Table 1.

Serologic follow-up for Trypanosoma cruzi infection of children in March 1989 and March 1992 in Amamá, Argentina^*

	Serodiagnosis in 1992
Serodiagnosis in 1989	Positive	Negative	Discordant	Lost to follow-up	Total
Positive*	18	0	3	4	25
Negative	5†	49	2†	12	68
Discordant	0	2‡	0	3	5
Total	23	51	5	19	98

^*Children were ≤ 16 years old in March 1989. Seropositive refers to samples reactive by at least two different serologic tests in any one year. Discordant refers to samples reactive by only one test in any one year.

^†Confirmed as seropositive in a subsequent blood sample.

^‡Both were seronegative in a subsequent blood sample.