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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Atividade predatória sobre larvas de trichostrongilídeos de isolados fúngicos do gênero Monacrosporium após a passagem pelo trato gastrintestinal de bovinos / Predatory activity of isolates fungi of the genus Monacrosporium on trichostrongylids larvae after passage through the gastrointestinal tract of bovine

Ribeiro, Raul Rio 27 February 2003 (has links)
Made available in DSpace on 2015-03-26T13:47:22Z (GMT). No. of bitstreams: 1 texto completo.pdf: 166500 bytes, checksum: 3302c1d593be1217f7c0c242556c0bb0 (MD5) Previous issue date: 2003-02-27 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / Three isolates of predators fungi of the genus Monacrosporium (M. sinense SF-53, M. appendiculatum CGI and M. sinense SF-139) were evaluated in vivo regarding the capacity of supporting passage through the gastrointestinal tract of calves without losing the ability to entrap infective Cooperia sp. and Haemonchus sp. larvae. The isolates SF-53 and CGI were managed orally, separately to the calves, fresh mycelium form at dose only of 100 g. Collected fecal Samples 12, 18, 24, 48, 72 and 96 hours after the treatments were allocated in Petri dishes with 5-cm diameter, added of 750 infective Cooperia sp. and Haemonchus sp. larvae. At the end of the experiment, reproductive structures (conidia) from both isolates were visualized in every the studied times. There was significant reduction of the average number of nematodes larvae recovered of the Petri dishes when compared with the control group. Such evidences confirm the transit of these fungi by the digestive tract of the calves without loss of the predatory viability. There are no evidences that the isolated SF-139 has passed by the gastrointestinal tract of calf after oral administration, fresh mycelium form at dose only of 87 g. / Três isolados de fungos predadores do gênero Monacrosporium (M. sinense SF-53, M. appendiculatum CGI e M. sinense SF-139) foram avaliados in vivo quanto à capacidade de suportar a passagem pelo trato gastrintestinal de bezerros sem perda da habilidade para predar larvas infectantes de Cooperia sp. e Haemonchus sp. Os isolados SF-53 e CGI foram administrados por via oral, separadamente aos bezerros, na forma de micélio fresco em dose única de 100 g. Amostras fecais coletadas 12, 18, 24, 48, 72 e 96 horas após os tratamentos foram alocadas em placas de Petri com 5 cm de diâmetro, adicionadas de 750 larvas infectantes de Cooperia sp. e Haemonchus sp. Ao final do experimento, estruturas reprodutivas (conídios) de ambos isolados foram visualizadas em todos os tempos estudados. Houve redução significativa do número médio de larvas de nematóides recuperadas das placas de Petri quando comparado com o grupo controle. Tais evidências confirmam o trânsito destes fungos pelo trato digestivo dos bezerros sem perda da viabilidade predatória. Não existem evidências de que o isolado SF-139 tenha passado pelo trato gastrintestinal do bezerro após administração oral, na forma de micélio fresco, em dose única de 87 g.

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