THE OCCURRENCE OF OESOPHAGOSTOMVM SPP. IN SOWS AND GROWER PIGS IN DIFFERENT HOUSING SYSTEMS

摘要

It is well substantiated that the nodular worm Oesophagostomum spp (Oes. spp.) is able to successfully complete its life cycle indoors, although heavy infection is chiefly confined to pigs at pasture (1). The infection were more prevalent in the adultpigs than in younger pigs in the conventional rearing systems used in the Scandinavian countries during the 1980-ies (2) and the usage of straw bedding seemed to stimulate the pre-parasitic development and transmission rate (3). Therefore it may be postulated that the contemporary production systems with age segregated rearing of many grower pigs on deep straw bedding increase the risk for the pigs to become infected with Oes.spp.