POROCEPHALUS 351 



nostrils of pythons into water, and that infection occurs through 

 drinking. The return of the larva from the intermediate host 

 to the python probably takes place by the intermediate host 

 being eaten. The larvae as they occur in man or other animals 

 may either be encysted or freely migrating in the tissues or body 

 cavities. Such symptoms as emaciation, bronchitis, pleurisy and 

 offensive discharges from the lungs may be present. From 75 

 to 100 larvae have been known to be expectorated by a single 

 patient. 



A more slender species, P. moniliformis, bright yellow in color, 

 occurs as an adult in pythons in southern Asia and the East 

 Indies, and in two cases human infection has been reported. 

 One case of human infection with a Porocephalus in Montana in 

 1876 is of interest, since, as pointed out by Sambon, it may have 

 been the larva of P. crotali of rattlesnakes. 



