Economic impact of gastrointestinal nematodes in Morada Nova sheep in Brazil

Autor(es)

de Souza Chagas, Ana Carolina ; Tupy, Oscar ; dos Santos, Isabella Barbosa ; Esteves, Sergio Novita

• Tipo de documento: Artigo Científico
• Fonte: REVISTA BRASILEIRA DE PARASITOLOGIA VETERINARIA; v. 31, n. 3, p. 10-pg., 2022-01-01.

Resumo

This study evaluated the economic impact of gastrointestinal nematode (GIN) infection in Morada Nova lambs under different parasite chemical control conditions. For this, 246 lambs, in the rainy and dry season, were randomized into groups according to their anthelmintic treatment with levamisole: control (CT: no treatment); routine treatment (RT: treated every 42 days); and targeted selective treatment (TST: treated according to the average daily weight gain, DWG). From 63 days of age (D63) to D210, the lambs were weighed and monitored for GIN infection parameters. Spending on anthelmintics in the production system was 1.3% of the total economic result. The economic result per animal (R$ 5.00 = US$ 1.00) was higher in the RT group, amounting to US$ 6.60 in the rainy and US$ 5.69 in the dry season, due to higher DWG. Thus, RT presented economic results 14.4% and 10.9% higher than CT, and 7.2% and 1.9% higher than TST, in the rainy and dry season, respectively. However, fast development of resistance made RT unfeasible. Here, the economic impact of GIN infection on a national scale is discussed, demonstrating its importance and the impossibility of profitable and sustainable sheep production without adequate control. (AU)

• Processo FAPESP: 19/02929-3 - Estratégia de tratamento anti-helmíntico seletivo baseado no ganho de peso em cordeiros Morada Nova
• Beneficiário: Ana Carolina de Souza Chagas
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 21/02535-5 - Abordagem parasita-hospedeiro-ambiente para controle da resistência anti-helmíntica em rebanhos ovinos
• Beneficiário: Ana Carolina de Souza Chagas
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 18/16070-1 - Estudo do impacto da infecção por nematóides gastrintestinais no desempenho de Cordeiros Morada Nova para desenvolvimento de método seletivo de controle parasitário
• Beneficiário: Isabella Barbosa dos Santos
• Modalidade de apoio: Bolsas no Brasil - Doutorado