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The morphology of the filaroid nematode Setaria tundra, the cause of peritonitis in reindeer Rangifer tarandus

Published online by Cambridge University Press:  01 March 2007

S. Nikander ,
S. Laaksonen ,
S. Saari  and
A. Oksanen
S. Nikander
Affiliation:
Department of Basic Veterinary Sciences (FINPAR), PO Box 66, FIN-00014University of Helsinki, Finland:
S. Laaksonen
Affiliation:
Finnish Food Safety Authority Evira, Oulu Research Unit (FINPAR), PO Box 517, FIN-90101 Oulu, Finland
S. Saari*
Affiliation:
Department of Basic Veterinary Sciences (FINPAR), PO Box 66, FIN-00014University of Helsinki, Finland:
A. Oksanen
Affiliation:
Finnish Food Safety Authority Evira, Oulu Research Unit (FINPAR), PO Box 517, FIN-90101 Oulu, Finland
*
*Author for correspondence Fax: +358 9 191 57033 E-mail: seppo.saari@helsinki.fi
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Abstract

In Finland during 2003–2005, large numbers of nematodes, tentatively identified as Setaria sp., were observed in the peritoneal cavity of reindeer Rangifer tarandus during a peritonitis outbreak associated with poor body condition. The morphology of worms recovered from slaughtered reindeer is described based on light and scanning electron microscopy. Worms were confirmed as belonging to the superfamily Filarioidea by the presence of microfilariae-producing females and the size and the shape of the male spicules. Further classification to the genus Setaria was based on the location of worms in the peritoneal cavity and the morphology of spicules and the peribuccal crown. The present measurements correlate with those in the description of Setaria tundra by Rajewsky (1929) and only minor differences were present compared with descriptions of key parts of identification of S. yehi from the American white-tailed deer Odocoileus virginianus and mule deer O. hemionus. Current morphological findings support our earlier studies employing a polymerase chain reaction and confirm the occurrence S. tundra in reindeer in Finland.

Type
Research Papers
Information
Journal of Helminthology , Volume 81 , Issue 1 , March 2007 , pp. 49 - 55
Copyright
Copyright © 2007 Cambridge University Press 2007

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