11)5 



culosis of the hig'lu'r animals, and allhiHigh tliese ai'f 

 similar it is caused bv a somewhat difl'ereut germ, axid 

 it is not pi-obable that it is ever acquired from the 

 higher aiiimals nor that the higher animals can acquire 

 tuberculosis from fowls. The principal symptoms of 

 tuberculosis art- those of a lingering illness that grad 

 ually becomes more severe. Sometimes, tubercles ap 

 pear as hard and horny or as soft and cheesy swellings 

 on the skin or about the joints. There is wasting, the 

 comb and the membranes, of the head become pale, the 

 strength of the fowl is gradually los't and finally it 

 dies, after having shrunken to a mere mass of bones, 

 skin and feathers. 



After death, little white or yellow tubercles wWch 

 contain chctsy matter may be found in the liver and 

 spleen. About half of the fatal cases of tuberculosis 

 in birds show tubercles, which appear as rather dense 

 round masses, in the walls of intestine. They may 

 also be found in some ca.ses in the peritoneum, the 

 membrane lining the abdominal cavity, and in the 

 lungs. Many of the birds in Zoological Gardens die 

 of tuberculosis, and it is very common among cage 

 birds. A number of cases in parrots have been seen 

 at the Veterinary Hospital of the University of Penn 

 sylvania. Tuberculceis of ))arrots differs somewhat 

 from th.it of chickens, in that it may be caused by a 

 germ identical ^\ith that causing tuberculosis of man. 

 and may be derived from or transmitted to people. So 

 that tultercnlous parrots are a nK^nnce to human 

 health. 



Tliere is no cure for tiibi-i-ciilosis. and the most efli 

 (■ieii( means of jiicventiii'; il consisls in killing ntid 



