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Equine deep stromal abscesses (51 cases – 2004–2009) – Part 1: the clinical aspects with attention to the duration of the corneal disease, treatment history, clinical appearance, and microbiology results

Authors

  • Michala de Linde Henriksen,

    1. Faculty of Health and Medical Sciences, Department of Veterinary Clinical and Animal Sciences, University of Copenhagen, Frederiksberg, Denmark
    2. Departments of Large and Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL, USA
    3. Department of Veterinary Clinical Sciences, Comparative Ophthalmology, College of Veterinary Medicine, University of Minnesota, Saint Paul, MN, USA
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    • This study is a part of the first author's PhD study performed and sponsored by the University of Copenhagen, Denmark (2008–2013). The cases in the study were collected during the first author's residency in comparative ophthalmology at the University of Florida, USA (2009–2012). The first author is now a faculty member at the University of Minnesota (2013 – present).
  • Pia H. Andersen,

    1. Faculty of Veterinary Medicine and Animal Science, Department of Clinical Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden
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  • Preben D. Thomsen,

    1. Faculty of Health and Medical Sciences, Department of Veterinary Clinical and Animal Sciences, University of Copenhagen, Frederiksberg, Denmark
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  • Caryn E. Plummer,

    1. Departments of Large and Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL, USA
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  • Brendan Mangan,

    1. Departments of Large and Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL, USA
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  • Steffen Heegaard,

    1. Department of Ophthalmology, Glostrup Hospital, University of Copenhagen, Frederiksberg, Denmark
    2. Department of Neuroscience and Pharmacology, Eye Pathology Institute, University of Copenhagen, Frederiksberg, Denmark
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  • Nils Toft,

    1. Faculty of Health and Medical Sciences, Department of Large Animal Sciences, University of Copenhagen, Frederiksberg, Denmark
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  • Dennis E. Brooks

    Corresponding author
    1. Departments of Large and Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL, USA
    • Address communications to:

      D. E. Brooks

      Tel.: +1 (352) 392 2229

      Fax: +1 (352) 392 6125

      e-mail: brooksd@ufl.edu

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Abstract

Objective

To study the equine deep stromal abscesses (DSA) with focus on the duration of the corneal disease, medical treatment, season of presentation, clinical appearance, and the degree of corneal vascularization.

Material and Methods

Equine DSA diagnosed, biopsied, and surgically treated at the University of Florida Veterinary Medical Center (UFVMC) from 2004 to 2009 were identified. The medical record, clinical photographic images, and microbiology results for each case were evaluated. Frequency and prevalence calculation as well as qualitative data analysis was performed for clinical and microbiological data.

Results

Fifty-one equine DSA were included in the study. Spring (March, April, May; 33.4%) and winter (December, January, February; 31.4%) were the most common seasons for DSA presentation. The 51 cases were divided into four categories of focal opacity from their clinical appearance: focal yellow (45.2%), focal white (23.5%), diffuse yellow/white (23.5%), and focal pink (7.8%). 5.9% of the DSA (n = 3) were culture positive for fungal growth, whereas 17.6% were positive for bacterial growth (n = 9). No association between short-/long-term systemically administered NSAID treatment and the corneal vascular response to the corneal lesion could be appreciated.

Conclusion

Equine DSA most often present in the spring and winter in the subtropical environment of the state of Florida (USA). The clinical appearance may have a connection with the etiology and pathogenesis of the equine DSA. No connection between short- or long-term systemically administered NSAID and the degree of corneal vascularization of the DSA was noted.

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