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MMFS Manual

Chapter 11.3 Adopt on-farm biosecurity measures

Background information

Strict biosecurity measures are required to maintain freedom from economically significant diseases and parasites. Assessing the risk of disease outbreaks and adopting appropriate strategies can reduce the chances of introducing diseases that affect productivity and profit. If a disease is introduced, action must be taken to control or eradicate it.

At a glance

  • Avoiding disease introduction is the gold standard – your sheep will be healthier and more productive, and it’s more cost effective than treatment.
  • Keep footrot, lice and OJD out of your sheep flock.
  • When disease is detected, take action to minimise its impact.
  • Seek professional help in developing a biosecurity plan.

Assess the current disease status of your flock

Some important pests and diseases to be avoided include:

  • Footrot;
  • Lice;
  • Ovine Johnes disease (OJD);
  • Drench resistance (discussed in Chapter 11.2); and
  • Brucellosis.

Be able to recognise important diseases (Tool 11.13) and avoid their introduction.

Potential sources of disease

Ask for a signed National Sheep Health Declaration (which includes disease history) to assess the risk of disease when introducing new sheep into a flock. Visit http://www.farmbiosecurity.com.au/toolkit/declarations-and-statements to download a copy of a National Sheep Health Declaration template.

Sheep producers must provide a signed National Vendor Declaration (NVD) for all sheep or lambs they offer for sale or slaughter and insist on a correctly completed copy when buying sheep or lambs. A signed NVD declares that the owner of the sheep has met the basic on-farm food safety requirements of the Livestock Production Assurance (LPA) program (see Chapter 3.2 in MMFS Module 3 Market Focused Lamb and Sheepmeat Production).

Complete a risk assessment of your boundary fences and policy for new stock introductions, transport and people (see Tool 11.4) to identify potential disease risks for your farm.

Quarantine new sheep on arrival

Purchasing stock is a normal part of management on some farms. To minimise the risk of introducing disease, observe quarantine and induction periods during which existing sheep are not exposed to new sheep (see Tool 11.5). As a general rule, quarantine periods should be 21 days.

Control and eradicate existing diseases

Control and eradicate introduced diseases such as footrot and lice (see Tool 11.13).

If a disease you’re not confident in controlling or eradicating has made its way onto your place, seek immediate professional advice from your veterinarian or animal health advisor.

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