1144 



MANUAL OF DETERMINATIVE BACTERIOLOGY 



plaque diphtheria bacteriophage, P. Ju- 

 tilis. 



Geographical distribution : Australia. 



Induced disease : In Corynehacterium 

 diphiheriae on agar, plaques 1 .0 to 1 .5 mm 

 in diameter, with shelving edge. A few 

 resistant bacterial colonies often appear 

 in the central clear area. 



Literature: Keogh et al.. Jour. Path, 

 and Bact., 46, 1938, 565-570; Smith and 

 Jordan, Jour. Bact., SI, 1931, 75-88; Stone 

 and Hobby, Jour. Bact., 27, 1934, 403-417. 



46. Phagus futilis H. {loc. cit., 168). 

 From Latin Jutilis, vain, in reference to 

 regular appearance of resistant organisms 



in plaques on agar cultures lysed by this 

 bacteriophage. 



Common name : Small-plaque diph- 

 theria bacteriophage. 



Host : Corynehacterium diphtheriae 

 Lehmann and Neumann, gravis type I 

 isolates and all but 5 gravis type II iso- 

 lates. 



Insusceptible species : All tested inter- 

 mediate and mitis strains of C. diph- 

 theriae. 



Geographical distribution : Australia. 



Induced disease : In Corynehacterium 

 diphtheriae on agar, pin-point plaques or 

 confluent plaques, with confluent growth 

 of secondary, resistant organisms. 



Literature: Keogh et al.. Jour. Path, 

 and Bact., ^6, 1938, 565-570. 



