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  • Title: Keratoconjunctivitis associated with sialodacryoadenitis in rats.
    Author: Lai YL, Jacoby RO, Bhatt PN, Jonas AM.
    Journal: Invest Ophthalmol; 1976 Jul; 15(7):538-41. PubMed ID: 931700.
    Abstract:
    A high incidence of keratoconjunctivitis was observed in a closed colony of inbred Lewis/Wistar rats. Clinical signs including blinking, ocular discharge, circumcorneal flush, corneal opacity, ulceration, pannus, hypopyon, and hyphema were observed at about three weeks of age. Acute disease subsided by six weeks of age, but some lesions progressed to low-grade chronic keratitis. Six per cent of affected rats developed megaloglobus, which usually appeared by three weeks of age. Lesions included focal or diffuse interstitial keratitis, corneal ulceration, anterior synechia, and inflammatory exudate in the anterior chamber. A high incidence of lenticular and retinal degeneration was associated with megaloglobus. Most affected rats also had harderian dacryoadenitis. Sialodacryoadenitis virus (SDA) was recovered from nasal washes, but not from affected eyes. Serological evidence indicated that SDA virus infection was widespread in the colony.
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