EXPERIMENTAL SYPHILIS IN THE RABBIT PRODUCED BY THE BRAIN SUBSTANCE OF THE LIVING PARETIC

Area of Science:

• Medical microbiology
• Infectious diseases

Background:

• Neurosyphilis is a severe complication of untreated syphilis.
• The causative agent, Treponema pallidum, can be found in the central nervous system of patients with neurosyphilis.

Purpose of the Study:

• To investigate the infectivity and virulence of spirochaetes isolated from the brain of a patient with general paresis.
• To establish an animal model for studying neurosyphilis.

Main Methods:

• Isolation of spirochaetes from the brain tissue of a patient with general paresis.
• Inoculation of New Zealand White rabbits with the isolated spirochaetes.
• Monitoring rabbits for clinical signs of syphilis and determining the incubation period.

Main Results:

• Spirochaetes isolated from the paretic brain successfully infected rabbits, causing experimental syphilis.
• The spirochaetes demonstrated high virulence, resulting in a significantly shorter incubation period in rabbits compared to previously studied strains.

Conclusions:

• Spirochaetes from human paretic neurosyphilis are infectious and can establish experimental syphilis in rabbits.
• This strain represents a particularly virulent form of the pathogen, offering a valuable model for syphilis research.