The bacteria that cause necrotizing fasciitis can enter the body following surgery or injury. They can also enter the body through: 1  minor cuts. 2  insect bites. 3  abrasions.
Gradual definition, taking place, changing, moving, etc., by small degrees or little by little: gradual improvement in health. See more.
The belief in or the policy of advancing toward a goal by gradual, often slow stages. 2. Biology The view that evolution proceeds by imperceptibly small, cumulative steps over long periods of time rather than by abrupt, major changes.