Which of the following is considered a contagious disease?

Impetigo is recognized as a contagious disease primarily due to its bacterial nature, specifically caused by Staphylococcus aureus or Streptococcus pyogenes. It manifests as red sores or blisters, often occurring on the face, especially around the nose and mouth, and can spread through direct contact or by sharing items like towels or utensils with an infected person. This characteristic of transmission sets it apart from the other conditions listed.

Psoriasis, eczema, and rosacea are not contagious. Psoriasis is a chronic autoimmune condition characterized by rapid skin cell turnover, and while it can appear similar to other skin issues, it isn't transmitted between individuals. Eczema involves inflammatory skin conditions that may be triggered by genetic or environmental factors rather than contagion. Rosacea is linked to a variety of causes including vascular issues and is not spreadable. Understanding these distinctions is crucial for estheticians, as it informs their practices and client interactions regarding skin health and safety.