Update on chronic wasting disease (CWD) III.
cervids
chronic
risk
strain
wasting
zoonotic
Journal
EFSA journal. European Food Safety Authority
ISSN: 1831-4732
Titre abrégé: EFSA J
Pays: United States
ID NLM: 101642076
Informations de publication
Date de publication:
Nov 2019
Nov 2019
Historique:
entrez:
7
7
2020
pubmed:
7
7
2020
medline:
7
7
2020
Statut:
epublish
Résumé
The European Commission asked EFSA for a Scientific Opinion: to revise the state of knowledge about the differences between the chronic wasting disease (CWD) strains found in North America (NA) and Europe and within Europe; to review new scientific evidence on the zoonotic potential of CWD and to provide recommendations to address the potential risks and to identify risk factors for the spread of CWD in the European Union. Full characterisation of European isolates is being pursued, whereas most NA CWD isolates have not been characterised in this way. The differing surveillance programmes in these continents result in biases in the types of cases that can be detected. Preliminary data support the contention that the CWD strains identified in Europe and NA are different and suggest the presence of strain diversity in European cervids. Current data do not allow any conclusion on the implications of strain diversity on transmissibility, pathogenesis or prevalence. Available data do not allow any conclusion on the zoonotic potential of NA or European CWD isolates. The risk of CWD to humans through consumption of meat cannot be directly assessed. At individual level, consumers of meat, meat products and offal derived from CWD-infected cervids will be exposed to the CWD agent(s). Measures to reduce human dietary exposure could be applied, but exclusion from the food chain of whole carcasses of infected animals would be required to eliminate exposure. Based on NA experiences, all the risk factors identified for the spread of CWD may be associated with animals accumulating infectivity in both the peripheral tissues and the central nervous system. A subset of risk factors is relevant for infected animals without involvement of peripheral tissues. All the risk factors should be taken into account due to the potential co-localisation of animals presenting with different disease phenotypes.
Identifiants
pubmed: 32626163
doi: 10.2903/j.efsa.2019.5863
pii: EFS25863
pmc: PMC7008890
doi:
Types de publication
Journal Article
Langues
eng
Pagination
e05863Informations de copyright
© 2019 European Food Safety Authority. EFSA Journal published by John Wiley and Sons Ltd on behalf of European Food Safety Authority.
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