Findings
in 2014 –2015
In
early 2014, the People's Republic of China, Japan and the Republic of
Korea
reported
outbreaks of novel Eurasian (EA) H5N8-reassortant clade
2.3.4.4viruses in migratory birds and domestic poultry.
This
H5N8 lineage of viruses has been characterized as highly pathogenic
avian influenza in poultry (HPAI) and to date has not been reported
to cause disease in humans or other mammalian species.
By
November 2014, there were multiple reports of the H5N8 clade 2.3.4.4
in wild birds
from
South Korea, Japan, Russia, Germany, Netherlands, and North America.
In
several countries, the same viruses caused outbreaks in poultry
Findings in 2016
In
2016, cases of a new H5N8 reassortant were reported in wild birds
in March in Republic of Korea; in June in Russia; in November in
India; in ten countries of Europe (Austria, Croatia, Denmark,
Germany, Hungary, Poland, Switzerland, Sweden, Finland and
Netherlands) and two countries in the middle east (Israel and Iran)
in November.
Affected
domestic animals include
chickens,(Gallus
domesticus), Kotikana, kyckling
ducks,
(Anatidae, Anseriformes), Ankkalintuja,
andfåglar
turkeys, (Meleagris
gallopavo), Kalkkuna,Kalkon ;
and
wild bird species include
common
pochard (Aythya ferina),Punasotka, Brunand, Taffeland
tufted
duck (Aythya fuligula) Tukkasotka, Vigg, Troldand
swans
(Cygnus sp.), Joutsenlaji
gull
(Laridae sp.), Lokkilaji
common
coot (Fulica atra), Nokikana, Sothöna,Blishöne
storks
(Ciconiidae sp.),Kattohaikaralaji, stork
greyheron
(Ardea cinerea), Harmaahaikara, Gråhäger, Fiskehejre
great
crested grebe (Podiceps
cristatus), Silkkiuikku, Skäggdopping,
Toppet lappedykker
black-headed
gull (Chroicocephalus ridibundus), Naurulokki, Skrattmås,
Haettemåge
common
tern (Sterna hirundo), Kalatiira, Fisktärna, Fjordterne
great
cormorant (Phalacrocorax carbo), Merimetso, Storskarv,
Skarv
painted
stork (Mycteria leucocephala),( Intian ibishaikara),Indisk
ibisstork, Indisk Skovstork, Buntstorch
pelican
(Pelecanus sp.), Pelikaanilaji, pelikanart, pelikan
munia
bird (Lonchura), Loistopeipot manikit (Lonchura),
en smuk lille finkeagtig fugl, Estrildid Finch, Prachtfink
crow
(Corvus sp.),Varislintulaji , kråkfågelart, Kragefugle
common
buzzard (Buteo buteo), Hiirihaukka, Ormvråk,
Musvåge
common
goldeneye (Bucephala clangula), Telkkä, Knipa, Hvinand
little
grebe (Tachybaptus ruficollis), Pikku-uikku,
Smådopping, Lille lappedykker
common
moorhen (Gallinula chloropus), Liejukana, Rörhöna,
Groenbenet roerhoene
yellow-legged
gull (Larus
michahellis),Etelänharmaalokki
((Aroharmaalokin
alalaji), Medelhavstrut ,
Middelhavsmåge
peregrine
falcon (Falco peregrinus),Muuttohaukka, Pilgrimsfalk, Vandrefalk
been
goose (Anser fabalis), Metsähanhi, Sädgås,Saedgås
and
other wild duckspecies (Anatidae sp.), Villiankkalajeja, vilda
andfåglar,
Highly
pathogenic avian influenza H5N6, a related virus that is also in the
clade 2.3.4.4
that
was previously found in China, Vietnam and Laos, was found for the
first time in
Republic
of Korea and Japan from dead wild birds, captive animals (Japan only)
and
poultry
(Korea only). It should be noted that this group of H5N6 viruses has
been associated with human infection,including a number of deaths.
Further
information regarding circulation of the EA-H5N8clade 2.3.4.4 and
subsequent
reassortants
will further improve understanding of the epidemiology for these
unique
viruses.
Countries
are urged to share findings from surveillance activities that can
help fill in these gaps.
Wild
Bird Movements
The
majority of wild bird migration across Europe, Africa and Asia
subsides in November
for
the winter season. While wintering locations of these migratory birds
are
often
stable, additional movement within a region may be affected by local
weather
conditions,
food resources, access to open water, etc.
Strategic
wild-bird surveillance planning and enhanced messaging to poultry
farmers to
strengthen
biosecurity practices before spring migration is warranted,
especially if the
virus
persists over the winter in Europe, North America, and EastAsia.
Detections
in indoor poultry farms where direct contact with wild birds has been
considered negligible emphasizes indirect transmission to these
production sectors
from
contaminated environments via fomites or by air, further highlighting
the ability of these viruses to persist in the natural environments.
Wild
bird surveillance
In
general, ongoing wild bird surveillance for avian influenza viruses
is
encouraged
and may help fill gaps in knowledge about circulating
influenza
viruses.
Based
upon recent events, OFFLU recommends continuing and strengthening
targeted
wild bird surveillance activities in areas where EA-H5 clade 2.3.4.4
viruses
have
been detected and in other areas where there are significant
populations of migratory waterfowl.
Currently
these areas include Asia, Europe, Africa and the Middle East.
Best
practice guidelines established by FAO and OFFLU, including the
FAO’s
Manual on Wild Bird Highly Pathogenic Avian Influenza Surveillance
and
the OFFLU Strategy document for surveillance and monitoring of
influenzas in animals
can
be consulted to aid in surveillance strategiesand techniques.
There
are several real-time RT-PCR protocols available for detection of
EA-H5 clade 2.3.4.4 viruses and other avian influenzaviruses.
Muistiin 11.1.2017 OIE
lähteestä . Etsin suomalaista, ruotsalaista ja tanskalaista linnun nimen vastinetta engl. ja latinalaisen lisäksi.
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