Whole genome sequence of a Treponema pallidum strain from a formalin-fixed paraffin-embedded fine needle aspirate of a cervical lymph node.

A patient with unilateral cervical lymphadenopathy suspicious for malignancy underwent a fine needle aspiration. Histology demonstrated mixed inflammatory infiltrates with abundant spirochetes. Sufficient spirochete DNA was extracted from paraffin-embedded tissue sections to obtain the near-complete genome sequence of a macrolide resistant strain belonging to the SS14 omega strain of Treponema pallidum.