Effect of anthelmintic treatment on the ponderal development of Nelore, Simmental and crossbred cattle between two breeds

Author(s)

José Henrique das Neves

• Document type: Doctoral Thesis
• Press: Botucatu. 2017-09-01.
• Institution: Universidade Estadual Paulista (Unesp). Faculdade de Medicina Veterinária e Zootecnia. Botucatu
• Defense date: 2017-08-18
• Advisor: Alessandro Francisco Talamini do Amarante; Cyntia Ludovico Martins

Abstract

Brazilian cattle breeding stands out in the world scenario, with Brazil being one of the largest meat producers. However, parasitism by gastrointestinal nematodes generates germplasm in the production of these animals, due to an action of the parasites, drug spending and animal management. The objective of this study was to evaluate factors related to the use of anthelmintics in bovines of the Nelore, Simmental and ½ Nelore x ½ Simental crossbreed, quantifying the gain in weight of naturally parasitized bovines after the administration of anthelmintic ivermectin, albendazole sulfoxide and untreated. Calves and heifers were oriented from three to five months of age on four farms. The cattle were divided into three groups: G1 - treated every 28 days with ivermectin, G2 - treated every 28 days with albendazole sulfoxide and G3 - control group, without treatment. Every 28 days we performed weighing and stool collection for coproparasitological exams. It was concluded that bovine animals not treated with anthelmintics presented lower body performance than animals with antihelminthic treatment, an ivermectin base and albendazole sulfoxide, regardless of race. However, losses caused due to parasitism by gastrointestinal nematodes vary from property to property. (AU)

• FAPESP's process: 14/02961-0 - Effect of anthelmintic treatments on the performance of Nellore, Simmental and cross-breed Nellore X Simmental young cattle
• Grantee: José Henrique das Neves
• Support Opportunities: Scholarships in Brazil - Doctorate