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During the last 10 years 70 cases of echinococcosis were diagnosed in the Department of Infectious Diseases, Medical University School of Białystok, of whom 63 were Echinococcus (E.) granulosus infections. The Urban population (70%) and women (60%,) dominated among intected persons. Seven cases were due to E. multilocularis infection. A family and endemie focus of E. multilocularis human invasion has been identified.
This study presents the first molecular and serological evaluation of Echinococcus granulosus infections in wild boars in Iran. Twenty five wild boars were collected in south-western Iran, during authorized hunting program, from March to October 2013, necropsied and examined for E. granulosus infection. Furthermore, seroprevalence of cystic echinococcosis in hunted boars was evaluated by an ELISA system. A fertile hydatid cyst due to E. granulosus was detected in the lung of one of the animals. Genotype analysis of the isolate was determined by analyzing a mitochondrial gene, cytochrome C oxidase subunit 1 (co1). DNA was extracted from the cyst sample and polymerase chain reaction amplification and DNA sequencing of the specific region of the co1 gene was performed. Molecular evaluation confirmed the presence of a sheep strain, the G1 genotype, in the wild boar in south-western Iran. This is the first report of the presence of G1 genotype of E. granulosus in wild boar in Iran. Serological evaluation of hydatid cyst by antigen-B ELISA revealed E. granulosus antibodies in 5 (20%) of 25 wild boars. A statistically significant difference was observed between the prevalence of E. granulosus antibodies and gender while the difference between the seroprevalence of E. granulosus and age was insignificant. Findings of this study might have important implications for the prevention and control of cystic echinococcosis.
Partial sequence of mitochondrial ND1 gene was obtained from Echinococcus granulosus isolate from a wild boar (Sumy region, Ukraine). It has been found to be identical to the sequence of G7 (pig) strain of E. granulosus, which was earlier found in pigs from the same region. It is supposed that in some areas wild boars may support the existence and propagation of the pig strain of E. granulosus.
Partial sequence of mitochondrial ND1 gene was obtained from a hepatic cyst found in European beaver in the North-Eastern Poland. The sequence was identical to the previously published sequences of the G7 (pig) strain of Echinococcus granulosus. This is the first finding of the E. granulosus from European beaver.
Role of E. granulosus-specific IgG antibody avidity in evaluation of a natural history of the parasite cysts in the liver, duration of infection and immunogenic cysts activity was studied. Thirty-one patients with liver cysts suspected of echinococcosis were examined; E. Granulosus infection was finally confirmed by a fine needle aspiration biopsy or surgery in 29 cases (93.5%) and two non-parasitic simple cysts in the liver were diagnosed. E. granulosus-specific IgG antibody was found in 21 patients (67.7%). High IgG avidity values were observed in 14 patients with liver cysts in a degcneration stage confirmed by imaging techniques. Low IgG avidity values were mostly detected in children with hypoechogenic echinococcal cysts being in a recent stage of infection. Determination of anti-E. Granulosus immunoglobulin G antibody avidity is a very usefull diagnostic tool for a determination of parasitic cysts activity and their developmental age.
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