TABLE 3.

DNA amplification by PCR or PCR-BSA in 139 samples^a

Samplea	Amplifi- cation methodb	Total no. of samples	No. of samples showing:
			T. gondii DNA absent	T. gondii DNA present	Inhibitor persistencec
RSW	PCR	16	13	3
	PCR-BSA	29	19		10
UW	PCR	32	26	6
	PCR-BSA	18	14		4
PDW	PCR	38	38
	PCR-BSA	6	5	1
Total		139	115	10	14

^aThere were 45 RSW samples, 50 UW samples, and 44 PDW samples.

^bThe PCR-BSA method was used when inhibitors hindered standard PCR.

^cPersistence after BSA treatment; result uninterpretable.