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What you should know:

Treponema is a Gram-negative Spirochaete. T. pallidum is the cause of syphilis. All spirochaetes have an axial filament which gives them a characteristic corkscrew appearance and helps them to move through viscous mucus.


Domain Bacteria

    Phylum Spirochaetes

        Class Spirochaetes

Bergey's Manual Volume 5: The Planctomycetes, Spriochaetes, Fibrobacteres, Bacteriodetes and Fusobacteria