Impacto poblacional a 10 años de la vacunación contra rotavirus en México / Population impact of rotavirus vaccination in Mexico after 10 years

Resumen: Objetivo: Evaluar el impacto de la vacunación contra rotavirus (RV) a 10 años de su universalización sobre la morbimortalidad por enfermedad diarreica aguda (EDA) en niños mexicanos menores de cinco años. Material y métodos: Se compararon las medianas anuales de casos nuevos, defunciones y hospitalizaciones por EDA del periodo pre y posuniversalización; se calcularon reducciones absolutas y relativas, considerando significativos valores de p<0.05. Resultados: La mortalidad, hospitalizaciones y casos nuevos por EDA en menores de cinco años disminuyeron 52.6, 46 y 15.5% respectivamente, en el periodo posuniversalización. Durante la temporada de RV las reducciones en la mortalidad, hospitalizaciones y casos nuevos fueron de 66.9, 64.7 y 28.7%, respectivamente. Conclusiones: A partir de la universalización de la vacuna de RV en México, se aprecian reducciones importantes y sostenidas en la mortalidad, hospitalizaciones e incidencia por EDA, con menor impacto en esta última. El mayor impacto se observa durante la temporada de RV.

Abstract: Objective: To evaluate the impact of rotavirus (RV) vaccination after 10 years of it´s universalization on morbidity and mortality from Acute Diarrheal Disease (ADD) in mexican children under five years of age. Materials and methods: Annual median numbers for ADD new cases, hospitalizations and deaths were compared between pre and post universalization periods; absolute and relative reductions were calculated, considering p<0.05 values as significant. Results: Mortality, hospitalizations and new cases from ADD in children under five decreased 52.6, 46, and 15.5% respectively, in the posuniversalization period. During rotavirus seasons, reduction in mortality, hospitalizations and new cases was 66.9, 64.7, and 28.7% respectively. Conclusions: As of the universal introduction of RV vaccination in Mexico, significant and sustained reductions are appreciated for mortality and hospitalizations from ADD, less so for incidence. A most prominent effect is observed during the winter season.

Overview of acute diarrheal disease at the dawn of the 21st century: The case of Mexico / Panorama de la enfermedad diarreica aguda en los albores del siglo XXI: el caso de México

Abstract: Objective: To provide an overview of morbidity and mortality due to acute diarrheal disease in Mexico in order to understand its magnitude, distribution, and evolution from 2000 to 2016. Materials and methods: We carried out a longitudinal ecological study with secondary sources of information. We used data from epidemiological surveillance, health services, and vital statistics. We calculated and mapped measures of utilization of health services rates and mortality due to diarrheal diseases. Results: Diarrhea morbidity decreased by 42.1% across the period. However, emergency department attendances increased by 50.7% in the Ministry of Health. The hospitalization rate and mortality among the general population decreased by 37.6 and 39.7%, respectively, and the infant mortality rate decreased by 72.3% among children under five years of age. Chiapas and Oaxaca had the highest mortality among the states of Mexico. Conclusions: Cases of diarrhea, including rotavirus, have decreased in Mexico. However, in 2016, 3.4 per 100 000 people died due to diarrhea, which could have been avoided with health promotion.

Resumen: Objetivo: Ofrecer un panorama de la morbimortalidad por enfermedad diarreica aguda (EDA) entre 2000 y 2016 en México, para entender su magnitud, distribución y evolución. Material y métodos: Estudio ecológico longitudinal, con fuentes de información secundarias. Se analizaron datos de vigilancia epidemiológica, prestación de servicios y estadísticas vitales. Se calcularon tasas de utilización de servicios y mortalidad. Resultados: La morbilidad por EDA disminuyó 42.1% en el periodo, sin embargo, la atención por urgencias aumentó 50.7% en SS. La tasa de hospitalización descendió 37.6% y la mortalidad 39.7% en población general y 72.3% en menores de cinco años. Chiapas y Oaxaca fueron los estados con mayor tasa de mortalidad. Conclusiones: Los casos de diarrea, incluyendo los de rotavirus, han disminuido en el país. Sin embargo, en 2016 se encontró una tasa de 3.4 por 100 000 personas que mueren por EDA, lo cual podría evitarse con promoción de la salud.

Epidemiology and factors associated with diarrhoea among children under five years of age in the Engela District in the Ohangwena Region, Namibia

Background: Diarrhoea remains a public health problem and an important cause of morbidity and mortality amongst children, mainly in low- and middle-income countries. In Namibia, the national prevalence of diarrhoea was 17%; it was responsible for 5% of all deaths in children under 5 years old and is the second leading cause of death. Aim: The purpose of this study was to assess the epidemiology and factors associated with acute diarrhoea amongst children less than 5 years of age in Engela district in the Ohangwena region, Namibia. Setting: The study was conducted in Ohangwena Region in Namibia which extends east to west along the borders of the southern part of Angola. Methods: A cross-sectional study was conducted. A structured questionnaire was administered through face-to-face interviews. Descriptive statistics were used to describe the socio-demographic and epidemiological data of diarrhoea and logistic regression analysis was used to determine the factors associated with the prevalence of diarrhoea. Results: The study found a prevalence of 23.8% for diarrhoea in the 2 weeks period preceding the survey amongst children aged under 5 years. The prevalence of diarrhoea was statistically significantly associated with children (p < 0.05). The strongest predictor of the prevalence of diarrhoea was the residential area 'informal settlement', with an odds ratio of 36.42. This implies that children living in the informal settlement are 36.42 times at risk of contracting diarrhoea as compared to those living in other residential areas. Conclusion: epidemiology; factors; diarrhoea; under-5 years children; Engela district; Ohangwena region; Namibia

