TREPONEMA PALLIDUM
Treponema pallidum, a Gram-negative spirochaete, causes syphilis, a contagious STD spread through direct contact, including mother-to-child transmission. The disease progresses through primary, secondary, and tertiary stages without treatment, potentially causing severe complications. Laboratory diagnosis relies on serological tests, as the bacterium cannot be cultured in vitro. Prevention includes safe sexual practices and treating infected individuals.
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Bacteriology