How do you catch impetigo?

Germs get into skin: Impetigo appears after germs get access to the deeper layers of the skin surface. Often a kid with contaminated fingers will scratch a bite or itchy place & open the deeper skin layers where the germs can live off the moisture & serum oozing into the scratch. The germs often produce chemicals that get into the skin & spread redness & germ growth.Some germs are more likely than others to cause it.