First report of (French heartworm) in red foxes ( on Prince Edward Island.

Objective: To identify first-stage nematode larvae (L1) recovered from a red fox scat sample and adult female worms recovered from 2 red fox lungs at necropsy, using published molecular methods to confirm a morphological diagnosis of (French heartworm).

Animal: Red fox .

Procedure: Nematode larvae recovered from a Baermann examination survey of wild canid scats ( = 101) conducted from January 2017 to August 2020, were identified by size and morphology and subjected to PCR and DNA sequencing of the small subunit (SSU) rRNA gene, the large subunit (LSU) rRNA gene, or the second internal transcribed spacer (ITS2).