448 Veterinary Medicine. 



The subsequent treatment is by antiseptic collyria (mercuric 

 chloride 1:5000) as in other cases of puncture of the cornea. 



Grellier claims that he destroyed the worm by mercurial appli- 

 cations to the eye, and Skeavington by a course of alteratives. 

 These may be more effective if the worm is already approaching 

 the limit of its existence. When the. worm dies in this way it may 

 be dissolved and completely absorbed in four or five weeks. An 

 early operation is however to be recommended as obviating the 

 risk of permanent opacities and other changes destructive of vision. 



Filaria Oculi Bovina. Filaria Cervina. Filaria Tere- 

 bra. Filaria Labiato-papillosa. As in the case of the filaria 

 oculi equina the identity of this worm is uncertain. It is, how- 

 ever, considered by Neumann and Railliet that it is the young 

 form of the filaria of the serous membranes of the same animals, 

 and which is also found in those of the deer and reindeer. 



A worm in the aqueous humor of the ox was observed by Gris- 

 oni as early as 1429 but it does not seem to have been again ob- 

 served until 1812 by Degouilleme. Later it has been noticed by 

 a number of observers including Santin, Chaignaud, Roche I,u- 

 bin, Anceze, Cruzel, etc., mainly in France and Italy. 



Causes. lyike filaria oculi equina, it has been found especially 

 in connection with damp localities, wet seasons and inundations, 

 and its prevalence has appeared to diminish in connection with 

 the encrease of land drainage, the cultivated forage, a richer di- 

 etary and better .stabling. It has shown itself to be rigidly con- 

 fined to certain infested districts, as in France, to the valley of 

 the Garonne. Claes and Brouwier record a local epizootic in 

 Belgium which was followed by bronchial strongylosis. Season 

 appears to exercise a marked influence, thus Chaignaud who re- 

 cords over one hundred and fifty cases, found them only from 

 June to November. Faure, however, .saw a case in April, and 

 Durechon and Roche Lubin, others in March. 



Symptoms. As in the horse the usual result is an ophthalmia 

 of variable intensity, yet the cornea commonly retains a sufficient 

 translucency to allow the worm and its movements to be detected 

 in a good light, as at a door or window. In some cases there is 

 little inflammation and the discharge of tears is the only promi- 

 nent symptom to draw special attention to the eye. 



The affected eye may contain but a single worm, but in excep- 



