Undersökning av parasitförekomst hos grisar hållna under ekologiska eller KRAV-förhållanden i Sverige

Sammanfattning: The pig production in Sweden is divided into conventional and organic production, with the organic production divided into EU organic and KRAV production. Pigs are divided into different age categories: weaned pigs, growing pigs, fattening pigs, gilts/sows before farrowing and dry sows. Roundworm, nodular worm, whipworm, coccidia, red stomach worm, threadworm and lungworm are common parasites in pigs affecting growth, feed conversion and economy. Organic pigs are more exposed to parasites because of outdoor stay and deworming could help if used with care. The aim of this project was to investigate parasites in pig herds with organic production. The investigation would increase the knowledge of parasites in different age categories in currently used production systems and contribute to good recommendations about parasite control and treatment. A modified McMaster technique was used to identify and quantify parasite eggs with microscope. Larval culturing and microscopy were used to distinguish eggs from nodular worm and red stomach worm. Roundworm, nodular worm, whipworm and coccidia were found in all age categories. Threadworm was only identified in dry sows and gilts/sows before farrowing. Nodular worm and coccidia showed highest quantity of positive samples at herd and sample level followed by roundworm and whipworm. Roundworm and nodular worm had highest quantity of eggs per gram faeces followed by whipworm and threadworm. The results corresponded to previous studies in parasite occurrence despite new conditions. More samples, herds and environmental factors should be investigated in conjunction with parasite occurrence to get broader knowledge and to give good recommendations in parasite control and treatment.