Enteropathogens in under-five children with diarrhea in health facilities of Debre Berhan Town, North Shoa, Ethiopia

BACKGROUND: Diarrheal disease is a major cause of mortality and morbidity for under-five children in Ethiopia. The purpose of this study was to investigate the behavioral and socioeconomic risk factors, etiology, and drug susceptibility of bacteria isolated from under-five children with acute diarrhea who were treated at Debre Berhan Referral Hospital or Health Center in Ethiopia. METHODS: A health facility based cross-sectional study design was used to investigate enteropathogens from 163 under-five children with acute diarrhea. After obtaining written consent from parents or guardians, data were collected using a standardized questionnaire. Freshly passed stool samples were collected for microbiological tests for bacteria and parasites. The chi-square test was used for assessing the relationships of variables. RESULTS: Enteropathogens were detected among 55.8% (91/163) participants. There was a 46%(75/163) bacterial culture positivity rate and a 9.8%(16/163) prevalence of parasites. The isolated enteropathogens were Escherchia coli, Klebsiella specie, Proteus species, Salmonella species, Shigella species, Enterobacter species, Giardia lamblia, Enteameba histolytica, Ascaris lumbricoides, Trichuris trichiura and Hymnoleps nana. Level of antimicrobial resistance of bacterial isolates ranged from 0 to 87.2%. Poor hand washing and poor cleaning of feeding utensils showed significant association with the presence of enteropathogens. CONCLUSION: Bacterial enteropathogens with drug resistance were observed in this study. Continuous health education and promotion about diarrheal disease for mothers/caretakers and regular surveillance of entropathogenes are recommended to reduce under-five mortality

Clinico-demographic factors associated with diarrhoeal disease outcome in under-five children: A Nigerian tertiary hospital experience

Objectives: To determine the proportion of under-5 children presenting with diarrhoeal disease, and the clinico demographic variables associated with the outcome at the emergency paediatric ward (CHER) of the Nnamdi Azikiwe University Teaching Hospital, Nnewi, South- East Nigeria.Methods: Clinical and demographic details of patients with diarrhoeal disease as obtained from the Paediatrics emergency ward log book over an 18month period were analyzed using SPSS and Microsoft excel software packages. The clinical variables (non-parametric) were tested for degree of association with mortality using Spearman's rank correlation. Chi square and Fischer exact test were used to determine presence of significant differences between certain variables. A p value <0.05 was deemed significant. Results: One thousand, one hundred and sixty three out of 1,513 children admitted within the period were aged below 5 years. Acute diarrheal disease accounted for 32% and 38% respectively of morbidity and mortality in these under-five children, with a case fatality rate of 18.3%. The mean age at presentation was 11.96 months with a male to female ratio of 1.4:1. Presentation with fast breathing (Odds Ratio {OR} 2.6), convulsion (OR 2.5), loss of consciousness (OR 4.3), increased severity of dehydration, presence of one or more comorbidities (OR 4.68) and a co-diagnosis of sepsis (OR 3.23) significantly affected the outcome. (p< 0.05 in all these). Educational status of the mothers also significantly affected the outcome. (F=9.08, p=0.023)Conclusion: Intensified effort should be made to sensitize the public about dangers of inappropriate therapy and late hospital presentation of children with diarrhoeal disease. These will reduce mortality-heralding complications

The effectiveness of a rotavirus vaccine in preventing hospitalizations and deaths presumably due to acute infectious diarrhea in Brazilian children: a quasi-experimental study

INTRODUCTION: Rotavirus is the main etiologic agent of acute infectious diarrhea in children worldwide. Considering that a rotavirus vaccine (G1P8, strain RIX4414) was added to the Brazilian vaccination schedule in 2006, we aimed to study its effectiveness and safety regarding intestinal intussusception. METHODS: A quasi-experimental trial was performed in which the primary outcome was the number of hospitalizations that were presumably due to acute infectious diarrhea per 100,000 children at risk (0-4 years old). The secondary outcomes included mortality due to acute infectious diarrhea and the intestinal intussusception rates in children in the same age range. We analyzed three scenarios: Health Division XIII of the State of São Paulo (DRS XIII) from 2002 to 2008, the State of São Paulo, and Brazil from 2002 to 2012. RESULTS: The averages of the hospitalization rates for 100,000 children in the pre- and post-vaccination periods were 1,413 and 959, respectively, for DRS XIII (RR=0.67), 312 and 249, respectively, for the State of São Paulo (RR=0.79), and 718 and 576, respectively, for Brazil (RR=0.8). The mortality rate per 100,000 children in the pre- and post-vaccination periods was 2.0 and 1.3, respectively, for DRS XIII (RR=0.66), 5.5 and 2.5, respectively, for the State of São Paulo (RR=0.47), and 15.0 and 8.0, respectively, for Brazil (RR=0.53). The average annual rates of intussusception for 100,000 children in DRS XIII were 28.0 and 22.0 (RR=0.77) in the pre- and post-vaccination periods, respectively. CONCLUSIONS: A monovalent rotavirus vaccine was demonstrated to be effective in preventing the hospitalizations and deaths of children that were presumably due to acute infectious diarrhea, without increasing the risk of intestinal intussusception. .

