Objectives: Due to the side-effects of dehydroemetine, we have chosen praziquantel, a broad-spectrum antihelmintic, as a treatment for distomatosis secondary to Fasciola hepatica in humans. The aim of this retrospective study was to evaluate the efficacy and tolerance to praziquantel in patients with this disease.
Methods: Twenty-five patients (12 men) with a definite diagnosis of distomatosis and no previous treatment were followed-up between 8 months and 3 years (> 18 months in 76% of cases). The follow-up was based on clinical, biochemical and serological criteria. All patients received praziquantel (75 mg/kg/day orally) for 5 days. Treatment was started after endoscopic or surgical removal of parasites locolized in the biliary tract, in two patients. A similar therapeutic course was administered twice in four patients with persistent clinical symptoms, hypereosinophilia or arch 2 on immunoelectrophoresis.
Results: Cumulative rates of patients with normalized eosinophilia and seronegativation at 6, 9 and 12 months were 55, 65, 75% and 55, 70, 100%, respectively. Complete recovery occurred in 18 patients (72%) whereas hypereosinophilia persisted for more than one year in 5 patients. No side-effects, except transient nausea in a few cases, were observed.
Conclusion: Since praziquantel seems to be both effective and well tolerated in a large proportion of patients, this drug can be recommended as a first choice for distomatosis due to Fasciola hepatica in human.
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