The eggs of the kidney worm of swine, Stepiianurus dentatus 
(Fig. 23), are elliptical, 100 to 120 microns long by 55 to 56 microns 
wide, thin-shelled, and segmenting when deposited. These eggs pass 
Fig. 25. Strongyloides stercoralis. Rhabditiform larva from fresh feces, x 310. 
From Stephens, 1916, after Looss. 
out in the urine, but may be found in the feces as a result of mixing 
urine and feces. 
The eggs of the small red stomach worm of swine, Hyostron- 
gylus rubidus (Strongylus rubidus) are elliptical, 45 microns long by 
36 microns wide, and segmenting when deposited. 
Fig. 26. Strongyloides stercoralis. Mature filariform larva, x 620. 
From Stephens, 1916, after Looss. 
An interesting nematode of swine which has not yet been reported 
from the United States is Gnathostoma hispidum. The eggs (Fig. 24) 
are 70 to 74 microns long by 39 to 42 microns wide, the shell marked 
with small depressions and with a wart-like projection or plug at 
one pole; segmentation begins in the anterior portion of the maternal 
uterus. 
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