476 Pork Production 



evenly over it. The hogs are then allowed to eat the 

 feed. 



The lung worm, Strongylus paradoxus, is a common 

 parasite of young hogs. It is a small hair-like worm 

 varying in length from .6 to 1.6 inches, and usually 

 is found in the small bronchial tubes mixed with 

 mucus. 



The first symptom occurring in verminous bronchitis is 

 coughing on leaving the bed, or after exercising. In 

 badly infested hogs, paroxysms of coughing occur and 

 considerable mucus may be forced out. The appetite 

 of the pig remains good, and hogs that are well cared for 

 do not become unthrifty. 



The preventive treatment is the same as recommended 

 for intestinal worms. Hogs that receive special care such 

 as all the feed that they can eat and well-ventilated 

 sleeping quarters and a clean dry bed, do not become 

 stunted or unthrifty when infested with lung worms. 

 There is no effective line of medicinal treatment for this 

 disease. 



The kidney worm, Sclerostoma pinguicola, is commonly 

 found in the fat which surrounds the kidney. It is from 

 1 to 1.5 inches long and appears dark or mottled when 

 seen against the white fatty tissue. This parasite may 

 irritate the parts that it infests, but does not seem to 

 produce visible symptoms of disease. Although paralysis 

 of the hind parts is attributed to the kidney worm by 

 many stock-men, there is no evidence that would indicate 

 this. 



Because of the location of this parasite, no medicinal 

 application will destroy it. The preventive treatment is 

 the same as recommended for controlling the spread of 

 other round worms. 



