Abstract
Cystic echinococcosis is considered as an emerging zoonosis that can develop asymptomatically for years, clinically nonpathognomic. The disease is of public health importance due to often late, difficult diagnostics, uncertain results of treatment, the need to remove hydatid cysts surgically in advanced cases, and poor prognosis in untreated patients. Six Polish female patients with diagnosed cystic echinococcosis (CE) were examined. DNA extracted from the liver and lung samples served for amplification of mitochondrial nad1 gene fragment. Sequence alignments of 5 isolates showed identity with the pig strain, Echinococcus canadensis G7. One case was in 100% identical with Echinococcus ortleppi G5, the cattle strain. These data demonstrate first report of E. ortleppi, regarded as extinct species, causing human cystic echinococcosis in Poland, where the most frequent causative agent of human CE is E. canadensis.
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