title: [The value of lungworm vaccination in calves (author's transl)].
abstract: Although the lungworm vaccine was found to be useful under field conditions, some questions remain, particularly epidemiological ones. Experiments with housed and grazing calves were carried out to elucidate a number of these problems. From these experiments in which vaccinated and unvaccinated calves were challenged, it was apparent: 1. that the immunity developed by vaccinated calves could resist a heavy challenge without clinical symptoms; 2. that vaccinated calves exposed to a heavy challenge could produce small numbers of lungworm larvae. It was shown that, despite the hard winter of 1978/1979, infectious lungworm larvae were present on the pasture in the spring of 1979.
mesh_terms: D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000517:prevention & control*; D004021:Dictyocaulus / Q000276:immunology*; D004022:Dictyocaulus Infections / Q000517:prevention & control*; D008681:Metastrongyloidea / Q000276:immunology*; D014611:Vaccination / Q000662:veterinary*
vernacular_title: De waarde van longwormvaccinaties bij kalveren.