TABLE 2.

Legionella species or types related to 16S rRNA gene sequences (similarities of >97%) obtained from untreated surface water, pretreated surface water from open storage basins, treated surface water, and treated groundwater, in decreasing frequency of occurrence

Species or type	Human pathogena	No. of sequences obtained from:					Total no. of sequences (%)
		SW	Open storage basin	Treated SW	Treated anaerobic GW	Treated aerobic GW
L. worsleiensis	−	2	2	1	5	1	11 (5.5)
L. bozemanii	+	1	1	3b	5 (3b)		10 (5.0)
L. lytica (LLAP 9)	+	1	1	3b			5 (2.5)
L. pneumophila	+	3	1		1		5 (2.5)
L. waltersii	−		1	3b		1	5 (2.5)
L. quateirensis	−		1		1	3b	5 (2.5)
L. donaldsonii	−	1	1	1			3 (1.5)
LLAP 2c	−	1			1	1	3 (1.5)
LLAP 7c	−	2	1				3 (1.5)
L. adelaidensis	−				1	1	2 (1.0)
L. dumoffii	+		1		1		2 (1.0)
L. londiniensis	−	1		1			2 (1.0)
LLAP 4d	+	1		1			2 (1.0)
L. rowbothamii (LLAP 6)	−	2					2 (1.0)
L. anisa	+			1			1 (0.5)
L. fairfieldensis	−				1		1 (0.5)
L. drozanski (LLAP 1)	+	1					1 (0.5)
LLAP 3c	+		1				1 (0.5)
LLAP 8	−		1				1 (0.5)
L. fallonii (LLAP 10)	+			1			1 (0.5)
LLAP 11d	−	1					1 (0.5)
L. micdadei	+					1	1 (0.5)
L. steigerwaltii	−				1		1 (0.5)
L. wadsworthii	−		1				1 (0.5)
Total identified (%)		17 (34.7)	13 (44.8)	15 (30)	17 (34.7)	8 (32)	70 (34.7)
Total isolated		49	29	50	49	25	202 (100)

^aSpecies associated with cases of disease. −, no reports; +, references 17, 33, and 35.

^bNumber of 16S rRNA gene sequences from a single sample.

^cRelated to L. lytica (LLAP 9).

^dRelated to L. drancourthii (LLAP 12).