INCREASED PLASMA-LEVELS OF SOLUBLE CD23 IN HEMORRHAGIC-FEVER WITH RENAL SYNDROME - RELATION TO VIRUS-SPECIFIC IGE

In 15 consecutive patients hospitalized with nephropathia epidemica, a European form of haemorrhagic fever with renal syndrome (HFRS) caused by Puumala virus, plasma concentrations of soluble CD23 (sCD23) and P uumala virus-specific IgE were determined. In the acute phase of illne ss, 11/15 patients had increased sCD23 levels (>91 U/ml), whereas in c onvalescence, values of 8/10 patients were normalized. Maximal sCD23 v alues were correlated to maximal concentrations of Puumala virus-speci fic serum IgE (r = 0.597; P = 0.025). The results are compatible with a known ability of sCD23 to augment IgE production.