DISEASES OF FARM ANIMALS 169 



be obtained from the lesions of the disease pro- 

 duced in them. Glanders and farcy may again be 

 divided into two forms, acute and chronic glanders, 

 and acute and chronic farcy. 



In the acute form the disease develops rapidly, 

 the lesions form more speedily and with greater 

 rapidity than in the chronic form and the animal 

 loses strength and condition and dies within the 

 course of a few weeks, sometimes in the course of 

 a week or two. It is not unusual to meet with an 

 animal showing symptoms of both glanders and 

 farcy, especially in the acute form. 



In the chronic form the symptoms are not so well 

 marked, and a horse may go for months keeping in 

 fairly good condition and able to do its work, the 

 disease developing very slowly, and at times show- 

 ing a tendency to recover; yet such an animal is a 

 source of danger to other horses, and also to the 

 man taking care of him or driving him. A horse 

 with chronic glanders, or farcy, may give the dis- 

 ease to another in an acute form, especially if the 

 other one is more susceptible for some reason, such 

 as a less strong constitution or being run down by 

 hard work. 



Post mortem examination of horses with glan- 

 ders, or farcy, nearly always reveals the presence 

 of glanders nodules or tubercles in the lungs, and, 

 in many instances, there is no doubt but what a 

 horse may have the tubercles of glanders in his 

 lungs for some time before showing outward symp- 

 toms of the disease, and in many cases the primary 

 lesions of the infection occur in the lungs. A horse 

 with lung glanders may be a source of danger to 

 other horses and cause disease in them and yet go 

 unsuspected for some time. A case is said to have 

 occuired in Boston a number of years ago where a 



