Other numbers: ATCC 10536, CCUG 3274, CIP 54.127, CN 6455, CNCTC Ec 326/71, DSM 682, LMG 10266, NCIMB 8879, NCTC 10418, PCI 540, WHO 5. History: < NCTC < E.J. Stokes. Additional information: Antibiotic assay (5765,6287); a Gram-negative control organism for colistin and polymyxin (3110,5553); control strain for ENTERO-Rapid 24, COLItest, mCOLItest, ENTERO 3H test; glutamic acid test; testing of microbial aerosol samplers (6521). Biohazard group 2. Cultivation conditions: Medium 71, 37°C.