Table 1

Survival of hamsters infected with control or mutant strains of L. interrogans serovar Manilae or L. interrogans serovar Pomona

Strain or mediumDescriptionDoseSurvival ratea
Wild-type serovar Pomona strain LT993Parent strain1040/10
P52lipL41 mutant1040/10
Wild-type serovar Manilae strain L495Parent strain1030/10
M874lep mutant1030/10
EMJH mediumNegative control10/10
  • a Given as the number of animals surviving/total number of animals in the group. The survival of animals infected with mutants was not significantly different (by Fisher's exact test) from the survival of those infected with the corresponding control strains.