Results of the follow-up of four untreated patients in the Bonon focus in 2009.

All patients were positive to the CATT performed on plasma and trypanosomes were detected either in blood or lymph juice at first diagnosis.1CATT on plasma, considered positive (+) if CATT-P end titres ≥1/8.2Trypanosome in blood and/or lymph juice (+ = presence, − = absence).3trypanolysis test, results are given as follows: Litat 1.3/Litat 1.5/Litat 1.6 (+ = positive TL).