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1. Name two common signs associated with a severe infection of either barber’s pole worm or liver fluke.
2. What are the causes of scouring that would need to be managed to reduce flystrike risk?
3. If sheep are being brought onto the property, what are your options to manage lice?
Severe acute or ongoing (chronic) blood loss from either barber’s pole worm or liver fluke leads to obvious signs of anaemia. These are pale gums and conjunctiva (inside the eyelids); lack of stamina causing lagging or collapse when mustered; and ultimately death from lack of red blood cells needed to carry oxygen around the body.
Swelling under the jaw (bottle jaw) results from both severe barber’s pole worm and liver fluke infections. The loss of blood results in anaemia and less protein in the blood. This imbalance in the normal body fluids results in fluid accumulating under the jaw in some, but not all, affected animals. It does not always occur during an outbreak of barber’s pole worm disease, and can also be caused by other factors (e.g. a severe lack of protein in under-nourished sheep).
In summer rainfall areas the major causes of scouring and dags are
In winter rainfall environments the major causes of scouring and dags are
A good biosecurity plan must assume that introduced sheep are infested with lice regardless of their history or whether there are no lice or signs of lice. Your decision on how to manage the introduced sheep will be a risk management choice. This is based on
Management options in descending order of biosecurity rigour are: