Authors
Treponema pallidum-immobilizing (TPI) antibodies were examined in intradermally infected inbred strain 13 and adoptively immune inbred strain 2 guinea pigs. Both strains of animals produced TPI antibodies at or after 90 days of infection. TPI antibodies were not associated with the protective mechanism(s) operative after challenge in adoptively immune animals.
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Wicher et al. (1989) studied this question.
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