Are brown trout Salmo trutta fario and rainbow trout Oncorhynchus mykiss two of a kind? A comparative study of salmonids to temperature-influenced Tetracapsuloides bryosalmonae infection.

Bailey, Christyn John; Schmidt-Posthaus, Heike; Segner, Helmut; Wahli, Thomas; Strepparava, Nicole (2018). Are brown trout Salmo trutta fario and rainbow trout Oncorhynchus mykiss two of a kind? A comparative study of salmonids to temperature-influenced Tetracapsuloides bryosalmonae infection. Journal of fish diseases, 41(2), pp. 191-198. Wiley-Blackwell 10.1111/jfd.12694

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Proliferative kidney disease (PKD) of salmonids caused by Tetracapsuloides bryosalmonae causes high mortalities of wild brown trout (Salmo trutta fario) and farmed rainbow trout (Oncorhynchus mykiss) at elevated water temperatures. Here the aim was to compare the temperature-dependent modulation of T. bryosalmonae in the two salmonid host species, which display different temperature optima. We used a novel experimental set-up in which we exposed brown trout and rainbow trout to an identical quantified low concentration of T. bryosalmonae for a short time period (1 hr). We followed the development of the parasite in the fish hosts for 70 days. PKD prevalence and parasite kinetics were assessed using qPCR. Exposures were performed at temperatures (12°C and 15°C) that reflect an environmental scenario that may occur in the natural habitat of salmonids. T. bryosalmonae infection was confirmed earliest in brown trout kept at 15°C (day 7 post-exposure) while, in all other groups, T. bryosalmonae was not confirmed until day 15 post-exposure. Moreover, significantly greater infection prevalence and a faster increase of parasite intensity were observed in brown trout kept at 15°C than in all other groups. These results indicate that PKD is differentially modulated by water temperature in related host species.

Item Type:

Journal Article (Original Article)

Division/Institute:

05 Veterinary Medicine > Research Foci > Host-Pathogen Interaction
05 Veterinary Medicine > Department of Infectious Diseases and Pathobiology (DIP)
05 Veterinary Medicine > Department of Infectious Diseases and Pathobiology (DIP) > Center for Fish and Wildlife Health (FIWI)

UniBE Contributor:

Bailey, Christyn John; Schmidt-Posthaus, Heike; Segner, Helmut; Wahli, Thomas and Strepparava, Nicole

Subjects:

500 Science > 570 Life sciences; biology
600 Technology > 630 Agriculture

ISSN:

0140-7775

Publisher:

Wiley-Blackwell

Language:

English

Submitter:

Achim Braun Parham

Date Deposited:

05 Jun 2019 10:37

Last Modified:

05 Jun 2019 10:37

Publisher DOI:

10.1111/jfd.12694

PubMed ID:

28914447

Uncontrolled Keywords:

Tetracapsuloides bryosalmonae brown trout proliferative kidney disease rainbow trout temperature

BORIS DOI:

10.7892/boris.129619

URI:

https://boris.unibe.ch/id/eprint/129619

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