Syphilis
Characteristics of Spirochetes: 1) Vary in size from 5 to 500 µm in length. 2) Many of them are free-living saprophytes (microorganism that lives on dead), while a few are obligate parasites. 3) Are thin, helical (0.1–0.5 × 5–20 µm), and Gram negative . 4) Are also elongated, motile, and flexible bacteria, twisted spirally along the long axis, giving these bacteria the name spirochetes (Spira meaning coiled, chait meaning hair). 5) The presence of endoflagella . 6) Exhibit three types of motility: (a) flexion and extension, (b) corkscrew- like rotatory movement, and (c) translatory motion. Examples of genera of Spirochetes: Treponema and Borrelia which causes diseases to human. Common diseases occurred by Spirochetes: Treponema: Are short and slender spirochetes with fine spirals and pointed ends. They are causative agent of syphilis. Morphology: 1) Is a thi...