PARASITES INHABITING SEROUS MEMBRANES 113 
Many practitioners prefer olive-oil to glycerin. The 
injection should be repeated in a week. 
A modification is to trickle 1 drachm of the following 
mixture down the nostrils : 
Turpentine .. me tg +. 1 part 
Ether .. a = ee -. 30 parts. 
This method is not to be recommended. 
PARASITES INHABITING SEROUS MEMBRANES. 
Among these must be included the cystic forms of 
several tapeworms already mentioned. Especially we 
may mention : 
1. Cysticercus Bailleti-—This is the cystic form of a 
Bothriocephalus, and is found in the peritoneum, in 
the pleura, or other serous membranes of the dog, cat, 
and some other small animals. The cyst is formed of 
an invaginated head without hooks, but having four 
suckers, with an elongated body tapering at the posterior 
end. The body is full of calcareous particles. 
The whole length is from 1 centimetre to 2 centimetres. 
The parasite is contained in the interior of a cyst, and 
it is probable that it reaches the serous membranes 
from the alimentary tract by means of the blood-stream, 
as it is usually found in close proximity to bloodvessels. 
2. Filaria Papillosa (Filaria Equina).—A white, thread- 
like worm, tapering at each end. Male, 6 centimetres to 
8 centimetres; female, 10 centimetres to I5 centi- 
metres. Mouth bears eight papille. Tail spirally 
twisted. Ovoviviparous. 
This worm may be found within the scrotum of 
horses during castration, especially in cases of hydrocele 
and adhesions between the testis and scrotum, which 
symptoms may be set up as a result of its presence. It 
is commonest in India, but has been observed in Great 
Britain. 
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