title: Active Bacterial Core Surveillance for Legionellosis - United States, 2011-2013.
abstract: During 2000–2011, passive surveillance for legionellosis in the United States demonstrated a 249% increase in crude incidence, although little was known about the clinical course and method of diagnosis. In 2011, a system of active, population-based surveillance for legionellosis was instituted through CDC’s Active Bacterial Core surveillance (ABCs) program. Overall disease rates were similar in both the passive and active systems, but more complete demographic information and additional clinical and laboratory data were only available from ABCs. ABCs data during 2011–2013 showed that approximately 44% of patients with legionellosis required intensive care, and 9% died. Disease incidence was higher among blacks than whites and was 10 times higher in New York than California. Laboratory data indicated a reliance on urinary antigen testing, which only detects Legionella pneumophila serogroup 1 (Lp1). ABCs data highlight the severity of the disease, the need to better understand racial and regional differences, and the need for better diagnostic testing to detect infections.
authors.forename: Kathleen L
authors.initials: KL
authors.lastname: Dooling
authors.forename: Karrie-Ann
authors.initials: KA
authors.lastname: Toews
authors.forename: Lauri A
authors.initials: LA
authors.lastname: Hicks
authors.forename: Laurel E
authors.initials: LE
authors.lastname: Garrison
authors.forename: Brian
authors.initials: B
authors.lastname: Bachaus
authors.forename: Shelley
authors.initials: S
authors.lastname: Zansky
authors.forename: L Rand
authors.initials: LR
authors.lastname: Carpenter
authors.forename: Bill
authors.initials: B
authors.lastname: Schaffner
authors.forename: Erin
authors.initials: E
authors.lastname: Parker
authors.forename: Susan
authors.initials: S
authors.lastname: Petit
authors.forename: Ann
authors.initials: A
authors.lastname: Thomas
authors.forename: Stephanie
authors.initials: S
authors.lastname: Thomas
authors.forename: Robert
authors.initials: R
authors.lastname: Mansmann
authors.forename: Craig
authors.initials: C
authors.lastname: Morin
authors.forename: Benjamin
authors.initials: B
authors.lastname: White
authors.forename: Gayle E
authors.initials: GE
authors.lastname: Langley
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006801:Humans; D007875:Legionella / Q000302:isolation & purification*; D007876:Legionellosis / Q000453:epidemiology*; D008297:Male; D008875:Middle Aged; D011159:Population Surveillance / Q000379:methods*; D014481:United States / Q000453:epidemiology