Table 1.

IMS recovery efficiency for N. fowleri seeded into 5 mL of water (n = 6).

Genotype (strain)	Water type	Cyst stage (average ± SD)	Trophozoite stage (average ± SD)
I (CDC:V212)	Amended DI	50 ± 11%	83 ± 9%
	Lake*	67 ± 7.9%	85 ± 5.5%
II (CAMP)	Amended DI	71 ± 7.6%	77 ± 2.5%
	Lake	68 ± 2.8%	82 ± 10%
III (CDC:V515)	Amended DI	62 ± 13%	87 ± 6.6%
	Lake	56 ± 14%	94 ± 4.0%
IV (ATCC 30462)	Amended DI	60 ± 21%	97 ± 5.3%
	Lake	65 ± 7.2%	92 ± 6.0%
All 4 genotypes	Amended DI	69 ± 16%	87 ± 9.5%
	Lake	63 ± 10%	89 ± 7.2%

*GA lake water filtered through a 2.7 μm cellulose acetate filter.