[Notes on immunology in a series of cases of chronic hepatitis. Cellular immunity and stimulation with PPD]

The authors estimated E, E.A.C., and E-active rosette in 13 chronic active hepatitis (C.A.H.), 5 chronic persistent hepatitis and 4 cirrhosis. The results showed a significant decrease of the concentration of peripheral blood T-lymphocytes in patients with C.A.H., C.P.H., cirrhosis. E.A.C. rosette forming cells were not significantly different from the control population in all groups studied. E-active rosette were decrease in patients with C.A.H. and C.P.H. and were increased after stimulation by P.P.D. (5 U.V.I.) in C.A.H. and C.P.H. and in control group studied.