Phage typing is widely used for the intraspecies classification of one of the following bacteria:
Ans. is 'a' i.e., StaphylococciStaphylococcus strains are further differentiated into subspecies level on the basis of their bacteriophage susceptibility.
Staphylococci
E. coli
Kleb. Pneumoniae
Pseudomonas aeruginosa
Virology