316 A MANUAL OF BACTERIOLOGY 



set up a general tuberculosis. Certain human viruses, 

 differing in certain respects from those of Groups I and 

 II, were also met with and are classed as Group III, but 

 an opinion on their significance is reserved for a future 

 report. 



The Commissioners conclude that the tubercle bacillus 

 in its nutritive and reproductive powers resembles other 

 simple organisms, and that the essential difference between 

 one strain and another depends on variations in these 

 factors, and they classify those bacilli that grow with 

 difficulty on artificial media as dysgonic, and those that 

 grow readily on media as eugonic. 



As regards the histological appearances of the tuber- 

 culous process in different animals, Eastwood states that 

 there is an underlying unity of the morbid processes 

 produced experimentally by infection with every variety 

 of bovine and human tubercle bacillus. 



In their final Report, the Commissioners conclude that 

 an appreciable amount of human tuberculosis is caused 

 by bacilli of the bovine type, and that tuberculosis may be 

 communicated to man from infected cow's milk, and from 

 tuberculous meat, either beef or pork. 



So far, therefore, from any relaxation of the existing 

 supervision of milk-production and meat-preparation being 

 possible, the Commissioners press upon the Government 

 the enforcement of food regulations, " planned to afford 

 better security against the infection of human beings 

 through the medium of articles of diet derived from tuber- 

 culous animals." More particularly they urge such action 

 " in order to avert or minimise the present danger arising 

 from the consumption of infected milk." 



Of young children who died of wasting disease of the 

 intestine, the bovine bacillus was present in nearly half 

 the cases. Further, a large proportion of cases of tuber- 

 culous cervical glands in both children and adults was 



