“…Furthermore, non-tuberculosis Mycobacterium species [41,47], Klebsiella pneumoniae [37,57], P. aeruginosa [16,26] and S. marcescens [30,44,57] have also been identified. Despite tight controls to make sure the treatment water is safe, an elderly patient died from legionellosis following dental treatment in which L. pneumophila serogroup I was identified using molecular profiling from isolates taken both from the patient and from the clinical environment of the dental practice where treatment was performed, confirming the source of infection [43].…”