![]() ![]() This is an important adaptation for keeping the worm around through cold winters when eggs and larvae don't survive well on pasture.Īnother important adaptation of the barber pole worm is a phenomenon called periparturient rise. It usually takes about 3 weeks to complete this life cycle, however this time may be shorter or longer depending on environmental conditions.īarber pole larvae can also undergo a process called arrested development where they sit quietly in the abomasum (the true stomach of ruminants) following infection and don't become adults until several months later. These larvae climb up on forages (usually in the mornings when there is dew on the grass and usually only 1 to 2 inches up the plant) where they are ingested by the goat, thus completing the cycle. Once they find favorable conditions, the eggs hatch and the barber pole larvae progress through two non-infective stages. Barber pole eggs and larvae love warm, moist conditions and hate cold or very hot, dry conditions. Successful development of larvae outside the host depends on climate. These eggs are passed through feces into the pasture. An adult female barber pole worm has the potential to lay in excess of 5,000 eggs per day. These larvae pass into the stomach or intestines where they mature into adult worms. First, the goat ingests infective barber pole worm larvae from forages they graze. So with proper management, we can strive to control rather than eradicate internal parasites.Īs with all parasites, it is necessary to understand their life cycle in order to control them. ![]() In the absence of this exposure the goat’s body will not be able to mount a defense quickly enough to stave off disease symptoms when faced with a large parasite challenge and will easily die. By continual exposure to small numbers of internal parasites, the goat’s immune system is able to maintain natural resistance. Contrary to what one might think, it is actually not in the goat’s best interest to have a worm-free herd. The key concept to remember is that infection is not paramount to disease. All goats are infected with barber pole worms to some extent. ![]()
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