Abstract
Peripheral blood lymphocyte subpopulations were studied in 12 German shepherd dogs suffering from deep pyoderma (GSP). Twelve other healthy but matched dogs were used as controls. GSP was found to be associated with an imbalance in the CD4 and CD8 subsets (respectively 37.3±8.7% and 28.6±6.6%, as compared to 47.5±8.8% and 19.3±4.0% in the controls). The activation markers were not affected by GSP. Moreover, analysis of the B-cell populations showed a striking decrease in the level of CD21 cells (5.5±3.3% of CD21 + lymphocytes, compared to 12.2±6.0 in the controls). This study suggests that the immunological imbalance observed in GSP may be associated with defective helper cells, and provides further evidence that dogs suffering from GSP are not immunologically normal reactors.
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