Table 1.

Infections of irradiated mice with two culture-derived isolates serotype 33 of B. hermsii strain HS1

Expt no.SerotypeNo. of mice infected/no. of mice examined on day of infection (no. of spirochetes/ml of blood in infected mice)
2345812
133 (7)0/102/2 (105)2/10 (105)
33 (21)10/10 (106)0/44/10 (106)
2610/10 (107)3/3 (107)NDa
233 (7)0/100/40/43/6 (106)
33 (21)10/10 (105)2/4 (105)0/41/3 (106)
710/10 (106)4/4 (107)3/3 (107)ND
  • a ND, not done.