A mouse develops pruritus and hair loss over its dorsum. The skin appears reddened with multifocal crusts and patchy alopecia. Another mouse in the same cage is asymptomatic. There is also a 10-year-old Yorkshire terrier recently diagnosed with allergic dermatitis living in the same household.
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A six-year-old, castrated male Yorkshire Terrier is presented with a 2-year history of coughing. Today the dog is coughing almost constantly. He has cyanotic mucous membranes and markedly increased inspiratory effort. Radiographs had been taken at a previous visit.
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[[Image:Manson SM 5.jpg|center|200px|link=Small Mammals Q&A 05]]
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[[Image:ECC 05.jpg|center|200px|link=Small Animal Emergency and Critical Care Medicine Q&A 05]]
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<center>Test yourself [[Small Animal Soft Tissue Surgery Q&A 13|here]].</center>
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<center>Test yourself [[Small Animal Emergency and Critical Care Medicine Q&A 05|here]].</center>