BACILLUS OF MORGAN 77 



not enough that we find the microbe in cases of colitis, as there 

 is nothing to prove that the intestinal flora may not alter consid- 

 erably under the pathological conditions that take place in the 

 intestines under a severe attack of colitis. 



If there be pathogenic as well as non pathogenic specimens 

 of this microbe we have owing to Christiansen 's work on the colon 

 bacilli no methods of detecting the pathogenic ones except the 

 direct experiment as to pathogenicity. As the pathogenic colon 

 bacilli show a high degree of diarrhoea producing effect in young 

 calves, it is not unlikely that calves would be the best object 

 for experiments as to the pathogenic action of the metacolon 

 organisms. Such experiments have never been carried out, and 

 for the time being there is nothing to prove that the metacolon 

 organism is more than a saprophytic colon bacillus, that thrives 

 especially well in an inflamed intestine. 



REFERENCES 



Bahr and £)hrum: Meddelelser fra det Kgl. Veterinar og landbosiskoles serum- 



laboratorium, Nr. 5. 

 Bahr and Thomsen: Meddelelser fra det Kgl. Veterinar og landbosiskoles 



serum-laboratorium, Nr. 19. 

 Bang 1917 Meddelelser fra Statens seruminstitut, Kobenjavn. 

 Christiansen, M. : Memoires de l'Academie royale des Sciences et des Lettres 



de Danemark, Section des sciences, 8 serie, 1, Nr. 3. 

 d'Herelle 1917 Bull, de l'academie de medicine, Nr. 47. 

 Jungmann and Neisser 1917 Med. Klinik, Nr. 5. 

 Kindberg 1917 Berliner Klin. Wochnschr., Nr. 18. 

 Logan 1916 The Lancet, 191, 824. 

 Morgan, H. R 1907 3rit. Med. J., 2, 16. 



Morgan and Ledingham, J. C. G. 1909 Proc. Roy. Soc. Med. 133. 

 Seligmann, E. 1917 Centralbl. f. Bakt. 



Tribondeau, L., and Fichet, M. 1916 Ann. de l'lnst. Past., 30, 357. 

 Thj0tta, T. 1919 J. Bact. 4, 355. 



