Related Experiment Video
Updated: May 21, 2026
Necropsy-based Wild Fish Health Assessment
Published on: September 11, 2018
Swimbladder Leiomyosarcoma in Atlantic salmon (Salmo salar) in North America
Paul R Bowser1, James W Casey, Rufina N Casey
1Aquatic Animal Health Program, Department of Microbiology and Immunology, College of Veterinary Medicine, Cornell University, Ithaca, New York 14853-6401, USA. prb4@cornell.edu
Abstract:
Leiomyosarcoma with associated retrovirus were found in North America for the first time in adult Atlantic salmon (Salmo salar) held in a quarantine facility at the North Attleboro National Fish Hatchery (NANFH), Massachusetts, USA. The fish had been collected as age 1-2 yr animals from the Pleasant River, Maine, and were to be used as brood stock in a population augmentation program for that river. Neoplastic disease was observed at NANFH initially in older (age 4 yr) fish, followed by age 3 yr fish. Disease was not observed in age 2 yr fish. The mortality pattern was chronic.
