Some_ occasionally reach the length of 500 micrometer:

Explanation

Spirochetes are a group of bacteria that are characterized by their spiral shape. They are typically long and slender, and some species can indeed reach a length of 500 micrometers or even longer. Spirochetes are known for their unique way of moving by rotating their entire body, which allows them to navigate through various environments, including tissues and body fluids. Some well-known examples of spirochetes include Treponema pallidum, the bacteria that causes syphilis.