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  • Title: Immunoglobulin G responses in 21 dogs with skin diseases to antigens from different isolates of Staphylococcus intermedius.
    Author: Neuber AE, Thoday KL, Hill PB.
    Journal: Vet Rec; 2008 Jan 19; 162(3):75-9. PubMed ID: 18204030.
    Abstract:
    The aim of this study was to characterise the immunoglobulin G (IgG) response in 21 dogs with or without pyoderma to antigens from six isolates of Staphylococcus intermedius. The staphylococcal proteins were separated by sodium dodecyl sulphate polyacrylamide gel electrophoresis, transferred electrophoretically on to a membrane and subjected to immunoblotting with the dogs' serum. Gels containing separated proteins from the six isolates revealed 29 to 33 distinct bands with molecular weights ranging from 20 to 230 kDa. All the dogs' sera contained IgG that recognised 12 to 24 bands (mean 17), regardless of whether the dogs had pyoderma. The recognised proteins had molecular weights ranging from 20 to 198 kDa but the majority had molecular weights below 75 kDa. The most intense band in all six isolates had a molecular weight of 28 to 29 kDa. The antibody responses to the six isolates were essentially similar except that there were significantly more bands in the response to isolate 2 than to isolate 6, and occasional differences in the intensity of individual bands. All 21 dogs mounted an IgG response to multiple antigens in S intermedius, which differed only marginally between the six isolates. This lack of variation provides evidence that the host's response to different isolates of S intermedius is not a major factor in canine pyoderma.
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