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Vaccinate now against OJD

27 Jul, 2010 02:00 AM
THE Sheepmeat Council of Australia and WoolProducers Australia are urging sheep producers to vaccinate against ovine Johne’s disease (OJD) to avoid expensive stock losses.

With OJD on the rise in some states, WoolProducers Australia president Don Hamblin said sheep producers should be using Gudair vaccine to ensure maximum protection against the wasting disease of OJD.

“Now is the time of year when all lambs intended to be kept for breeding or wool production should be vaccinated against OJD,” Mr Hamblin said.

Vaccination is a key tool to minimise the risk of sheep contracting OJD. In those flocks already infected with OJD, vaccination is one of the most effective ways to reduce mortalities.

Industry and government have developed the Assurance Based Credit (ABC) scheme, an important tool for producers to help prevent the spread of OJD when trading sheep. The higher the ABC score, the lower the OJD risk status of the concerned sheep.

“Don’t wait until OJD is affecting production before doing something about it; look at your options for managing OJD and go with the course of action that is going to best increase your ABC score,” Mr Hamblin said.

ABC trading points can be gained by producers following the recognised OJD management practices outlined in the National Sheep Health Statement.

These include abattoir surveillance testing, participation in the Sheep Market Assurance Program and in particular, vaccination.

Sheepmeat Council of Australia president Kate Joseph, said a great way to gain additional ABC trading points was to vaccinate lambs before they reached 16 weeks of age.

“Lambs vaccinated before 16 weeks of age are protected from bacteria on contaminated pasture and therefore attract extra credit under the ABC scheme,” Ms Joseph said.

“Remember, having a higher ABC score provides an additional level of assurance to prospective purchasers, so it’s worth the investment both in terms of production and the later stages of marketing."

Figures from 2009 abattoir monitoring demonstrate that a third of farms in southern NSW are affected by OJD.

OJD is also increasing in other south-eastern states and in Western Australia. However, concerted efforts in vaccinating sheep by owners has shown that OJD is a disease that can be managed.

* Visit www.ojd.com.au

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Is Gudair safe for non-Merino breeds?
Posted by The Differentiator, 27/07/2010 10:05:01 AM, on The Land
The majority of producers are indifferent to Sheep Health Statements – if there is money to be made the sheep are bought. ABC points are a nice idea; but the veracity of claimed points can’t be proven. Vaccinate before 16 weeks, reduce the age profile of the flock and buy from known sources to reduce risk, but this doesn't 100% prevent it. The vaccine delays shedding and hence spread, it does not prevent infection. The sleeper remains the link to human health; Professor Tom Borody of the Centre for Digestive Diseases in Sydney continues to treat Crohn’s disease by treating Mycobacterium avium paratuberculosis the causal organism for Johne’s disease. And yes, Gudair is safe for all species of sheep.
Posted by Cronus, 28/07/2010 9:06:56 AM, on The Land
@Cronus - thanks for sharing your opinions and providing your comment regarding the suitability of Gudair in all species of sheep. My concern was initiated by a report I found on the web - link posted below for your interest: http://www.flockandherd.net.au/sheep/reader/gudair_reactions.htm
Posted by The Differentiator, 29/07/2010 9:28:50 AM, on The Land
Crohn's disease is auto immune, no specific cause such as dementure. The whole points system is based on hypothesis; OJD free flocks have no status other than what area they are in. Perhaps we should restart vaccinating against smallpox just in case it reinvents itself. There are far more serious problems for the sheep industry such as lice and worm resistance to various chemicals. The Sheep CRC could be modified but is probably best eliminated all together.
Posted by John Niven, 2/08/2010 8:46:34 AM, on The Land

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