TABLE 1.

Legionella genotype occurrence and environmental parameters measured in a drinking-water system in northern Israel^a

Sampling pointb	MLVA genotypec	Prevalence (%)	Temp (°C)	pH	Conductivity (mS/cm)d	Chlorine (mg/liter)
A	Gt15	86	45.1 ± 5.04	7.57 ± 0.14	1.05 ± 0.04	0.13 ± 0.12
C	Gt4	100	19.23 ± 3.05	7.59 ± 0.07	1.02 ± 0.07	0.01 ± 0.003
D	Gt4	88	20.85 ± 5.19	7.75 ± 0.21	0.97 ± 0.13	0.15 ± 0.04
E	Gt6	100	35.59 ± 6.16	8.36 ± 0.28	0.97 ± 0.06	0.12 ± 0.02
F	Gt6	100	23.83 ± 4.25	7.62 ± 0.32	1.03 ± 0.2	0.05 ± 0.01
G	Gt6	100	21.58 ± 4.86	7.70 ± 0.29	1.02 ± 0.1	0.41 ± 0.18

^aData are from reference 19.

^bThe selected sampling points in the drinking-water system covered the water route in the sampled zone. Point A was the point closest to where the drinking water entered the sampling area, and points C to G followed the water course.

^cStrains belonging to these three genotypes were examined in the present study. Gt4 and Gt6 strains were classified as serogroup 1, while Gt15 strains were classified as serogroup 3.

^dMillisiemens per centimeter.