Scientists Are
Gaining On
Poultry Leucosis
Poultry scientists are Toe- on iy drastically r“dnee losses chickens infected with varying
coming confident that a way estimated at $6O million" types of leukosis in 22 widely
eoon will* be found to control annilsilly but the answers dispersed flocks was used to
leukosis, the cancer-like dis- provided by poultry scientists inoculate birds of a leukosis
ease of poultry. might also prove beneficial to susceptible line at East Lans-
' A comment by poultry patho- those studying cancer in man. mg. The different sources of
legist B. R. Burmester, who -The diseases are similar to the virus caused a wide variation
has studied leukosis 20 years extent that both can be tumor- in the amount of disease pro
at the ARS Regional Poultry producing and both are chara- duced but the types of disease
Research Laboratory, Bast cterized by uncontrolled and were similar. Types were also
Lansing, Mich., is indicative rapid cell division and grow- similar to those caused by
of the optimism being express- th. strains of virus previously iso
ed: "In all the years of work- Burmester lists several re- lated and studied extensively
ing on leukosis at this labora- search developments by ARS at East Lansing,
tory, I have never been as op- and State scientists studying Researchers have found how
timistie a« I am now concern- leukosis that make the out- to detect affected or virus-
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Many researchers consider Results of a recent study
leukosis the costliest of all suggests that a single virus
poultry ailments and one of though it may vary in
the most complex to solve, potency causes the disease
Control of leukosis would not in its many forms. Virus from
Stop diseases
before they start...
11
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736 East Chestnut Street Lancaster, Penna.
Phone 397-3721
Lancaster Co. Distributors for Manzate
MILLER CHEMICAL;ond FERTILIZER CORP.
MAN Z ATE*... regularly
MANES FUNGICIDE
Lancaster Farming, Saturday, June 15, 1983 —1 S
carrying birds by laboratory
methods. Two means of detec
tion are used; both are based
on tissue culture procedures.
A serum antibody test identi
fies some birds that are or
have been, infected and have
produced antibodies against
the disease. A virus detection
test identifies chickens that
were infected as embryos
or shortly after hatching
and still carry the virus, but
don’t respond to the serum
antibody test ARS scientists
are making progress towa-d
the development of a simple,
reliable test for field use.
Much has been learned
about how the virus is trans-
Phone 733-6525
mitted. It has been proved that
the virus that causes visceral
lymphomatosis, the most pre
valent form of leukosis, can
be transmitted from genera
tion to generation by infected
fertile eggs. The disease can
also be transmitted by direct
contact between chickens in
the same pen.
This increased emphasis on.
leukosis research might re
sult m an answer to a question
that is perhaps a key to con
trolling leukosis* What is re
sponsible for triggering a la
tent infection? The virus will
often be present in chickens
for a long time, apparently not
causing any trouble. Then
something happens, setting off
rapid cell growth in one or
more organs or systems of the
body.
Since much basic progress
has been made towards an
adequate understanding of the
complex disease, AES poultry
researchers believe that in
creased emphasis now on
practical control methods will
hasten the day when poultry
men can, ely combat
leukosis.
County Native
Appointed By
Ag Extension
Richard P Lorah, who )vas
graduated at The Pennsylvania
State University on June 9
with a bachelor of science de
gree in agricultural education,
has been named to the Cooper-
RICHARD P. LORAH
ative Extension Service staff of
the University as assistant
county agent, effective June
10.
Dr. Russell B Larson, ex
tension director, announced
that Lorah will be assigned
to Clearfield county where he
will be associated with County
Agent Homer Mazer, with offi
ces in the post office building,
Clearfield,
Son of Mrs. Floyd G Lorah,
153 E. Main St., Adamstown,
Lancaster county, Lorah was
reared on a farm, and was gra
duated from Cocalico Union
high school. While in college
he was a member of the Poul
try Club, the Collegiate Fu
ture Farmers of America, the
Coaly Society, Agricultural
Student Council, and Alpha
Tau Alpha, Gamma Sigma Del
ta, and Alpha Zeta fraterni
ties.
Pennsylvania’s ■commercial
pea crop is used entirely for
processing Fifty-five percent
is frozen and 45 percent is
canned. Peas account for 7
percent of the total vegetable
acreage and rank fifth in value
to growers. The first five coun
ties in order of pea acreage
are Y«rk, Centre. Columbia,