ANIMAL PARASITES OF THE THROAT. 257 



Amoebae and flagellates have been reported from the mouth. 

 Also in the remarkable disease "halzoun," flukes have been found to 

 be the cause of the asphyxia. 



In the tropics, round worms may be vomited up and, lodging in the 

 pharynx, may have to be extracted. 



