Table 1. Diagnostic test results in infants with congenital T. cruzi infection.

	Micromethod		PCR		Serology	Chunap
Infant code	Birth	1 month	Birth	1 month	6 to 12 months	Chunap 1 month	Chunap Bands
1	NEG	NEG	POS	POS	POS	POS	22 kDa, 75 kDa
2	NEG	NEG	NEG	POS	POS	POS	22 kDa, 75 kDa
3	NEG	POS	POS	POS	PT	POS	22 kDa
4	NEG	NEG	NEG	NEG	POS	POS	22 kDa, 58 kDa
5	NEG	NEG	POS	POS	POS	POS	82 kDa
6	NEG	NEG	NEG	POS	POS	POS	42 kDa
7	POS	PT	POS	POS	PT	POS	42 kDa
8	POS	PT	POS	PT	PT	POS	42 kDa
9	POS	PT	NEG	POS	PT	POS	22 kDa, 58 kDa
10	NEG	POS	NEG	POS	PT	POS	22 kDa, 42 kDa, 58 kDa
11	NEG	NEG	POS	POS	POS	POS	22 kDa, 58 kDa
12	NEG	POS	NEG	POS	PT	POS	22 kDa, 58 kDa
13	POS	PT	POS	PT	PT	POS	82 kDa
14	NEG	NEG	POS	POS	POS	POS	82 kDa
15	NEG	NEG	NEG	POS	POS	POS	82 kDa
16	NEG	NEG	POS	no data	POS	POS	82 kDa
17	NEG	NEG	POS	POS	POS	POS	22 kDa, 58 kDa
18	NEG	POS	POS	no data	PT	POS	22 kDa, 58 kDa, 75 kDa, 82 kDa
19	NEG	NEG	POS	no data	POS	POS	22 kDa, 42 kDa, 58 kDa, 82 kDa
20	NEG	NEG	no data	NEG	POS	POS	22 kDa, 42 kDa, 58 kDa, 82 kDa
21	NEG	NEG	NEG	POS	POS	POS	22 kDa, 58 kDa, 75 kDa, 82 kDa
22	NEG	NEG	NEG	POS 1	POS	NEG
23	NEG	NEG	POS	no data	POS	NEG
Total	4/23	4/19	13/22	15/17	15/15	21/23
Sensitivity (%)	17	21	59	88	100	91
(95% CI)	(5.1–38.8)	(6.2–45.6)	(36.4–79.3)	(63.5–98.2)	(78.0–100.0)	(71.9–98.7)

The results of each test are reported only if the samples were obtained before the treatment was initiated.

¹Specimen taken at 3 months.

95% CI: 95% Confidential Interval.

PT: Post-treatment.

POS: Positive. NEG: Negative.