TABLE 4.

Infectivity of B. burgdorferi B31 in mice and ticks

CloneInfection routeNo. of mouse sera reactive with P39/ total no.No. of posi- tive tissues/ total no.aNo. of ticks positive by IFA/total no.
P1.1Needle inoculation3/34/624/24b
Tick bite3/36/99/9c
6/6d
25.1-E1Needle inoculation3/36/95/9b
Tick bite1/32/95/9c
3/6d
  • a Three tissues were analyzed per mouse.

  • b Larval ticks.

  • c Nymphal ticks.

  • d Adult ticks.