266 



DISEASES DUE TO HELMINTHS 



The parasite is 4 to 10 metres long by 4*7 mm. broad. 

 There are four hemispherical suckers, often pigmented, 

 sucker instead of a rostellum. 



The proglottides number about 1,000. 



The genital pore is lateral and placed irregularly. 



It has a 



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Vsc. 



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Pfoglotlis of Tania saginala, Goeze, showing genitalia. C, transverse 

 excretory canal; N., lateral longitudinal nerve; IV., longitudinal excretory 

 canal; T., testicles scattered throughout the proglottis; Ut., opposite the central 

 uterine stem (a closed sac) ; Ss., genital pore leading into the genital sinus ; above 

 the cirrus and coiled vas deferens (V.d.), below the vagina {Vag.), bearing near 

 its termination a dilatation, the seminal receptacle ; Vsc, the triangular vilel- 

 larium, and above it (Skg.) the shell gland ; leading from this to the uterus is seen 

 the short uterine canal, on either side of this the twolobed ovary [Ov.). lo/i. 



Egg of Diplogonoporiis graiidis, 

 showing the morula surrounded by 

 yolk cells and granules. 440/1. 

 (After Kurimoto.) 



Uterine 



Uterine 



shell with filaments ; the oncosphere with embryo- 

 nal shell (embryophore) in the centre. 500/ 1. 

 (After Leuckart.) 



Cattle take up the embryophore in contaminated food or water 

 which then develops in their muscles as the Cysticercus bovis. 



The muscles of the tongue and of mastication are chiefly affected. 

 Man is infected by eating insufficiently cooked infected meat. 

 The cystic stage is very rare in man. 



