Controle biológico de nematóides gastrintestinais de ovinos, ovos de Trichuris trichiura, Trichuris vulpis e de Anoplocephala perfoliata por fungos nematófagos

• Autor(a) principal: Silva, André Ricardo e
• Data de Publicação: 2011
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/1469
• topic: Fungos nematófagos; Controle biológico; Ovinos; Nematophagous fungi; Biological control; Sheep; CNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIA::MEDICINA VETERINARIA PREVENTIVA::DOENCAS INFECCIOSAS DE ANIMAIS

Gatrointetistinal helminthosis cause damage and can kill ruminants and other animals, including man. The indiscriminate use of anthelminthic caused the selection of populations of helminthes resistant to different chemical groups used. Nematophagous fungi are used in the biological control of gastrointestinal helminthosis, such as Duddingtonia flagrans, Monacrosporium thaumasium and Pochonia chlamydosporia. In the first experiment, sheep were treated with pellets with nematophagous fungi D. flagrans and M. thaumasium evidencing that the fungus can be used as an alternative for control of ovine gastrointestinal nematodiosis. In the second experiment, D. flagrans (AC001 isolate) and M. thaumasium (NF34a isolate) were efficient in controlling in vitro larvae in the third stage (L3) of Haemonchus contortus of ovine and can be used in the biological control of this nematode. In the third experiment, isolates of P. chlamydosporia (VC1 and VC4) had an important role in the destruction of eggs of human Trichuris trichiura. In addition, fungi D. flagrans (AC001) and M. thaumasium (NF34a) preyed L3 of H. contortus, but no predation by P. chlamydosporia was found. Thus, isolates of P. chlamydosporia (VC1 and VC4) can be potential biological controllers of Trichuris trichiura in humans and D. flagrans (AC001) and M. thaumasium (NF34a) of H. contortus for ovine. In the fourth experiment, isolates of P. chlamydosporia (VC1 and VC4) showed ovicidal activity (p < 0.05) in eggs of T. vulpis of dogs. Fungi of D. flagrans (AC001) and M. thaumasium (NF34a) did not show ovicidal effect, but P. chlamydosporia is a potential agent for biological control of T. vulpis eggs in dogs. In the fifth experiment, isolate of nematophagous fungi P. chlamydosporia (VC1) destroyed eggs of Anoplocephala perfoliata in horses. D. flagrans (AC001) and M. thaumasium (NF34a) were effective in controlling gastrointestinal nematodioisis of ovine and P.chlamydosporia isolates (VC1 e VC4) destroyed eggs of T. trichiura in humans and T. vulpis of dogs. The isolate (VC1) destroyed eggs of A. perfoliata in horses.