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Updated: Aug 23, 2026

Detection of Infectious Virus from Field-collected Mosquitoes by Vero Cell Culture Assay
07:23

Detection of Infectious Virus from Field-collected Mosquitoes by Vero Cell Culture Assay

Published on: June 9, 2011

West Nile virus activity--United States, July 28-August 3, 2004

    MMWR. Morbidity and Mortality Weekly Report
    |August 6, 2004
    PubMed

    Insights

    In 2004, West Nile virus (WNV) affected 20 states, with 406 reported human illnesses. Arizona reported the majority of cases, with a median patient age of 51 years.

    Area of Science:

    • Public Health
    • Epidemiology
    • Arbovirology

    Background:

    • West Nile virus (WNV) is a mosquito-borne illness with potential public health implications.
    • Surveillance data is crucial for understanding WNV transmission patterns and geographical distribution.

    Purpose of the Study:

    • To report the incidence and geographical distribution of human West Nile virus cases in the United States during a specific surveillance period in 2004.
    • To characterize the demographic features of reported WNV cases.

    Main Methods:

    • Data collection through the ArboNET surveillance system.
    • Reporting of human WNV cases from participating states to the Centers for Disease Control and Prevention (CDC).

    Main Results:

    • A total of 406 human WNV cases were reported from 20 states in 2004.
    • Arizona reported 247 (61%) of the total cases.
    • The median age of affected individuals was 51 years, with 57% of cases occurring in males. Seven fatalities were reported.

    Conclusions:

    • West Nile virus surveillance is essential for monitoring disease activity across the US.
    • The findings highlight significant WNV burden in certain regions, particularly Arizona.
    • Demographic data provides insights into vulnerable populations.

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