LXY. 

 PARASITES INFECTING THE DOG. 



ASCARIS MARGINATA. 



This worm, a frequent source of sickness, is the most common 

 in the dog. The male is three inches long, the female four to six 

 inches. 



Symptoms. — Irregularity of the bowels, voracious appetite, 

 colic, loss of flesh. The worm sometimes finds its way into the 

 trachea, and when such is the case the animal has a persistent 

 cough. The parasite reaches the trachea through the oesophagus. 

 They have been known to find their way into the nasal cavity and 

 produce obstinate sneezing. There may be partial paralysis. 



Treatment. — Santonin, in three to five grain doses, mixed 

 with castor oil, may be given on an empty stomach every morn- 

 ing for three or four days. This treatment should be followed 

 with a good purgative. Then give tonics — gentian, quassia, and 

 sulphate of iron, each five grains. 



ASCARIDE. 



The ascarides are small, thread-like worms, generally not more 

 than six or ten inches in length. They are white in color, the 

 head obtuse, and the tail terminating in a transparent prolonga- 

 tion. They are principally found in the rectum; they seem to 

 possess considerable agility, and the itching caused by them is 

 intense. The dog often drags the fundament along the ground 

 to relieve this itching. The wonns roll themselves in a ball as 

 large as a nut, and it is difficult to disentangle them. When in 

 the stomach they are not removed by vomiting. Young dogs are 

 subject to and are with great difficulty entirely freed from them. 



The treatment of this worm is similar to the treatment of 

 ascaries marginata. 



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