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Pathogen surveillance in Southern Ocean pinnipeds

Permanent lenke
https://hdl.handle.net/10037/20722
DOI
https://doi.org/10.33265/polar.v39.3841
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article.pdf (2.113Mb)
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Dato
2020-12-17
Type
Journal article
Tidsskriftartikkel
Peer reviewed

Forfatter
Núñez-Egido, Sandra; Lowther, Andrew; Nymo, Ingebørg H.; Klein, Jörn; Breines, Eva Marie; Tryland, Morten
Sammendrag
Knowledge of the health status and potential effect of disease outbreaks among Southern Ocean fauna may be decisive for its conservation. We assessed the exposure and infection of Antarctic fur seals (Arctocephalus gazella, AFS) and Southern elephant seals (Mirounga leonine, SES) to parapoxvirus, Phocid alphaherpesvirus-1 (PhHV-1), smooth Brucella spp. and Toxoplasma gondii. AFS (n = 65) serum and swab samples, and SES (n = 13) serum samples from the sub--Antarctic island of Bouvetøya (54°25’S, 03°22’E) were collected during two austral summers (2014/15, 2017/18). Three polymerase chain reaction (PCR) tests amplifying the DNA polymerase, B2L and GIF parapoxvirus genomic regions were performed, investigating DNA from mucosal swab samples. The glycoprotein B gene was targeted to detect PhHV-1 viral DNA. Sera were assayed for T. gondii and smooth Brucella spp. antibodies with indirect enzyme-linked immunosorbent assays. Parapoxvirus PCR amplicons of the expected size were generated in two of the 29 AFS pups (nasal swabs, 2014/15), targeting the B2L (n = 2) and DNA polymerase (n = 1) genes, whereas the GIF PCR did not amplify target sequences. The PCR amplicons were sequenced and blasted in GenBank, revealing highest similarity with a seal parapoxvirus, confirming the presence of the virus in AFS for the first time. No PhHV-1 amplicons were generated, and antibodies against T. gondii or smooth Brucella spp. were not detected. Our data indicate that these seals are host for parapoxvirus but are neither exposed to smooth Brucella spp. nor T. gondii. Evidence of PhHV-1 shedding was not detected.
Forlag
Norsk Polarinstitutt
Sitering
Núñez-Egido, Lowther, Nymo, Klein, Breines EM, Tryland M. Pathogen surveillance in Southern Ocean pinnipeds. Polar Research. 2020;39:1-11
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  • Artikler, rapporter og annet (arktisk og marin biologi) [1636]
Copyright 2020 The Author(s)

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