Abstract
Summary
A simple feeding technic for serial passage of rickettsiae in human body lice is described. Consecutive louse passages are not interrupted by growth of the organisms in other host species. Application of the method to serial passages of epidemic and murine typhus rickettsiae is reported. No changes in properties of the strains were noted during louse passage. The multiplication of murine typhus rickettsiae in lice nourished only on human serum is reported.
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