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Detection of Antibodies in Serum Specimens from Dogs with Blastomycosis with Lysate Antigens Prepared from Four Blastomyces dermatitidis Dog Isolates: Individual Antigens vs Antigen Combinations

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DOI: 10.4236/ojvm.2013.34037    3,012 Downloads   4,445 Views   Citations

ABSTRACT

Blastomycosis, the systemic fungal infection of humans and animals, has presented a diagnostic challenge to clinicians and laboratory personnel for many years. Our laboratory has been concentrating on attempting to develop antigenic reagents from the yeast phase of various isolates of Blastomyces dermatitidis and to evaluate these lysate antigens with regard to antibody detection in blastomycosis. The aim of this current study was to evaluate yeast phase antigens prepared from four dog isolates of B. dermatitidis and to evaluate their efficacy, when used individually or in combination, for antibody detection in sera from dogs with blastomycosis. Mean absorbance values using the ELISA to assay 24 serum specimens (Trial 1) ranged from 0.588 with an individual lysate antigen to 0.992 when three reagents were combined. Eight of the lysates exhibited mean absorbance values ranging from 0.992 to 0.915 with 7 out of 8 being lysate antigen combinations. Mean absorbance values with the other 6 lysates ranged from 0.899 to 0.588. In Trial 2, the 6 most sensitive reagents from Trial 1 were assayed against 10 highly reactive dog sera. The results of Trial 2 showed that 5 antigen combinations detected antibody to a greater degree than the individual lysate antigen. Combinations of northern and southern antigens were able to detect antibody in serum specimens from either of these geographical regions. Comparative studies are continuing to further evaluate various lysate antigen combinations for antibody detection in blastomycosis.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

J. VanDyke, A. Boyd, J. Sorensen, T. Hine, C. Rayner, A. Zamora and G. Scalarone, "Detection of Antibodies in Serum Specimens from Dogs with Blastomycosis with Lysate Antigens Prepared from Four Blastomyces dermatitidis Dog Isolates: Individual Antigens vs Antigen Combinations," Open Journal of Veterinary Medicine, Vol. 3 No. 4, 2013, pp. 235-239. doi: 10.4236/ojvm.2013.34037.

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