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Bacterial meningitis in Washington state.

P R Ostroy

    The Western Journal of Medicine
    |October 1, 1979
    PubMed
    Summary

    Bacterial meningitis surveillance in Washington State identified Hemophilus influenzae as the most common cause. A notable incidence occurred in young American Indians and a cluster of ampicillin-resistant cases emerged near Fort Lewis Army Base.

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    Area of Science:

    • Epidemiology
    • Infectious Diseases
    • Public Health Surveillance

    Background:

    • Bacterial meningitis poses a significant public health threat, particularly in vulnerable populations.
    • Surveillance systems are crucial for monitoring infectious disease trends and identifying outbreaks.
    • Hemophilus influenzae has historically been a leading cause of bacterial meningitis.

    Purpose of the Study:

    • To describe the epidemiology of bacterial meningitis in Washington State during 1977.
    • To identify the primary etiologic agents and high-risk populations.
    • To detect and characterize any emerging resistance patterns.

    Main Methods:

    • Utilized a statewide surveillance system for reporting bacterial meningitis cases.
    • Analyzed data to determine the most frequent causative agents.
    • Investigated incidence rates among different demographic groups, including American Indians.
    • Examined geographic clusters and potential risk factors, such as military base proximity.

    Main Results:

    • Hemophilus influenzae was identified as the most common etiologic agent of bacterial meningitis.
    • A high incidence rate of H. influenzae meningitis was observed in American Indian children under five years of age.
    • A focus of ampicillin-resistant H. influenzae meningitis cases was identified in Pierce County, linked to Fort Lewis Army Base personnel and their dependents.
    • No direct case-to-case transmission links were established, but a potential association was noted.

    Conclusions:

    • Hemophilus influenzae meningitis represented a significant burden in Washington State in 1977, with specific demographic and geographic vulnerabilities.
    • The emergence of ampicillin resistance in H. influenzae highlights the need for ongoing monitoring and potential adjustments in treatment guidelines.
    • Continued surveillance is essential to detect associations and control the spread of bacterial meningitis.

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