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. 2017 Nov;23(11):1784–1791. doi: 10.3201/eid2311.170308

Figure 2.

Figure 2

Pulsed-field gel electrophoresis (PFGE) of case-patient and environmental isolates from a Legionnaires’ disease outbreak caused by an endemic strain of Legionella pneumophila, New York City, New York, USA, 2015. One clinical isolate with the outbreak PFGE pattern (Clinical isolate−outbreak pattern) shows matches to cooling tower (CT A and CT B) isolates from a South Bronx hotel (SB), a homeless shelter (HS), and East Bronx College (EBC). Molecular typing patterns of Legionella pneumophila serogroup 1 isolates from CT from the SB hotel, HS, and EBC were indistinguishable from 26 clinical isolates associated with the Legionnaires’ disease cluster in the South Bronx. Samples that were not linked to the outbreak had major differences in patterns when compared with the outbreak pattern.