Susceptibility of Wild Populations of Biomphalaria spp. From Neotropical South America to Schistosoma mansoni and Interference of Zygocotyle lunata..

SPATZ L, ; GONZALEZ CAPPA SM, ; OSTROWSKI DE NÚÑEZ M,

JOURNAL OF PARASITOLOGY

AMER SOC PARASITOLOGISTS

Lugar: Washington, Estados Unidos; Año: 2012 vol. 98 p. 1291 - 1295

0022-3395

Populations of Biomphalaria straminea, B. peregrina, B. tenagophila, B.orbignyi, and B. oligoza from different Argentine localities were exposed to miracidia of Schistosoma mansoni EC strain, and B. tenagophila in addition to SJ2 strain. Biomphalaria straminea and B. tenagophila displayed different susceptibility and compatibility (Frandsen´s TCP Index class 0-II), while B. orbigny and B. oligoza were incompatible. While B. peregrina and B. tenagophila were found naturally infected with the amphistome Zygocotyle lunata, all 5 species could be experimentally infected with Z. lunata. After exposure to Z. lunata infections with S. mansoni were obtained in natural populations of B. straminea and B. tenagophila with the EC-strain (13.5-17.1% and 1.2 %), respectively, and in B. tenagophila with the SJ2 strain (2.6%), 60 days post-exposure [PE]), and in B. orbigny and B. oligoza (31.1% and 26.7 % 60 days PE, respectively, including single infections with S. mansoni and double infections with Z. lunata). The high susceptibility of B. orbigny and B. oligoza is noteworthy, as these 2 species are considered resistant to S. mansoni.