IIBYT   23944
INSTITUTO DE INVESTIGACIONES BIOLOGICAS Y TECNOLOGICAS
Unidad Ejecutora - UE
artículos
Título:
Host influence on the nutritional and reproductive status of Triatoma infestans (Klug) (Hemiptera: Reduviidae) peridomiciliary populations
Autor/es:
CARDOZO MIRIAM; NATTERO JULIETA; CANAVOSO, L; LEYRIA, JIMENA; SORIA CAROLA; CROCCO LILIANA; RODRIGUEZ, CLAUDIA
Revista:
Revista de la Sociedad Entomológica Argentina
Editorial:
Sociedad Entomológica Argentina
Referencias:
Año: 2019 vol. 78 p. 1 - 11
ISSN:
1851-7471
Resumen:
ABSTRACT. Triatoma infestans is the main vector of Chagas disease in the southern cone of South America. This species is well adapted to living in rural houses and structures used for housing domestic animals (peridomestic habitats). In this study, we evaluated the relationship between the source of blood consumed by adults of T. infestans collected from differentperidomestic habitats from two localities from Cruz del Eje department (Córdoba, Argentina) and their nutritional and reproductive status. In each individual, the ratio between body weight and total body length was used as an indicator of nutritional status (NS). The presence of sperm in spermathecae and the number of chorionated oocytes in ovaries and oviducts were considered indicators of reproductive status (RS) of females. The feeding source in thepromesenteron of male and female insects was identified using anti-chicken, anti-goat, antihuman and anti-dog antisera. Chicken coops were the main peridomestic structure present in the study area as well as the peridomestic sites with the highest percentage of T. infestans.Insects collected from the different peridomestic structures showed a NS between 8 and 15 mg/mm. Of the evaluated females, 35.7% presented chorionated oocytes. Food profile analyses revealed that chicken was the main blood source. Independently of the blood source, the triatomines presented a NS between 8 and 15 mg/mm. No specimens feeding exclusively on human blood were found; nevertheless, of 31.48% of insects feeding on mixed blood sources, 59% included human blood. All T. infestans specimens that included human blood in the mixed blood source were collected from chicken coops and storerooms locatedin a 12-m area around domiciles. Human blood present in mixed blood meal of adult insects suggests that T. infestans moves from domiciles to peridomicilies and vice versa.KEYWORDS. Chagas disease vector. Female reproductive status. Host-feeding source. Nutritional status. Peridomestic habitats.