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Blood samples from working dogs were tested for anti-T. cruzi antibodies using IFA and Chagas Stat-Pak. Only those samples positive on both assays were considered positive for calculation of seroprevalence. *In addition to these 55 IFA-positive dogs, there was one additional dog with an antibody titer of 160 that was not run on the Chagas Stat-Pak.
| IFA | ||||
|---|---|---|---|---|
| Positive | Negative | Total | ||
| StatPak | Positive | 49 | 4 | 53 |
| Negative | 6 | 26 | 32 | |
| Total | 55* | 30 | 85 | |
