Robert Koch (1843-1910) was a celebrated German physician, 

 noted as the discoverer of the bacilli of tuberculosis and of cholera. 



In 1882 he announced in Berlin the discovery of the tubercle 

 bacillus, and the same year he published a method of preventive 

 inoculation against anthrax. Later he discovered tuberculin, a 

 substance intended to check the growth of the tubercle bacillus. 



In 1883, Koch led the German expedition to India to investi- 

 gate cholera, and discovered the cholera germ. In 1885 he be- 

 came Professor of Medicine at Berlin and in 1891 Director of the 

 new Institute for Infectious Diseases. 



