WATT PoultryUSA - October 2015 - 42

42 ❙ WATT POULTRY USA

■ ANALYSIS: AVIAN INFLUENZA
Perhaps just as important as freezing the situation is culling flocks immediately. She reported that affected flocks
were all put down the day infection with avian influenza
was confirmed. Bruschke said the Netherlands has a very
aggressive response to avian influenza - going beyond
EU regulations - because of the country's high concentration of poultry.
The initial halt on movements or "standstill" was kept
in place for 2.5 days, but when another farm broke with
avian flu just 24 hours later, a 72-hour standstill was put
in place. Movements of poultry and eggs were halted for
all but 24 hours in a 6.5 day period.
After the second standstill, the country was divided
into four regions and movements
were regulated within regions to
avoid, wherever possible, movement
of birds, eggs and feed from one region to another.

widespread outbreak the country experienced a decade
earlier and which the Upper Midwestern U.S. has suffered
in 2015.

EU perspective on avian flu
Dr. Francisco Javier Riviriego-Gordejo, head of
the sector disease control, European Commission; Dr.
Simon Hall, veterinary director, Animal and Plant Health
Agency, U.K.; Dr. Jorn Martin Gethmann, senior scientist,
Federal Research Institute for Animal Health, Germany;
and Bruschke sat on a panel to present details of the outbreaks in their respective countries and answer questions
regarding the recent avian influenza outbreaks in Europe.

MOVEMENTS OF POULTRY AND EGGS WERE
HALTED FOR ALL BUT 24 HOURS IN A 6.5 DAY PERIOD.

Pre-emptive culling for avian flu
Pre-emptive culling of all flocks within a 1 kilometer
zone around infected farms as well as any other "dangerous contact holdings" is exercised. An example of a
dangerous contact holding might be a farm that shares
equipment with an infected farm, receives eggs or birds
from an infected farm, or had some other type of contact
like sharing a vaccination or
insemination
crew recently. Bruschke said
this procedure
is based on modeling
work from the
2003 outbreak in the
Netherlands.
Ultimately, the
highly pathogenic
avian influenza
outbreak in the
Netherlands of
2014-15 infected
three table egg
laying farms, one
pullet farm and one
duck meat bird farm.
The control measures that
were implemented were sufficient to prevent the type of

Gethmann said that, in Germany, as in the rest of the EU,
all of the avian influenza mortalities and culled birds were
rendered. He said Germany enacted a 72-hour standstill after
the first outbreak farm was discovered, but that the standstill
was regional and didn't affect the entire country.
Similar to the Netherlands, Gethmann said all farms
that have contact with an infected farm are culled. He also
said that, because of concern for airborne transmission of
the virus, all farms within 1 kilometer of an infected farm
are culled.
Hall said the U.K. outbreak involved a flock of 7,000
breeding ducks that were near the end of their laying
cycle. He said the hatchery where the farm's eggs were
sent was tested and that all the eggs from the infected
flock were destroyed. Eggs from many other flocks in
the hatchery were also destroyed because they came
into contact with eggs from the infected farm.
"We destroyed a spectacular number of hatching eggs,"
Hall said.
All of the panel members agreed that early recognition
of the disease on affected farms, rapid culling, and stopping movement of poultry and poultry products are keys
to controlling an outbreak.
www.WATTAgNet.com ❙ October 2015


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