146 ENTOZOA FOUND IN MAN. 



liver, be effused into a cyst which is in relation at one 

 part with the biliary canals, and at another part with 

 the veins, and in this manner the blood may become 

 indirectly charged with bile. 



The cases wliich have been placed upon record 

 are sufficient to show that the communication of a 

 hydatid cyst with the veins may give rise to the 

 phenomena of phlebitis, of purulent infection of the 

 blood, of pneumonia, and perhaps also of pulmonary 

 gangrene, and of different acute affections of various 

 organs which are situated at a distance from the 

 primary lesion, and which are secondarily affected as 

 a result of the deterioration or poisonmg of the 

 blood. 



According to Dr. Davaine, the communication of 

 the blood-vessels with hydatid cysts is not of in- 

 frequent occurrence ; and the numerous interesting 

 cases which he has collected tend to establish the 

 correctness of his opinion. 



Chapter XX. 



HYDATIDS WHICH AEE IN EELATION WITH THE 

 OEGANS OF EESPIRATION. 



The hydatids which are in relation with the respira- 

 tory organs are either developed within the thoracic 

 cavity itself, or else are developed first within the 

 abdomen, and afterwards invade the chest in con- 

 sequence of their great increase in size. 



