Table 3.
Relationship between parasitemia and serology in the period between 6 and 12 months of age congenitally infected babies by Trypanosoma cruzi*
| Age of babies (months) | Parasitemia | Serology | Total | |||
|---|---|---|---|---|---|---|
| Positive | Negative | Reactive | No reactive | Discordant | ||
| 6 | 31 | 0 | 19 | 10 | 2 | 31† |
| 7 | 13 | 0 | 10 | 3 | 0 | 13‡ |
| 8 | 3 | 0 | 2 | 1 | 0 | 3‡ |
| 9 | 11 | 0 | 6 | 3 | 2 | 11§ |
| 10 | 1 | 2 | 3 | 0 | 0 | 3 |
| 11 | 4 | 0 | 4 | 0 | 0 | 4 |
| 12 | 15 | 3 | 18 | 0 | 0 | 18 |
| Total | 78 | 5 | 62 | 17 | 4 | 83 |
| % | 94 | 6 | 74.7 | 20.5 | 4.8 | 100 |
*
The overall difference between parasitemia and serology at 6 to 9 months was 36.2% (confidence interval [CI] 95%, 23.8–48.6, P = 0.000).
†
At 6 months, it was 38.7% (CI 95%, 21.6–55.9, P = 0.000).
‡
At 7–8 months, 25% (CI 95%, 3.8–46.2, P = 0.101).
§
At 9 months, 45.5% (CI 95%, 16.0–74.9, P = 0.035).