What term describes infections of the lungs caused by bacteria, viruses, fungi, protozoa, or other microorganisms?

• A. Pneumonia
• B. Lung infections
• C. TB
• D. Pleurisy

Answer: (B)

Infections of the lungs caused by bacteria, viruses, fungi, protozoa, or other microorganisms are described by the term pneumonia. Pneumonia specifically denotes infection and inflammation of the lung tissue, particularly the air sacs (alveoli), and it can be caused by a wide range of pathogens. This makes it the precise, widely used medical term for lung infections caused by diverse microorganisms. The other options describe either a specific disease (like TB) or a broader or different concept (pleurisy is inflammation of the pleura, and “lung infections” is a general descriptor, not a specific diagnosis).