Biomphalaria tenagophila potencial vector of Schistosoma mansoni in the Paraná River basin (Argentina and Paraguay)
Mem. Inst. Oswaldo Cruz
;
102(2): 191-195, Mar. 2007. tab, mapas
Artículo
en Inglés
| LILACS
| ID: lil-447563
ABSTRACT
Susceptibility and compatibility experiments were carried out with 700 Biomphalaria tenagophila from the Paraná River basin exposed to infection with Schistosoma mansoni. Individual infection was performed with 10 miracidia of SJ2 strain from the Paraiba valley (Brazil) originally infective to B. tenagophila. These snails were laboratory-breed progeny of B. tenagophila collected from six localities of Argentina and one from Paraguay. From Argentina Rincón de Vences (7 percent) and Posadas (11 percent) became infected with S. mansoni and the calculation of Frandsen's index (TCP/100) shows that they were Class II poorly compatible. Those snails from Goya (22 percent), Maloyas (5 percent), and Berón de Astrada (3 percent) were Class III compatible to the S. mansoni. None of the 100 snails exposed from Caá-Catí became infected (Class 0 incompatible). Tested samples from Paraguay (Encarnación) were infected (20 percent) and compatible (Class III). It was also studied the persistence of the infection in 244 snails of the first generation (F1) of those that were susceptible from three places. It was demonstrated an increment of the susceptibility in the F1 from Maloyas (chi2 = 27.22; p = 0.0001) and Posadas (chi2 = 4.24; p = 0.04). The results point out the possibility that schistosomiasis might be able to spread into the Paraná River basin where B. tenagophila exists.
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Índice:
LILACS (Américas)
Asunto principal:
Schistosoma mansoni
/
Biomphalaria
/
Vectores de Enfermedades
Límite:
Animales
País/Región como asunto:
America del Sur
/
Argentina
/
Paraguay
Idioma:
Inglés
Revista:
Mem. Inst. Oswaldo Cruz
Asunto de la revista:
Medicina Tropical
/
Parasitología
Año:
2007
Tipo del documento:
Artículo
País de afiliación:
Argentina
Institución/País de afiliación:
Universidad Nacional del Nordeste/AR
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