Shape of Treponema pallidum.
Treponema pallidum was found to be not helical, but a flat wave twisted into one to five different planes per cell.
D001431:Bacteriological Techniques; D007919:Leptospira / Q000166:cytology; D008858:Microscopy, Phase-Contrast; D013142:Spirochaeta / Q000166:cytology; D014208:Treponema / Q000166:cytology; D014210:Treponema pallidum / Q000166:cytology*