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      Sistema Regional de Vacunas (SIREVA), vigilancia por laboratorio y desarrollo de vacunas para Streptococcus pneumoniae: análisis bibliométrico, 1993-2019 Translated title: Regional System for Vaccines (SIREVA), laboratory surveillance and vaccine development for Streptococcus pneumoniae: bibliometric analysis, 1993-2019

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          RESUMEN

          Objetivo.

          Medir a través del análisis bibliométrico la productividad, la visibilidad y el impacto del Sistema Regional de Vacunas (SIREVA, un proyecto de la Organización Panamericana de la Salud) en sus dos componentes, la vigilancia por laboratorio y el desarrollo de vacunas.

          Métodos.

          Se recuperaron de Scopus las publicaciones correspondientes a vigilancia por laboratorio y desarrollo de vacunas con sus referencias y citas y se aplicó la herramienta para obtener los indicadores bibliométricos. Se utilizó VOSviewer ® 1.6.13 para visualizar las redes de coautoría por país y autores, y para realizar un análisis de coocurrencia de términos incluidos en los títulos y resúmenes de las publicaciones.

          Resultados.

          Cumplieron los criterios establecidos para vigilancia por laboratorio y desarrollo de vacunas 173 y 128 publicaciones, respectivamente. Diez países de la Región fueron responsables de 90,8% de las publicaciones sobre vigilancia por laboratorio y 8 países de todas las publicaciones sobre desarrollo de vacunas. Las diez publicaciones más citadas sobre vigilancia por laboratorio y sobre desarrollo de vacunas estaban incluidas en 855 y 503 artículos, respectivamente; los principales autores se encontraban en Alemania, Australia, Bélgica, Brasil, China, Estados Unidos de América y el Reino Unido. La construcción y visualización de redes por coautorías de autores y países, y la coocurrencia de términos mostraron el trabajo en red y la colaboración intrarregional, así como permitieron hacer seguimiento a las diversas áreas de estudio y su evolución en el tiempo.

          Conclusiones.

          El análisis bibliométrico permitió documentar de manera objetiva la productividad y visibilidad del Sistema Regional de Vacunas para Streptococcus pneumoniae en la Región.

          ABSTRACT

          Objective.

          To measure through bibliometric analysis the productivity, visibility and impact of the Regional System for Vaccines (SIREVA, a project by the Pan American Health Organization), including its two components laboratory surveillance and vaccine development.

          Methods.

          Publications about laboratory surveillance and vaccine development were recovered from Scopus, including their references and citations, and their bibliometric indicators were analyzed. VOSviewer 1.6.13 ® was used to visualize the co-authorship networks, by country and authors, and to perform a cooccurrence analysis of terms included in the titles and abstracts of the publications.

          Results.

          The criteria for laboratory surveillance and vaccine development were met by 173 and 128 publications, respectively. Ten countries in the Region of the Americas were responsible for 90.8% of the publications on laboratory surveillance and 8 for all publications on vaccine development. The 10 most cited publications on laboratory surveillance and on vaccine development were included in 855 and 503 articles, respectively, the main authors being from Australia, Belgium, Brazil, China, Germany, the United Kingdom and the United States of America. Network building and visualization by author and country co-authors, and co-occurrence of terms showed networking and intraregional collaboration, and allowed for the follow-up of study areas and evolution over time.

          Conclusions.

          The bibliometric analysis allowed to objectively record the productivity and visibility of the Regional System for Vaccines for Streptococcus pneumoniae in the Region.

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          Most cited references32

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          Discovery of a new capsular serotype (6C) within serogroup 6 of Streptococcus pneumoniae.

          Using two monoclonal antibodies, we found subtypes among pneumococcal isolates that are typed as serotype 6A by the quellung reaction. The prevalent subtype bound to both monoclonal antibodies and was labeled here 6Aalpha, whereas the minor subtype bound to only one monoclonal antibody and was labeled 6Abeta. To determine the biochemical nature of the two serologically defined subtypes, we purified capsular polysaccharides (PSs) from the two subtypes and examined their chemical structures with gas-liquid chromatography and mass spectrometry. The study results for 6Aalpha PS are consistent with the previously published structure of 6A PS, which is -->2) galactose (1-->3) glucose (1-->3) rhamnose (1-->3) ribitol (5-->phosphate. In contrast, the 6Abeta PS study results show that its repeating unit is -->2) glucose 1 (1-->3) glucose 2 (1-->3) rhamnose (1-->3) ribitol (5-->phosphate. We propose to continue referring to 6Aalpha as serotype 6A but to refer to 6Abeta as serotype 6C. Serotype 6C would thus represent the 91st pneumococcal serotype, with 90 pneumococcal serotypes having previously been recognized. This study also demonstrates that a new serotype may exist within an established and well-characterized serogroup or serotype.
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            Effectiveness of ten-valent pneumococcal conjugate vaccine against invasive pneumococcal disease in Brazil: a matched case-control study.

