Dip f era Larva. 273 



the host is usually debilitated and it is fair to attribute this to the 

 irritation caused by the worm. In a weak subject suffering 

 from cutaneous filariasis (Bursatti) a large number were found 

 in the peritoneum (Baruchello). Swelled testicle and dropsical 

 cord are often associated with the presence of filaria in the vaginal 

 tunic (Steel, Pottinger), and the presence of filaria in the scrotum 

 is usually associated with myriads of the same worm in the 

 peritoneum (Macgillivray, Steel, Pottinger). 



No effective treatment has been devised for filariases of the 

 serous membranes. If the presence of the worms could be 

 diagnosed, injection of a weak solution of carbolic acid or other 

 non-irritant vermifuge might be tried. Or one might try the 

 effect of a long course of arsenious acid given by the mouth. 



Anguillula. Rhabdonema. To this class has been ascribed 

 the small worm formerly described as Oxyuris vivipara. Only 

 females have been found 2.5 mm. long by 0.4 to 0.8 mm. thick, 

 sexually mature, and with a few ova, and even embryos in the 

 uterus. 



DIPTERA IvARVA. 



Gastrophilus. The various species of bots (gastrophilus) in 

 passing out of the body have to traverse the intestines and thus 

 in early summer they are temporarily intestinal parasites. Some- 

 times these give rise to more or less irritation by hooking on to 

 the sen.sitive mucosa, and in other cases they assist with the in- 

 gesta in blocking the lumen, and setting up ob.struction and in- 

 digestion. 



For the treatment of such cases see ''parasites of the stomach.'' 

 Helophilus Pendulinus. Rat-tailed maggot. On several 

 occasions the hanging helophilus has been passed by the horse. 

 It is readily recognized by the long, tail-like prolongation from 

 one end of the bot-like body. Its presence has no pathological 

 significance. 



INTESTINAL PARASITES OF CATTLE. 



Actinomycosis of demi-canal, and intestine. Saccharomyces Guttulaius, 

 elliptical cells, with refrangent spots, single, pairs, or chains ; harmless. 

 Aspergillus Fumigatus in pea-like or miliary nodules of small intestine or 

 18 



