XXVIL— PNEUMONIA IN THE HORSE (CONCLUSION). 



In equine pathology the name of Contagious Pneumonia is given 

 to a form of inflammation of the lung which was long confused 

 with simple pneumonia, and with the abdominal form of influenza. 

 More than half a century ago the horse was known to suffer from an 

 inflammatory lung disease, which simultaneously affected numbers of 

 animals, and differed in its course from pneumonia a frigove. It was 

 described under the titles bilious pneumonia, adynamic or ataxic 

 pneumonia, and stable pneumonia. 



Veterinary journals contain reports regarding this affection, which 

 are now more or less ancient history. The cases related are always 

 referred to simple causes, especially to the action of cold on a number 

 of patients placed under similar conditions of hygiene, feeding, and 

 work. 



The views at present held in regard to contagious pneumonia are 

 founded on clinical observation and laboratory work, and only date 

 back about ten years. In France, Cagnat, of St. Denis, published 

 in the Archives vctcrinaircs for 1884, the hrst cases clearly establish- 

 ing the occurrence of contagious pulmonary inflammation in the horse. 

 Some years" "later Messrs. Benjamin and Brun adduced others. About 

 the same time Siedamgrotzky and Dieckerhoff in Germany published 

 essays on this affection, each observer regarding it from his own par- 

 ticular standpoint. In 1887 Schutz isolated and cultivated a micro- 

 organism, which he considered the specific agent. Since then investi- 

 gations have become very numerous. MM. Chantemesse and Delamotte, 

 Galtier and Violet, have found in the lesions two microbes, which they 

 considered different from that isolated by Schutz. MM. Cadeac and 

 Leclainche have written good monographs on the subject. M. Trasbot, 

 who described the disease in his lectures under the name of " Stable 

 Pneumonia," penned a learned article on it in the eighteenth volume of 

 the Didionnaire pratique de Medecine et de Chirurgie veterinaire. Finally, 



