THE RESPIRATORY ORGANS 3*3 



and small buds (farcy buds) form at the valves of these vessels, and 

 these generally in due course burst, and discharge a thin purulent 

 fluid. Glanders and farcy are both under the Contagious Diseases 

 (Animals) Act, and being very dangerous diseases, should be reported 

 immediately on being noticed or suspected, and the animal ought to 

 be destroyed at once. Thorough disinfection of the stable is also of 

 the greatest importance, in order to prevent the spread of the disease. 



498. In doubtful cases of glanders a preparation called Mallein 

 is now frequently injected under the skin on one side of the neck. 

 If the animal is affected with glanders, a painful swelling arises at 

 the seat of the injection, with constitutional disturbances, there 

 being a rise of temperature of 3 to 5 . If glanders is not 

 present, no reaction takes place. It may be noted that some 

 authorities state that the repeated injection of mallein into the body 

 of a glandered horse has a curative action as well as a protective 

 influence, rendering the animal immune from further attacks. The 

 question has not yet been definitely settled, but the law now is that 

 all horses and ponies must be inoculated with mallein before being 

 put down into a coal-mine. 



499. Cough is a forcible expulsion of inspired air, and may be 

 acute or chronic, and can only be looked upon as a symptom. It may 

 arise from a variety of causes, such as sore throat, bronchitis, inflam- 

 mation of the lungs, worms or parasites in the windpipe, disease of 

 the heart, etc., or from foreign bodies in the throat or stomach ; and 

 also through reflex action from parasites in the stomach or liver and 

 from irritation of the womb. Now, as all these causes produce 

 distinct and peculiar sounds, it is therefore of the greatest impor- 

 tance to find out the cause before any proper treatment can be 

 recommended or adopted. Neglected simple catarrh may cause a 

 slight cough from irritation of the lining of the throat, in which case 

 a stimulating embrocation, applied round the throat from ear to ear, 

 may give some relief. For preparations for the relief of cough see 

 par. 1064, Nos. I. and II., and for further treatment par. 494. 



500. Laryngitis, or Inflammation of the Larynx, commonly 

 called sore throat, may result from an injury, neglected catarrh, or a 



