Abstract
Antisera from rabbits immunized with two Japanese strains of Borrelia burgdorferi, HP3 an isolate from Ixodes persulcatus and HO14 an isolate from I. ovatus, or the European strain P/Bi isolated from human cerebrospinal fluid (CSF) did not passively protect hamsters from challenge with the infectious strain 297, a North American isolate from patient CSF. Antisera to strains 297 and B31, a North American isolate from I. dammini, however, provided protective effect to challenge with strain 297. Immune mice sera in the presence of homologous B. burgdorferi antigen induced the production of oxygen intermediates from mouse peritoneal exudate cells. Heterologous B. burgdorferi antigen had no effect. These results suggest that antigenic properties of Japanese strains are different from those of North American and European isolates.
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