Dl2—Lancaster Farming, Saturday, September 10,1983
Md. poultry growers cautioned on Avian
COLLEGE PARK, Md. - In
stead of running its course, as
expected, avian influenza con
tinues to loom as serious health
threat for poultry flocks on the
Delmarva peninsula.
That’s the word from Dr. Ed
ward T. Mallinson, Extension
poultry veterinarian at the
University of Maryland in College
Park.
Or. Mallinson notes that, so far,
the malady has been restricted to
the northern half of nearby Lan
caster County, where the number
of infected broiler and layer flocks
has increased from 10 in early July
to 17 by early August.
With nearly 2 million birds in
volved in the infected flocks, the
southeast Pennsylvania situation
represents the nation’s largest
outbreak of avian influenza among
chickens in nearly 50 years,
Mallinson said. He is an associate
professor in the Virginia-Maryland
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In late July, Maryland’s Dr.
Mallinson noted at a luncheon
While not a health hazard to
consumers of poultry and eggs, the
virus disease has caused mortality
rates among Pennsylvania flocks,
ranging from 2.5 to 15 percent for
broilers and up to 2 percent for
layers. Egg production drops in
infected layer flocks have ranged
from 4 to 40 percent, with many in
the range of 10 to 30 percent.
In Maryland, the situation is of
most immediate concern to poultry
producers in Cecil and Kent
counties where the population of
layers has jumped from almost
nothing to more than two million in
the last five years. Carroll county,
which likewise borders Penn
sylvania, also has a large
population of layers.
And, there is an ever-present
threat of the disease moving down
Maryland’s Eastern Shore as a
scourge to the big Delmarva
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IN late July, Maryland’s Dr.
Mallinson noted at a luncheon
meeting in Salisbury that
waterfowl while relatively
resistant themselves are major
carriers of avian influenza. Thus,
he foresaw increased possibility of
a disease outbreak among
Delmarva broiler flocks this fall as
the migratory season for wild
ducks and geese becomes a reality.
That warning still stands.
Pennsylvania investigators have
reported there is a suspicion that
the rash of avian influenza cases in
Pennsylvania was begun last
spring by children tracking
waterfowl fecal droppings into a
poultry house after playing near
ponds frequented by migratory
wild ducks and geese on the
Atlantic flyway.
In addition to the waterfowl
connection, the Maryland
veterinarian lists the following as
possible infection carriers:
Equipment repair persons,
exterminators (pest control
operators), servicemen and
deliverymen, people involed in
hauling poultry to processing
plants, and others who go from one
poultry farm to another in the
normal course of business. Social
callers could also be included.
Coops, crates, trucks, and
filler flats.
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Regarding the last item. Dr.
Mallinson advises that filler flats
should not be allowed in layer or
breeder houses unless they are
either new fiber flats or cleaned
and disinfected plastic flats.
Until the extent of the problem in
Pennsylvania has been fully
defined, Dr. Mallinson advises
Maryland producers to not allow
persons in their poultry houses who
have been on farms in Lancaster
County unless they don
protective headwear, cleaned and
disinfected boots, and freshly
laundered cover-alls.
Fanners themselves should
keep such clean, sanitized clothing
on hand for visitors, the Maryland
Extension specialist said. He
commended the Lancaster County
(Continued from Page DIO)
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The dairy herd size is 650 cows
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active role in promoting highly
ungraded sanitation security
programs for all persons who visit
poultry houses in southeast Penn
sylvania.
Mallinson notes that avian in
fluenza can spread quite readily
among poultry flocks, and even to
livestock especially swine. It is
similar in contagiousness to
Newcastle disease, another virus
scourge of the poultry world. There
is no specific medication for the
disease. That’s why health
precautions have to be very rigid.
He commented that ways to
insure safe movement of pullets
and slaughter fowl to Maryland
from suspect areas are being
explored.
the total herd in 1982 was 19,924
pounds of milk and 678 pounds of
fat. The milking herd average was
23,449 pounds of milk and 798
pounds of fat.
This is another dairy which
raises its own replacements, both
registered and grade. All bull
calves are sold at one day of age
except those resulting from special
matings. Many of the outstanding
brood cows are in a program of
super-ovulation and embryo
transfer.
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