A certain type of acarus, Sarcoptes scabiei, is the major source of scabies. The mite tries to get deep under the victim’s skin to continue its development and reproduction. The risks are higher when people travel in the zones populated by these mites. They are barely met in the United States, so it’s not that easy to catch the disease. Once the mite discovers a perfect place for its eggs under the skin, it leaves a lot of potential bugs in the sores. The maggots move up, closer to the top layers of the skin.