TABLE 2.

Maximum specific growth rates of two environmental isolates and a laboratory strain^a in anaerobic cultures at 10, 15, and 37°C

Temp and organism	Maximum specific growth rate (h−1) ± SEb
	Minimal medium	Soil extract medium
37°C
K-12	0.379 ± 0.029 B	0.394 ± 0.029 B
Isolate 3	0.528 ± 0.029 A	0.524 ± 0.029 A
Isolate 5	0.555 ± 0.029 A	0.505 ± 0.029 A
15°C
K-12	0.061 ± 0.031 F	0.036 ± 0.031 H
Isolate 3	0.166 ± 0.031 D	0.194 ± 0.031 C
Isolate 5	0.140 ± 0.031 E	0.148 ± 0.031 E
10°C
K-12	0.016 ± 0.017 I	0.019 ± 0.017 I
Isolate 3	0.063 ± 0.017 F	0.061 ± 0.017 F
Isolate 5	0.042 ± 0.017 GH	0.044 ± 0.017 G

^aIsolates 3 and 5 are environmental isolates; K-12 is a laboratory strain.

^bCapital letters next to growth rates represent Bonferroni groupings for within-temperature comparisons. Growth rates followed by the same letter are not significantly different.