Perceptions regarding oral rehydration solutions for the management of diarrhea in Guatemalan children: implications for diarrheal management in the Americas / Ideas con respecto a las soluciones de rehidratación oral en el tratamiento de la diarrea de los niños guatemaltecos: repercusiones sobre el tratamiento de la diarrea en las Américas

OBJECTIVE: To describe knowledge and perceptions regarding the use of oral rehydration solution (ORS) for the management of diarrheal diseases among formal and informal health care providers and community caregivers in the Guatemalan department of Santa Rosa, and to recommend strategies to increase ORS use for management of diarrhea in children. METHODS: From July to September 2008, in-depth, semi-structured interviews were conducted with formal health care providers; open-ended interviews were conducted with informal health care providers; and focus group discussions and pile sorting were carried out with community caregivers. RESULT: The study participants attributed episodes of diarrhea in children to culturally recognized or folk ailments (empacho, cuajo, and varillas) that are primarily treated by traditional healers. There were knowledge deficits about 1) dehydration as a manifestation of diarrhea, and 2) management of dehydration, including the use of ORS and the need to continue feedings during diarrheal episodes. Caregivers perceived bottled/ready-made ORS products and the more expensive over-the-counter antidiarrheal medications as superior to ORS packets in the treatment of diarrhea. CONCLUSIONS: In Guatemala, folk etiologies of disease differ from those of the biomedical establishment and influence the decisions made by caregivers when treating ill children, including those related to the use of ORS. Public health campaigns addressing the treatment and management of diarrheal diseases in Santa Rosa should recognize the ailments known as empacho, cuajo, and varillas and target them for ORS use by community caregivers as well as health care providers in both the formal and informal health sectors.

OBJETIVO: Describir los conocimientos y las ideas que tienen las personas que prestan atención de salud en el sector convencional, el sector no convencional y los cuidadores de la comunidad con respecto al uso de las soluciones de rehidratación oral en el tratamiento de las enfermedades diarreicas, en el departamento guatemalteco de Santa Rosa y recomendar estrategias encaminadas a aumentar la utilización de estas soluciones en el tratamiento de la diarrea en los niños. MÉTODOS: De julio a septiembre del 2008 se llevaron a cabo entrevistas exhaustivas semiestructuradas a los profesionales de salud y entrevistas con preguntas abiertas a los proveedores no convencionales de atención sanitaria y se organizaron debates en grupos de opinión y ejercicios de ordenamiento de tarjetas con los cuidadores de la comunidad. RESULTADOS: Los participantes en el estudio atribuyeron la causa de los episodios de diarrea en los niños a dolencias culturalmente aceptadas o populares (empacho, cuajo y varillas), que tratan principalmente los curanderos. Se observaron deficiencias en los conocimientos acerca de 1) la deshidratación como una manifestación de la diarrea y 2) el tratamiento de la deshidratación, incluido el uso de las soluciones de rehidratación oral y la necesidad de continuar la alimentación durante los episodios diarreicos. Los cuidadores consideraron las soluciones de rehidratación embotelladas o preparadas y los medicamentos antidiarreicos de venta libre, que son más costosos, como mejores opciones para el tratamiento de la diarrea que las soluciones de rehidratación oral. CONCLUSIONES: En Guatemala, el concepto popular y el de las instituciones biomédicas sobre la causa de las enfermedades es diferente e influye sobre las decisiones que toman los cuidadores al tratar a los niños enfermos, por ejemplo, las relacionadas con el uso de soluciones de rehidratación oral. Las campañas de salud pública que abordan el tratamiento y el manejo de las enfermedades diarreicas en Santa Rosa deben incorporar las dolencias conocidas como empacho, cuajo y varillas y fomentar el uso de las soluciones de rehidratación oral en estos casos, por parte de los cuidadores de la comunidad, los profesionales de salud del sector convencional y los proveedores de atención del sector no convencional.

Tendência temporal da mortalidade geral e morbidade hospitalar por doença diarreica em crianças brasileiras menores de cinco anos no período de 2000 a 2010 / Temporal trends of overall mortality and hospital morbidity due to diarrheal disease in Brazilian children younger than 5 years from 2000 to 2010

