BACILLUS OF MORGAN 71 



After one month of disease stools grew solid, and patient recovered. 



During the whole disease there might always be cultivated typical 

 Morgan bacilli from the feces and there were never found any other 

 pathogenic microbes in the stools. 



The Morgan bacilli disappeared when the stools grew solid. 



IX. Man, twenty years old. Suddenly taken ill with severe attack of 

 acute colitis. Stools numerous consisting mostly of pus and mucus. 



Recovered after two weeks of illness. 



Cultures from stools regularly showed masses of colonies of the 

 Morgan bacilli. 



MORPHOLOGICAL CHARACTERS OF BACILLI ISOLATED 



All these strains were Gram negative bacilli. As to motility 

 a disagreement was apparent between the first examination and 

 an examination made a year and a half after the isolation from 

 stools. 



On the first examination strain I was found immobile, all the 

 others distinctly motile. On the second examination, however, 

 only one, strain III, of the first seven strains showed motility, 

 while the others had lost this faculty completely. 



The two last strains being isolated after that examination 

 were only examined once and were found mobile. 



CULTURAL CHARACTER OF BACILLI 



All these strains were culturally typical Morgan strains im- 

 mediately after the isolation. It must, however, be stated that 

 strain IV showed itself atypical in as far as it produced slight acid 

 in mannitol and sucrose after a growth of three days and did not 

 produce indol in beef broth. It did, however, ferment glucose 

 with production of gas and acid and could serologically not be 

 placed in any other known class of microbes. It was therefore 

 considered as an atypical Morgan strain and studied together 

 with the typical ones. 



After the first examination the strains (with the exception of 

 VIII and IX) were grown on artificial media up to one and a half 

 years and then examined as to growth again. 



