%0 Journal Article
%T A Case of Contagious Ecthyma (Orf Virus) in a Nonmanipulated Laboratory Dorset Sheep (Ovis aries)
%A Gwynne E. Kinley
%A Connie W. Schmitt
%A Julie Stephens-Devalle
%J Case Reports in Veterinary Medicine
%D 2013
%I Hindawi Publishing Corporation
%R 10.1155/2013/210854
%X An approximately 5-month-old laboratory wether, originating from a local vendor with a closed flock and maintained on a preventative medicine plan, presented with a continuum of lesions from hemorrhagic papules, vesicles, and pustules, to multifocal necrotic scabs at the commissure of the lips, medial canthus of the left eye, and distal prepuce. A presumptive diagnosis of Orf virus (ORFV) was made and the sheep was euthanized. A full necropsy was performed, and histopathological evaluation of affected tissues revealed multifocal-to-coalescing necrotizing and proliferative cheilitis and dermatitis with eosinophilic intracytoplasmic inclusion bodies. Electron microscopy findings revealed degenerate keratinocytes containing numerous typical 200¨C300£¿nm wide cytoplasmic parapoxvirus virions, confirming the diagnosis of ORFV. We believe that this animal developed a clinical case of ORFV either due to an adverse reaction to an ORFV vaccine, or this animal had a case of preexisting ORFV which manifested after arrival at our facility. 1. Case History and Presentation On June 13, 2012, an approximately 5-month-old, 24£¿kg, Dorset wether (Ovis aries) was introduced to our facility from a local vendor. Upon arrival, this animal was determined to be healthy based on history, general health, and physical exam. The health certificate that accompanied the animal indicated it had been examined and was clinically free of ORFV, keratoconjunctivitis, contagious foot-rot, and scabies. The WRAIR/NMRC protocol requires all wethers to be sheared, docked, negative for Q fever and ORFV, and dewormed prior to shipment. This animal was acclimated in our vivarium. During the first four days of the acclimation period, the sheep displayed no abnormal behavioral or clinical signs. It demonstrated a healthy appetite and was fed ad libitum Rumilab diet 5508 (LabDiet supplier, Quality Lab Products, Elkridge, MD, USA), Timothy Hay (Kaytee Products, Inc., Chilton, WI, USA), and received water ad libitum. This Dorset sheep was pair-housed in a standard large animal aluminum run with polyvinyl chloride- (PVC-) coated steel mesh floor racks. The environment was maintained at 68 to 72 degrees F, with a relative humidity range of 30 to 70% and a 12£¿:£¿12-hour light£¿:£¿dark cycle. Environmental enrichment was provided in accordance with institute standard operating procedures. All animal handling and husbandry were performed by trained personnel, and the facility was maintained according to accepted animal care and use standards [1]. The sheep was procured for a protocol reviewed and approved by
%U http://www.hindawi.com/journals/crivem/2013/210854/