6g TH. THJ0TTA 



The microbe was found fairly pathogenic to animals. Rats 

 and monkeys acquired a fatal diarrhoea after feeding on agar 

 slope cultures of the microbe. 



The bacillus of Morgan has also been described from Den- 

 mark, where first Bahr and 0hrum, and later Bahr and Thom- 

 sen found it in stools from diarrhoea of infants. The Danish 

 authors report certain characteristics which differ from the de- 

 scription of Morgan and Ledingham, such as frequent failure to 

 produce indol; yet in spite of these smaller differences there is 

 no doubt as to the identity of the English bacillus of Morgan 

 and the Danish so-called Metacoli. 



The Danish authors however classify the microbe in four sub- 

 groups according to the growth of the various strains in media 

 not used by the English investigators (galactose, mannose, 

 xylose, arabinose and adonitol). There is however the greatest 

 probability that these subgroups are not of any great importance. 



Later on the microbe is mentioned by Tribondeau and Fichet 

 (1916) who found it in stools from clinical dysentery from the 

 Dardanelles. The authors never found the various strains 

 agglutinable in sera from the patients, from whom the strains 

 had been isolated. 



Logan (1916) found the bacillus in stools from children suffer- 

 ing from acute diarrhoea and in the stools of 2 out of 21 healthy 

 children. 



D'Herelle (1917) reported this microbe as the cause of dysen- 

 tery, while German authors (Seligman, 1917, Jungmann and 

 Neisser, 1917, Kindberg, 1917) found " atypical dysentery 

 strains," that seem to be identical with the bacillus of Morgan. 



Lastly this bacillus has been studied by Bang in Copenhagen. 



SOURCE OF MATERIAL STUDIED IN THE PRESENT INVESTIGATION 



The technique used in the isolation and study of the following- 

 strains has been the one used in the author's work on 

 dysentery in Norway (Thj0tta, 1919). 



Immediately after isolation the strains have been examined as 

 to motility, growth in the various sugar media, production of 