OBJETIVO: Conhecer as tendências temporais dos indicadores de mortalidade geral e morbidade hospitalar por doença diarreica em crianças menores de um ano e de um a quatro anos, conforme as regiões brasileiras, entre 2000 e 2010. MÉTODO: Estudo ecológico de séries temporais. Os dados sobre Autorização de Internação Hospitalar, média de permanência e valor médio dessa autorização foram obtidos do Sistema de Informações Hospitalares; o número de óbitos infantis foi adquirido no Sistema de Informações sobre Mortalidade; as informações sobre os nascidos vivos e a população geral foram obtidas do Sistema de Informações sobre Nascidos Vivos e dos Censos Demográficos, respectivamente. Dados disponíveis no endereço eletrônico do Departamento de Informática do Sistema Único de Saúde/Ministério da Saúde. RESULTADOS: A mortalidade por diarreia no Brasil evidenciou tendência de decréscimo desacelerado em ambas as faixas etárias. Quanto à hospitalização, houve tendência decrescente discreta nos menores de um ano e ascendência insignificante entre 1-4 anos, entretanto, com menor permanência e valor médio de internamento, independentemente da idade e da região. Registraram-se no Norte e Nordeste os maiores coeficientes de mortalidade e maior porcentagem de internação nos menores de um ano. O Centro-Oeste apresentou maior redução média anual do tempo de permanência hospitalar. CONCLUSÃO: Atualmente, os indicadores de mortalidade geral e morbidade hospitalar por diarreia em crianças brasileiras encontram-se, de forma geral, mais baixos, porém lentamente decrescentes.

OBJECTIVE: To verify the temporal trends of the indicators of overall mortality and hospital morbidity due to diarrheal disease in children younger than 1 year and between 1 and 4 years, according to the region of Brazil, between 2000 and 2010. METHOD: This was an ecological study of temporal series. Data on hospital admission authorization, mean length of stay, and mean value of the authorization were obtained from the Hospital Information System. The number of infant deaths was obtained from the Mortality Information System; information on live births and the general population were obtained from the Information System on Live Births and Demographic Censuses, respectively. These data were available at the website of the informatics department of the Brazilian Unified Health System/Ministry of Health. RESULTS:Mortality due to diarrheal disease in Brazil showed a downwards trend in both age groups. Regarding hospitalization, there was a slight downwards trend in children younger than 1 year and a non-significant upwards trend between 1-4 years, with a shorter hospital stay and lower mean value of hospital stay, regardless of age and region. The North and Northeast had the highest mortality rates and the highest percentage of hospitalizations in children younger than 1 year. The Midwest had the highest mean annual reduction in hospital stay. CONCLUSION: Currently, the indicators of overall mortality and hospital morbidity due to diarrhea in Brazilian children are generally lower, but decreasing slowly.

Impacto do Programa Água para Todos (PAT) sobre a morbi-mortalidade por diarreia em crianças do Estado da Bahia, Brasil / Impact of the Water for All Program (PAT) on childhood morbidity and mortality from diarrhea in the Bahia State, Brazil / Impacto del Programa Agua para Todos (PAT) sobre la morbimortalidad por diarrea en niños del Estado de Bahía, Brasil

O objetivo do presente estudo foi avaliar o impacto do Programa Água para Todos (PAT), implantado no Estado da Bahia, Brasil, por ampliar a cobertura do saneamento básico em áreas de maior vulnerabilidade. Foram selecionados 224 municípios com informações vitais adequadas. Foi utilizado um desenho de estudo antes-e-depois controlado, efetuando uma análise de regressão multivariada para dados em painel com resposta binomial negativa a efeitos fixos do ano 2005 até 2008. A cobertura do PAT, como variável contínua, esteve associada negativamente (p < 0,01) com a taxa de mortalidade em menores de cinco anos. Os municípios com uma cobertura ≥ 10% tiveram uma redução de 39% (p < 0,05) na mortalidade por diarreia, de 14% (p < 0,01) na taxa de mortalidade em menores de cinco anos e de 6% (p < 0,05) nas internações hospitalares, em comparação com municípios sem cobertura ou com cobertura menor, ajustando-se pelas covariáveis. Não teve efeito na mortalidade por causas externas, utilizada como controle. Programas de saneamento básico, focalizados em áreas de maior vulnerabilidade, podem ter um grande impacto na redução das desigualdades em saúde.

This study aimed to evaluate the impact of the Water for All Program (PAT), launched in Bahia State, Brazil, with the objective of expanding coverage of the water supply and sanitation in areas with high vulnerability to waterborne diseases. A total of 224 municipalities (counties) with adequate vital statistics were selected. A controlled before-and-after study design was used, performing analyses with multivariate negative binomial regression with fixed effects, from 2005 to 2008. PAT coverage - as a continuous variable - was negatively associated (p < 0.01) with the under-five mortality rate. Municipalities with coverage ≥ 10% showed a reduction of 39% (p < 0.05) in mortality from diarrhea, under-five mortality of 14% (p < 0.01), and hospitalizations from diarrhea of 6% (p < 0.05) when compared to municipalities without PAT or with lower coverage, having adjusted for confounding. No effects were found on external causes of mortality, used as a control. When focused on highly vulnerable areas, water and sanitation programs can have an important impact in reducing health inequalities in the population.

