title: Reply to Shelton.
authors.affiliation: Mayo Clinic, Rochester, Minnesota.
authors.forename: Dale A
authors.initials: DA
authors.lastname: Krageschmidt
authors.forename: Allen F
authors.initials: AF
authors.lastname: Kubly
authors.forename: Mark S
authors.initials: MS
authors.lastname: Browning
authors.forename: Alan J
authors.initials: AJ
authors.lastname: Wright
authors.forename: Martin J
authors.initials: MJ
authors.lastname: Detmer
authors.forename: William F
authors.initials: WF
authors.lastname: McCoy
mesh_terms: D006268:Health Facilities / Q000592:standards*; D006801:Humans; D014871:Water Microbiology