PT - JOURNAL ARTICLE AU - J W Lawton AU - R Hopkins AU - I C Paterson AU - P C Das TI - ad and ay subtypes of hepatitis B antigen in a case of hypogammaglobulinaemia. AID - 10.1136/jcp.28.11.863 DP - 1975 Nov 01 TA - Journal of Clinical Pathology PG - 863--867 VI - 28 IP - 11 4099 - http://jcp.bmj.com/content/28/11/863.short 4100 - http://jcp.bmj.com/content/28/11/863.full SO - J Clin Pathol1975 Nov 01; 28 AB - We describe the finding of d and y specificities of hepatitis B surface antigen (HBsAg) in a case of hypogammaglobulinaemia of the 'common variable' type treated with fresh frozen plasma infusions. Absorption studies show that the two specificities are on separate particles, suggesting dual infection. It raises important questions regarding the relationship between HBsAg persistence and the immune status of the carrier.