TABLE 3.

Serology and reisolation from mice after feeding infected I. scapularis nymphs

StrainNo. of nymphs/mouse% of infected nymphsaNo. of culture-positive micebNo. of mouse sera reactive with P39
BladderSkinJoints
B31 MI15502/22/22/22/2
B12071.40/30/30/30/3
  • a The percentage of infected nymphs was determined by immunofluorescence microscopy of tick midguts with polyclonal rabbit serum against B. burgdorferi.

  • b Growth of spirochetes from cultures of skin, joints, and bladder in BSK-II medium. Cultures were considered negative when no spirochetes could be detected by 6 weeks after tissue inoculation.