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. 2012 Jan;50(1):91–97. doi: 10.1128/JCM.05612-11

Table 4.

Comparison of LAMP and qPCR assays in human stool specimens spiked with 103 and 104 CFU/0.5 g of STEC O157 strain EDL933 based on two independent repeats

Cell level (no. of CFU/0.5 g) Target gene LAMP Tt (min) after enrichment ofb:
qPCR CT (cycles) after enrichment ofb:
0 h 4 h 6 h 8 h 0 h 4 h 6 h 8 h
103 stx1 NAc 32.0 ± 2.6A 20.9 ± 1.5B 17.3 ± 1.6B NA 37.9a 34.1 ± 1.5A 29.1 ± 1.4A
stx2 NA 33.9 ± 2.3A 23.9 ± 1.1B 21.0 ± 1.3B NA NA 34.3 ± 1.5A 29.4 ± 1.5A
eae NA 27.8 ± 2.1A 19.0 ± 2.0B 15.9 ± 1.8B NA 37.2a 32.3 ± 1.4A 26.6 ± 1.5A
104 stx1 NA 22.9 ± 0.8A 18.9 ± 0.4B 18.2 ± 0.5B NA 34.5 ± 1.4A 31.3 ± 1.5A 30.2 ± 1.4A
stx2 NA 26.6 ± 1.3A 23.2 ± 0.5AB 21.5 ± 1.3B NA 34.5 ± 1.2A 31.2 ± 1.4AB 30.3 ± 1.3B
eae 26.9a 19.8 ± 3.0A 17.5 ± 1.4A 17.0 ± 1.1A NA 33.5 ± 1.8A 29.7 ± 1.5A 28.8 ± 1.1A
a

Only one repeat generated a positive result.

b

In each row within LAMP or qPCR, Tt or CT values followed by different uppercase letters are statistically significant (P < 0.05).

c

NA, not available.