Equine Infectious Anemia or Swamp Fever.

INFECTIOUS ANEMIA, or swamp fever, also known in some sections of the United States as malarial fever, slow fever, and mountain fever, is one of the most serious maladies of the horse, and because of its insidious nitture and widespread distribution it has become a problem of world-wide concern. Infectious anemia is an acute or chronic disease of equines, caused by a filtrable virus that poisons the blood and characterized principally by intermittent fever, marked depression, progressive weakness, loss of weight, edema (dropsylike swelling), congestion and icterus (jaundice) of the visible mucous membranes, and anemia of a transitory or progressive type. Long recognized as a specific infectious disease of equines, infectious anemia was reported from Eui-ofje as early as 1843. It occurs in various parts of Europe, Asia, Africa, and North America (P).* Recently the disease has been reported from Venezuela, South America. The disease has existed in the United States for fit least 50 years, and since 1900 has been autlientically reported in isolated areas from 29 States, In 15 of these States the virus was recovered by horseinoculation tests,-while diagnosis in the other 14 States was based on clinical examination. Since 1932, outbreaks of the disease have been