EPIZOOTIC LYMPHANGITIS 59 



" ' Salted' horses are animals that have recovered from the disease, 

 and they possess a high degree of immunity. 



"They often suffer from secondary fever during the horse -sickness 

 season, which is not attended with much constitutional disturbances, but 

 undoubted cases which recovered are known to have died from a secondary 

 attack of the disease one or more seasons after the first attack." 



EPIZOOTIC LYMPHANGITIS 



English literature is seriously deficient in articles referring to this 

 disease. True, so far as we are aware, the malady only appeared in this 

 country in 1902, following upon the 

 war in South Africa, and no imme 

 diate need of giving it attention had 

 arisen. 



Its prevalence in France, Sweden, 

 India, Russia, Japan, China, Italy, 

 Egypt, &c. &c., had not been con- 

 sidered of sufficient importance to 

 demand the attention of English- 

 men. 



Seeing that the disease is so 

 much like farcy, and excepting by 

 means of microscopic inspection or 



mallein indistinguishable from it, Fig. 222.-Bacillus of Epizootic Lymphangitis 



there is no direct evidence of its 



absence from our studs, but we think and believe it has but recently 

 acquired a footing in the country by the return of infected animals 

 from South Africa. 



Definition. — A contagious and inoculable disease characterized by the 

 development of abscesses and cording of the lymphatics of the skin. It 

 is essentially a local disease, due to a minute organism or cryptococcus 

 which gains access to the tissues through an open wound. The organism 

 is lemon-shaped, having one end slightly smaller than the other. It 

 measures from 3 to 4 /x in diameter, and is very easily found in the 

 discharge with a suitable microscope. Seen by this means it presents 

 a double contour, and is highly refractile. It is either free or enclosed 

 in pus corpuscles. 



The classification of the parasite is not quite clearly made out. As to 

 whether it should be placed among the sporozoa or saccharomyces must be 

 left for the present to those who have given the matter attention. 



