The relation of phage pattern and lysogenicity in the phage typing of staphylococci of phage-group II

Summary A system of four phages is described which permits the differentiation of staphylococci in phage group II into about ten distinct patterns which are dependent on lysogenicity (see table 5). All phages are propagated on one propagating strain. Weak reactions are rare. The new patterns II A, II B ... to II K correlated reasonably with the patterns of theWilliams andRippon system.