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Investigative Ophthalmology & Visual Science, Vol 36, 1181-1183, Copyright © 1995 by Association for Research in Vision and Ophthalmology

ARTICLES AND REPORTS

Cold stress-induced recurrences of herpetic keratitis in the squirrel monkey

ED Varnell, HE Kaufman, JM Hill and HW Thompson
LSU Eye Center, New Orleans 70112, USA.

PURPOSE. Models of recurrent herpetic keratitis that depend on tissue damage or immunosuppression have been described. The authors report a model that depends only on minimal temperature stress to produce clinical recurrences in a small primate. METHODS. Squirrel monkeys (Saimiri sciureus) infected by the ocular route with the Rodanus strain of herpesvirus type 1 (HSV-1) were exposed to temperatures approximately 5 degrees C lower than the usual ambient temperature for periods as short as 12 hours. RESULTS. The corneas showed more or larger lesions typical of recurrent herpetic keratitis than are usually seen in these animals under normal conditions. Statistical analysis showed that there were significantly higher frequencies of epithelial keratitis at 18 degrees C and 20 degrees C (P < 0.0001). CONCLUSIONS. A minimal temperature change produced significant recurrences in this small animal within a short time. Tissues were not damaged to produce the recurrences. This approach may provide an efficient primate model for rapid testing of drugs to prevent clinical recurrence of ocular herpetic keratitis.


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