HOG MEASLES— CYSTICERCUS CELLULOSE 197 



(c) The embryos in about one month become encapsuled, 

 which process lasts about three months. 



(d) A calcification of the encapsuled trichina begins in 

 from three to six months and lasts about eighteen months. 

 Encapsuled trichina can live for years in the muscle. They 

 produce infestation when ingested; unencapsuled trichina 

 are killed in the stomach. The favorite seats of trichina are 

 the muscular portion of the diaphragm, the larynx and 

 tongue, abdominal and intercostal muscles. 



Symptoms. — Symptoms of trichinosis in swine from natural 

 infestation have not been observed. From artificial infesta- 

 tion the symptoms resulting are diarrhea and colic at the end 

 of the first week, and stiffness, paralysis of the limbs, pruritus, 

 difficult mastication, dysphagia, dyspnea, hoarseness, and 

 edematous swellings in the second or third week. Usually, 

 however, these cases fully recover in from four to six weeks. 



Treatment. — No treatment is of any avail once the worms 

 have reached the muscles. As a prevention the hog yards 

 should be kept free from rats and mice. 



HOG MEASLES. CYSTICERCUS CELLULOSE. 



Definition. — Cysticercus cellulosae is the juvenile form of the 

 tapeworm Taenia solium of man. Young swine are infected 

 by eating the proglottides gathered from human feces. The 

 eggs are digested in the stomach and the six hooked embryos 

 are set free after which they pass through the bowel wall and 

 via blood reach the muscles where after three months they 

 form cysts. The favorite seats of the cysts are in the abdom- 

 inal muscles, diaphragm and tongue. The cysts are pea- to 

 bean-sized, dull white in color, each having an inverted head 

 provided with four suckers and a double row of hooks. 

 Measles is a rare disease among American swine. 



Symptoms. — During life symptoms are rarely observed, 

 although in isolated instances severe brain disturbance, 

 blindness, paralysis of the tongue, pleuritis and peritonitis 

 have been noted. If the tongue is involved the cysts may be 

 seen on its ventral surface. 



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