360 NODULAR TAENIASIS IN FOWLS 



cinal remedy must, therefore, be one which will remove them. 

 It is possible that such a remedy may eventually be found, but 

 at present it is not known. It is possible that some of the 

 more reliable remedies advised for other intestinal parasites 

 will do for these. The killing of the adults will of course 

 lesson the number of eggs with which the sheep become 

 infested. As the eggs pass to the ground the sheep may get 

 them either while grazing or in their drinking water. The 

 same care in changing pastures, in providing good drinking 

 water and a plentiful supply of salt, should be observed as for 

 the prevention of other parasites. Judicious fall and winter 

 marketing of infested sheep will also tend to lesson the chances- 

 of additional infection. If pasturesare known to be perma- 

 nently infested, the}' should not be used for sheep. 



§ 284. Nodular intestinal disease of cattle. Cattle 

 suffer from a like parasitism, but from a different species of 

 OesopagostaDia. In the bovine species the nodules are, as in 

 sheep, more conspicuous from the serous surface of the intes- 

 tine than from the mucosa. They are important in that fre- 

 quently they have been diagnosed as nodules of tuberculosis. 

 As their structure is quite like those in sheep, the differential 

 diagnosis can be easily made. If there is doubt, serial .sec- 

 tions of a small nodule will usually reveal the presence of the 

 worm. In cattle the oesophagostoma nodules do not appear to 

 be of much if any importance in the animal economy. 



REFERENCES. 



Curtice. The nodular disease of the intestines of sheep. Animal 

 Parasites of Sheep. U. S. Bureau of Animal Industry. 1890. p. 165. 



NODUIvAR TAENIASIS IN FOWLS. 



S 285. Characterization. Nodular taenia.sis in fowls is 

 a disease of the intestines characterized by nodules varying in 

 size from that of a pinhead to a small pea situated either 

 beneath the mucosa, within the muscular walls or in the sub- 

 serous tissue. It is caused by a small cestode. 



