Lung Worm of the Horse, Ass and Mule. 387 



Williams recommends Scheele's prussic acid : Dose, drops 10 to 

 drops 20 with carbonate of soda and gentian twice a day, in 

 draught. A more uniform strength and greater certainty of re- 

 sult can be secured by substituting potassium cyanide in doses of 

 1 grain in watery solution, which may be injected into the trachea. 

 The deadly nature of the acid and cyanide demands extreme care 

 in its use. A liberal use of onions, garlic or leeks will materially 

 contribute to check the disease. Bronchitic and pneumonic com- 

 plications are to be met by appropriate measures, as in the sheep, 

 and in every case the use of rich feeding with iron and bitters 

 will be desirable. The treatment of intestinal worms is equally 

 important. 



ACTINOMYCOSIS OF LUNGS OF CATTLE. 



See Actinomycosis. 



STRONGYLUS ARNFIELDI. I.UNG WORM OF THE 

 HORSE, ASS AND MULE. 



Worm I to i^ inch long ; caudal membrane of male with ribs bifid, the 

 posterior bilobate ; tail of female a blunt point ; ovoviviparous ; ova ellipti- 

 cal ; embryos with thin diaphanous tail. Host : Bronchia of solipeds. Em- 

 bryos have poor vitality, dying in seven days in pure water, hence worm 

 rarely abundant. Symptoms : Hard or mucous paroxysmal cough, wheez- 

 ing developed by exercise, and expectoration of worms or ova. Prevention 

 and treatm,ent as for lambs and calves, changing the host. Sclerostoma 

 Equinum in vessels of lung. Pneumo-mycosis in Solipeds. 



This is a small, white, filiform worm, of nearly the same size as 

 the strongylus ruf esceus ; Male i inch ; female i }^ to nearly 2 

 inches long. The mouth, terminal, round or ovoid, is devoid of 

 papillae. The caudal membrane of the male is short and slightly 

 festooned, with the anterior rays bifid, the forward branch being 

 the shorter, the middle rays bifid with branches equal in length 

 and the posterior rays bilobate at the ends. Two spicula, equal 

 arched, reticulated and a third small spiculum. Tail of female 

 .slightly curved and attenuated, but ends in a blunt point. Vulva 

 in front of the posterior fifth of the body. Ovoviviparous. Ova 

 elliptical. Embryos 450 /t with thin diaphanous prolongation. 



Habitat. Bronchia of solipeds — horse, ass, and mule. 



