<prompt> Phage typing is widely used for the intraspecies classification of one of the following bacteria:StaphylococciE. coliKleb. PneumoniaePseudomonas aeruginosa  <response>: Ans. is a i.e., StaphylococciStaphylococcus strains are further differentiated into subspecies level on the basis of their bacteriophage susceptibility. 