Final answer:
The presented cases in the clinical focus scenarios illustrate various skin infections, ranging from common bacterial infections to severe cases like necrotizing fasciitis, and how to treat them.
Step-by-step explanation:
The documentation and presentations of the clinical cases suggest different types of skin infections. In one scenario, symptoms such as a rapidly progressing infection, necrotizing fasciitis is suspected. This condition is characterized by swelling, a rash, blistering, gas pockets under the skin, skin turning gray, and pus with a putrid smell. It requires immediate medical attention and intravenous antibiotics. In more common instances, bacterial infections from cuts or wounds can lead to conditions like purulent wounds, which are often treated with topical antibiotics and localized cleaning. Microscopic examination of bacteria from such infections can tell us their shape, size, and arrangement, which can inform treatment decisions. Lastly, skin issues can also arise from allergic reactions, as seen with the example of allergic eczema triggered by sunscreen, treated with moisturizers and avoidance of the allergen.