Temporal relationship during the prolonged outbreak comparing A) clinical, B) environmental and C) infection control interventions; section B includes overall number of swabs taken during each quarter. Infection control (IC) interventions were; I. Access of deep drains for cleaning; II. Extensive cleaning of all sinks and drains; III. Introduction of regular environmental surveys; IV. Terminal cleaning of the Burns Unit; PA = denotes patients with known MBL colonization prior to transfer into Burns Unit.