In the Spotlight: Recent Disease Investigation from Wildlife Disease Association Newsletter
Nordic Section Quarterly Report of Wildlife Disease Incidents for April, May and June 2011
Severe nose bot fly infestation in a wild reindeer flock in Southern Norway
In the July 2011 Wildlife Disease Association newsletter, Bjørnar Ytrehus and Kjell Handeland from the Norwegian Veterinary Institute submitted the following disease report summary.
In the middle of May 2011 a hunter observed a flock of 30-40 wild tundra reindeer on the southern part of Hardangervidda ( 8° E, 60°N) showing signs of lethargy, respiratory distress and complete lack of fear. On close view he observed “worms creeping out of the nose of them”.

The local wildlife manager was urged to follow the affected reindeer flock, but it could not be reloacted. A few other small flocks that were observed did not show any obvious signs of disease.
The nose bot fly is a common problem in domesticated reindeer herds in northern Norway, and there are large variations in infection levels between years, districts and individuals (Nilsen, 1995). Little is known about the impact of this infestation in the wild reindeer populations in southern Norway. However, the clinical signs observed in the reported flock may indicate severe health distress by heavy infestation, possibly most pronounced when the third-stage larvae are in the migratory process of leaving the host.