Which of the following is an example of a localized infection?

• A. Septicemia
• B. HIV infection
• C. Influenza
• D. Boil (furuncle)

Answer: (D)

Verified step by step guidance

1. Step 1: Understand the definition of a localized infection. A localized infection is confined to a specific part of the body, such as a single tissue or organ, and does not spread widely through the bloodstream or other systems.
2. Step 2: Review each option to determine if the infection is localized or systemic. Septicemia is a systemic infection because it involves the presence of pathogens in the bloodstream, spreading throughout the body.
3. Step 3: HIV infection is systemic as well, since it affects the immune system broadly and is not confined to one location.
4. Step 4: Influenza is a respiratory infection that affects multiple parts of the respiratory tract and can have systemic symptoms, so it is not considered localized.
5. Step 5: A boil (furuncle) is a localized infection because it is confined to a specific area of the skin, typically involving a hair follicle and surrounding tissue, making it a classic example of a localized infection.