Microbic Diseases Individually Considered. 217 



valescence from the severe forms is always prolonged. 

 The receptivity of sheep diminishes with age ; thus, 

 the disease is noticed to be more severe and more fre- 

 quently fatal in young animals. 



The bodies rapidly putrefy ; the subcutaneous and 

 intermuscular connective tissue is dotted with hemor- 

 rhagic points, sometimes with gelatinous exudates. 

 The peritoneum, pleura, and sometimes the peri- 

 cardium may be the seat of fibrinous inflammations. 

 The mucous membrane of the fourth stomach, small 

 and large intestine, is congested; it shows extrava- 

 sated points and sometimes erosions; Peyer's patches 

 are tumefied. The liver is also hyper?emic and dotted 

 with petechias ; sometimes it contains abscesses when 

 the disease has been somewhat prolonged. There are 

 disseminated lesions of broncho-pneumonia with in- 

 filtration and thickening of the interlobular connective 

 tissue septa. The mucous membrane of the bronchi 

 and of the trachea is reddened and thickened, and se- 

 cretes an abnormal quantity of mucus. When the 

 disease has developed slowly, caseous foci are not in- 

 frequently found in the lungs. The lymphatic glands 

 of the mesentery and of the root of the lung are en- 

 larged, congested and infiltrated. 



The micro-organism which produces this disease of 

 the sheep is identical, according to M. Galtier, with 

 that of pneumo-enteritis of the pig. This author 

 claims to have succeeded in transmitting this last dis- 

 ease to the sheep by inoculation, as well as in trans- 

 mitting the disease of the sheep to the rabbit, guinea 

 pig, dog, pig, goat, calf, to solipeds, to the chicken and 

 to the pigeon. In the goat it resembles the pleuro- 

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