Effect of active and passive antibacterial immunization on skin allograft survival in rabbits

The effect of active and passive antibacterial immunization on transplantation immunity was investigated in rabbits. Immunization with dead bacterial vaccines prepared from E. coli, Proteus mirabilis and Pseudmonas aeruginosa had no effect on skin allograft survival, whereas immunization with vaccines prepared from streptococcal and staphylococcal strains shortened allograft survival. Similar results were obtained with specific antisera against individual microbial species. Skin allografts survived in rabbits treated with antisera against E. coli, Proteus mirabilis and Pseudomonas aeruginosa in the same manner as in untreated controls, whereas allograft survival was shortened with antisera against streptococci or staphylococci. The possible mechanism of the stimulatory effect of Gram-positive cocci on transplantation immunity is discussed and the possibilities of using active and passive antibacterial immunication in clinical transplantation are considered.