1 1)5 



cuiosis of tlie hig'lit'i- aiiinial«, mid altluMi^li these are 

 similai- it is caused by a soniewliat dili'eieut germ, and' 

 it is not probable that it is ever acquired from the 

 higher animals nor that the higher auimals can acquire 

 tuberculosis from fowls. The principal symptoms o-f 

 tuberculosis are 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 gradualh' lost and finally it 

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

 skin and feathers. 



After death, little white or yellow tubercles which 

 contain cheesy 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 cases in the peritoneum, the 

 membrane lining the abdominal cavity, and in the 

 lungs. Many of the birds in Zo-ological 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. Tuberculosis of ])arrC'ts differs somewhat 

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

 germ identical with that causing tuberculosis of man, 

 and may be derived from or transmitted to people. So 

 that tuberculous parrots are a menace to human 

 health. 



There is no cure for tuberculosis, and the most effi 

 cient means of {)reventing it r-onsists in killing and 

 burniiii:' fovls that nia\' Itc sntTci-ini; with it .hkI tlinr 



