Table 1.

Comparison of culture method and commercial PCR kit (laboratory 1)

Total = 90	Legionella spp. (sample IDs)‡	Legionella pneumophila (sample IDs)	Legionella pneumophila serogroup 1 (sample IDs)
Culture* + and PCR† +	31	15	5
Culture − and PCR −	55	69	85
Culture + and PCR −	2 (ID 061, 025)	0 (no samples)	0 (no samples)
Culture − and PCR +	2 (ID 004, 034)	6 (ID 003, 012, 013, 032, 033, 034)	1 (ID 003)

^* Culture describes confirmation on specific agar. + and − describe the final confirmation result.

^† PCR describes confirmation using PCR. + and − describe the final confirmation result.

^‡ For samples with divergent PCR and culture method result, sample IDs are given (for more information, see Table 2).