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[The sleep-wake cycle during Trypanosoma brucei rhodesiense human African trypanosomiasis in 2 French parachutists].

Polysomnography was performed in two military personnel who contracted human African trypanosomiasis (HAT) in Rwanda. They were evacuated to France and gramined during the fourth, sixth and eleventh months of evolution. Patient A presented a meningoencephalitis with Trypanosoma brucei rhodesiense (T. b. r.) in the cerebrospinal fluid. Between the second and third treatments with melarsoprol, the patient presented an acute encephalitic attack with pyramidal and cerebellar symptoms, which were improved by corticotherapy and disappeared progressively in 6 months. Patient B presented a major inflammatory syndrome with T. b. r. in the blood and the medulla. Cerebrospinal fluid and serology remained normal. The patient received only one session of melarsoprol treatment. Polysomnography recordings were continuously taken on an ambulatory Oxford Medilog system during 48 hours. The different stages of vigilance were scored according to the classical Rechtschaffen and Kales criteria. During the fourth month, both subjects presented several long diurnal naps, with the presence of rapid-eye-movement sleep at the end of the sleep episodes. These abnormalities disappeared progressively during the following recordings. Electroencephalographic abnormalities were observed in patient A, particularly during the eleventh month. They consisted in transitory arousal phases concomitant with myoclonic jerks and with the persistence of slow waves during slow-wave sleep. The various anomalies noted in the two patients allow us to recommend the supervision of the evolution of HAT by polysomnographic recording in a sleep laboratory.