OPISTHORCHIS FEL1NEUS 



2 53 



m. 



p.b. 



ut. 



of Petrograd who had travelled a 

 great deal in Siberia, and finally by 

 Askanazy in five persons who were 

 natives of the East Prussian district of 

 Heydekrug. In Tomsk, Opisthorchis 

 felincus is the most frequent parasite 

 of man that comes under observation 

 at post mortem (6*45 per cent.), whereas 

 Tccnia sagiuata has only been found 

 in 3*2 per cent., Echinococcifs in 2*4 per 

 cent., Ascaris lumbricoides in 1*6 per 

 cent., and Oxyuris vermicularis in o'8 

 per cent, of the autopsies. In the district 

 of Heydekrug, however, the species in 

 question is also frequent, as in a few 

 years five cases came to our knowledge 

 (of which three were diagnosed by the 

 discovery of the eggs in the faeces). 



In none of Winogradoff's nine cases 

 had the death of the patient been caused 

 direct by the parasites, yet more or less 

 extensive changes in the liver were 

 found in all of them; such as dilatation 

 of the bile-ducts with inflammation and 

 thickening of their walls, and foci of 

 inflammation or atrophy in the liver 

 substance ; icterus was present five 

 times and atrophy of the liver an equal 

 number of times ; ascites 

 was observed three times, 

 and in two cases, probably 

 of recent date, the organ 

 was enlarged. The num- 

 ber of parasites found 

 fluctuated between a few 

 and several hundreds. 



In two of Askanazy's 

 cases, which he examined 

 more closely, carcinoma 

 which had developed at 

 the places most invaded by flukes was found at the post-mortem, so 

 that perhaps there may be grounds for the connection which the author 

 seeks to establish between cancer of the liver and the changes induced 

 by the parasites ; these changes consist of numerous and even ramified 



r. s. 



t. 



FIG. 152. 

 Egg of 'Opis- 

 thorchis feli- 

 neus, Riv. 

 830/1. 



ex. p. 



FIG. 153. Opisthorchis felineus : 

 from the cat. m., mouth; /.., 

 pharynx ; z'., gut ; g.p-> genital pore ; 

 ac., ventral sucker ; ut. , uterus ; v.g., 

 vitellarium ; ov., ovary; s.g., shell 

 gland ; r.s., receptaculum seminis ; 

 t. testes ; ex. /., excretory pore. 

 (After Stiles and Hassall.) 



