FIG. 1.

HEV-specific IgA antibodies measured by ELISA in controls and in hepatitis patients. Serum samples were from controls (n = 18), 8 type 1-infected PCR-positive patients (9 samples), 9 type 3-infected PCR-positive patients, 5 type 1 and 3 type 3 follow-up samples from serologically confirmed HEV patients based on a positive IgM and IgG response or PCR-positive result in a previous sample, 20 patients with an IgG response in the immunoblot assay (score of 4 to 12) in the absence of an IgM response, and sera from 6 hepatitis patient with an IgM response only.