EPIZOOTIC LYMPHANalTIS. 50'^ 



of glanders and of all. reacting cases seen by them in their respec- 

 tive practices. 



5. To 2yj'ohibit the use of mallein, except by veterinary surgeons 

 and medical men. If these two rules were made law, they would 

 greatly help to check the spread of glanders, by preventing to a 

 considerable extent the sale of reacting horses, which in all cases 

 are a source of danger. Professor McFadyean (" Journal of Com- 

 parative Pathology," Dec, 1897) wisely remarks : " Glanders at 

 the present time is mainly spread from stable to stable not by the 

 traffic in clinically glandered horses, but by the sale and purchase 

 of horses that have the disease in an occult forai, and no plan which 

 fails to take note of this fact is deserving of serious consideration." 



Epizootic Lymphangitis 



{^Neapolitan or Benign Farcy^. 



NATURE. — This disease, which was first described by Rivolta in 

 1873, is a specific and contagious form of lymphangitis, and 

 appears to be confined to horses, donkeys and mules. It is well 

 known in Italy, Algeria, France, Egypt, Guadaloupe, and other 

 temperate and torrid lands ; but it cannot exist in cold countries. 

 Dr. Lingard recognised it in 1899 among horses at the Indian Re- 

 mount Depots of Karnal and Hapur, where it had been mistaken 

 for farcy, with the result that many remounts were needlessly de- 

 stroyed, although tests with mallein (p. 614) gave negative results. 

 In this case, it had been imported by mules from Italy. 



CAUSE. — This disease is due to a microbe, the cryptococcus far- 

 ciminosus of Rivolta, which is about one six-thousandth of an inch 

 in diameter. When pus from a freshly-opened abscess is micro- 

 scopically examined with a power of 400 or 500, these organisms 

 appear as "rounded bodies with somewhat pointed ends, or one 

 end pointed and the other rounded, highly refractile and presenting 

 a double contour. At first sight one is immediately reminded of 

 the likeness of this organism to the coccidiuni oviforme so fre- 

 quently observed in the liver of the rabbit, or of a yeast cell, sac- 

 chromyces " (Lingard). 



SYMPTOMS, COURSE, PERIOD OF INCUBATION AND MOR- 

 TALITY. — The symptoms of this disease are extremely like those 

 of farcy, from which, however, it can be clearly distinguished by 

 the microscopical examination of the organisms, and by the fact 

 that mallein produces no reaction in horses which are suffering 

 from it. 



" This disease developes from wounds, after a period of incuba- 

 tion of about three months. Multiple abscesses accompanied by 



