Atividade ovicida do fungo Pochonia chlamydosporia sobre ovos de Ascaris suum e atividade predatória de fungos nematófagos sobre formas infectantes de Oesophagostomum spp

• Main Author: Ferreira, Sebastião Rodrigo
• Publication Date: 2011
• Format: Master thesis
• Language: por
• Source: LOCUS Repositório Institucional da UFV
• Download full: http://locus.ufv.br/handle/123456789/5071
• topic: Suínos; Ascaris suum; Pochonia; Swine; Ascaris suum; Pochonia; CNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIA

Swine meat is one of main sources of animal protein consumed in the world and strong demand for swine meat in the Asian continent has stimulated the development of the internal market, however, has been demanded a production system aimed at animal welfare and organic production. Even though, in given situations intestinal parasites remain a problem for breeding these animals, especially when this is done through the extensive management system. Among these, stands out the parasitic nematodes, Ascaris suum and Oesophagostomum spp, whose infective forms are present in the environment. By the way, the objectives of this study were to evaluate the ovicidal activity of fungus Pochonia chlamydosporia on A. suum eggs and predatory activity of the Duddingtonia flagrans, Monacrosporium sinense and Artrhobotrys robusta on infective forms of Oesophagostomum spp. For this purpose, four experimental trials were set up, where it was evaluated (in vitro) activity of these fungi on the infectious forms of these nematodes and (in vivo) test which evaluated the ability of P. chlamydosporia and D. flagrans to support the passage through the gastrointestinal tract of pigs. Isolates fungal of P. chlamydosporia were able to destroy A. suum eggs in vitro and capable of supporting the passage through the gastrointestinal tract of pigs without losing its capacity to destroy eggs. D. flagrans, M. sinense and A. robusta predated Oesophagostomum spp L3 in vitro. D. flagrans kept its predatory ability after passing through the gastrointestinal tract of pigs. Results presented in this study suggest that the fungi P. chlamydosporia and D. flagrans can be used to assist in the control of infectious forms of the nematodes A. suum and Oesophagostomum spp, respectively.