El objetivo del presente estudio fue evaluar el impacto del Programa Agua para Todos (PAT), implantado en el Estado de Bahía, Brasil, para ampliar la cobertura del saneamiento básico en áreas de mayor vulnerabilidad. Fueron seleccionados 224 municipios con información vital adecuada. Se utilizó un diseño de estudio antes-después controlado, efectuando un análisis de regresión multivariada para los datos en panel con respuesta binomial negativa, a efectos fijos del año 2005 hasta el 2008. La cobertura del PAT, como variable continua, estuvo asociada negativamente (p < 0,01) con la tasa de mortalidad en menores de cinco años. Los municipios con una cobertura ≥ 10% contaron con una reducción de un 39% (p < 0,05) en la mortalidad por diarrea, de un 14% (p < 0,01) en la tasa de mortalidad en menores de cinco años y de un 6% (p < 0,05) en los internamientos hospitalarios, en comparación con municipios sin cobertura o con cobertura menor, ajustándose por las covariables. No tuvo efecto en la mortalidad por causas externas, utilizada como control. Programas de saneamiento básico, centrados en áreas de mayor vulnerabilidad, pueden tener un gran impacto en la reducción de las desigualdades en salud.

Frequency of Shigella flexneri serotypes isolated in the state of Pará, Brazil (1979-2009) / Frequência de sorotipos de Shigella flexneri isoladas no estado do Pará, Brasil (1979-2009)

O gênero Shigella tem sido uma das causas mais comuns de diarréia em países pouco desenvolvidos, sendo responsável pela mortalidade e / ou morbidade em população de alto risco, como crianças menores de cinco anos e idosos. Este estudo, realizado no Instituto Evandro Chagas (IEC) , Estadodo Pará, Brasil, no período de 1979 a 2009, teve como objetivo avaliar a frequência de espécies e sorotipos de 122 isolados de Shigella spp. provenientes de pacientes com diarréia aguda. Os isolados bacterianos foram identificados por meios de culturas seletivos e indicadores e testes bioquímicos. Todos os isolados foram identificados quanto ao sorogrupo e sorotipo por meio da soroaglutinaçãoem lâmina. Os sorogrupos mais frequentemente encontrados foram S. flexneri (66,4por cento) e S. sonnei(32,8por cento). O sorotipo de S. flexneri mais frequente foi o 2a (54,3por cento) seguido de 1b (17,2por cento). A maioria dos pacientes tinham idade entre 0 a 5 anos (44,6por cento), dos quais 38,2por cento apresentaram S. flexneri e 47,5por cento S. sonnei. Pacientes com idade superior a 18 anos representaram 39,2por cento das infecções, sendo 37,0por cento casos de S. flexneri, 32,5por cento de S. sonnei e um isolado de S. boydii. Esses resultados reforçam a necessidade de uma vigilância epidemiológica contínua no Estado do Pará.

Análisis de costo efectividad de la vitamina A en niños menores de 5 años en Colombia / Cost-effectiveness analysis (CEA) regarding vitamin A in children aged less than 5 years-old in Colombia

Objetivo evaluar la costo-efectividad relativa del uso de vitamina a en los niños menores de 5 años en la disminución de eventos de diarrea, malaria y la mortalidad, bajo la perspectiva del sistema de salud colombiano (SGSSS). Materiales y Métodos se construyó unárbol de decisión con muertes evitadas como desenlace. Las probabilidades se extrajeron de la literatura y los costos de fuentes oficiales. El umbral de costo-efectividad fue tres veces el producto interno bruto (PIB) per cápita colombiano de 2012. Se realizaron análisis de sensibilidad determinísticos, probabilísticos y curva de aceptabilidad. Resultados En una cohorte de cien mil niños, la administración de vitamina a, frente no hacerlo, representaría un ahorro en costos de atención médica de $ 340.306.917, debido a que reduce el número de eventos de diarrea (4.268) y de malaria (76), así como los casos en los que se requiere hospitalización. En todos los análisis de sensibilidad se obtuvo un ahorro para el sistema. Conclusión Dentro del sistema de salud colombiano, la suplementación con vitamina a para niños menores de 5 años, comparado con no hacerlo, es la estrategia menos costosa y más efectiva (dominante).

Objective Evaluating the relative cost-effectiveness of using vitamin A in children aged less than 5-years-old regarding the reduction of events involving diarrhoea, malaria and mortality from the Colombian health-related social security system (CHSSS). Materials and Methods A decision tree was constructed, using deaths averted as outcome. Probabilities were taken from the pertinent literature and costs from official sources. The cost-effectiveness threshold was three times greater than the per capita Colombian gross domestic product (GDP) in 2012. Probabilistic and deterministic sensitivity analyses were made and cost effectiveness acceptability curves were drawn. Results Providing a cohort of 100,000 children with vitamin A (as opposed to not doing so) would represent a saving regarding medical attention costs of $ 340,306,917 due to the number of events involving diarrhea (4,268) and malaria (76), having become reduced, as well as cases requiring hospitalization. A saving for the CHSSS was consistently obtained in sensitivity analysis. Conclusion Providing vitamin supplements for children aged less than 5 years-old would seem to be the least costly and most effective (dominant) strategy for the CHSSS, i.e. compared to not doing so).

