TABLE 1.

Results of replicate PCR trials

No. of oocysts/g of soil	No. of replicate sample aliquots amplified	Proportion successful
0	9	0.00
40	10	0.40
45	10	0.40
50	5	0.40
68	7	0.57
90	7	0.57
113	10	0.70
150	10	0.80
200	5	1.00
500	5	1.00