Skin-to-skin contact with someone who has scabies poses a risk for infection. This contact must be prolonged, a hug or handshake will not spread them. Scabies is found worldwide and can spread rapidly in situations where close body and skin contact happens frequently.
It is commonly seen in children and their mothers as well as teenagers who are sexually active. Those who live in nursing and other care homes are likely candidates for scabies. Nursing homes, extended care facilities, prisons, and even child care facilities are institutions that most commonly have scabies outbreaks. Anyone who has a weakened immune system is susceptible to easily contracting it.
Intense Itching can cause skin sores that can lead to infection by bacteria such as Staphylococcus aureus or beta-hemolytic streptococci.
Scabies symptoms are intense itching or a rash or sores forming on the skin. The sores may harden and crust over in severe cases, meaning there are now hundreds of mites in the skin. Sever itching especially at night is a first symptom of scabies. Crusted scabies is a more severe form of scabies and can happen to elderly that are immunocompromised or have conditions that keep them from moving.
A doctor will perform a skin examination In order to diagnose scabies and will most likely remove a bit of the infected area and inspect it under a microscope.
Diagnosis is often made by the appearance of rash and presence of burrows. When possible it should be confirmed by finding mites, mite eggs, or fecal matter.
American Academy of Dermatology
Center for Disease Control