ABSTRACT
El objetivo del presente estudio es efectuar el análisis del impacto de la vigilancia en sus diferentes modalidades en el control de la infección por T. cruzi y la densidad vectorial (Triatoma infestans). Material y métodos: El trabajo fue desarrollado en el Departamento de Capayán, en la provincia de Catamarca, Argentina. Se seleccionaron aleatoriamente 5 comunidades rurales y 3 comunidades peri-urbanas para desarrollar el estudio. Indicadores utilizados: a) infestación domiciliaria en los meses 24, 48 y 96; y b) Infección por T.cruzi de menores de 14 años. Resultados: Se observa persistencia de triatomineos durante el periodo de seguimiento y cuando se comparan los datos del estudio de base (2007) con los obtenidos en el año 2009 y 2012 existe significancia estadística (p <0.04) entre áreas. Se capturaron 1.89 insectos/intradomicilio en áreas con vigilancia activa versus 5.21 insectos/intradomicilio en áreas donde la misma no existió. Se demuestra la existencia de infecciones recientes en niños menores de 4 años e hijos de mujeres negativas para T. cruzi en áreas sin vigilancia activa (3 niños). Conclusión: En la presente investigación se demuestra el impacto de la vigilancia activa en sus diferentes modalidades por la no existencia de casos nuevos vectoriales en el período de seguimiento. (AU)
The aim of this study is to perform the analysis of the impact of surveillance in its various forms in the control of infection by T. cruzi and vector density (Triatoma infestans). Material and Methods: The work was developed in the Department of Capayán, in the Province of Catamarca, Argentina. Eight rural communities were selected to develop the study. Indicators used: a) house infestation in 24 months, 48 and 96; b) T. cruzi infection in children under 14 years. Results: Persistence of triatomine It is observed during the monitoring period as the baseline study (2007) thus obtained in 2009 compared to 2012 there is statistical significance (p <0.04) between areas. 1.89 insect / intradomicile were captured in areas with active surveillance versus 5.21 insect/intradomicile in areas where it did not exist. The existence of recent infections in children under four years of negative women and children for T. cruzi in areas without active surveillance (3 children) is demonstrated. Conclusion: In this research, the impact of active surveillance in its various forms by Vector exists no new cases in the follow-up period shown. (AU)
Subject(s)
Humans , Child , Adolescent , Trypanosoma cruzi , Chagas Disease/epidemiology , Vector Control of Diseases , Epidemiological Monitoring , Argentina , Housing Sanitation , National Health ProgramsABSTRACT
The pathogenicity of 13 field isolates of infectious bronchitis virus (IBV) isolated from Georgia broiler farms from 1989 to 1992 was evaluated using the IBV and Escherichia coli mixed-infection model. Based on the clinical signs, mortality, and lesions, the isolates were classified as high, intermediate, and low in pathogenicity. The in vivo classification was compared with the serotype classification results obtained by reverse transcriptase-polymerase chain reaction-restriction fragment length polymorphism analysis. The high-pathogenicity group was composed of five isolates representing three serotypes: Arkansas, Georgia variant (GAV), and Massachusetts. Isolates in the intermediate- and low-pathogenicity groups were all representatives of the Connecticut serotype, except for one isolate, which belonged to the Massachusetts serotype.
