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2011-2012 Outbreaks Associated with Environmental & Undetermined Water Exposures Surveillance Report: Supplemental Table

This table provides supplemental information not published in Outbreaks Associated with Environmental & Undetermined Water Exposures — United States, 2011-2012 (MMWR Weekly).

Table: Waterborne Disease Outbreaks Associated with Environmental & Undetermined Water Exposures* (N=18) by Year and Exposure State/Jurisdiction — Waterborne Disease and Outbreak Surveillance System, United States, 2011–2012.

State/ Jurisdiction Month Year Class† Etiology (Confirmed/Suspected) Predominant Illness§ No. cases No. hospital-izations¶ No. deaths** Deficiency†† Water Source Setting
Colorado May 2011 4 Giardia intestinalis (C)  AGI 2 0 0 12 River/Stream Camp/Cabin Setting
Florida Oct 2011 4 Legionella pneumophila serogroup 1 (C)   ARI 3 3 1 5b Ornamental fountain Mobile Home Park
Florida Nov 2012 4 Legionella pneumophila (C)   ARI 2 2 0 5c Unknown Hotel/Motel/Lodge/Inn
Idaho Feb 2012 4 Giardia intestinalis (C)  AGI 4 0 0 12 River/Stream National Forest
Illinois Jul 2012 1 Legionella pneumophila serogroup 1 (C)   ARI 114 15 3 5b Ornamental fountain Hotel/Motel/Lodge/Inn
Illinois Aug 2012 1 Legionella (S)§§ ARI 56 0 0 5b Ornamental fountain Hotel/Motel/Lodge/Inn
Massachusetts Sep 2011 4 Legionella pneumophila serogroup 1 (C)    ARI 2 2 0 5c Unknown Indoor Workplace/Office
New York Jul 2011 4 Legionella pneumophila serogroup 1 (C)    ARI 5 4 1 5b Cooling Tower Hospital/Health Care
New York Jul 2011 3 Legionella pneumophila serogroup 1 (C)    ARI 2 2 1 5c Unknown Hospital/Health Care
Ohio Jan 2010¶¶ 4 Legionella pneumophila serogroup 1 (C)    ARI 4 4 1 5c Unknown Hospital/Health Care
Ohio Jul 2011 3 Legionella pneumophila (C)  ARI 3 3 1 5c Unknown Hospital/Health Care
Ohio Sep 2011 4 Legionella pneumophila serogroup 1 (C)    ARI 5 5 1 5c Unknown Other***
Ohio Feb 2012 4 Legionella pneumophila serogroup 1 (C)    ARI 8 8 2 5c Unknown Long Term Care Facility
Ohio Nov 2012 4 Legionella pneumophila serogroup 1 (C)    ARI 7 3 0 5c Unknown Long Term Care Facility
Pennsylvania Aug 2011 4 Legionella pneumophila serogroup 1 (C)    ARI 8 4 0 5c Unknown Long Term Care Facility
Pennsylvania Jul 2012 3 Legionella pneumophila serogroup 1 (C)    ARI 34 11 0 5c Unknown Hotel/Motel/Lodge/Inn
Utah Nov 2011 4 Giardia intestinalis (C)     AGI 20 0 0 12 River/Stream Public outdoor area
West Virginia Jun 2011 4 Legionella pneumophila serogroup 1 (C)    ARI 3 3 0 5c Unknown Resort
Wisconsin May 2012 3 Legionella pneumophila serogroup 1 (C)    ARI 2 2 0 5b Storage Tank Factory/Industrial Facility

Abbreviations: AGI = acute gastrointestinal illness; ARI = acute respiratory illness; Other = undefined, illnesses, conditions, or symptoms that cannot be categorized as gastrointestinal, respiratory, ear-related, eye-related, skin-related, neurological, hepatitis or caused by leptospirosis.

* The environmental and undetermined category includes outbreaks not associated with public or private drinking water systems and recreational water venues (e.g. swimming pools), and includes outbreaks for which the intended use of the water is not known.

† Strength-of-evidence class determined on the basis of epidemiologic, clinical laboratory, and environmental data (e.g., water quality data) provided to CDC. For more information, see Strength-of-Evidence Classification for Waterborne Disease & Outbreaks .

§ The category of illness reported by ≥50% of ill respondents. All legionellosis outbreaks were categorized as ARI.

¶ Value was set to missing in reports where zero hospitalizations were reported and the number of people for whom information was available was also zero.

**Value was set to missing in reports where zero deaths were reported and the number of people for whom information was available was also zero.

†† Deficiency classification assigned to outbreaks associated with drinking water, other water, and unknown water exposures. Deficiency Classification for Drinking Water and Other, Non-recreational Waterborne Disease Outbreaks.

§§ Outbreak of Pontiac Fever; Legionella pneumophila serogroup 1 found in water samples.

¶¶ The first case of illness in this outbreak occurred prior to 2011-2012, but the outbreak was reported later and not previously described in a surveillance report.

***Multi-use facility serving individuals with disabilities.

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