[The characteristics of gastroduodenal pathology in patients with chronic opisthorchiasis as a criterion for the clinical diagnosis of the invasion].

Using a syndrome approach the clinical pattern has been studied in 269 patients with chronic gastritis and duodenitis. 55 of patients had gastric ulcer, 105 patients had duodenal ulcer. In 130 patients chronic opisthorchiasis was diagnosed 8.9 +/- 1.9 years after the disease onset. The following syndromes are believed to be diagnostically valuable, enabling one to suspect chronic opisthorchiasis in patients with gastroduodenal pathology from the endemic foci: "low eosinophilia syndrome", "right hypochondrium" syndrome, "fever and enterocolitic syndrome" with the special consideration of the nature of dysbacteriosis of the small bowel.