Other numbers: NCTC 8511, strain PS 53. History: < M.L. Morse < ATCC < NCTC < R.E.O. Williams < F.R. Selbie. Isolated from: Wound. Additional information: Wild type reference culture. Production of ß-lactamase. Good penicillinase producing strain. Propagating strain for typing phage 53 (NCTC 8406). Biohazard group 2. Cultivation conditions: Medium 71, 37°C.