the ontogeny of the humoral immune response to a 'thymus dependent ' and a 'thymus independent ' antigen , human gamma globulin ( hgg ) and aeromonas salmonicida ( as ) respectively , was investigated in the fry of rainbow trout , salmo gairdneri , by direct immersion vaccination in the antigens ( dose 5 mg/l hgg ; 10 ( 8 ) cells/ml as ; 30 minutes ) at known ages/weights from 7 days post hatch , and at 1 , 2 , 3 , and 4 months post hatch .
C0020967
humoral immune response
C0003320
antigens