Investigations into the temporal development of epitheliocystis infections in brown trout: a histological study.

Guevara Soto, Maricruz; Vidondo Curras, Beatriz; Vaughan, L; Rubin, J-F; Segner, Helmut; Samartin, Stéphanie; Schmidt-Posthaus, Heike (2017). Investigations into the temporal development of epitheliocystis infections in brown trout: a histological study. Journal of fish diseases, 40(6), pp. 811-819. Blackwell 10.1111/jfd.12562

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Epitheliocystis in Swiss brown trout (Salmo trutta) is a chlamydial infection, mainly caused by Candidatus Piscichlamydia salmonis and Candidatus Clavichlamydia salmonicola. To gain a better understanding of the temporal development of infections in wild brown trout, we investigated epitheliocystis infections during the course of the summer and autumn months of a single year (2015), and compared this to sampling points over the span of the years 2012-2014. The survey focused on tributaries (Venoge and Boiron) of the Rhone flowing in to Lake Geneva. When evaluated histologically, epitheliocystis infections were found throughout the period of investigation with the exception of the month of June. Fifty to 86 animals per sampling were investigated. Highest prevalence and infection intensities were seen in September. A correlation between epitheliocystis infection and water temperatures was not evident. Interyear comparison revealed consistent levels of prevalence and infection intensities in late summer. The absence of infections in June, combined with the consistent interyear results, indicates seasonal fluctuation of epitheliocystis infections in brown trout with a reservoir persisting during winter months from which infections can re-initiate each year. This could either be at levels below detection limits within the brown trout population itself or in an alternative host.

Item Type:

Journal Article (Original Article)

Division/Institute:

05 Veterinary Medicine > Research Foci > Veterinary Public Health / Herd Health Management
05 Veterinary Medicine > Department of Clinical Research and Veterinary Public Health (DCR-VPH) > Veterinary Public Health Institute
05 Veterinary Medicine > Department of Infectious Diseases and Pathobiology (DIP)
05 Veterinary Medicine > Department of Clinical Research and Veterinary Public Health (DCR-VPH)
05 Veterinary Medicine > Department of Infectious Diseases and Pathobiology (DIP) > Center for Fish and Wildlife Health (FIWI)

UniBE Contributor:

Guevara Soto, Maricruz; Vidondo Curras, Beatriz; Segner, Helmut; Samartin, Stéphanie and Schmidt-Posthaus, Heike

Subjects:

600 Technology > 630 Agriculture

ISSN:

0140-7775

Publisher:

Blackwell

Language:

English

Submitter:

Susanne Agnes Lerch

Date Deposited:

06 Sep 2017 13:02

Last Modified:

06 Sep 2017 13:02

Publisher DOI:

10.1111/jfd.12562

PubMed ID:

27670837

Uncontrolled Keywords:

brown trout epitheliocystis interyear comparison season temperature

BORIS DOI:

10.7892/boris.96500

URI:

https://boris.unibe.ch/id/eprint/96500

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