The Eggs and Larvae of Poultry 
Parasites 
HE eggs of most of the flukes occurring in poultry are of the 
usual elliptical shape and provided with an operculum at one 
end. Some of the egg sizes in microns are as follows: Typhlocoelum 
obovale (duck; trachea, bronchi, lungs, etc.), 154 to 180 by 90; Trache- 
ophilus sisowi (duck; air passages of lungs), 122 by 63; Opisthorchis 
simulans (duck; biliary canals), 28 by 16 to 18; Metorchis xanthosomus 
(duck; biliary canals), 27 to 32 by 14; Echinostoma revolutum (duck, 
Fig. 48. Echinostoma revolutum. Eggs in various stages of development, x 34. 
From Johnson, 1920. 
goose, swan, chicken; intestine; U. S.), 94 to 114 (Fig. 48); E. recur- 
vatum (duck, chicken; intestine), 110 by 80; Hypoderaeum conoideum 
(duck, goose, chicken; intestine), 95 to 108 by 61 to 68; Prosthogonimus 
49 
