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Subclinical Brucella infection in man.

R J Henderson, D M Hill

    British Medical Journal
    |July 15, 1972
    PubMed
    Summary

    Subclinical Brucella abortus infections are common in dairy workers and vets, often without symptoms. High antibody titers alone shouldn't diagnose illness in these occupational groups.

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    Area of Science:

    • Veterinary Medicine
    • Infectious Diseases
    • Occupational Health

    Background:

    • Brucella abortus infections frequently cause subclinical disease in individuals within the dairy farming community, slaughterhouse work, and veterinary professions.
    • High antibody titers to B. abortus are detectable in asymptomatic individuals from these occupational groups using standard serological tests.

    Purpose of the Study:

    • To investigate the prevalence and implications of subclinical Brucella abortus infections in occupational groups.
    • To assess the diagnostic significance of high antibody titers in the absence of clinical symptoms.

    Main Methods:

    • Serological testing (saline agglutination, antihuman globulin, complement fixation) for B. abortus antibodies.
    • Clinical observation and health status assessment in affected occupational groups.

    Main Results:

    • Subclinical B. abortus infections are prevalent, particularly in veterinary surgeons, who may develop hypersensitivity and intermittent illness due to repeated exposure.
    • Infection routes are more commonly associated with contact with infected materials than milk consumption for these professions.
    • High antibody titers against B. abortus were observed in asymptomatic individuals.

    Conclusions:

    • A high B. abortus antibody titer should not be the sole diagnostic criterion for illness in patients from dairy farming or allied occupations.
    • Occupational exposure presents a significant risk for subclinical brucellosis, necessitating careful clinical correlation for diagnosis.

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