AMES, la. If changes in the
ozone layer surrounding the earth
should increase ultraviolet
radiation, more cases of cancer
eye in susceptible cattle and more
severe of the disease
could be expected.
Research here at the National
Animal Disease Center supporting
this conclusion also strengthens
the belief of scientists that ex
posure of such cattle to ultraviolet
beta radiation may induce the
disease, also known as bovine
ocular squamous carcinoma or
epithelioma.
A team of Science and Education
Administration scientists
produced anatomic changes and
lesions typical of early cancer eye
in susceptible cattle by exposing
the cattle to controlled doses of
ultraviolet-beta radiation from sun
lamps.
The researchers also suggest an
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AGRI EQUIPMENT INC.
2754 Creek-Hill Rd.
Leola. PA 17540
717-656-4151
I. G. SALES
Rt. 113, Box 200
Silverdale, PA
215-257-5135
G. HIRAM
BUCHMAN, INC.
Rte.sl9-N.offßte.46
P.O. Box 185
Beividere, NJ 07823
201-475-2185
GEORGE A. COLEMAN BENNETT MACHINE CO.
Rt. #2. Box 216 1601 .^?T"l B ' Vd -
Elmer, NJ JJS'SMI,
609-358-8528 302-422-4837
Scientists link cattle cancer eye to solar activity
association between solar activity
and numbers of cattle condemned
because of cancer eye at USDA
inspected slaughter plants bet
ween 1950 and 1976.
Cancer eye has been reported in
almost every breed of cattle, but
most frequently in Herefords.
Within the Hereford breed, cattle
lacking any pigment around and in
the eye a genetically controlled
trait —are most susceptible.
Herefords lacking pigment
around the eyes, from a line with a
history of cancer eye, were used
in the study by veterinary medical
officers Kenneth E. Kopecky,
George W. Pugh, Jr., David E.
Hughes, and Norman F. Cheville,
and statistician Gordon D. Booth.
For 22 months, first for 7 minutes
daily and then for periods
gradually increasing to 180
minutes daily, the cattle were
stanchioned facing ultraviolet-beta
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RDI, Cains. Gap, PA 17527 717-264-9588
717-442-8134
HARRY L. TROOP
Rt. 1 Cochranville, PA 19330
ERB& HENRY
EQUIP., INC.
22-26 Henry Avenue
New Berlmville, PA
215-367-2169
ft
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215-593-6731
radiation from FS-40 lamps.
During the total exposure of 1,500
hours, the lamps were filtered to
absorb wavelengths below 285
nanometers, so that the radiation
resembled natural ultraviolet-beta
radiation.
Three of the four animals ex
posed to ultraviolet radiation
developed lesions typical of early
stages of cancer eye. The fourth
animal had deep-set eyes under a
prominent crest, which apparently
protected its eyes. The scientists
ruled out pinkeye and cytopathic
herpesvirus infection as probable
causes of damage to the animals’
eyes.
A 1950-76 survey of con
demnations for cancer eye by
\
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J. A. SWOPE
Box 121, RDI
Myerstown, PA
717-933-4758
DETWILERSILO
REPAIR
Rt. 2, Newville, PA
717-776-7533
federal meat inspectors also shows
indirect evidence linking cattle
exposure to ultraviolet-beta
radiation with development of this
disease, according to Kopecky.
Taking into account die annual
increase in number of cattle
slaughtered, the researchers found
that the-percentage of annual
condemnations for cancer eye
doubled over the 16-year period.
Greater awareness of the disease
by inspectors of what is now
USDA’s Food Quality and Safety
Service may have been a factor in
this increase. But Kopecky
believes the incidence of the
disease also rose.
The researchers plotted annual
condemnations, adjusted for
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ROY H. OUCH, INC.
Ephrata, RD2.PA
717-859-2441
WERTZ GARAGE
Lineboro, MD
301-374-2672
AGRONOMICS INC.
Box 64, R.D. 2
Factoryville, PA
717-945-3933
PAUL DOTTERER FARM EQUIPMENT
R.D. 2, Mill Hall. PA
717-726-3471
NICHOLS FARM EQUIPMENT
R.D. 1 Bloomsburg, PA
717-784-7731
MARSHALL MACHINERY
R.D 4, Honesdale, PA
717-729-7117
I.H. BRUBAKER. INC.
Lancaster, PA
717-397-5179
CJ. WONSIDUER BROS.
RDI, Quakertown, PA
215-536-1935
215-536-7523
A 6. IND. EQUIPMENT CO., INC.,
1207 Telegraph Rd
Rising Sun. MD
301-658-5568
301-398-6132
215-869-3542
Uncaster Feinting, Saturday, My IS, 1951— 07
numbers slaughtered, on a graph.
Then they plotted solar activity
shifting solar activity forward 5
years on the graph to account for
apparent delay in development of
cancer eye after exposure. Annual
cancer eye condemnations and
annual solar activity both peaked
on the graph near the same times
. about 1960-62 and again about
1970-74.
The Environmental Protection
Agency partially funded this study.
*2
PETERMAN FARM EQUIPMENT, INC.
225 York Road
Carlisle, PA
717-249-5338
SHARTLESVILLE FARM SERVICE
Hamburg, PA
215-488-1025
H. Daniel Wenger, Prop.
NECKLETS LIMESTONE PRODUCTS INC.
R.D. 1 Herndon. PA
717-758-3915
CJ. WONSIDLER BROS.
RD2, Oley, PA
215-987-6257
BIR FARM EQUIPMENT, INC.
R.D. 1, 80x217A
Beavertowm, PA
717-658-7024
C. J. WONSIOLER BROS.
Rt. 309 1 100
R 2 New Tripoli, PA
215-767-7611
B. EQUIP, me.
8422 Wayne Hwy
Waynesboro, PA
717-762-3193
fiRUMEUI FARM SERVICE
Quarryville, PA
717-786-7318
6HM FARM EQUIPMENT, INC.
Annviite, RDI, PA
717-867-2211
AIRVILLE EQUIPMENT, INC.
P.0.80x 37,
Airville, PA
717-862-3358