Attenuated Legionella pneumophila Survives for a Long Period in an Environmental Water Site

Table 1

Characteristics of L. pneumophila isolates.

Place	SG	Strain	Growth in THP-1
Ashiyu foot spa 1	3	AY1	+
Ashiyu foot spa 2	1	AY2	++
	3	AY8	++
	UT	AY3	-
Water fountain 1	1	AY10	++
Water fountain 2	1	K19	++
	5	K11	++
	13	K27	+
Public bath 1	3	AY17	++
Public bath 2	2	K3	++
	4	K7	+
	8	K8	+
	9	K1	+
	UT	K6	+

−; less than 1 fold increase, +; 3-10 fold increase, ++; more than 10 fold increase