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Veterinary Pathology, Vol 33, Issue 3 332-336, Copyright © 1996 by American College of Veterinary Pathologists

ARTICLES

Effect of substrate on indirect immunofluorescence test for canine pemphigus foliaceus

T. Iwasaki, M. Shimizu, H. Obata, M. Ogata, M. Nagata, T. Yanai, H. Kitagawa and Y. Sasaki
Veterinary Medical Teaching Hospital, Gifu University, Japan.

The effect of substrate on indirect immunofluorescence (IIF) tests for the detection of circulating autoantibodies was studied by examining sera from 14 canine pemphigus foliaceus patients, six sera with non-pemphigus dermatoses and ten normal dog sera against five different substrates from three species. These substrates included bovine esophagus, bovine nose, bovine tongue, monkey esophagus, and canine nose skin. Nine out of 14 (64.3%) sera from patients with canine pemphigus foliaceus showed intercellular space staining by indirect immunofluorescence using bovine esophagus as substrate. However, sera from nonpemphigus dermatoses and normal dog did not react with bovine esophagus. In other substrates, only bovine tongue showed 1/8 (12.5%) positive reaction at the intercellular space by sera from canine pemphigus foliaceus. Dog nose skin showed the intercellular space staining against ten of ten (100%) normal dog serum. Monkey esophagus showed the fluorescent deposit at the intercellular space in four of nine (44.4%) of pemphigus foliacues dog sera, however, four of ten (40%) of normal dog sera revealed nonspecificity intercellular staining. These results indicate that the sensitivity and the specifity of IIF test in canine pemphigus foliaceus depend on the substrate. The best substrate for detecting circulating autoantibody in canine pemphigus foliaceus patients among five different substrates was bovine esophagus because of its sensitivity and high specificity. The diagnosis of canine pemphigus foliaceus should be made on the basis of a combination of clinical signs, histopathology, direct immunofluorescence, and the detection of circulating autoantibody.
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 Journal of the American Animal Hospital AssociationHome page
R. S. Mueller, I. Krebs, H. T. Power, and K. V. Fieseler
Pemphigus foliaceus in 91 dogs.
J. Am. Anim. Hosp. Assoc., May 1, 2006; 42(3): 189 - 196.
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