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.
Definition of spiral for English Language Learners. : 1  to move in a circle around a central point while getting closer to or farther away from it : to move in a spiral. : 2  to greatly increase, decrease, or get worse in a continuous and usually fast and uncontrolled way.