INCIDENTAL AILMENTS 



nose, redness of the eyes, a cough, prostration, 

 with a special liability to attack important 

 organs. The virus may be regarded as both 

 " fixed " and " volatile," so that if this theory 

 is correct, the malady is capable of being trans- 

 mitted, not only through the medium of the 

 nasal discharge, but also by means of the 

 atmosphere. When an infected animal is intro- 

 duced into a stud of previously healthy ones, 

 the malady usually extends to other members of 

 the stud. Neither age, sex, nor good condition 

 seem to exercise much influence over the 

 spread of the disease, but whenever the con- 

 stitution has been lowered by debilitating 

 extrinsic forces, such an animal must be re- 

 garded as predisposed to contract the trouble. 

 One attack does not confer immunity — in fact, 

 it is questionable whether it has the slightest 

 influence over succeeding ones, diflering in this 

 respect from strangles. The premonitory signs 

 of influenza are indicated by rigors or shivering 

 fits, by lassitude, injection of the visible mucous 

 membranes, accompanied by dryness of the 

 same. These signs are soon followed by 

 nasal discharge, watery at first, subsequently 



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