

112 THE BACTERIOPHAGE 



phage active for the vibrio been found. This gave about fifty- 

 plaques when planted on agar. In spite of many attempts it 

 has been impossible to cultivate it by serial transfers. None 

 of the fatal cases yielded a bacteriophage. 



The diversity of the bacterial types against which, up to the 

 present time, virulent strains of bacteriophage have been iso- 

 lated, suggests the idea that the activity of the bacteriophage 

 may be manifested toward any bacterial species whatsoever. 



