66 AIDS TO BACTERIOLOGY 



In the German Freibanks, after removal of tubercular 

 areas, the meat is sterilised, and then stamped and sold 

 as inferior. It has been shown that the tubercle bacillus 

 is not destroyed, if in the centre of a joint of meat 

 over 6 pounds in weight, by the ordinary method of 

 cooking. 



The Local Government Board has ordered that ' strip- 

 ping ' (removal of ' skin ' from inside of the ribs or flanks, 

 with a view to effacing signs of the disease), in the case 

 of foreign dead meat, shall be sufficient reason for con- 

 demnation. It must not be overlooked that, after re- 

 moving tubercular organs, a butcher may use the same 

 knife for cutting up a carcass, and thus infect healthy 

 meat. 



Tuberculosis is rare in new-born calves, and, if removed 

 from a tubercular mother at birth and properly treated, 

 they will not, as a rule, develop the disease. In Bang^s 

 method for eliminating tuberculosis, the herd is tested 

 with tuberculin, those that react or which are suspicious 

 being isolated. The herd is divided into two sections, 

 which are separated from one another, and have separate 

 attendants and separate buildings; they are, however, 

 allowed to mix when out in the fields. Every six months 

 the healthy side is tested with tuberculin, and any beasts 

 that are found to react are placed on the infected side, 

 while all calves are placed on the healthy side. The 

 animals on the tuberculous side which are obviously tuber- 

 culous are got rid of, but those that are apparently healthy 

 are used for breeding. Ostertag's method consists in the 

 elimination of cows suffering from ' open ' tuberculosis 

 (i.e., where there are open tuberculous lesions in organs 

 with means of external communication, such as in the 

 udder, lungs, intestines, and urino-genital organs) from 

 the others. 



Avian Tuberculosis. Fowls, pheasants, turkeys, and 

 pigeons suffer from the disease, which attains an extra- 

 ordinary virulence in insanitary fowl-houses. Ducks and 

 geese are immune. Whereas growth of the human bacillus 

 ceases at 41 C., the avian organism grows well at 43 C. 

 Its cultures on solid media are softer, more greasy, and 

 less tightly packed than those of human tuberculosis. 

 The rabbit is readily infected with it, mice, horses and 

 swine are susceptible, while the guinea-pig shows much 



