Seroprevalencia de anticuerpos contra dengue en niños de uno a nueve años luego de una epidemia, Aguilares, Tucumán, 2009 / Seroprevalence of Dengue Antibodies in One-to Nine-Year-Old Children after an Outbrea, Aguilares, Tucumán 2009

INTRODUCCIÓN: El brote de dengue de 2009 constituyó el primero con casos autóctonos en Tucumán. Los departamentos de Río Chico y Capital fueron los más afectados. Hubo baja notificación de niños de uno a nueve años (2,6/1.000). Este hallazgo impulsó a conocer el real impacto del brote en la población infantil. OBJETIVO: Estimar la incidencia de dengue en niños de uno a nueve años. MÉTODOS: Se realizó un estudio transversal de sero prevalencia(IgG) en julio de 2009 en Aguilares (Departamento de Río Chico),con una muestra probabilística de niños de uno a nueve años que habían residido allí en los últimos seis meses. Los criterios de exclusión fueron: hogar inhabitado, rechazo a participar o niño con enfermedad aguda. Se utilizó una prueba de neutralización por reducciónde placas. RESULTADOS: Se obtuvieron muestras de 118 niños. Hubo 18 rechazos a participar. El 24...

INTRODUCTION: The 2009 dengue outbreak became the first with autochthonous cases in Tucumán. The departments of Río Chico and Capital were the most affecte dones. There was low incidence in one- to nine-year-old children(2.6/1000). This finding led to a study to know the real impact of the outbreak on children. OBJECTIVE: To estimate dengue incidence in one- to nine-year-old children. METHODS: Across-sectional seroprevalence (IgG) study was carried out in July 2009 in Aguilares (Department of Río Chico), with aprobability sample composed by one- to nine-year-old children who had lived there in the last six months. Exclusion criteria were: uninhabited home, refusal to participate or seriously illchild. The laboratory study consisted of a plaque reduction neutralization test. RESULTS: A total of 118 samples were obtained. There were 18 refusals to participate. 24...

Phlebotominae sand flies associated with a tegumentary leishmaniasis outbreak, Tucumán Province, Argentina

The distribution of sand flies and cases of tegumentary leishmaniasis in the area surrounding JB Alberd city, and the proximities of Catamarca province were studied, after an increase of reported cases from JB Alberdi, Tucumán province, in 2003. Of 14 confirmed cases, 57 percent were females and 57 percent were less than 15 years old, suggesting peridomestic transmission. However, 86 percent of them lived close to the Marapa river forest gallery and related wooded areas. Over 1,013 sand flies were collected; Lutzomyia neivai (Pinto, 1926) was prevalent at all the sites (92.3 percent), while Lutzomyia migonei (França, 1920) (6.7 percent) and Lu. cortelezzii (Brèthes, 1923) (1 percent) were also found. The spatial distribution of Lu. neivai overlapped that of the cases, with higher abundance in microfocal hot spots close to the river in stable vegetated habitats or modified habitats with shadow and animal blood sources. The cumulative outcome of anthropic, ecological and climatic factors could have contributed to the onset of the outbreak.

Após um aumento nos casos notificados na cidade de JB Alberdi, Provincia de Tucumán, no ano de 2003, foram estudados a distribuição de flebotomíneos e casos de leishmaniose tegumentar nos arredores de JB Alberdi, e na área próxima à Província de Catamarca. De 14 casos confirmados, 57 por cento foram mulheres e 57 por cento tinham menos de 15 anos de idade, sugerindo transmissão peridomiciliar. Contudo, 86 por cento dos casos residiam perto da galeria florestal do rio Marapa e perto de ilhas de vegetacão residual. De 1.013 flebotomíneos coletados, Lutzomyia neivai (Pinto, 1926) foi a espécie dominante em todos os sítios (92,3 por cento). Também, se capturaram Lutzomyia migonei (França, 1920) (6,7 por cento) e Lutzomyia cortelezzii (Brèthes, 1923) (1 por cento). A distribuicão espacial de Lu. neivai se sobrepõe com a dos casos com alta abundância em pontos quentes microfocais próximos ao rio, em habitats estáveis com vegetação, ou habitats modificados com sombras e fonte de sangue animal. O efeito acumulativo de fatores antrópicos, ecológicos e climáticos pode ter contribuido à geração do surto epidêmico.