Volume 22 • Issue 03 • 2018
Breeding efficiency will decline in herds with a
high prevalence of type II ketosis: this is thought
to be due to the toxic effect of NEFA’s on the
follicle and the oocyte.
In a herd with a high prevalence of type II ketosis
a high proportion of the dry cows are excessively
fat (in excess of a body condition score of 3,5) and
many of the cows four weeks after calving are
thin (BCS of less than 2).
Herd surveillance to
determine the prevalence
and risk of ketosis
determine the risk of Type II ketosis developing,
is to take serum samples of multiparous cows
for NEFA evaluation between 2 and 14 days
prepartum of 5-15 cows. NEFA levels above
0.3mEq/l are indicative of an increased risk of
Type II ketosis.
Although high NEFA levels in heifers is also
associated with the risk of Type II ketosis, it has
also shown correlation with high milk production,
which may be due to the genetic ability of high
producers to utilise NEFA as energy source. Care
should be taken with the interpretation of these
results.
Draxxin Advertisement Final - Clair Scott 210mm x 148mm + 3 mm bleed.pdf
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2018/06/04
8:20:07 AM
VETERINARY MEDICINE
IF IT’S NOT BROKE,
DON’T FIX IT.
THAT’S WHY WE GO BACK TO DRAXXIN® YEAR AFTER
YEAR. WE SEE EXCELLENT RESULTS KEEPING HIGH
RISK CATTLE HEALTHY AND MORTALITY RATES DOWN.
MORE PAYING POUNDS AT THE END. THAT’S
WHAT WE ARE LOOKING FOR.
“
Type I ketosis surveillance
Post-partum
beta-
hydroxybutyrate (BHB) is
currently the test of choice for
herd surveillance of ketosis.
Please note that this will not
distinguish type I from type
II ketosis. Ideally 15 cows
should be sampled in the first
few days post-partum, and
BHB levels over 1.0mmol/l
indicate subclinical ketosis
while levels over 1.2mmol/l
indicate clinical ketosis. A
hand-held device is available
on the market (designed for
human diabetic patients) that
has been validated as a cow-
side test on blood (similar to
the hand-held glucometers).
It is important to use a central
blood sample as the level of
ketones can vary significantly
at the peripheral level.
References available online
Clair Scott
Scott Brothers Livestock,
Boissevain, Manitoba
Y
CM
MY
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CMY
Urine ketone tests (detecting
acetoacetate)
have
a
sensitivity and a specificity
of 78 and 96% respectively,
translating to false positive
and false negative rates of 4%
and 8% respectively when
the true herd prevalence is
30%.
K
Tests designed to detect
acetoacetate in milk have
relatively poor sensitivity,
and are not commonly used
any more.
Type II ketosis surveillance
Currently the best way to
do herd surveillance to
The cattle market has been through many challenges in
the last 10 years. But with Draxxin® there is at least
one element you can control — year in, year out.
YEARS
Talk to your local Zoetis sales representative for more information, and how you can count on Draxxin® through thick and thin.
S4 Draxxin ® . Reg. No.: C05/17.1.4/02. Each ml of solution contains 100 mg Tulathromycin. For full prescribing information refer to the package
insert approved by the medicines regulatory authority. Full product information available from Zoetis South Africa (Pty) Ltd.,
Co. Reg. No.: 2012/001825/07, 6 th Floor, North Wing, 90 Rivonia Road, Sandton, 2196. Postnet Suite 53, Private Bag 9976,
Sandton, 2146, South Africa. Tel.: +27 11 245 3300 or 0860 ZOETIS (0860 963847). www.zoetis.co.za
IE/123/1805/Draxxin/2018/JA
FOR ANIMAL. FOR HEALTH. FOR YOU.
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