This document discusses bacterial motility and the different types and mechanisms of bacterial movement. It covers: - Motility is the ability of cells to move on their own using energy. The main types are flagellar movement and gliding movement. - Flagella are thin appendages that propel bacteria through rotation. Their structure includes a filament, basal body and hook. Arrangements can be monotrichous, lophotrichous or peritrichous. - Motility allows bacteria to find favorable environments and colonize host cells. Methods to detect motility include wet mount microscopy, staining techniques like Leifson's method, and using semi-solid media.