2017/12/20 by A. Duvauchelle-Waché, Nadine Ravinet, Duvauchelle-Waché, Aurore +15
Veterinary · #Helminth infection and control
paper · pdf · doi:10.15454/1.5137771616610366e12
Grazing ruminants are always infested by gastrointestinal nematodes. Whatever the animal supply chain, the answer is often an insufficiently reasoned use of anthelmintics, which involves a development of resistant parasites. Nowadays, it is necessary to better use these treatments. The project aimed at answering two major questions: “when to treat” and “who to treat” in dairy cows, sheep and goats, and to understand motivations of farmers and advisers. It appears that, for dairy cows, it would be better to treat at the beginning of the housing period, only inadequately immunized young cows that are severely exposed to parasites in pasture. For small ruminants, the mixing coproscopy provides a good estimation of the level of excretion of a group of animals and enables to target the time of intervention. Moreover, at the individual level, the criteria used by goat and cow farmers permit to correctly select animals to be treated. For cattle and goats, grazing parasitic risk periods can be estimated by an expert system. A. Duvauchelle-Waché et al. 136 Innovations Agronomiques 55 (207), 135-153 Finally, it appears that actors of the cattle industry are less aware of the targeted-selective treatment than the goat sector, but raising their awareness is possible.