Date of this Version



© 1991, The Board of Regents of the University of Nebraska on behalf of the University of Nebraska–Lincoln Extension. All rights reserved.


This publication addresses the identification, prevention and control of internal parasites in swine and lists characteristics of principle dewormers.

Whether pigs are raised in confinement or on pasture, controlling internal parasites is essential to the overall herd health program. Recent studies by Tom Kennedy of A.E.F. Research, Inc, Waunakee, WI, have shown that worm infestation is prevalent on both a farm and individual pig basis. Of the farms examined, 91 percent raised pigs on concrete, wire or slotted floors, but more than 90 percent of all farms were infested with one or more kinds of worms.