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Evidence of land-sea transfer of the zoonotic pathogen Campylobacter to a wildlife marine sentinel species

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Evidence_of_land_sea_transfer_of_the_zoonotic_pathogen_Campylobacter.pdf (597.7Kb)
Date
01/2015
Author
Baily, J.L.
Méric, G.
Bayliss, S.
Foster, G.
Moss, S.E.
Watson, E.
Pascoe, B.
Mikhail, J.
Pizzi, R.
Goldstone, R.J.
Smith, D.G.E.
Willoughby, K.
Hall, A.J.
Sheppard, S.K.
Dagleish, M.P.
Funder
NERC
Grant ID
Agreement R8-H12-86
Keywords
Campylobacter
Environmental health
Genomics
Grey seals
Source attribution
QL Zoology
QH301 Biology
NDAS
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Abstract
Environmental pollution often accompanies the expansion and urbanization of human populations where sewage and wastewaters commonly have an impact on the marine environments. Here, we explored the potential for faecal bacterial pathogens, of anthropic origin, to spread to marine wildlife in coastal areas. The common zoonotic bacterium Campylobacter was isolated from grey seals (Halichoerus grypus), an important sentinel species for environmental pollution, and compared to isolates from wild birds, agricultural sources and clinical samples to characterize possible transmission routes. Campylobacter jejuni was present in half of all grey seal pups sampled (24/50 dead and 46/90 live pups) in the breeding colony on the Isle of May (Scotland), where it was frequently associated with histological evidence of disease. Returning yearling animals (19/19) were negative for C. jejuni suggesting clearance of infection while away from the localized colony infection source. The genomes of 90 isolates from seals were sequenced and characterized using a whole-genome multilocus sequence typing (MLST) approach and compared to 192 published genomes from multiple sources using population genetic approaches and a probabilistic genetic attribution model to infer the source of infection from MLST data. The strong genotype-host association has enabled the application of source attribution models in epidemiological studies of human campylobacteriosis, and here assignment analyses consistently grouped seal isolates with those from human clinical samples. These findings are consistent with either a common infection source or direct transmission of human campylobacter to grey seals, raising concerns about the spread of human pathogens to wildlife marine sentinel species in coastal areas.
Citation
Baily , J L , Méric , G , Bayliss , S , Foster , G , Moss , S E , Watson , E , Pascoe , B , Mikhail , J , Pizzi , R , Goldstone , R J , Smith , D G E , Willoughby , K , Hall , A J , Sheppard , S K & Dagleish , M P 2015 , ' Evidence of land-sea transfer of the zoonotic pathogen Campylobacter to a wildlife marine sentinel species ' , Molecular Ecology , vol. 24 , no. 1 , pp. 208-221 . https://doi.org/10.1111/mec.13001
Publication
Molecular Ecology
Status
Peer reviewed
DOI
https://doi.org/10.1111/mec.13001
ISSN
0962-1083
Type
Journal article
Rights
This is the peer reviewed version of the following article: Evidence of land-sea transfer of the zoonotic pathogen Campylobacter to a wildlife marine sentinel species Baily, J. L., Méric, G., Bayliss, S., Foster, G., Moss, S. E., Watson, E., Pascoe, B., Mikhail, J., Pizzi, R., Goldstone, R. J., Smith, D. G. E., Willoughby, K., Hall, A. J., Sheppard, S. K. & Dagleish, M. P. Jan 2015 In : Molecular Ecology. 24, 1, p. 208-221, which has been published in final form at http://dx.doi.org/10.1111/mec.13001. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Description
This work and JLB's PhD studentship were funded by the Moredun Research Institute and the Royal Zoological Society of Scotland. SKS is funded by the Biotechnology and Biological Sciences Research Council (BBSRC), the Medical Research Council (MR/L015080/1) and the Wellcome Trust. Date of Acceptance: 13/11/2014
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  • University of St Andrews Research
URL
http://onlinelibrary.wiley.com/doi/10.1111/mec.13001/suppinfo
URI
http://hdl.handle.net/10023/7956

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