338 



Foot-and-Mouth Disease. 



wall, ill otlicr parts however the walls are thinner. These con- 

 tain first a clear, watery, colorless or yellowish flnid, which later 

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

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

 their places liig'hly reddened, moist, painful, flat erosions with 

 wide borders remain. After 1 to 2 days these become covcn'cd 

 with fresh epithelium, whereupon for a certain time yellowish- 



rig. 58. Foul-diul-iituiilh disrasc. Sub- Fig. 59. Foot-diid-moiifh (llscasr. Ero- 



epftlu'lial vesick's on the point of tlio sions on the dorsum of tlic tongue in 

 tongue, on the l)ody of tlio tongue, and on stages of early liealing. 



the thick jwrtion. 



brown spots remain, which finally also disappear {Fiij;. 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. 



Tn Hiiiinals which were in poor condition previous to the affection, 

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



