'enter, Orchard Road, University Park, PA 16802
Service
Dairyman to Dairyman will be a
regularly appearing column by
George Cudoc, consulting dairy
man for PA DHIA. Contact him by
calling the PA DHIA Service Cen
ter at (800) 344-8378, or him
directly at (724) 625-8971; fax
(724) 625-8972; e-mail:
GCudoc@yi.net
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QUESTION: Wc have noticed
that the percent of new infections
in our herd SCC has doubled the
last three months. Where should
we look to find the cause of this?
ANSWER: SCC increases dur
ing the summer months are cer
tainly not new to Pennsylvania
dairymen.
High humidity, probably more
than high temperatures, is the
hardest thing on udder health.
Couple the two and we have cows
that have only one thing in mind, to
keep cool. It’s a wonder that cVety
cow doesn’t develop problems.
To look further into this herd’s
specific problem, we observe that
from August 1,1997, through May
automatic farm systems
608 E.. Evergreen Road, Lebanon, PA 17042
Phone: 717-274-5333
1,1998, the herd averaged 9.5 new
infections per test period, or about
7 percent of the herd.
This information can be found
on the SCC management report as
well as Herd Summary 11.
August 1998 shows these num
bers increaseing to 17 new infec
tions or 12 percent of the herd.
Finding solutions to these kinds
of problems requires us to pinpoint
target areas.
Try not to panic and make
wholescale changes, but rather
take small steps to ease the
problem.
Look at the bottom right comer
of Herd Summary II to sec a SCC
profile of cows by days in milk.
When examining this section of
the herd in question, one very
important detail is observed that
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Days In '(* ' Lactation ! j ' Ucuikh 2 Lactation 3+
Milk No Test Linear I' Wl.i New Bod; No Tt.l bne.r Wtd Ne. Bod, No T»l I Une.r W.d N e . Body
Category Co«« Mllk scc Scc I " f, ° Cond Co ** Mllk SCC scc lnr ' t ' c ° n(l c< ”" Mllk SCC W ' ct Cond
0-« Days ~590 38 179 31 764 14 33 V *1 7 5 3 514 5*
~*Tw 6 65 1 30 103 I 3 3 4 97 6 3 3 121 2 9 10 97 5 3 0 100 3 2
100-199 Days 15 686 48 370 Ti 12 900 57 651 2 30 15 • 7 56 612 30
200-299 Days 19 686 3 6 629 3 3 2 12 75 7 4 4 274 1 3 5 23 71 5 4 7 342 3 3 0
300+ Days 3 591 29 95 32 i 72 0 3 1 112 3 5 5 67 1 4 4 266 3 6
Av|/Tolal 49 66 4 5 0 406 7 T 5 36 12 7 4 7 336 3 3 3 61 13 3 49 311 7 3 2
U-TROUGHS
3/16’
3/16’
3/16"
3000
2000
may map a direction in solving this
problem in August 1998 there
arc a total of 21 cows in the 0-40
days in milk catagory. Of these 21
most recently fresh cows, seven
are observed with new infections.
Where are they becoming
infected?
Infected cows on the first test
day most likely become infected in
one of three periods:
1. First two weeks following
drying off.
2. During the springer period.
3. First two weeks after calving.
This herd also indicates that six
of the 21 fresh animals are heifers.
Fifty percent of these heifers were
infected. With heifers not going
through a dry period and a high
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Eli L. Stoltzfus (Organic Center)
3338 Horseshoe Pike (610-273-2889)
Honey Brook, PA 19344
Lancaster Farming, Saturday, August 29, 1998-.
rate of infection, we can’t elimi
nate the diy cow period as a prob
lem, but I’m inclined to concen
trate on the springer and post
calving periods.
Doing CMTs on fresh cows
indicated infection already at calv
ing, so now we can look at the 3- to
4-weck pre-fresh period.
Questions were raised about
animal concentration and comfort,
as well as bedding choice and
cleanliness, in this herd.
Unfortunately, for this herd, or
others like it, infections during this
period are the most profit-robbing.
The estimated 1.5-pound milk
loss per day by a 1-liner SCC code
increase can be as much as 2- to
3-times this loss in early lactation.
(Turn to Page A3l)
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