CONCORD – The State Department of Health and Human Services, Division of Public Health Services announced last week that an adult from Dunbarton has tested positive for Jamestown Canyon virus.
The patient was hospitalized with fever and headache and then discharged to recover at home.
This is the third Jamestown Canyon virus detection in the state this year. Jamestown Canyon virus is transmitted by the bite of an infected mosquito. There are no vaccines to prevent this, and treatment consists of supportive care.
As a result of the case, the state raised the arboviral risk level for Dunbarton to a high level.
The arboviral risk level indicates the risk of transmitting infections to people by mosquitoes. In addition to the Jamestown Canyon virus, New Hampshire has also had cases of East Equine Encephalitis Virus and West Nile Virus in past years.
Lives at risk for the surrounding city of Weare have been increased to moderate. The level of risk for the surrounding towns of Hooksett, Hopkinton and Goffstown remains moderate.
The risk level for the surrounding city of Bow, where a Jamestown Canyon virus infection was reported on August 7, remains high. A virus infection was also reported in Loudon in early July.
“This is the third detection of Jamestown Canyon virus infection in our state this year, and the risk for Jamestown Canyon virus and other mosquito-borne viral infections will only increase until there is a harsh mosquito-killing frost in. fall, ”said NH State Epidemiologist Dr. Benjamin Chan. “All three mosquito-borne infections that can be acquired in New Hampshire can cause severe neurological disease, and it remains important for residents and visitors to protect themselves and their families by preventing mosquito bites.”
Jamestown Canyon virus is a mosquito-borne pathogen that circulates widely in North America primarily among deer and mosquitoes, but it can also infect humans.
Human reports have increased in recent years as the recognition and testing for this virus increases. This is the 12th New Hampshire case of Jamestown Canyon virus since the first report of the disease in the state in 2013. Many illnesses caused by the virus are mild, but moderate to severe central nervous system involvement requiring hospitalization has been reported. , including fatal infections.
In addition to the Jamestown Canyon virus, the risk of infection in New Hampshire by East Equine Encephalitis Virus and West Nile Virus will continue to increase during the summer and fall until mosquitoes stop biting. No cases of West Nile virus or Eastern equine encephalitis have been reported in New Hampshire this year.
Health officials advise New Hampshire residents and visitors to continue to protect themselves and their family members.
People can be infected and develop no symptoms or develop only very mild symptoms for all of the mosquito-borne diseases found in New Hampshire.
Early symptoms can include fever, body aches, headaches, and fatigue. With these diseases, more serious diseases of the central nervous system can occur, including meningitis or encephalitis. If you or someone you know experiences symptoms, including fever and headache, contact your local doctor.
Anyone with questions about vector-borne diseases can call the State Office for Infectious Disease Control at (603) 271-4496 from 8:00 am to 4:30 pm, Monday through Friday. More information can also be found online at dhhs.nh.gov and cdc.gov.