OCR Text |
Show Small Pigs Susceptible to Worm Infestation Roundworms live in the small intestines intes-tines of infested pigs. The females produce millions of minute eggs, which are scattered over the ground with the manure. These eggs are swallowed by young pigs, and the small worms hatch out in the intestines ; they then pass to the liver through blood vessels, then to the heart and from there to the lungs, where they become much larger. After a time they work their way up to the throat and then are swallowed and pass down to the small intestine. This curious journey requires re-quires about ten days, and after that the worms grow to maturity in the intestine, in-testine, in about two months. Small pigs are much more susceptible to infestation in-festation with worms than are older ones, and require special protection for about four months. Sanitary measures meas-ures are necessary to keep out infestation infesta-tion of roundworms. |