Evaluation of reduction in egg shedding of gastrointestinal nematodes in cattle following administration of anthelmintics

Avaliação na redução de ovos de nematódeos gastrintestinais em bovinos após a administração de anti-helmínticos

Ricardo Velludo Gomes de Soutello Wilian Marinho Dourado Coelho Fernando Paes de Oliveira José Francisco Fonzar Brenda Carla Luquetti Renata Furlan Pereira de Souza Maria Conceição Zocoller Seno Alessandro Francisco Talamini do Amarante About the authors

To evaluate the necessary time and to identify the differences among anthelmintics for the reduction of parasite eggs shed in feces, five groups of cattle were treated with moxidectin, ivermectin, levamisole phosphate, and albendazole sulphoxide. Levamisole promoted a reduction in egg count per gram (EPG-R) of 97.4% after 24 hours, moxidectin 98.3% after 36 hours, and albendazole sulphoxide 95.9% after 36 hours post- treatment. Cooperia spp. and Haemonchus spp. showed resistance to ivermectin. The results demonstrated that the diagnosis of parasite resistance in cattle can be based on a count of eggs per gram (EPG) carried out as soon as seven days after the treatment.

Anthelmintic; cattle; resistance; Cooperia; Haemonchus


Colégio Brasileiro de Parasitologia Veterinária FCAV/UNESP - Departamento de Patologia Veterinária, Via de acesso Prof. Paulo Donato Castellane s/n, Zona Rural, , 14884-900 Jaboticabal - SP, Brasil, Fone: (16) 3209-7100 RAMAL 7934 - Jaboticabal - SP - Brazil
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