^8 



DISEASES OF MUSCLES AND TENDON'S. 



cysticerci 



but the luicertaiiity in this respect should prevent such meat 

 being consumed. The cysticerci are killed at 

 a, temperature of 125° to 130° Fahr. 



Lesions. The lesions are represented by 

 cysts alone — i.e., by semi-transparent l)ladders, 

 each of which contains a scolex or head armed 

 with four suckers and a double crown of hooks. 

 The little bladders are most commonly found 

 in the muscles, lodged in the interfascicular 

 tissue, which they slightly irritate. 



The number present varies extremely, 



depending on the intensity of infestation and 



the number of eggs swallowed. Whilst in 



to discover, in others 



Fig. 36. — Eggs of pork- 

 ineasle tapeworm {Tcenia 

 solmvi) : a, with primi- 

 tive vitelline membrane ; 

 6, without primitive vitel- 

 line membrane, but with 

 striated embrj-ophore . 

 X 450. (After Leuckart.) 



some cases difficult 

 they are so numerous that the tissues 

 ap2)ear strewn with them. 



They are commonest in the muscles 

 of the tongue, neck, and shoulders, in 

 the intercostal and psoas muscles, and in 

 those of the quarter. 



The viscera — viz., the liver, kidneys, 

 heart, lungs, etc. — are less commonly in- 

 fested, and in these organs the cysts 

 degenerate very rapidly. In animals 

 which have been infested for a long time, 

 the cysts may even have undergone caseo- 

 calcareous degeneration, the liquid being 

 absorbed and the lesions presenting the 

 ajDpearance of little oblong firm nodules. 



On cutting through masses of muscle 

 the vesicles protrude from between the 

 bundles. 



In young animals, infestation with 

 cysticerci causes wasting and ill-health; 

 subsequently the patients improve in 

 ajipearance, later on fatten, and gain 

 marketable condition. 



Of the carcases examined in Prussian 

 slaughter-houses between 1876 — 8t2, one 

 in every 305 was found infested ; between 

 1885 — 1)3, one in every 537. 



Treatment. There is no curative treat- 

 ment. Only preventive measures are of 



Fi(i. o7. — Half of hog, showing the 

 portions most likely to become 

 infested with pork measles. 

 (After Ostertag.) 



