BEHAVIOR OF BACTERIOPHAGE IN DISEASE 



453 



For the first three curves only (charts 6, 7, and 8) the organism of 

 the patients had not been isolated (they had fevers which appeared 

 benign) and the curves of the virulence of the bacteriophage against 

 the bacillus of the patient is, of course, lacking. For these three cases 



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Louis Pi... 



40 



3£ 



38 



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Chart 7. Louis Pi (17 years) Clinically, Typhoid Fever 



B. typhosus 



B. paratyphosus A- - 



Virulence for -j B. coli 



B. paratyphosus B 



B. dysenteriae Shiga - 



the virulence of the bacteriophage against a Shiga dysentery strain, 

 and against the paratyphoids A and B are given. 



We will select as examples cases of different severity. 



1. Mild infections 



These were cases of typhoid fever or paratyphoid fever running a 

 mild course. Clinically they were typhoid fever but the blood and stool 



