%0 Journal Article
%T Control of infective larvae of gastrointestinal nematodes in heifers using different isolates of nematophagous fungi Controle de larvas infectantes de nemat車ides gastrintestinais de novilhas por diferentes isolados dos fungos nemat車fagos
%A Manoel Eduardo da Silva
%A Jackson Victor de Ara迆jo
%A Fabio Ribeiro Braga
%A Filippe Elias de Freitas Soares
%J Revista Brasileira de Parasitologia Veterin芍ria
%D 2013
%I Col谷gio Brasileiro de Parasitologia Veterinaria
%X The effect of different nematophagous fungi [Duddingtonia flagrans (AC001 and CG722) and Monacrosporium thaumasium (NF34)] with regard to controlling infective larvae (L3) of nematodes after gastrointestinal transit in female cattle (3/4 Holstein ℅ Zebu) was evaluated. A total of 24 pubescent female cattle were used, weighing approximately 320 kg each one. There were three treatment groups, each contained six animals that received 150 g of pellets (0.2 g of mycelium), orally in a single dose, in a sodium alginate matrix containing mycelial mass of the fungus D. flagrans (AC001 or CG722) or M. thaumasium (NF34); and one control group (without fungi). Fecal samples were collected from the animals at intervals of 12, 15, 18, 21, 24, 48, and 72 hours. At the end of 17 days, the L3 not subjected to predation were recovered by means of the Baermann method. The fungal isolates tested were capable of destroying the L3 after gastrointestinal transit. It was observed that within 72 hours, the isolates AC001, CG722, and NF34 showed a higher predatory activity (81.2%, 97.3%, and 98.3%, respectively). The results justify the need for studies in the field, and over longer intervals, in order to observe the efficiency of the fungus D. flagrans, or even M. thaumasium, for environmental control over nematodes in naturally infected cattle. No presente estudo, foi avaliado o efeito de diferentes fungos nemat車fagos [Duddingtonia flagrans (AC001 e CG722) e Monacrosporium thaumasium (NF34)] no controle de larvas infectantes (L3) de nemat車ides ap車s o transito gastrointestinal em f那meas bovinas (3/4 Holand那s x Zebu). Um total de 24 f那meas bovinas pubescentes foram utilizadas, pesando aproximadamente 320 kg cada. Foram utilizados tr那s grupos de tratamento; cada um contendo seis animais que receberam por via oral de 150 g de p谷letes (0,2 g de mic谷lio), em dose 迆nica, em uma matriz de alginato de s車dio contendo massa micelial dos fungos D. flagrans (AC001 ou CG722), M. thaumasium (NF34), al谷m de um grupo controle (sem fungo). Amostras de fezes foram colhidas dos animais em intervalos de 12, 15, 18, 21, 24, 48 e 72 horas. No final de 17 dias, as L3 n o predadas foram recuperadas pelo m谷todo de Baermann. Os isolados de fungos testados foram capazes de destruir as L3 ap車s transito gastrointestinal. Observou-se ap車s 72 horas, os isolados AC001, CG722 e NF34 mostraram uma maior atividade predat車ria (81,2%, 97,3% e 98,3%, respectivamente). Estes resultados justificam a necessidade de estudos a campo e em intervalos mais longos, a fim de observar a efic芍cia dos fungos D. flagrans ou mes
%K Fungos nemat車fagos
%K Duddingtonia flagrans
%K Monacrosporium thaumasium
%K nemat車ides
%K bovinos
%K Nematophagous fungi
%K Duddingtonia flagrans
%K Monacrosporium thaumasium
%K nematodes
%K cattle
%U http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-29612013000100078