Subclinical Listonella anguillarum infection does not impair recovery of swimming performance in rainbow trout Oncorhynchus mykiss

• Author(s) / Creator(s)

  • Farrell, A.P.
  • Tierney, K.B.
  • Balfry, S.K.

• This study examines whether injections of the commonly used bacterial-challenge pathogen Listonella anguillarum (formerly Vibrio anguillarum) negatively impact the ability of rainbow trout Oncorhynchus mykiss Walbaum to perform repeat swimming trials. Fish were given intraperitoneal injections of either a sub-lethal (105 colony forming units; CFUs) or a lethal (107 CFUs) dose of L. anguillarum, held for 48 h, and then given 2 successive ramp critical swimming speed (Ucrit) tests separated by 45 min. Compared with saline-injected control fish, the low-dose injection did not significantly impair swimming performance and recovery. Similarly, Ucrit and re-performance for fish surviving the high-dose injection were comparable to control (2 of 6 fish died after injection and before testing). In contrast, a positive control test of seawater challenge did impair recovery of swimming performance. In view of these results and common use of L. anguillarum as a challenge pathogen for toxicological studies, it seems unlikely that the consequences of pathogenesis impact the important cardiorespiratory changes associated with exercise.

• Date created

  2005

• Subjects / Keywords

  • Listonella anguillarum
  • Ucrit
  • Recovery
  • Vibriosis
  • Swimming performance
  • Critical swimming speed
  • Seawater

• Type of Item

  Article (Published)

• DOI

  https://doi.org/10.7939/R3Q52FQ14

• License

  Copyright Inter-Research 2005 · www.int-res.com