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We believe this report represents the first of traumatic hemorrhage from splenosis which necessitated operation. We discuss previous reports of complications as a result of splenosis. With the increased interest in autotransplantation of splenic remnants following splenectomy, we expect that this complication may be reported with increasing frequency.

SUMMARY The effects of passive immunization with immunoglobulin Y (IgY) on the pathogenesis of Marek's disease (MD) were examined in an experimental line of White Leghorn chickens highly susceptible to MD. Purified IgY with anti-MDV antibody activity, when injected into chicks, delayed the development of MDV viremia and lesions until 9 days postinoculation (PI) with Marek's disease virus (MDV). The blastogenic response of spleen cells to concanavallin-A was depressed at 6 days PI in the birds without passive immunization, whereas it was not totally depressed until 17 days in birds passively immunized with IgY anti-MDV antibody.