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Laboratory studies in chronic conjunctivitis.

S Stenson, H Fedukowicz, R Newman

    Annals of Ophthalmology
    |December 1, 1983
    PubMed
    Summary
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    Chronic conjunctivitis is rarely caused by active infection. Conjunctival cultures and cytology help diagnose cases and avoid unnecessary antibiotic use, guiding appropriate patient care.

    Area of Science:

    • Ophthalmology
    • Microbiology
    • Cytopathology

    Background:

    • Chronic conjunctivitis is a common condition with diverse etiologies.
    • Distinguishing between infectious and non-infectious causes is crucial for effective management.
    • The role of routine cultures and cytological examination in chronic conjunctivitis requires clarification.

    Purpose of the Study:

    • To investigate the etiological agents and cytopathological findings in chronic conjunctivitis.
    • To assess the utility of conjunctival cultures and scrapings in diagnosing chronic conjunctivitis.
    • To determine the prevalence of active infection as a cause of chronic conjunctivitis.

    Main Methods:

    • Conjunctival cultures and cytological scrapings were performed on 852 patients with chronic conjunctivitis.

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  • Bacterial cultures were analyzed for microbial identification.
  • Cytological examination focused on epithelial changes, inclusion bodies, inflammatory cells, and microorganisms.

    • Main Results:

    • Bacteria were recovered in 464 cases (54.5%), with Staphylococcus species being predominant (91% of isolates).
    • Cytological findings included atypical epithelium (3 cases), Halberstaedter-Prowazek inclusion bodies (2 cases), eosinophils (104 cases), epithelial degenerative changes (585 cases), crystals (105 cases), and other microorganisms (283 cases).
    • Active infection was identified as an uncommon cause of chronic conjunctivitis.

    Conclusions:

    • Conjunctival cultures are valuable for identifying pathogens and preventing unnecessary antibiotic therapy when no organism is present.
    • Cytological examination serves as a helpful diagnostic adjunct in specific cases, particularly chronic follicular conjunctivitis, suspected drug toxicity/allergy, dry eye, and atypical presentations.
    • The etiological significance of Staphylococcus species isolated from conjunctival cultures in chronic conjunctivitis warrants further investigation.