DANGER OF DOMESTIC ANIMALS AND PETS 221 



vision equally with man. Forgetfulness of this principle 

 has over and over again led to the spreading of 

 disease in man. 'J'he question can be grappled with 

 in many ways. It can be dealt with as Sir David 

 Bruce dealt with the goats which he found to be the 

 source of the fever in INIalta, by either banishing them 

 or their products from man altogether ; or, as in the 

 case of diseased swine, by a most rigorous inspection 

 of the swine flesh as is done in Germany ; or, as in the 

 case of the cow, by a most searching examination for 

 the presence of tubercle in the animal. When it can 

 be carried out, the most effective way is the method 

 employed in the case of jNlalta fever. It resembles more 

 closely the method used against the mosquito. 



But whilst the economic domestic animals are a 

 source of danger to man, it must never be forgotten 

 that the domestic pets of man are also a fertile source 

 of disease. For instance, man may be infected with 

 glanders from the horse, but it is more especially 

 against the dog and cat that man must be on his 

 guard. For example, in Iceland the dog is a very 

 necessary help to the Esquimaux for draught purposes, 

 therefore the dogs are numerous and live close to him, 

 in or around the house. A frequent disorder of these 

 dogs is tape-worm disease ; but, living in such close 

 contact with their employer, man, it is not to be 

 wondered at that man should share the disease with 

 the dogs. It thus comes about that the adult tape- 

 worm phase of this disease is passed in the dog, and 

 the cystic or hydatid phase in man. Similarly with 

 rabies : where dogs are abundant and neglected, there 



