[Recurrent forms of opisthorchiasis].

The paper deals with follow-ups of 4 patients with chronic opisthorchiasis, two of whom were treated with chloxylum and two with bilthricide. Eight-thirty six months after discontinuation of anthelmintics, there were recurrent or enhanced complaints, repeated finding of Opisthorchis eggs and antigens in the feces. These changes were accompanied by elevated blood eosinophil counts. It is suggested that Opisthorchis metacercariae can be long preserved in latency in the definitive host and recurrent opisthorchiasis forms may develop.