Table 1. Summary of confirmed legionellosis cases and results of environmental PCR testing in the case-patients’ merchant vessel cabins, August 2015*.

Case-patient	Age, y	Onset	Infection	Hospital	UAT	Serology	PCR†	Cabin no.	Cabin samples (Aug 27)
									Shower water	Shower-head swab	Bathroom sink faucet
1	54	Aug 12	Lower respiratory	Regional	+	_	+	22	+	_	+
2	55	Aug 19	Lower respiratory	Tertiary	+	_	+	18	+	+	+
3	48	Aug 10	Mild respiratory	Not required	_	Conversion (0–2,048)	_	29	NA‡	NA‡	NA‡

*NA, not available; UAT, urinary antigen test; +, positive; –-, negative.
†PCR-positive Legionella pneumophila. 
‡Cabin in use on August 27, 2015. Water from hand basin faucet collected on August 20 by private agency was culture negative.