Reduction in morbidity and mortality from childhood diarrhoeal disease after species A rotavirus vaccine introduction in Latin America : a review

Countries in Latin America were among the first to implement routine vaccination against species A rotavirus (RVA). We evaluate data from Latin America on reductions in gastroenteritis and RVA disease burden following the introduction of RVA vaccine. Published literature was reviewed to identify case-control studies of vaccine effectiveness and population-based studies examining longitudinal trends of diarrhoeal disease reduction after RVA vaccine introduction in Latin American countries. RVA vaccine effectiveness and impact on gastroenteritis mortality and hospitalization rates and RVA hospitalization rates are described. Among middle-income Latin American countries with published data (Mexico, Brazil, El Salvador and Panama), RVA vaccine contributed to a gastroenteritis-associated mortality reduction of 22-41 percent, a gastroenteritis-associated hospitalization reduction of 17-51 percent and a RVA hospitalization reduction of 59-81 percent among children younger than five years of age. In Brazil and El Salvador, case-control studies demonstrated that a full RVA vaccination schedule was 76-85 percent effective against RVA hospitalization; a lower effectiveness of 46 percent was seen in Nicaragua, the only low-income country with available data. A growing body of literature offers convincing evidence of "real world" vaccine program successes in Latin American settings, which may be expanded as more countries in the region include RVA vaccine in their immunization programs.

Clostridium Difficile-Associated Diarrhea: A Review.

Clostridium difficile–associated diarrhea (CDAD) has become a major public health problem. The offending pathogen is acquired by the fecal-oral route from an environmental source or by contact with an infected person or health care worker who serves as a vector. Alteration of the intestinal microflora, frequently by antibiotics, generates a favorable environment results in the proliferation of C. difficile. The pathogen is not invasive but produces two toxins, A and B, that lead to severe inflammation of the colonic mucosa manifested as profound diarrhea, fever, abdominal pain, and leukocytosis. A new hypervirulent strain of C. difficile has become prevalent in the United States, Canada, and the United Kingdom. Identified by pulsed-field gel electrophoresis (PFGE), this strain is called North America PFGE type 1, abbreviated as NAP-1, and characteristically generates large amounts of toxins A and B, in addition to a binary toxin, and is associated with higher morbidity and failure of antibiotic therapy. Mild cases of CDAD may respond to withdrawal of antibiotic therapy, however the majority of patients require C. difficile-specific antimicrobial therapy. The US FDA has approved oral vancomycin for treatment of CDAD, but reluctance to use this antibiotic due to the fear of developing vancomycinresistant organisms in the hospital setting has made metronidazole the recommended first-line therapy for mild to moderate disease. Some newer studies show a high rate of failure, due to infection by NAP-1 or to the presence, in hospitals, of geriatric patients with more concurrent illnesses who may also have been treated with many broad-spectrum antibiotics. The recurrence rate after initial successful treatment can be as high as 20-30%, depending on the initial treatment. A more C. difficile-targeted non-absorbable bacterial RNA polymerase inhibitor, fidaxomicin (also known as OPT-80 and PAR-101), has recently been approved in the US with initial efficacy similar to vancomycin and a lower recurrence rate. Some additional agents that have shown efficacy in humans are nitazoxanide, bacitracin, teicoplanin, and fusidic acid. Rifaximin, polymers that bind C. difficile toxin, monoclonal antibodies to toxins, and preventive measures such as toxoid vaccines are under investigation. Interventions for treatment of recurrences include repeated vancomycin or fidaxomicin courses, probiotics, rifaximin, intravenous immunoglobulin and fecal transplants. Measures for preventing the spread of the pathogen, appropriate diagnostic testing, and treatment may avert morbidity and mortality due to CDAD.

Cost-effectiveness of improving pediatric hospital care in Nicaragua / Costo-eficacia de la mejora de la atención hospitalaria pediátrica en Nicaragua

OBJECTIVE: To determine the costs and cost-effectiveness of an intervention to improve quality of care for children with diarrhea or pneumonia in 14 hospitals in Nicaragua, based on expenditure data and impact measures. METHODS: Hospital length of stay (LOS) and deaths were abstracted from a random sample of 1294 clinical records completed at seven of the 14 participating hospitals before the intervention (2003) and 1505 records completed after two years of intervention implementation ("post-intervention"; 2006). Disability-adjusted life years (DALYs) were derived from outcome data. Hospitalization costs were calculated based on hospital and Ministry of Health records and private sector data. Intervention costs came from project accounting records. Decision-tree analysis was used to calculate incremental cost-effectiveness. RESULTS: Average LOS decreased from 3.87 and 4.23 days pre-intervention to 3.55 and 3.94 days post-intervention for diarrhea (P = 0.078) and pneumonia (P = 0.055), respectively. Case fatalities decreased from 45/10 000 and 34/10 000 pre-intervention to 30/10 000 and 27/10 000 post-intervention for diarrhea (P = 0.062) and pneumonia (P = 0.37), respectively. Average total hospitalization and antibiotic costs for both diagnoses were US$ 451 (95 percent credibility interval [CI]: US$ 419-US$ 482) pre-intervention and US$ 437 (95 percent CI: US$ 402-US$ 464) post-intervention. The intervention was cost-saving in terms of DALYs (95 percent CI: -US$ 522- US$ 32 per DALY averted) and cost US$ 21 per hospital day averted (95 percent CI: -US$ 45- US$ 204). CONCLUSIONS: After two years of intervention implementation, LOS and deaths for diarrhea decreased, along with LOS for pneumonia, with no increase in hospitalization costs. If these changes were entirely attributable to the intervention, it would be cost-saving.

