Sarcocystis neurona Transmission from Opossums to Marine Mammals in the Pacific Northwest.
Groundwater
Marine mammals
Opossums
Sarcocystis neurona
Transmission
Watershed
Journal
EcoHealth
ISSN: 1612-9210
Titre abrégé: Ecohealth
Pays: United States
ID NLM: 101222144
Informations de publication
Date de publication:
03 2021
03 2021
Historique:
received:
25
06
2020
accepted:
05
05
2021
revised:
21
04
2021
pubmed:
3
7
2021
medline:
2
4
2022
entrez:
2
7
2021
Statut:
ppublish
Résumé
Increasing reports of marine mammal deaths have been attributed to the parasite Sarcocystis neurona. Infected opossums, the only known definitive hosts, shed S. neurona sporocysts in their feces. Sporocysts can contaminate the marine environment via overland runoff, and subsequent ingestion by marine mammals can lead to fatal encephalitis. Our aim was to determine the prevalence of S. neurona in opossums from coastal areas of Washington State (USA) and to compare genetic markers between S. neurona in opossums and marine mammals. Thirty-two road-kill opossums and tissue samples from 30 stranded marine mammals meeting inclusion criteria were included in analyses. Three opossums (9.4%) and twelve marine mammals (40%) were confirmed positive for S. neurona via DNA amplification at the ITS1 locus. Genetic identity at microsatellites (sn3, sn7, sn9) and the snSAG3 gene of S. neurona was demonstrated among one harbor porpoise and two opossums. Watershed mapping further demonstrated plausible sporocyst transport pathways from one of these opossums to the location where an infected harbor porpoise carcass was recovered. Our results provide the first reported link between S. neurona genotypes on land and sea in the Pacific Northwest, and further demonstrate how terrestrial pathogen pollution can impact the health of marine wildlife.
Identifiants
pubmed: 34213686
doi: 10.1007/s10393-021-01536-w
pii: 10.1007/s10393-021-01536-w
pmc: PMC8367900
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
84-94Informations de copyright
© 2021. The Author(s).
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