No. 6. DEPARTMENT OF AGRICULTURE. lift 



buildings occupied by the sound hogs, the whole herd would be ex- 

 posed and much loss might occur. 



The need for quarantining for the period recommended depends 

 not only upon the fact that the hog may have been exposed to 

 cholera and that subsequently it may develop and thus be able to 

 propagate this diseases but also in the fact that animals coming 

 from a herd in which cholera exists, may harbor the germs of cholera 

 in their intestines for a long time. The quarantine advised is valu- 

 able in diminishing the danger from both sources. 



Mange of Horses. — This is a prevalent disease in several of the 

 western states, and it is said that it is becoming more prevalent 

 from year to year. Mange and glanders })revail so extensively 

 among horses in some of the far western states that horses from 

 such states are refused admission into some of the states of the 

 middle west until they have been carefully examined and their free- 

 dom from infection has been proven. Such inspection at the border 

 of the State would not be justifiable so far as Pennsylvania is con- 

 cerned, because, although glanders and mange are from time to 

 time introduced from other states, it is possible to control them 

 by measures taken within the State and to require and provide for 

 inspection would cost more than the sum of the present or prospec- 

 tive losses from these two diseases. 



Mange of horses was practically unknown in Pennsylvania until 

 about four jears ago. During recent years it has prevailed more 

 extensive! ■ each year and requires careful attention in order that 

 its distribution may be kept within bounds and the disease may be 

 prevented from spreading within the State. Up to this time nearly 

 all of the horses afflicted with mange were contaminated before 

 they reached Pennsylvania, although upon some farms and in some 

 stables the disease has gained considerable distribution among na- 

 tive horses. This disease has prevailed most extensively in the 

 counties of Allegheny, Berks, Northumberland, Perry and Phila- 

 delphia. 



Mange is injurious to horses in that it destroys the coat and the 

 appearance of the animal and by the irritation of the skin that it 

 causes, the rest of the afflicted horse is disturbed and broken. 

 From this cause a horse looses strength and is unable to do his ac- 

 customed work. The disease is not a direct cause of death, al- 

 though it is stated that on the open ranches of the west, horses 

 with mange are less able to resist the cold and exposure of winter 

 than horses without this disease of the skin, and in this way mange 

 is indirectly a cause of mortality. 



Foals and young horses are more likely to be afflicted than ma^ 

 ture horses, but iii this State the disease has occurred among horses 

 of all ages. 



