78 



POULTRY DISEASES AND THEIR TREATMENT. 



to do is to send a portion of the intestine containing the worms 

 to the Zoological Division, Bureau of Animal Industry, U. S. 

 Department of Agriculture, Washington, D. C. In this way 

 the worms will be identified and any specific remedies will be 

 recommended. 



Nodular Tceniasis. 

 Stiles says, p. 15: "At least one species of tape worm (Da- 

 vainea tetragona) causes a serious nodular disease of the intes- 

 tine of chickens which upon superficial examination may be 

 easily mistaken for tuberculosis." Moore says (Bur. An. Ind. 

 Circ. No. 3, 1895) : 



"Tuberculosis is the only known disease 

 for which this affection is liable to be mis- 

 taken, and it is of much importance that 

 the two diseases should not be confounded. 

 The diagnosis has not in my experience 

 been difficult, as in every case the attached 

 tape worms were readily detected upon a 

 close examination of the intestinal con- 

 tents, or of the mucous membrane of the 

 infected portion of the intestine. How- 

 ever, the worms are quite small and could 

 easily be overlooked in a hurried or cursory 

 examination. In case of doubt, if the af- 

 fected intestine is opened and the mucous 

 surface washed carefully in a gentle stream 

 of water, the small worms will be observed 

 hanging to the mucous membrane. This 

 discovery, in the absence of lesions in the 

 liver or other organs, would warrant the 

 diagnosis of the tape worm disease." 



Diagnosis. — The symptoms of tape worm 

 disease are not specific. The general symp- 

 toms are similar to those of other worms 

 (cf. p. 75). Regarding the symptoms of 

 tape worms Stiles quotes the following 

 from Ziirn : "If numerous tape worms are 

 present in the intestine of young or old 

 fowls a more or less extensive intestinal 

 catarrh develops, ^ corresponding to the 

 greater or less number of parasites present." 



Fi 



Intestine of 

 a fowl tui'ned 

 v/rong side out to 

 show tape worms 

 in nodular tae- 

 niasis. After 

 Pearson and War- 

 ren). 



