496 



arrested in from five to ten days and a rapid recovery takes place. 

 While the diarrhea complication is a serious one, and may greatly 

 weaken the animal, it rarely becomes so intense as to assume the name 

 of dysentery, and it rarely becomes hemorrhagic; it is rather a diar- 

 rhea of anaemia. An enteritis takes place in an animal weakened by 

 the previous action of the disease, and there is not sufficient vitality 

 of the organ itself to resist the inflammation, but this is a superficial 

 inflammation, with destruction only of the tissue of the surface of 

 the intestines, which allows a rapid healing. Rapid recovery takes 

 place, and the promptitude with which the intestines can commence to 

 digest and assimilate food when the diarrhea is checked is frequently 

 surprising. 



Complication of the Jungs. — If at any time during the course of the 

 fever the animal is exposed to cold or draughts of air, or in any other 

 way to the causes of repercussion, the lungs may be affected. In the 

 majority of cases, however, after three, four, or five days of the fever, 

 the congestion of the lungs commences without any exposure or appar- 

 ent exciting cause. This is due to the alteration of the blood, which 

 allows a more easy osmosis of the blood into the surrounding tissues 

 and to the checking of the capillary blood vessels, produced by the 

 increased rapidity and force of the circulation. Unless this conges- 

 tion of the lungs is relieved at once it is followed by an inflammatory 

 product, a fibrinous pneumonia. This pneumonia, while it is in its 

 essence the same, differs from an ordinary pneumonia at the com- 

 mencement by an insidious course. The animal commences to breathe 

 heavily, which becomes distinctly visible in the heaving of the flanks, 

 the dilation of the nostrils, and frequently in the swaying movement 

 of the unsteady body. The respirations increase in number, wiiat 

 little appetite remains is lost, the temperature increases one to two 

 degrees, the pulse becomes more rapid, and at times, for a short period, 

 more tense and full, but the previous poisoning of the specific disease 

 has so weakened the tissues that it never becomes the characteristic 

 full, tense pulse of a simple pneumonia. 



On percussion of the chest dullness is found over the inflamed areas; 

 on auscultation at the base of the neck over the trachea a tubular 

 murmur is heard. The crepitant rales and tubular murmurs of pneu- 

 monia are heard on the sides of the chest if the pneumonia is periph- 

 eral, but in pneumonia complicating influenza the inflamed iwrtions 

 are frequently disseminated in islands of variable size and are some- 

 times deep seated, in which case the characteristic auscultory symptoms 

 are sometimes wanting. From this time on the symptoms of the ani- 

 mal are those of an ordinary grave pneumonia, rendered more severe 

 by occurring in a debilitated animal. After resolution, however, and 

 absorption into the lungs convalescence is rapid, and recovery takes 

 place perhaps more quickly than it does in the simple form of the dis- 

 ease. There is a cough, at first hacky and aborted, later more full 



