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Related Experiment Videos

Mycobacterium avium complex, an emerging pathogen in Massachusetts.

G C du Moulin, I H Sherman, D C Hoaglin

    Journal of Clinical Microbiology
    |July 1, 1985
    PubMed
    Summary

    The incidence of Mycobacterium avium complex (MAC) isolation increased fivefold from 1972-1983. Communities with distant water sources showed higher MAC isolation rates, suggesting environmental links.

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    Area of Science:

    • Microbiology
    • Infectious Diseases
    • Environmental Health

    Background:

    • The Mycobacterium avium complex (MAC) is an opportunistic pathogen.
    • Understanding trends in MAC isolation is crucial for public health.
    • Previous studies have not fully elucidated the epidemiological factors associated with MAC.

    Purpose of the Study:

    • To analyze the trends in MAC isolation over an 11-year period.
    • To investigate potential environmental risk factors associated with MAC infections.
    • To assess the changing incidence of nontuberculous mycobacteria.

    Main Methods:

    • Retrospective analysis of laboratory records from 1,953 patients between 1972 and 1983.
    • Examination of MAC organism isolation from clinical specimens.

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  • Correlation of isolation data with demographic and geographic factors, including water sources.

    • Main Results:

    • A fivefold increase in MAC isolation incidence was observed from 1972 to 1983.
    • A doubling of patients with MAC from sterile sites occurred since 1980.
    • A fourfold increase in other nontuberculous mycobacteria was noted.
    • Higher MAC isolation rates were associated with high-density population centers and distant drinking water sources.

    Conclusions:

    • MAC isolation has significantly increased, indicating a growing public health concern.
    • Environmental factors, particularly drinking water sources, may play a role in MAC transmission.
    • Further research into the environmental ecology of MAC is warranted.