The document discusses skin infections and dermatosis. It defines dermatosis as diseases of the integumentary system, including skin, nails, and hair. It describes four main types of skin infections - bacterial, viral, fungal, and parasitic - listing examples of each type and their symptoms. The document also covers causes, diagnosis, treatment and prevention of skin infections. It then discusses various skin conditions that are considered dermatosis, providing examples of common and less common forms.