TABLE 4.

Numbers of correctly identified spiked samples in relation to spore concentration^a

Laboratory	No. of correctly identified samples spiked with:
	102E. hellem spores/g (n = 2)b	103E. intestinalis spores/g (n = 2)c	104E. hellem or E. cuniculi spores/g (n = 2 each)d	106E. hellem, E. cuniculi, or E. intestinalis spores/g (n = 2 each)e
M1	0	0	0	6
M2	0	0	0	4
M3	0	0	0	4
M4	0	0	0	4
M5	0	0	0	0
M6	0	0	1	4
P1	2	2	4	6
P2	1	1	3	4
P3	0	2	0	6
P4	0	0	1	2
P5	0	1	0	2

^aWithout species identification and without laboratory P6. 

^bThe average percentages of correctly identified samples at this concentration were 0% at the light microscopy laboratories and 30% at the PCR laboratories. 

^cThe average percentages of correctly identified samples at this concentration were 0% at the light microscopy laboratories and 60% at the PCR laboratories. 

^dThe average percentages of correctly identified samples at this concentration were 4% at the light microscopy laboratories and 40% at the PCR laboratories. 

^eThe average percentages of correctly identified samples at this concentration were 61% at the light microscopy laboratories and 67% at the PCR laboratories.