Lifespan of Cattle and Horses 63 



per cent of the animals were sterile ; the authors pointed out 

 that this is due to genital tuberculosis as well as to Bang's 

 disease, which causes most of the sterility. Secondly, 12-79 

 per cent of them had tuberculosis (udder tuberculosis included). 

 Thirdly, inflammation of the udder accounted for 7-89 per 

 cent. The remaining 115 animals died from various other 

 diseases, such as cancer of the lungs and cardiac weakness. 



Dinkhauser's (1940) investigations in Lower Saxony showed 

 that 23 per cent of all cattle had to be culled because of steril- 

 ity. From research in the Central-German dry region Marlow 

 (1951) succeeded in showing that softening of the bone was the 

 most important cause of death. In his researches on cattle 

 from smaller farms in Baden, Gerner (1952) obtained the 

 following results: 



Other diseases here means those that are specially connected 

 with the sexual organs, such as dropping of the womb and 

 emergency slaughtering at calving. Piel and Rumbaur (1948) 

 studied the causes of death in first-class brown cattle in 

 Wurtemberg. They obtained the following results : 



