CHAPTER X^^I. 



MALARIAL FEVER IN HORSES 



OR 



PERNICIOUS ANEMIA, SWAMP FEVER, OR SURRA. 



I. DEFINITION. — —II. ETIOLOGY. III. SYMPTOMS. IV. DIAGNOSIS. 



V. FIlOLl) WORK. — —VI. TREATMENT. VII. CONCLUSIONS. 



I. Definition. 



Pernicious anemia, or infectiou.s anemia, is known under various names 

 as swamp fever, American surra, and plain paralysis. The term perni- 



AN ACUTE CASE. FIRST STAGE. 



cious anemia seems the most suitable one to use, in the light of present 

 knowledge of the disease. 



There has been a great deal of investigation of this disease. At the 

 present time the Bureau of Animal Industry is working in co-operation 

 with the Agricultural experiment stations of various states. The disease 

 is found from Manitoba to the Gulf of Mexico. It has been proven con- 

 clusively that this disease is due to an ultra-microscopical organism capa- 

 ble of passing through the finest porcelain filters. It is found most prev- 

 alent in low, marshy localities, although the disease is seen on higher 



470 



