pathogens some compounds offer limited hope, but for Gram-negative organisms no new drugs with radically increased spectra are available for clinical trials. Patients with serious infections due to multiresistant organisms are experiencing adverse, sometimes fatal, clinical outcomes. Use of multiple drugs increases side effects and exposes additional susceptible bacteria to selective pressure. There is evidence that the appropriate use of currently available antibiotics can be associated with a reduction of the spread of resistance. Antibiotic stewardship programmes and the antibiotic 'care bundle' approach can be effective measures to lengthen the useful life of antibiotics and can be implemented in most clinical situations.

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The global spread of dengue fever within and beyond the usual tropical boundaries threatens a large percentage of the world's population, as human and environmental conditions for persistence and even spread are present in all continents. The disease causes great human suffering, a sizable mortality from dengue haemorrhagic fever and its complications, and major costs. This situation has worsened in the recent past and may continue to do so in the future. Efforts to decrease transmission by vector control have failed, and no effective antiviral treatment is available or foreseeable on the immediate horizon. A safe and effective vaccine protective against all serotypes of dengue viruses is sorely needed.

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The clinical and economic burden of adult community-acquired pneumonia (CAP) in Latin America is not well known. We conducted a literature review to describe the etiology, incidence, hospitalization, morbidity and mortality, antibiotic resistance, costs associated with care, and the potential benefits of pneumococcal vaccination in the reduction of adult CAP in Latin America. Data that were published during the period from January 1970 through August 2008 were identified via the Web sites and databases of the Pan American Health Organization, Latin American health agencies, and the US National Institutes of Health, National Library of Medicine (MEDLINE). Streptococcus pneumoniae was identified as the most common pathogen, accounting for up to 35% of CAP cases. The mean rate of CAP due to penicillin-resistant S. pneumoniae was 39%. The mortality in Latin America due to lower respiratory tract infections has been reported to be 6%, compared with 4% in developed regions, and CAP was the third most frequent cause of death in adults in 31 Latin American countries in 2001-2003. Although S. pneumoniae caused the majority of CAP, similar to other regions of the world, mortality due to CAP in Latin America was substantially greater than that in developed countries. This review demonstrates the need to facilitate standardized surveillance and reporting systems to monitor the burden of CAP and to implement prevention strategies to decrease the clinical and economic burden of CAP in Latin American adults.

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