78 PARASITES OF MAN 



viously referred to was situated close to the huts of the camel 

 drivers. These men are all Mussulmans from Cabul, Peshawur, 

 or thereabouts, and many of them are infected with Tcenia 

 mediocanellata. Human filth was often to be seen on the 

 banks of the tank, and microscopic examination of mud and 

 stagnant water taken from the margin exhibited Taema ova. 



t The conditions above shown must have been eminently 

 favorable to keeping up a constant supply of ova, and the fact 

 that Cysticercus entirely disappeared from amongst the cattle a 

 few months after means had been taken to secure them a good 

 supply of well water, seems to confirm the view that this tank 

 must have been the source of a large amount of, if not all, the 

 infection. 



"It has been suggested that Cysticercus can be detected 

 before the animal is killed by an" examination of the tongue. 

 In exceptionably severe instances this is probably correct, bnt 

 then it would be equally observable in some other parts of the 

 body. Major Biggs, Commissariat Officer here, tells me of an 

 animal he saw at Rawul Pindee, in which immense clusters of 

 cysts could be felt at the root of the tongue and under the 

 skin in several parts. After examining a very large number of 

 tongues of ' cysted J animals, my experience is that it is found in 

 the soft muscles and cellular tissues at the root of the tongue, 

 perhaps more frequently than anywhere else ; but I have never 

 seen a case in which there was a chance of detecting it before 

 death. 



te The most common situations in which it has occurred in 

 the ration meat have been the gluteal, psoas, and lumbar 

 regions. In many instances only from one to ten cysts have 

 been found on cutting the carcase into small pieces, and I have 

 no doubt that it often passed without detection. 



" During 1868 and 1869 I from time to time obtained pieces 

 of beef badly infected with Cysticercus, and made some experi- 

 ments as to the results of its consumption under different con- 

 ditions. 



" After explaining to them the possible consequences of 

 eating it. a buttock of beef studded with Cysticercus was given 

 to three natives of low caste. They all declared that they were 

 free from Tania, or, to use their own term, " Kadhu dana." 

 The meat they cooked in their own way. These men were 

 under my observation for some six months. Two of them had 

 no symptom of Tania, but the third, who was a low- class 



