Aug. x, 192X 
Some Observations Regarding Eosinophilcs 
687 
No. 671.—Aged gelding with a chronic case of infectious equine 
anemia. 
At autopsy on November 4, 1918, there were found a few Strongylus 
and Cylicostomes in the cecum and colon and a small aneurism of the 
anterior mesenteric artery containing one live embryo. 
No. 753.—Four-year-old colt with a chronic case of infectious equine 
anemia. 
At autopsy there were found a moderate number of Strongylus and 
Cylicostomes in the cecum and colon and three Sciaria equina in the 
abdominal cavity. 
No. 672.—Middle-aged mare with a chronic case of infectious equine 
anemia. 
At autopsy on July 14, 1918, there were found small numbers of 
Gaslrophilus spp. and a moderate infestation of the cecum and colon with 
Strongylus and Cylicostomes. 
No. 24.—Aged animal with a chronic case of infectious equine anemia. 
At autopsy November 14, 1919, many Gastrophilus spp. were found, 
10 Setaria, a serious infestation of Strongylus and Cylicostomes in the 
cecum and colon, and a small aneurism of the anterior mesenteric artery 
containing live embryos. 
No. 25.—Twelve-year-old mare with a chronic case of infectious equine 
anemia. 
At autopsy March 18, 1920, there were found a few Gastrophilus spp. 
and a moderate number of Strongylus and Cylicostomes in the cecum and 
colon. 
No. 18. len-year-old gelding with a chronic case of infectious equine 
anemia. 
At autopsy on February 10, 1920, there were found three Gastrophilus 
spp., a few Strongylus and Cylicostomes, and a small worm-free anuerism 
of the anterior mesenteric artery. 
No. 23.—Aged gelding with a chronic case of infectious equine anemia. 
At autopsy on February 17, 1920, there were found about 150 Gaslroph¬ 
ilus spp. and a moderate number of Strongylus and Cylicostomes in the 
cecum and colon. 
Hadwen (7) has noted that the eosinophiles in cases of swamp fever 
(infectious equine anemia) are diminished in number and sometimes 
absent from the peripheral blood. In the cases here reported this is 
noticeable more especially in the acute cases than the chronic ones. 
There is very little, if any, decrease in the number of the eosinophiles in 
some of the more chronic cases. 
In passing, it may well be said that in connection with some parasitic 
anaphylaxis experiments injection of ground up Gastrophilus spp. pro¬ 
duced a marked local eosinophilia with severe abscess development. 
Local injection of ground up Strongylus produced a mild abscess 