OBJETIVO: Determinar el costo y la eficacia en función del costo de una intervención para mejorar la calidad de la atención de ni±os con diarrea o neumonía en 14 hospitales de Nicaragua, sobre la base de la información sobre gastos y la medición de las repercusiones. MÉTODOS: Se compilaron datos sobre la duración de la hospitalización y la mortalidad de una muestra aleatoria de 1 294 historias clínicas compiladas en 7 de los 14 hospitales participantes antes de la intervención (2003) y 1 505 historias clínicas compiladas después de dos a±os de ejecución de la intervención ("postintervención", 2006). Los a±os de vida ajustados en función de la discapacidad (AVAD) se obtuvieron de los resultados asistenciales. Se calcularon los costos de hospitalización según los registros de los hospitales y del Ministerio de Salud, y datos del sector privado. Los costos de la intervención se obtuvieron de los registros contables del proyecto. Para calcular la relación costo-eficacia incremental se usó un anßlisis de ßrbol de decisiones. RESULTADOS: La duración promedio de la hospitalización disminuyó de 3,87 y 4,23 días antes de la intervención a 3,55 y 3,94 días después de la intervención para la diarrea (P = 0,078) y la neumonía (P = 0,055), respectivamente. La letalidad disminuyó de 45/10 000 y 34/10 000 antes de la intervención a 30/10 000 y 27/10 000 después de la intervención para la diarrea (P = 0,062) y la neumonía (P = 0,37), respectivamente. Los costos totales promedio de la hospitalización y de los antibióticos para ambos diagnósticos fueron de US$ 451 (intervalo de confianza [IC] de 95 por ciento: US$ 419 a US$ 482) antes de la intervención y US$ 437 (IC 95 por ciento: US$ 402-US$ 464) después. La intervención representó un ahorro de costos en cuanto a los AVAD (IC 95 por ciento: -US$ 522 a US$ 32 por cada AVAD evitado) y costó US$ 21 por cada día de hospitalización evitado (IC 95 por ciento: -US$ 45 a US$2 04). CONCLUSIONES: Después de dos...

Hospitalizações por diarreia infecciosa em crianças, condições de vida e atenção básica à saúde no município de Itaboraí, RJ / Hospitalizations for infectious diarrhea in children, social conditions and primary health care in Itaboraí, RJ

No Brasil, a importante diminuição do número de óbitos por diarreia infecciosa nas últimas décadas esteve mais associada à aplicação de técnicas de controle como medicamentos e hidratação oral, do que por transformações nas condições de vida,resultando em importante redução da taxa de mortalidade por diarreia em crianças assim como na diminuição de sua sensibilidade como indicador de desigualdades sociais em saúde. Neste cenário, como o potencial de produção da diarreia tem se mantido, a análise das internações por esse agravo surge como um marcador para compreensão da situação de saúde da população infantil. Objetivo: Analisar a distribuição espaço temporal das internações hospitalares por diarreia em crianças menores de cinco anos de idade, relacionando com as condições de vida e Atenção Básica à saúde do município de Itaboraí. Método: Estudo de situação de saúde tendo como unidade de análise o bairro de residência. Foi estabelecido o indicador denominado Razão de Internações por Diarreia em menores 5 anos (RID), que consistiu na divisão das internações por diarreia pelos nascidos vivos. A partir dos dados do IBGE (2000), foi construído um Indicador de Condições de vida (ICV), através do cálculo de 2 índices: 1) Estrutura Social, composto por variáveis de renda e escolaridade, e 2) Condições Sanitárias Locais, composto por variáveis de abastecimento de água, esgoto e coleta de lixo. Para analisar a relação daRID e assistência a saúde foram utilizados indicadores do SINASC relacionados a atenção ao parto e pré-natal. As fontes de informação utilizadas foram SIH-SUS e SINASC, para o período 2006-2009. A associação entre as variáveis foi testada pelo coeficiente de Pearson...

Persistent diarrhea: Risk factors and outcome.

Objective. To identify risk factors associated with Persistent diarrhea (PD) and deaths due to PD. Methods. This prospective case control study included 60 children with PD (cases) and 60 children (controls) with acute diarrhoea (AD). Detailed history, examination and appropriate investigations were done for all children. Crude Odds ratio was calculated for each risk factor by univariate analysis and adjusted odds ratio was calculated by multivariate logistic regression. Results. Prior antibiotic use, steroid use, anemia, vitamin A deficiency, malnutrition, LRI, UTI, oral candidiasis, and hyponatremia, were statistically significant risk factors by univariate analysis. Prior antibiotic use, vitamin A deficiency, malnutrition and LRI were independently associated with PD by multivariate logistic regression analysis. The risk factors for mortality were stool frequency more than 10 times per day, severe malnutrition, oral candidiasis, hypoalbuminemia and HIV positivity. Conclusions. The presence of these risk factors should alert the clinician to take appropriate measures, to decrease the mortality.

