Horses

Health Alert: New Tick Found in N.J.; EHV Quarantine Lifted

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This species of East Asian tick, also known as the longhorned tick or bush tick, was found on a farm in Hunterdon County on Nov. 9. Credits: Provided by the New Jersey Department of Agriculture
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TRENTON, N.J. — An exotic East Asian tick, also known as the longhorned tick or bush tick, was found on a farm in Hunterdon County on Nov. 9.

On Nov. 21, New Jersey Secretary of Agriculture Douglas H. Fisher announced the United States Department of Agriculture’s National Veterinary Services Laboratory (NVSL) in Ames, Iowa confirmed the tick’s species. Initial identification was made by the Monmouth County Tick-borne Diseases Lab, located at Rutgers University and the Hunterdon County Division of Health. This tick was not known to be present in the U.S., although there are records of at least a dozen previous collections of this species in the country on animals and materials presented for entry at U.S. ports.

The species is dark brown in color and grows to the size of a pea when fully engorged. Both larval and nymphal stages are very small and difficult to observe with the naked eye. Adult ticks are seen mainly during early summer, larvae from late summer to early winter, and nymphs mainly in the spring.

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This tick is a serious pest to livestock (including cattle, horses, farmed deer, sheep, and goats), particularly in New Zealand, as well as wildlife, pets, and humans. Farmers should monitor their livestock for the presence of this tick and decreased growth rates or signs of anemia in the animals. With respect to livestock, the tick is known to transmit a disease called Theileriosis to cattle, which results in severe anemia and possibly death. There are no human health or food safety risks associated with Theileria. This tick also has the potential to spread other bacterial and viral diseases to humans and other animals.

The animals and the property where the tick was found have been treated to eliminate the tick. To determine if the tick has spread to nearby wildlife, ongoing surveillance is being conducted by the NJ Division of Fish and Wildlife, Department of Environmental Protection (DEP) in cooperation with Wildlife Services from the United States Department of Agriculture, Animal and Plant Health Inspection Service (APHIS) and the Southeastern Cooperative Wildlife Disease Study at the University of Georgia.

The potential impact of this tick on tickborne illness in New Jersey residents is not yet known. In other parts of the world, the bush tick has been associated with several tickborne diseases, some of which are found in New Jersey, such as spotted fever rickettsioses. The Department of Agriculture is investigating if the ticks found locally are carrying any potential pathogens that may impact human or animal health.

Some tick species may become less active in the winter; however, it is important to take steps to prevent tick bites whenever you are in areas where ticks may be found. Protect yourself, your family and your pets from tick bites by:

  • Knowing where ticks are: ticks can live in or near wooded or grassy areas or on animals directly.
  • Using repellent on skin: use EPA-registered insect repellents containing DEET, picaridin, IR3535, oil of lemon eucalyptus, para-menthane-diol, or 2-undecanone. Always follow product instructions.
  • Treating clothing, boots and camping gear with permethrin.
  • Covering up by wearing long sleeves and pants when spending time outdoors and consider tucking pants into socks to prevent ticks from getting under clothes.
  • Showering as soon as possible after coming indoors to remove unattached ticks.
  • Inspecting your body for ticks and removing ticks immediately.
  • Treating your pets with veterinarian-approved products to kill or repel ticks. Products are available for domestic animals like dogs and cats, as well as for animals like sheep, goats and cattle.

State and federal animal health and wildlife officials are working to address these findings. Response efforts will include surveillance of the property and wildlife within the region. If necessary, tick treatments will be conducted to reduce the risks of spread. The primary goal is to eradicate the tick before it spreads to new areas.

Questions about livestock can be directed to your local veterinarian or the State Veterinarian at 609-671-6400 during regular business hours.

This tick is a known pest in deer and has a wide host range, thus can infect a range of wildlife species. If the tick is detected in wildlife, then it should be immediately reported to the NJ Division of Fish and Wildlife, Bureau of Wildlife Management at 609-984-6295 or the Office of Fish and Wildlife Health and Forensics at 908-637-4173 ext. 120.

For questions about tickborne illness in humans, contact your local health department (http://localhealth.nj.gov) or the New Jersey Department of Health during normal business hours at 609-826-5964

Quarantine Lifted On Warren County, N.J. Farm

A quarantine imposed on a Warren County Farm after a mare was dignosed with Equine Herpes Myeloencephalopathy (EHM) has been lifted.

On Nov. 2, the 25 year-old Quarter Horse was euthanized after she was unable to stand. The quarantine was imposed when the tests came back positive for EHV-1 on Nov. 8.

No additional horses have become sick and the quarantine was lifted on Nov. 24.

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