Researchers discuss the surveillance of West Nile virus and other arboviruses in the United States.
By Tarun Sai LomteAug 29 2023Reviewed by Benedette Cuffari, M.Sc. A recent study published in the United States Centers for Disease Control and Prevention Morbidity and Mortality Weekly Report discusses the surveillance of West Nile virus and other arboviruses in the United States.
About the study In the U.S., arboviral disease cases are reported by states to the CDC through the ArboNET surveillance system. In 2021, 3,035 cases of arboviral disease occurred, including 2,113 neuroinvasive cases. These cases were primarily caused by the easter equine encephalitis virus, Jamestown Canyon virus, La Crosse virus, Powassan virus, St. Louis encephalitis virus, WNV, and viruses of unspecified serogroups.
Arizona reported most WNV neuroinvasive cases, with three counties accounting for over 50% of national cases. WNV disease incidence increased with age and was 60% higher in males. About 66% of Jamestown Canyon cases were neuroinvasive, with New Hampshire and Rhode Island reporting the highest incidence of neuroinvasive disease. About 75% of these patients were hospitalized, and two deaths were reported.
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