Controle biológico de ciatostomíneos de eqüinos resistentes a ivermectina e pamoato de pirantel com o fungo Monacrosporium thaumasium

• Ano de defesa: 2010
• Autor(a) principal: Tavela, Alexandre de Oliveira
• Orientador(a): Araújo, Jackson Victor de
• Banca de defesa: Ribeiro Filho, José Dantas , Nero, Luís Augusto , Lima, Walter dos Santos , Guimarães, Marcos Pezzi
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Viçosa
• Programa de Pós-Graduação: Mestrado em Medicina Veterinária
• Departamento: Biotecnologia, diagnóstico e controle de doenças; Epidemiologia e controle de qualidade de prod. de
• País: BR
• Palavras-chave em Português: Fungos nematófagos; Monacrosporium thaumasium; Eqüinos
• Palavras-chave em Inglês: Nematophagous fungi; Monacrosporium thaumasium; Horse
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIA::MEDICINA VETERINARIA PREVENTIVA
• Link de acesso: http://locus.ufv.br/handle/123456789/5007

The viability of a formulation using the nematode-trapping fungus Monacrosporiun thaumasium was assessed for the biological control of free living stages of horse cyathostomin. Two groups (fungus-treated and control without fungus treatment) consisted of six crossbred mares in each group, aged between 2.5 and 3.5 years, were fed in Cynodon sp. naturally infected with larvae living stages of equine cyathostomin. Each animal of the treated group received oral doses of sodium alginate mycelial pellets 1 g/10 kg live weight per week), during 6 months. In the control group, animals received 1g/10 kg live weight per week of pellets without the fungus. Significant reduction (p< 0.01) in the number of eggs per gram of feces was found for animals of the fungus-treated group compared with the control group in all months of the experiment. The percentage of reduction of EPG were 87.5%, 89.7%, 68.3%, 58.7%, 52.5% and 35.2% during June, July, August, September, October and November, respectively. In coprocultures difference was found (p<0.05) among animals in the group treated with the fungus compared to the control group in all months of the experiment, with percentage reductions of 67.5%, 61.4% and 31.8% for September, October and November, respectively. There was a difference (p<0.01) of 60.9% reduction in herbage samples collected up to 20 cm from fecal pats between the fungus-treated group and the control group, during the experimental period (May October). Difference of 56% (p<0.01) was found between the fungus-treated group and the control group in the sampling distance 20-40 cm from fecal pats. There was no difference (p>0,05) between the mean weight gain of animals in both groups. The treatment with sodium alginate pellets containing the nematode- trapping fungus M. thaumasium reduced cyathostomin in tropical southeastern Brazil and could be an effective tool for biological control of this parasitic nematode in horses.