A Sussex County man in his 60s tested positive for the Jamestown Canyon virus, the first human case of the mosquito-borne illness in New Jersey in six years, Health Commissioner Judith Persichilli announced Wednesday.

The man developed a fever and neurological symptoms in May, the announcement said.

“Spending time outdoors, whether walking, gardening, or playing with our dogs, is a good way to maintain physical and mental health, but it is important to take steps to prevent mosquito and tick bites, which are responsible for several diseases in New Jersey” Persichilli’s announcement said.