ABSTRACT
An eight-year old boy from Posadas (27º 23'S, 55º 54'W) was diagnosed with visceral leishmaniasis (VL) during 2006. Lutzomyia longipalpis was discovered in the backyard of his house, while the spread of canine visceral leishmaniasis was confirmed in Posadas. This is the southernmost report of a VL transmission focus and the first in Argentina.
Subject(s)
Animals , Child , Dogs , Humans , Male , Dog Diseases/epidemiology , Insect Vectors , Leishmaniasis, Visceral/epidemiology , Psychodidae , Argentina/epidemiology , Dog Diseases/diagnosis , Dog Diseases/parasitology , Leishmaniasis, Visceral/diagnosis , Leishmaniasis, Visceral/veterinaryABSTRACT
En el barrio El Pato,municipio de Berazategui, provincia de Buenos Aires, se realizó una investigación-acción preventiva contra la mariposa negra Hilesia nigricans, luego del aumento de consultas espontâneas por dematitis inespecífica. La incidência, durante el verano del año 2001, se estimo mediante una encuesta semiestructurada. En noviembre de 2002, se roció con Bacillus thuringiensis el arbolado público, evaluándose su efecto insecticida en campo y en laboratorio. El impacto se estimó mediante una encuesta pos-intervención en marzo de 2002. La distribución por edad, signos clínicos, persistência (11 días) y estacionalidad de los casos ( enero-febrero) fue consistente con dermatitis por H . nigricans. La mortalidad de larvas a las 96 horas del rociado fue del 100%. Las tasas de incidencia de dermatitis antes y después de la intervención fueron de 10.3% y 1.8% respectivamente. La acción coordinada de agentes nacionales, provinciales y locales permitió identificar el problema, diseñar investigaciones operacionales, y aplicar una estratégia de control preventivo, transferible por sus mismos efectores a la comunidad.
Subject(s)
Child, Preschool , Child , Adolescent , Adult , Middle Aged , Animals , Humans , Male , Female , Dermatitis, Allergic Contact/epidemiology , Insect Control , Moths , Age Factors , Argentina/epidemiology , Chi-Square Distribution , Dermatitis, Allergic Contact/prevention & control , Incidence , Moths/physiology , Sex Factors , Sparganum/physiologyABSTRACT
An improved device for detecting peridomestic Triatoma infestans consisting of one-liter recycled Tetra Brik milk boxes with a central structure was tested using a matched-pair study design in two rural areas in Argentina. In Olta (La Rioja), the boxes were installed beneath the thatched roofs and on the vertical wooden posts of each peridomestic structure. After a 5-month exposure, at least one of the recovered boxes detected 88 percent of the 24 T. infestans-positive sites, and 86 percent of the 7 negative sites by timed manual collections at baseline. In Amamá (Santiago del Estero), the boxes were paired with the best performing prototype tested before (shelter unit). After 3 months, some evidence of infestation was detected in 89 percent (boxes) and 79 percent (shelters) of 18-19 sites positive by timed collections, whereas 19 percent and 16 percent of 32 negative sites were positive, respectively. Neither device differed significantly in the qualitative or quantitative collection of every sign of infestation. The installation site did not modify significantly the boxes' sampling efficiency in both study areas. As the total cost of each box was half as expensive as each shelter unit, the boxes are thus the most cost-effective and easy-to-use tool for detecting peridomestic T. infestans currently available