FAMILY PHAGACEAE 



1141 



Other properties : Not readily inacti- 

 vated photodynamically ; completely in- 

 activated by 27 per cent urea solution in 

 1 hour at 37° C; lysis inhibited by 1 per 

 cent sodium citrate in agar medium but 

 not by 0.5 per cent or lower concentra- 

 tions. 



Literature: Burnet and Lush, Jour. 

 Path, and Bact., 40, 1935, 455-469. 



36. Phagus caducus H. {loc. cit., 160). 

 From Latin caducus, perishable, in refer- 

 ence to the easy destruction of this bac- 

 teriophage by concentrated urea solu- 

 tions . 



Common name: Staphylococcus bac- 

 teriophage Aul2. 



Host : Staphylococcus aureus Rosen- 

 bach. 



Geographical distribution: Australia. 



Induced disease : Small plaques, 0.2 to 

 0.5 mm in diameter, with sharp edges. 



Serological relationships : Cross-neu- 

 tralization reactions with staphylococcus 

 bacteriophages Aull and Aul3, but not 

 with staphylococcus bacteriophages Au2, 

 Au21, A, and C. Antiserum to staphylo- 

 coccus bacteriophage B gives no neutrali- 

 zation of Aul2, though the reciprocal re- 

 action occurs to 1 :200 dilution. 



Other properties: Not readily inacti- 

 vated photodynamically; completely in- 

 activated by 27 per cent urea solution in 

 1 hour at 37° C ; lysis inhibited by as little 

 as 0.25 per cent sodium citrate in agar. 



Literature: Burnet and Lush, Jour. 

 Path, and Bact., 40, 1935, 455-469. 



37. Phagus alpha H. (loc. cit., 161). 

 From Greek equivalent of common name. 



Common name : Staphylococcus bac- 

 teriophage A. 



Host : Staphylococcus albus Rosenbach. 



Geographical distribution: Australia. 



Induced disease : Plaques of medium 

 size, 1.5 to 2.5 mm in diameter, with hazy 

 peripherJ^ 



Serological relationships : Specific neu- 

 tralization reaction, but no cross-neu- 

 tralization reactions with staphylococcus 

 bacteriophages Au2, B, or C. 



Immunological relationships : Colonies 

 of Staphylococcus albus appearing after 

 lysis with this bacteriophage are resistant 

 to staphylococcus bacteriophages B, C, 

 and D. 



Thermal inactivation : .\t 68° to 70° C 

 in 30 minutes. 



Other properties : Not readily inacti- 

 vated photodynamically; not completely 

 inactivated by 27 per cent urea solution 

 in 1 hour at 37° C ; lysis not inhibited even 

 by 1.5 per cent sodium citrate in agar. 



Literature: Burnet and Lush, Jour. 

 Path, and Bact., 40, 1935, 455-469 ; Burnet 

 and ^IcKie, Austral. Jour. Exp. Biol, and 

 :\Ied. Sci.,6, 1929, 21-31. 



38. Phagus beta H. (loc. cit., 162). 

 From Greek equivalent of common name. 



Common name : Staphylococcus bac- 

 teriophage B. 



Host : Staphylococcus albus Rosenbach. 



Geographical distribution: Australia. 



Induced disease : Plaques of medium 

 size, 0.7 to 1.5 mm in diameter, with 

 sharp edges. 



Serological relationships : Specific neu- 

 tralization reaction, but no cross-neu- 

 tralization reaction with respect to 

 staphylococcus bacteriophages Au2, Aul2, 

 A, or C, except that antiserum made with 

 Aul2 neutralizes this bacteriophage in 

 low dilutions (See Phagus caducus). 



Immunological relationships : Colonies 

 appearing after lysis of Staphylococcus al- 

 bus with this bacteriophage furnish organ- 

 isms susceptible to staphylococcus bac- 

 teriophages A and D. 



Thermal inactivation : At 63° to 65° C 

 in 10 minutes. 



Other properties: Readily inactivated 

 photodynamically; completely inacti- 

 vated by 27 per cent urea solution in 1 

 hour at 37° C ; lysis not inhibited even by 

 1.5 per cent sodium citrate in agar 

 medium. 



Literature: Burnet and Lush, Jour. 

 Path, and Bact., 40, 1935, 455-469 ; Burnet 



