title: Biological control of trichostrongyles in calves by the fungus Duddingtonia flagrans fed to animals under natural grazing conditions.
abstract: The present study was conducted in the 1993 grazing season with yearling calves exposed to a pasture with a natural mixed trichostrongyle larval infection. It was shown that daily feeding with the microfungus Duddingtonia flagrans during the first 2 months of the season led to a lowered herbage infectivity and a reduced acquisition of Ostertagia sp. and Cooperia sp. later in the season. In addition, the procedure delayed the onset of clinical disease. This was due to the nematode-destroying effects of the fungi in the dung excreted by the fungus-treated calves, as evidenced by results from a parallel in vitro assay on faecal larval cultures. The paper discusses future research needs before practical biological control can be implemented.
authors: Department of Veterinary Microbiology, Royal Veterinary and Agricultural University, Frederiksberg C, Denmark.
authors: M
authors: M
authors: Larsen
authors: P
authors: P
authors: Nansen
authors: J
authors: J
authors: Wolstrup
authors: J
authors: J
authors: Grønvold
authors: S A
authors: SA
authors: Henriksen
authors: A
authors: A
authors: Zorn
mesh_terms: D000821:Animal Feed; D000818:Animals; D001835:Body Weight; D002417:Cattle; D002418:Cattle Diseases; D005243:Feces / Q000469:parasitology; D007814:Larva; D003904:Mitosporic Fungi / Q000502:physiology*; D009348:Nematoda / Q000302:isolation & purification; D009349:Nematode Infections / Q000517:prevention & control / Q000662:veterinary*; D010028:Ostertagia / Q000302:isolation & purification; D010029:Ostertagiasis / Q000517:prevention & control / Q000662:veterinary*; D010435:Pepsinogens / Q000097:blood; D010572:Pest Control, Biological; D012621:Seasons; D015430:Weight Gain
chemical_list: D010435:Pepsinogens