174 PARASITES INFESTING THE DOG. 



mucous passages of the dog ; but in the nose Rudolph! met with 

 three cases of the existence of a worm which he classed as Penta- 

 stoma tenioides. The kidney- worm (Strongylus gig as} has, 

 however, been several times found in the kidney of the dog, and 

 is perhaps more frequently the cause of the disease of that organ 

 than is usually supposed. Still its occurrence is rare, and it will 

 seldom be of importance to the courser to ascertain its existence. 

 In appearance it resembles in general form the round worm, and 

 if a worm of somewhat the size and shape of the latter is met with 

 on opening a dog's kidney after death, it may be considered with- 

 out doubt the Strongylus gigas. But as its existence cannot be 

 diagnosed during life, nor could it be removed if ascertained, no 

 description of treatment would be of any avail. 



EXTERNAL PAEASITES. 



The parasites infesting the skin of the dog include the flea, 

 tick, louse, and mange insect; to which may be added several 

 vegetable parasites not accurately made out, and causing diseases 

 of the hair. 



The FLEA is too well known to need description. Its occurrence 

 in large numbers may best be prevented by the use of shavings 

 of red deal, or by sprinkling turpentine upon the litter some little 

 time before it is introduced. To remove fleas when they abound, 



