Table 3. Incidence of new infection events.
| Boffa West no vector control | Boffa East with impregnated targets | ||||
|---|---|---|---|---|---|
| n | Incidence (%) | n | Incidence (%) | P 3 | |
| CATT negative in 2012 | 1279 | 2777 | |||
| CATT+ TL+ in 2013 1 | 16 | 1.25 | 2 | 0.07 | <0.0001 |
| Confirmed HAT in 2013 2 | 14 | 1.09 | 2 | 0.07 | <0.0001 |
The incidence of new specific sero-conversion events and of confirmed HAT cases was calculated in Boffa West and Boffa East based on individuals that tested negative to the CATT in 2012 and who were seen again during the 2013 medical survey.
1 Positive to the CATT test and positive to the T. b. gambiense immune trypanolysis test
2 Trypanosomes were detected by direct microscopic examination of lymph node aspirates or by the mini-anion exchange centrifugation test performed on buffy coat.
3 P-value (Fisher exact test).