438 



THE TUBERCLE BACILLUS GROUP 



Tubercle bacilli also enter the intestinal tract and they may pass 

 through the intestinal mucosa without leaving any trace of their 

 passage, particularly if they be suspended in fatty menstrua, as butter 

 or cream. 1 The bovine type of the tubercle bacillus may enter through 

 the tonsils, or the digestive tract occasionally. Rarely, tubercle bacilli 

 enter through the skin, usually causing somewhat localized epidermal 

 proliferations containing tubercle bacilli in small numbers, which 

 are sometimes called butcher's warts, postmortem warts or verruca 

 necrogenica. Usually they remain localized. 



COMBINED TABULATION, CASES REPORTED AND OWN SERIES OF 

 CASES. (PARK AND KRUMWIEDE.) 



Mixed or double infections, 4 cases. 

 Total cases, 1042. 



For some years much discussion has centred upon the incidence of 

 bovine tubercle bacillus infection in man. Koch was inclined to the 

 view that infection with this organism was so rare as to be practically 

 negligible. Later he modified his opinion. Weber 2 studied 628 cases 



1 Nicolas and Descos, Jour. Physiol. et Path, gen., 1902, iv, 910; Ravcnel, Jour. Med. 

 Research, 1903, x, 460. 



2 Tuberkulose, Arbeiten a. d. kais. Gesamte, 1910, Heft x. 



