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.
creep. 1  to move slowly with the body close to the ground, as a reptile or an insect, or a person on hands and knees. 2  to approach slowly, imperceptibly, or stealthily (often followed by up): We crept up and peeked over the wall. 3  to move or advance slowly or gradually: The automobile crept up the hill.