The term describing invasion or colonization of the body by pathogenic bacteria is which of the following?

• A. Disease
• B. Infestation
• C. Infection
• D. Syndromes

Answer: (C)

Infection is the process where pathogenic bacteria invade or colonize the body, multiply, and trigger a host response. This term specifically describes the presence and activity of harmful microbes within the host, which may or may not lead to symptoms or illness. Infestation refers to parasites like insects or mites living on or inside a host, often without the bacterial context. Syndromes are groups of signs and symptoms that can arise from various diseases, not the act of bacterial invasion. Disease describes the state of ill health that results from a condition like infection, but the term infection focuses on the actual invasion and colonization by the bacteria.