01710nam a2200157 a 450000100080000000500110000800800410001910000220006024501400008226004150022252008250063765000230146265000100148565300310149565300260152615308872023-12-14       2002    bl uuuu     u00u1 u    #d1 aVERÍSSIMO, C. J.  aSusceptibility to gastrointestinal parasites by genetic markers, in meat type ewes and ewelambs reared in intensive production systerm.  aIn: CONGRESSO BRASILEIRO DE PARASITOLOGIA VETERINÁRIA, 12.; SEMINÁRIO DE PARASITOSES NA CLÍNICA DE PEQUENOS ANIMAIS, 1.; SEMINÁRIO DE COCCÍDIOS E COCCIDIOSES, 1; SEMINÁRIO DE MANEJO INTEGRADO DA RESISTÊNCIA, 1.; CURSO DE GEOPROCESSAMENTO E SEU USO EM ESTUDOS EPIDEMIOLÓGICOS, 2002, Rio de Janeiro. Anais... Rio de Janeiro: UFRRJ: Colégio Brasileiro de Parasitologia Veterinária, 2002. 1 CD-ROM.c2002  aThere is a recent increase in meat sheep consumption in Brazil. Rearing sheep in tropical conditions is difficult because of the verminosis, which causes a lot of damage to the animais. The helminth control, especially Haemonchus contortuJ; is very difficult, because of the resistance that this nematode presents to the anthelmintcs. The identification and selection of animais genetically resistant will likely reduce dewormers utilization. The objective of this work was to compare the performance of four meat type sheep breeds, under an intensive management system, subjected to natural gastrointestinal parasites infections and to know the genetic variability of sheep females, classified as their resistance to nematodes levels, trying to search a relationship between resistance to nematodes and genetic markers.  aMarcador Genético  aOvino  aNematódeo gastrintestinal  aRestrição genética