DIAGNOSIS OF NEMATODES GASTRINTESTINAL RESISTANCE TO ANTIHELMINTHIC IN GOATS AND SHEEP OF RN

Abstract

The gastrointestinal parasites control in goats and sheep flock have been accomplished through several chemical groups of anthelmintics, without considering the predominant epidemic factors of the local and the accomplishment of rational outlines of drugs alternation. The objective of present work was to evaluate the sensibility of the gastrointestinal nematodes in relationship to the anthelminthics within state of Rio Grande do Norte. Therefore, it has been used 54 goats and 54 sheep, females without pattern racial defined. The composts tested were albendazole 10% and ivermectin. For the evaluation of the resistance reduction test it was used the number of eggs per gram of feces (RCOF) and fecal culture. In sheep RCFO was: for albendazole 44,3%, 54,2% and 70,9%, for ivermectin 11,4%, 28,8% and 22,1% at the 7th, 14th and 21st day powder-treatment respectively. In goats RCOF was: for albendazole 2,9%, 9,6% and 24,1%, and for ivermectin 24,9%, 12% and 5,9% at the 7th, 14th and 21st day powder-treatment respectively. Thus, it was observed that the gender Haemonchus was prevalent in the resistant population for the anthelmintics tested in sheep as in goats, followed by Strongyloides, Trichostrongylus, and Oesophagostomum. Keywords: albendazole, ivermectin, goats, sheep.