Natural and Experimental Persistence of Highly Pathogenic H5 Influenza Viruses in Slurry of Domestic Ducks, with or without Lime Treatment.
Animal Husbandry
Animals
Calcium Compounds
/ pharmacology
Communicable Disease Control
/ methods
Ducks
France
Industrial Waste
Influenza A Virus, H5N8 Subtype
/ isolation & purification
Influenza in Birds
/ prevention & control
Oxides
/ pharmacology
Poultry Diseases
/ prevention & control
Wastewater
/ virology
H5HP
avian influenza
duck
lime treatment
persistence
slurry
Journal
Applied and environmental microbiology
ISSN: 1098-5336
Titre abrégé: Appl Environ Microbiol
Pays: United States
ID NLM: 7605801
Informations de publication
Date de publication:
24 11 2020
24 11 2020
Historique:
received:
16
09
2020
accepted:
21
09
2020
pubmed:
4
10
2020
medline:
22
12
2020
entrez:
3
10
2020
Statut:
epublish
Résumé
Infections by A/H5 and A/H7 avian influenza viruses (AIVs) can cause acute disease and are therefore notifiable in poultry and wild birds. During winter 2015-2016, several cases of infection caused by highly pathogenic (HP) AIVs belonging to the A/H5N1, A/H5N2, and A/H5N9 subtypes were detected in southwestern France. Throughout winter 2016-2017, several cases of infections caused mainly by A/H5N8 HP AIV (A/goose/GD/1/1996, clade 2.3.4.4) were detected across Europe. On both occasions, the viruses were widely detected on palmiped farms in France. This study was designed to evaluate the persistence of A/H5 HP AIV in slurry from various duck productions. This was achieved (i) in the laboratory setting by artificially spiking four AIV-free slurry samples with known amounts of A/H5N9 HP AIV and monitoring virus infectivity, with or without lime treatment to achieve pH 10 or pH 12, and (ii) by sampling slurry tanks on five naturally A/H5N8 HP-contaminated farms. Experimental results in artificially spiked slurry suggested virus survival for 4 weeks in slurry from Muscovy or Pekin duck breeders and for 2 weeks in slurry from ducks for foie gras production during the assisted-feeding period, without lime treatment. Persistence of infectious A/H5N9 HP AIV in all slurry samples after lime treatment at pH 10 or pH 12 was less than 1 week. The A/H5N8 HP AIV persisted in naturally contaminated untreated slurry for 7 weeks. The results obtained provide experimental support for the 60-day storage period without treatment or the 7-day interval after lime treatment defined in French regulations for slurry sanitization.
Identifiants
pubmed: 33008818
pii: AEM.02288-20
doi: 10.1128/AEM.02288-20
pmc: PMC7688237
pii:
doi:
Substances chimiques
Calcium Compounds
0
Industrial Waste
0
Oxides
0
Waste Water
0
lime
C7X2M0VVNH
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Informations de copyright
Copyright © 2020 Schmitz et al.
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