84 



POULTRY DISEASES AND THEIR TREATMENT. 



Regarding these parasites in 

 poultry, Theobald (Parasitic 

 Diseases of Poultry, London) 

 says : "The Trematode worms 

 or Flukes found in the fowl are 

 3 in number. One is found in 

 the egg (Distoma ovatum), the 

 others in the oesophagus and in- 

 testines." 



"The Fluke found in the oeso- 

 phagus of the fowl is known as 

 Cephalogonimus pellucidus, a 

 transparent reddish fluke about 

 9 mm. long. These were found 

 by Von Linstow and Railliet. 

 In the intestines Neumann enu- 

 merates 7 species, namely, Noto- 

 cotyle triscrialis Distome oxyce- 

 phalum, Rud., D. dilatatum, 

 Miriam, D. lineare, Zeder, D. 

 ovatum, D. armaUim, Molin, and 

 Mesogonimus commutatus, Sons. 

 These, however, are not all dis- 

 tinct; dilatatum is undoubtedly 

 the same as oxycephalum; arma- 

 tum is also probably the same." 

 "None of these Trematode worms are of any pathological im- 

 portance, although, as is well known, they often cause serious 

 maladies in other animals. All the Flukes that have two hosts 

 undergo a complicated metamorphosis, the early stages always 

 taking place in some water-molluse. Those found in Gallus do- 

 mestic us have not had their life-histories worked out." 



Fig. II. Trematode worm or 

 fluke showing internal 

 structure. (From Thomp- 

 son after Sommer). 



