814 



DISEASES OF CATTLE. 



sents a slice of beef cut from a roast in Calcutta. It is said that 

 the buttocks of cattle are usually more infested than the rest of the 

 body. Fig. 1077 shows the ox-measle magnified to nine diameters. 



Fig. 1077 — Cysticercus Bovis. 



Ox-measle. 



Fig. 1078.— Heart Infested with Measles. 



Fig. 1078 represents the appearance of the heart of a calf when thus 

 infested. The cy§ticercus in the heart does not acquire as great a 

 size as elsewhere, perhaps on account of the density of the muscular 

 tissue of that organ. 



Fig. 1079 is an accurate representation of a' 

 tape-worm measuring thirteen feet in length, re- 

 duced to one sixth. Such a worm consists of 

 about 1,200 segments, or joints, each capable of 

 developing 30,000 eggs. During life the mature 

 segments are cast off at the rate of about 400 

 a month, so that about one hundred and fifty 

 million of these eggs may be produced annually 

 by a single worm. 



We have given the more common parasitic 

 diseases of cattle, with the treatment for each. 

 It has been seen that cattle harbor parasites 

 which can be transferred to the human body 

 when beef is eaten as food. The various forms 

 of parasitic diseases vary with the influence of 

 season, soil, and locality. As the health of the 

 public is so largely dependent upon the whole- 

 some condition of our live stock, the subject of 

 preventing parasitic diseases, as far as this may 

 be done, becomes one of grave importance. 



Fig. 1078.— fleet Tape- 

 worm. 



