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第16号公告板 - Fall 2003
Parasitology- No Category
BORGSTEEDE FHM, EIJCK IAJM.
A survey of parasite infection on organic, free range and conventional pig farms in the Netherlands.
19th International Conference of the World Association for the Advancement of Veterinary Parasitology, New Orleans, Louisiana, August 10-14, 2003, page 90
Parasite infection on 11 organic, 16 free range and 9 conventional pig farms were investigated. In the period November 2001-October 2002, farms were visited four times with a three months interval. Faecal samples were collected from suckling pigs, weaned pigs, fatteners and pregnant sows. On all organic farms, on 62.5% of the free range farms and 66.7% of the conventional farms one or more positive samples (oocysts of coccidia and/or helminth eggs) were found. Infections with coccidia were most prevalent on the organic farms (90.9%) followed by the conventional farms (66.7%) and the free range farms (43.8%). Among the infections with helminths (Ascaris suum, Oesophagostomum spp, Trichuris suis), those with A. suum were most frequent (81.8% of the organic farms, 43.8% of the free range farms and 11.1% of the conventional farms). In all three farm types ca 25% of the farms were positive for Oesophagostomum spp. T. suis was present on organic (36.4%) and free range farms (31./3%) but absent on conventional farms. Infections with coccidia were most prevalent in pregnant sows (Eimeria spp), followed by suckling pigs (Isospora suis) and weaned pigs, but less in fatteners. However, in fatteners on organic and free range farms A. suum infections were frequently observed (54.5% resp 42.9%), but much less in the other groups. Infections with Oesophagostomum spp and T. suis were most observed in pregnant sows.
