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Arthropodborne viruses (arboviruses) primarily infect humans through the bite of an infected mosquito or tick.Infections are commonly asymptomatic; however, the clinical signs and symptoms can range from a mild febrile illness to severe neuroinvasive disease.This report summarizes data for six nationally notifiable arboviral diseases for 2022 reported to ArboNET, the national surveillance system for arboviral diseases, including eastern equine encephalitis, Jamestown Canyon, La Crosse, Powassan, St. Louis encephalitis, and West Nile viruses.In 2022, these viruses caused 1,247 human disease cases, 968 (78%) hospitalizations, and 103 (8%) deaths.Reported case counts decreased from 2021 for all viruses except Powassan and St. Louis encephalitis viruses.Despite a substantial decrease in reported cases from 2021, West Nile virus remained the leading cause of arboviral disease in the continental United States.Variations in annual arboviral disease incidence and distribution highlight the importance of high-quality surveillance.Health care providers should suspect arboviral infection in patients with a clinically compatible illness, consider testing, and report positive findings to their state or local health department.In areas with arboviral activity, community and household efforts to reduce vector populations (e.g., applying insecticides and reducing breeding sites) and personal protective measures to decrease mosquito and tick exposures (e.g., wearing repellents and protective clothing) can reduce arboviral disease morbidity and mortality.
Sutter et al. (Thu,) studied this question.