
07/15/08, 04:16 PM
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Join Date: Mar 2003
Location: Ohio Valley (Southern Ohio)
Posts: 3,868
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Quote:
Originally Posted by Ronney
I doubt that BVD had much to do with it - calves born to mothers with this disease are normally healthy and the BVD doesn't show up until they are adults.
Cheers,
Ronnie
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Ronnie, Although technically you are correct in that BVD often doesn't show up until later in life, calves can get the disease and can be carriers and infect your whole herd without showing outward symptoms themselves. And a calf born to a mother with BVD is usually born with a whole host of issues, from weak calf syndrome to cataracts on the eyes, heart defects, etc.
From the University of Utah Extension office;
A serious health problem of newborn calves was recognized 20 years ago and termed
“weak calf syndrome”(WCS). The Bovine Virus Diarrhea (BVD) virus was often isolated from
affected calves and from these herds. In recent years, veterinarians have again been looking at the
effects of the BVD virus on the fetus. The two conditions seem to be the same, with the only
difference being the terminology used. Several herds in Utah showed signs in the spring of 1993
similar to these diseases and four of these herd problems were investigated. The conclusion was
that each of these herds suffered an outbreak of WCS or the effects of a BVD fetal infection.
The signs and history for both conditions are very similar. There are 15–20 different
clinical signs and problems listed for WCS and BVD. Not all occur in every calf, but on a herd
basis, MANY of those conditions do occur in a given herd and they occurred in the Utah herds
evaluated. Some of the common signs for both conditions include:
! Calves weak at birth
! Unable or reluctant to rise
! Immature (small calves)
! Occasional abortion or mummified fetus
! Dummy calves
! Dome shaped head
! Abnormal haircoat—“karakul” coat; sparse hair; frost on back in spring and heat
intolerance in summer
! “Coyote” face and muzzle
! Red, crusted muzzle
! Cataracts
! Blood clots on white of eye
! Occasional skeletal defects
! Arched back; gait problems
! Poor doing
! Die later from scours, pneumonia, abscesses (immune deficient)
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