title: Improved lysotyping scheme for group C streptococci with new phage preparations.
mesh_terms: D001434:Bacteriophage Typing; D001435:Bacteriophages / Q000276:immunology; D008242:Lysogeny; D013291:Streptococcus / Q000145:classification*; D013297:Streptococcus pyogenes / Q000145:classification