            In March 2010, Brazil introduced the ten-valent pneumococcal conjugate vaccine (PCV10), which was licensed based on non-inferiority of immunological correlates of protection compared with the seven-valent vaccine. The schedule comprised three primary doses at ages 2 months, 4 months, and 6 months, and a booster dose at age 12 months. A single catch-up dose was offered for children aged 12-23 months at the time of introduction. We assessed PCV10 effectiveness against invasive pneumococcal disease in Brazilian children. Invasive pneumococcal disease, defined as isolation of Streptococcus pneumoniae from blood, cerebrospinal fluid, or another normally sterile site, was identified in children age-eligible for at least one PCV10 dose through laboratory-based and hospital-based surveillance in ten states in Brazil from March 1, 2010, until Dec 31, 2012. We aimed to identify four age-matched and neighbourhood-matched controls for each case. We used conditional logistic regression and calculated PCV10 effectiveness as (1-adjusted matched odds ratio) × 100% for vaccine-type and vaccine-related serotypes (ie, in the same serogroup as a vaccine serotype). In 316 cases (median age 13·2 months, range 2·6-53·1) and 1219 controls (13·3 months, 2·6-53·1), the adjusted effectiveness of an age-appropriate PCV10 schedule was 83·8% (95% CI 65·9-92·3) against vaccine serotypes, and 77·9% (41·0-91·7) against vaccine-related serotypes. Serotype-specific effectiveness was shown for the two most common vaccine serotypes-14 (87·7%, 60·8-96·1) and 6B (82·8%, 23·8-96·1)-and serotype 19A (82·2%, 10·7-96·4), a serotype related to vaccine serotype 19F. A single catch-up dose in children aged 12-23 months was effective against vaccine-type disease (68·0%, 17·6-87·6). No significant effectiveness was shown against non-vaccine serotypes for age-appropriate or catch-up schedules. In the routine immunisation programme in Brazil, PCV10 prevents invasive disease caused by vaccine serotypes. PCV10 might provide cross-protection against some vaccine-related serotypes. Brazilian Ministry of Health, Pan-American Health Organization, and US Centers for Disease Control and Prevention. Copyright © 2014 Elsevier Ltd. All rights reserved.
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                Author and article information

                Journal
                Rev Panam Salud Publica
                Rev. Panam. Salud Publica
                rpsp
                Revista Panamericana de Salud Pública
                Organización Panamericana de la Salud
                1020-4989
                1680-5348
                06 August 2020
                2020
                : 44
                : e80
                Affiliations
                [1 ] orgnameConsultor independiente Washington D.C. Estados Unidos de América originalConsultor independiente, Washington D.C., Estados Unidos de América.
                [2 ] orgnameInstituto Nacional de Salud Bogotá Colombia originalInstituto Nacional de Salud, Bogotá, Colombia.
                Author notes
                Article
                RPSP.2020.80
                10.26633/RPSP.2020.80
                7406127
                32774349
                8c4c5003-e015-4633-bdf0-b6785740de6d

                Este es un artículo de acceso abierto distribuido bajo los términos de la licencia Creative Commons Attribution-NonCommercial-NoDerivs 3.0 IGO, que permite su uso, distribución y reproducción en cualquier medio, siempre que el trabajo original se cite de la manera adecuada. No se permiten modificaciones a los artículos ni su uso comercial. Al reproducir un artículo no debe haber ningún indicio de que la OPS o el artículo avalan a una organización o un producto específico. El uso del logo de la OPS no está permitido. Esta leyenda debe conservarse, junto con la URL original del artículo.

                History
                : 17 March 2020
                : 14 May 2020
                Page count
                Figures: 7, Tables: 1, Equations: 0, References: 35
                Categories
                Investigación Original

                streptococcus pneumoniae,vacunas,bibliometría,vigilancia,américa latina,vaccines,bibliometrics,surveillance,latin america

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