significant levels of igm hi antibodies were still detectable 20 days after inoculation ( 5-30 % of total hi antibodies ) and , in some birds , even at 27 days after inoculation ( up to 10 % ) , igg ( 7s ) hi antibodies were low or undetectable on day 6 or 7 after inoculation , then increased rapidly with rapidly rising hi antibody titres .
C0020861
igm
C0003241
antibodies