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CHAPTER VIII. 



WORMS AND OTHER PARASITES INFESTING THE DOG. 



Natural History of Intestinal Worms Prevention Curative Agents Other 

 Internal Parasites External Parasites Fleas, Ticks, Lice Mange Insect. 



NATURAL HISTORY OF INTESTINAL WORMS. 



SINCE the first edition of ' The Greyhound ' was published, the 

 natural history of intestinal worms has been deeply investigated, 

 arid the labours of Von Siebold and Kiichenmeister have brought 

 to light much that was previously unknown. There still, however, 

 remains a vast field for the observer ; and although the old theory 

 of spontaneous generation is exploded, its place is not supplied 

 so as to^ account for the presence of worms in the newly- 

 born whelp. Yet such cases are recorded on the high authority of 

 Blumenbach, and other equally careful observers, in reference to 

 the tape-worm, while I can myself speak to the existence of the 

 nearly adult round-worm (Ascaris marginata) in the puppy while 

 still blind. No rational explanation has yet been given, as far as 

 I know, of this development of worms in utero ; and certainly the 



