The New Jersey Department of Agriculture announced on Friday that the East Asian tick found on the farms of Hunterdon County last year, also known as Longhorned tick or the bush tick, survived during the winter.
“In the winter and April 15, 2018 surveillance continued, the National Veterinary Services Laboratories confirmed that Longhorned tick has been successfully wintering in New Jersey and is likely to be established in the state,” a press release said.
Last summer, a farmer walked into the Hunterdon County health office covered in thousands of the ticks after she was shearing a 12-year-old Icelandic sheep named Hannah.
Experts were called in to identify the tick which was not previously known to exist in the United States. The Department of Agriculture says it still does not know how the tick made its way to New Jersey.
The sheep has never traveled internationally and has rarely left Hunterdon County, according to Andrea Egizi, a tick specialist at the Monmouth County Tick-borne Disease Lab.
When the incident was first reported, steps were taken to eradicate the insect from the farm by using a chemical wash on the sheep and removing tall grass where the they are known to dwell.
The exact location of the farm and the identity of the sheep farmer is being withheld by the New Jersey Department of Agriculture.
Although the ticks are known to carry diseases, such as spotted fever rickettsioses in other parts of the world, tests performed on the ticks and the farm animals were negative for diseases.
Local, state and federal animal health and wildlife officials, as well as Rutgers University – Center for Vector Biology, are working together to eliminate the ticks and stop them from spreading. Wildlife and livestock in the area will continue to be monitored throughout the year.
The ticks are known to swarm and infest deer and animals other than sheep, so the department is warning that it has the potential to infect other North American wildlife species.
The ticks reproduce asexually by cloning themselves and just one of them is capable of laying thousands of eggs.
State and federal Department of Agriculture employees will be working with the public to determine if the tick has spread and to educate the public about protecting their livestock and pets from the pest.
The nymphs of the ticks are very small, resemble small spiders and are easy to miss, according to the Department of Agriculture. They are dark brown, about the size of a pea when full grown and can be found in tall grasses.
Authorities are asking people to contact the state veterinarian at 609-671-6400 if they see any unusual ticks on their livestock.
Unusual ticks detected in wildlife should be reported to the New Jersey 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.