338 



Poot-and-Moutli Disease. 



wall, in other parts however the walls are thinner. These con- 

 tain first a clear, watery, colorless or yellowish €[uid, which later 

 becomes cloudy and grayish-white. After 1 to 3 days the vesi- 

 cles burst, the contents escape, the wall is thrown off, and in 

 their places highly reddened, moist, painful, flat erosions with 

 wide borders remain. After 1 to 2 days these become covered 

 with fresh epithelium, whereupon for a certain time yellowish- 



Fig. 58. Foot-and-mouth disease. Sub- 

 epithelial vesicles on the point of the 

 tongue, on the body of the tongue, and on 

 the thick portion. 



Fig. 59. Foot-and-mouth disease. Ero- 

 sions on the dorsum of the tongue in 

 stages of early healing. 



brown spots remain, which finally also disappear (Fig. 59). As 

 soon as the erosions become covered by epithelium the animals, 

 which in the meanwhile frequently have become greatly ema- 

 ciated, commence to eat. 



In animals which were in poor condition previous to the affection, 

 sometimes a lemon-colored deposit of 3 to 4 mm. thickness develops at 



