118 VETERINARY PARASITOLOGY 
spores, each of which shows one or two nuclei. These 
spores are contained in cells formed by the crossing of 
membranes, thus giving the interior of the Sarcocyst, 
when magnified, the appearance of a honeycomb. 
The symptoms produced in the pig are usually not 
noticeable, but paraplegia, rash, and fever have been 
observed. 
It is doubtful whether man is infected by ingestion. 
Sarcocystis Tenella.—In this the envelope is thinner, 
but otherwise it is similar to Sarcocystis Mieschert. It is 
especially found in the adductors of the thigh of the 
sheep, and next frequently in the heart muscle, but any 
portion of the muscular system may be affected. 
MEASLES. 
“Measles” is a term denoting the condition of the 
flesh of various animals produced by the presence 
therein of Cysticerci. 
Cysticercus cellulose, for instance, is the cystic form 
of Tenia solium of man, and inhabits the muscles of the 
pig, dog, and cat. 
Cysticercus bovis is the cystic form of Tenia saginata. 
It inhabits the muscles of the ox. 
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Measles of Pork. 
This condition arises from the presence of Cysficercus 
cellulose. This is a small ovoid cyst, about 15 milli- 
metres long and 73 millimetres wide. It shows, when 
magnified, a white spot, corresponding to the invaginated 
head. If the head is extruded by pressure, it may be 
seen to be four-sided, and to carry four suckers and a 
rostellum, bearing a double row of hooks, twenty-four 
to thirty-two in number. 
The Cysticerci may be found in any or all the striped 
muscles, but the muscles chiefly affected are, in order: 
