“…Five hundred and fifty-seven cultures were kindly provided by 16 laboratories in 10 European countries (Table 1). In addition, serotype 0 12 isolates from an outbreak in a London (Roehampton) burns unit (13) and recent isolates from this unit were included. The serotype strains and antisera were as described (8) and the phage and respective propagating strains were 7, 16, 21, 24, 31, 44, 68, 73, F7, F8, F10, 109, 119X, 352, 1214, M4, M6, C21, Cl1, C18 and 188/1 Carbenicillin and gentamicin resistance.…”