Perfil de la diarrea aguda en niños hospitalizados de Santa Bárbara / Profile of acute diarrhea in hospitalized children from Santa Barbara

Introducción: la diarrea aguda ha sido una de las principales causas de morbilidad y mortalidad en la infancia. Estudiar el comportamiento clínicos y epidemiológico de la diarrea en menores de cinco años ingresados en el Servicio de Pediatría del Hospital Santa Bárbara Integrado de Honduras durante los primeros cinco meses del año 2008. Pacientes y métodos: El universo estuvo constituido por 200 niños desde cero hasta cinco años que ingresaron en el servicio con el diagnóstico de Enfermedad Diarreica Aguda en el transcurso de una epidemia. Se utilizó un cuestionario que fue aplicado a las madres y además se utilizó información de los expedientes clínicos de los pacientes. Resultados: La afectación fue en el amplio grupo de 1 hasta 4 años, con predominio en el sexo masculino y la mayoría de los pacientes estaban eutróficos. El bajo percápita familiar, el hacinamiento y la baja escolaridad materna fueron los principales antecedentes de riesgo detectados. La deshidratación fue la principal complicación y no ocurrieron defunciones. Conclusión: Los hallazgos clínicos y epidemiológicos encontrados en este grupo indican que las condiciones socioeconómicas se asocian a enfermedad diarreica...

Mortalidad por enfermedad diarreica en menores, antes y después de la introducción de la vacuna contra el rotavirus / Analysis of the mortality due to diarrhea in younger children, before and after the introduction of rotavirus vaccine

Objetivo. Analizar la mortalidad por diarrea en menores de cinco años en México, antes y después de la vacunación contra el rotavirus. Material y métodos. Se compararon defunciones y mortalidad por diarrea mediante diferencias porcentuales anuales por grupo etario, antes (2000-2005) y después (2006-2007) de la vacunación. Resultados. Entre 2000 y 2007 la mortalidad por diarrea disminuyó 42%. En los estados con vacunación, la mortalidad se redujo 15.8 y 27.7% en menores de uno y de uno a cuatro años, respectivamente, en el periodo de 2006 a 2007. Discusión. La reducción observada en la mortalidad por diarrea en menores de cinco años después de 2005 puede atribuirse en parte a la vacunación contra el rotavirus.

Objective. To analyze the mortality due to acute diarrhea in children younger than five years old, before and after the introduction of rotavirus vaccine in Mexico. Material and Methods. Number of deaths and mortality rates due to acute diarrhea were compared by children’s age and states’ vaccine status using annual percentage differences before (2000-2005) and after (2006-2007) the introduction of the HRV. Results. From 2000-2007, deaths due to acute diarrhea in children under five years of age dropped 42%. In those states that received the HRV early in 2006, diarrhea mortality decreased between 2006-2007 15.8% in children younger than one year old and 22.7% in children 1-4 years old. Discussion. The observed reduction in mortality due to acute diarrhea in children under five years of age after 2005 can be, in part, attributed to the HRV.

Analysis of mortality from diarrheic diseases in under-five children in Brazilian cities with more than 150,000 inhabitants / Mortalidade por doenças diarréicas em menores de cinco anos, em municípios brasileiros com mais de 150 mil habitantes

This study analyzes mortality from infectious diarrheic diseases in children under 5 years of age in Brazilian municipalities with more than 150,000 inhabitants, excluding State capitals. The annual mortality rates by municipality from 1990 to 2000 were analyzed using a multilevel model, with years as first level units nested in municipalities as second level units. The dependent variable was the yearly mortality rate by municipality, on the log scale. Polynomial time trends and indicator variables to account for differences in geographic regions were used in the modeling. Time trends were centered on 1995, so they could be modeled differently before and after 1995. From 1990 to 1995 there was a sharp decrease in mortality rates by diarrheic diseases in most Brazilian municipalities, while from 1995 to 2000 the decrease was more heterogeneous. In 1995 the North and Northeast of Brazil had higher mortality rates than the Southeast, and the differences were statistically significant. Most importantly, the study concludes that there was an important difference in the pattern of mortality rate decreases over time, comparing the country's five geographic regions.

Neste estudo, analisou-se a mortalidade por doenças diarréicas de origem infecciosa em menores de cinco anos, em municípios brasileiros com mais de 150 mil habitantes, exceto capitais. Realizou-se uma análise longitudinal, utilizando um modelo multinível para as taxas anuais de mortalidade de 1990 a 2000, estando as medidas no tempo no primeiro nível e municípios no segundo. Considerou-se como variável dependente o logaritmo natural da taxa de mortalidade e como variáveis independentes os termos relativos à tendência temporal e às regiões do país. Tomou-se o ano de 1995 como linha de base da série histórica, modelando-se as séries à sua esquerda e à sua direita. De 1990 a 1995, houve queda importante nas taxas, ao passo que de 1995 a 2000 as taxas caíram de forma mais heterogênea. No modelo de intercepto aleatório e tendência linear fixa verifica-se que as regiões Norte e Nordeste têm taxas, previstas pelo modelo, mais altas (em 1995) do que o Sudeste. Entretanto, analisando todo o período, detectou-se uma diferença estatisticamente significativa, não só nos interceptos, mas também no padrão linear de queda das taxas, segundo as regiões do país.