Prevalence of gastrointestinal helminths,lungworms and liver fluke in sheep and goats in Norway |
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| Authors: | Atle V Meling Domke Christophe Chartier Bjørn Gjerde Nils Leine Synnøve Vatn Snorre Stuen |
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| Institution: | 1. Norwegian School of Veterinary Science, Sandnes, Norway;2. LUNAM Université, ONIRIS, Nantes-Atlantic College of Veterinary Medicine, Food Science and Engineering, UMR 1300 BIOEPAR, Nantes F-44307, France;3. Norwegian School of Veterinary Science, Oslo, Norway;4. Norwegian Goat Health Service, Oslo, Norway;5. Animalia, Norwegian Sheep Health Service, Oslo, Norway |
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| Abstract: | The present study describes the occurrence of various gastrointestinal helminths, lungworms and liver flukes in Norwegian sheep and goats as assessed from faecal samples and post mortem examinations performed between 2007 and 2010. Faecal samples for gastrointestinal nematode egg counts were collected from 77 sheep flocks and 30 dairy goat flocks from three geographical regions in Norway. Additionally, thirty-two lambs and 16 adult goats were euthanized for necropsy examination and for identification of adult gastrointestinal nematodes and tapeworms, lungworms and liver flukes. The survey showed that there was a higher mean excretion of trichostrongyle eggs in sheep than in goats at the individual level (392 EPG vs. 154 EPG, p < 0.001). For both host species, the mean prevalence and intensity of excreted trichostrongyle eggs were significantly higher in the southern coastal region compared with the inland and northern regions (p < 0.001). Third stage larvae of Trichostrongylus/Teladorsagia, Haemonchus and Nematodirus type were the most prevalent ones in the coprocultures from sheep, whereas larvae of Trichostrongylus/Teladorsagia and Nematodirus type dominated in goats. The most prevalent gastrointestinal nematode species found at necropsy was Teladorsagia circumcincta (75.0 and 81.2% respectively in sheep and goats), while the largest mean worm burdens were recorded for Haemonchus contortus in sheep (724 ± 623) and T. circumcincta in goats (377 ± 529). Other gastrointestinal nematode species were present at low prevalence or in low numbers. |
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| Keywords: | Gastrointestinal helminths Lungworms Liver flukes Sheep Goat Norway |
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