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An autochthonous case of cystic echinococcosis in Finland, 2015.

https://arctichealth.org/en/permalink/ahliterature271261
Source
Euro Surveill. 2015;20(42)
Publication Type
Article
Date
2015
Author
Sari Hämäläinen
Anu Kantele
Miika Arvonen
Tapio Hakala
Jari Karhukorpi
Jukka Heikkinen
Ensio Berg
Kari Vanamo
Erja Tyrväinen
Tarja Heiskanen-Kosma
Antti Oksanen
Antti Lavikainen
Source
Euro Surveill. 2015;20(42)
Date
2015
Language
English
Publication Type
Article
Keywords
Animals
Child
Dogs - parasitology
Echinococcosis, Pulmonary - diagnosis - parasitology - surgery
Echinococcus - genetics - isolation & purification
Finland
Genotype
Humans
Male
Pleural effusion
Radiography, Thoracic
Tomography, X-Ray Computed
Treatment Outcome
Ultrasonography
Abstract
We report a case of pulmonary cystic echinococcosis in a child from eastern Finland with no history of travelling abroad. The cyst was surgically removed and the organism molecularly identified as Echinococcus canadensis genotype G10. This parasite is maintained in eastern Finland in a sylvatic life cycle involving wolves and moose; in the present case, the infection was presumably transmitted by hunting dogs.
PubMed ID
26538367 View in PubMed
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Echinococcus canadensis transmission in the North.

https://arctichealth.org/en/permalink/ahliterature265293
Source
Vet Parasitol. 2015 Jul 31;
Publication Type
Article
Date
Jul-31-2015
Author
Antti Oksanen
Antti Lavikainen
Source
Vet Parasitol. 2015 Jul 31;
Date
Jul-31-2015
Language
English
Publication Type
Article
Abstract
The Echinococcus granulosus complex (EG) is the causative agent of cystic echinococcosis (CE). Northern cervid Echinococcus was previously suggested to be the ancestor of the entire EG. During the last century, it was regarded to have three (or four) different, but often overlapping, transmission cycles in the circumpolar North: the original wolf-wild cervid (reindeer or elk)-cycle; the semi-synanthropic cycle involving sled and hunting dogs and wild cervids; and the synanthropic cycle involving herding dogs and semi-domesticated reindeer. Human infections mainly derived from the latter two cycles. In Fennoscandia, the synanthropic cycle has been eliminated during the last 50 years due to changes in reindeer husbandry methods; machinery making herding dogs largely redundant. Typical to human CE in the North has been the relatively benign nature of the disease compared with CE caused by E. granulosus sensu stricto. The metacestodes in humans and in the natural cervid hosts predominantly appear in the lungs. The causative agents have been identified as EG mitochondrial genotypes G8 and G10, now together with G6 (camel), G7 (pig) and G9 genotypes constituting the Echinococcus canadensis species. Based on recent findings in reindeer in Yakutia, G6 might also be recognised among cervid genotypes. The geographical distribution of both G8 and G10 is circumpolar, with G10 currently apparently more prevalent both in the Palearctic and Nearctic. Because of the disappearance of the working dog, E. canadensis in Fennoscandia is again highly dependent on the wolf, as it was before domestication of the dog. Pet and sled dogs, if their number further increases, may to a minor part participate in the life cycle. Human CE in the North was mostly diagnosed by mass chest tuberculosis radiography campaigns, which have been discontinued.
PubMed ID
26264249 View in PubMed
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