Lamprey (Geotria australis; Agnatha) reddening syndrome in Southland rivers, New Zealand 2011–2013: laboratory findings and epidemiology, including the incidental detection of an atypical Aeromonas salmonicida

C.L. Brosnahan; A. Pande; S.E. Keeling; M. van Andel; J.B. Jones

doi:10.1080/00288330.2018.1556167

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Lamprey (Geotria australis; Agnatha) reddening syndrome in Southland rivers, New Zealand 2011–2013: laboratory findings and epidemiology, including the incidental detection of an atypical Aeromonas salmonicida

Journal article

Peer reviewed

Lamprey (Geotria australis; Agnatha) reddening syndrome in Southland rivers, New Zealand 2011–2013: laboratory findings and epidemiology, including the incidental detection of an atypical Aeromonas salmonicida

C.L. Brosnahan, A. Pande, S.E. Keeling, M. van Andel and J.B. Jones

New Zealand Journal of Marine and Freshwater Research, Vol.53(3), pp.416-436

2018

DOI: https://doi.org/10.1080/00288330.2018.1556167

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Abstract

From 2011, lamprey (Geotria australis) populations in Southland, New Zealand have been affected by reddening along the length of the body and increased mortalities, termed lamprey reddening syndrome (LRS). Molecular testing, bacteriology, histopathology and epidemiology were used to determine if an infectious agent was present and to increase the understanding of this syndrome. An atypical Aeromonas salmonicida was detected from affected lamprey in 2011. This organism has not previously been reported from New Zealand. Investigative molecular testing indicated the organism was an uncharacterised, unculturable, atypical A. salmonicida and a likely incidental finding. Histopathology did not indicate an infectious process was involved, but suggested the reddening may be due to blunt trauma. Epidemiological investigation found the Mokoreta River had a significantly higher prevalence of LRS than others in the Southland region, but there was no clear reason why. To date, no infectious aetiology for this syndrome has been identified.

Details

Title: Lamprey (Geotria australis; Agnatha) reddening syndrome in Southland rivers, New Zealand 2011–2013: laboratory findings and epidemiology, including the incidental detection of an atypical Aeromonas salmonicida
Authors/Creators: C.L. Brosnahan (Author/Creator) - Ministry for Primary Industries
A. Pande (Author/Creator) - Ministry for Primary Industries
S.E. Keeling (Author/Creator) - Ministry for Primary Industries
M. van Andel (Author/Creator) - Ministry for Primary Industries
J.B. Jones (Author/Creator) - Murdoch University
Publication Details: New Zealand Journal of Marine and Freshwater Research, Vol.53(3), pp.416-436
Publisher: Taylor and Francis Ltd
Identifiers: 991005543199907891
Copyright: © 2018 The Royal Society of New Zealand
Murdoch Affiliation: School of Veterinary and Life Sciences
Language: English
Resource Type: Journal article

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Collaboration types: International collaboration
Citation topics: 1 Clinical & Life Sciences; 1.42 Bacteriology; 1.42.853 Aquatic Pathogens
Web Of Science research areas: Fisheries; Marine & Freshwater Biology; Oceanography
ESI research areas: Plant & Animal Science