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Disease FAQ

Q.What worms of deer are important?

A. The most important and damaging worm to control in deer is lungworm, especially in young growing fawns which is the most susceptible group. Merial provides two excellent products which control lungworm as well as gut parasites in deer: EPRINEX™ Pour-On for Cattle & Deer and IVOMEC® Pour-On for Cattle & Deer.

Q.How important is it to control worms in deer?

A. Surveys establish that the most successful deer farmers from a stock health point of view, begin worm control early in the life of the deer about Feb-Mar (pre-weaning if necessary) and administer regular worm control through to late winter/early spring.

Q.How often should I treat my deer with IVOMEC® or EPRINEX™?

A. Treatments should begin Feb-Mar, if necessary before weaning, and be given at 6-8 weekly intervals until late winter-spring. If you have large numbers of deer and a high stocking rate apply treatments 6-weekly for IVOMEC or EPRINEX, if you have low stocking rate, treatment intervals can be extended up to 8-weekly(EPRINEX only).

Q.What is sub-clinical parasitism?

A. When deer are obviously affected by worms they are said to be clinically affected (ie they are scouring, coughing or ill-thrifty). Sub-clinical effects are not obviously seen but can be measured by weighing or monitoring for the presence of parasites by conducting lungworm larvae counts or worm egg counts on dung samples. Sub-clinical effects may cause production losses due to reduced weight gain in otherwise healthy looking animals.

Q.Why is it necessary to treat deer for worms?

A. Parasite (worm) control is necessary to allow deer to grow and develop as well as they are able. The objectives of parasite control are to:

  • Remove existing worm burden
  • Reduce reinfection challenge
  • Reduce the level of pasture worm larvae contamination