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Epidemic hypochlorhydria.

T Gledhill, R J Leicester, B Addis

    British Medical Journal (Clinical Research Ed.)
    |May 11, 1985
    PubMed
    Summary
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    Four subjects developed hypochlorhydria after illness, showing reduced stomach acid and gastritis. A contaminated pH electrode may have transmitted an unidentified pathogen, leading to atrophic gastritis.

    Area of Science:

    • Gastroenterology
    • Microbiology
    • Pathology

    Background:

    • Gastric acid secretion is crucial for digestion and pathogen defense.
    • Hypochlorhydria, a state of low stomach acid, can result from various factors.
    • Gastritis is inflammation of the stomach lining.

    Purpose of the Study:

    • To investigate the cause and consequences of hypochlorhydria in previously healthy subjects.
    • To identify potential infectious agents responsible for gastric dysfunction.
    • To assess the long-term effects of hypochlorhydria on gastric health.

    Main Methods:

    • Longitudinal study of gastric acid output, endoscopic evaluation, and gastric biopsies.
    • Schilling tests for vitamin B12 absorption.
    • Intragastric analysis of bacterial populations, pH, nitrite, and N-nitroso compounds.

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    Main Results:

    • Four of six subjects developed hypochlorhydria with significantly reduced basal and peak acid outputs.
    • Gastric biopsies revealed active superficial gastritis, progressing to chronic gastritis in two subjects.
    • Elevated intragastric nitrite concentrations and high bacterial loads were observed, but no infective cause was identified.

    Conclusions:

    • An unidentified enteric pathogen, possibly transmitted via a contaminated pH electrode, is suspected as the cause of hypochlorhydria and gastritis.
    • Avoid returning gastric juice to the stomach after contact with a contaminated glass electrode to prevent potential atrophic gastritis.