PARASITES IN THE PHARYNX 93 



do much good. Subcutaneous injections of nerve tonics 

 (strychnin nitrate gr. J-J once daily) are recommended. 

 While the patient is unable to swallow it should be fed through 

 a stomach-tube. Obviously animals suffering from rabies 

 should be destroyed. 



PARASITES IN THE PHARYNX. 



Larvae of the bot flies (Gastrophilus equi and G. haemor- 

 rhoidalis) sometimes are found attached to the upper wall 

 of the pharynx. In rare instances they have been known 

 to induce severe pharyngitis, or by entering the larynx, 

 suffocation. 



Horse leeches (Hsemopis sangui suga) affect horses and 

 mules in southern countries. They attach themselves to 

 the wall of the pharynx and suck blood. Their presence is 

 suspected from nasal and buccal hemorrhage which they 

 occasionally induce. Large numbers may cause fatal loss 

 of blood or serious anemia. The treatment usually advised 

 is to irrigate the throat with salt and vinegar or creolin 

 (2 per cent.). Inhalation of turpentine or ammonia fumes 

 is also useful. Prevention consists in filtering the drinking 

 water. 



Hungarian flies (Simulia columbacoeusis) attack Hungarian 

 cattle and sometimes reach the pharynx through the mouth 

 and nose. Occasionally they produce serious pharyngo- 

 laryngitis, leading to suffocation. 



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