What is the term for when body tissues are invaded by disease-causing bacteria?

• A. Infection
• B. Pus
• C. Contagious
• D. Local infection

Answer: (A)

Infection is when disease-causing bacteria invade and multiply in body tissues, triggering inflammation and illness. This can show up as a localized problem in one area or become more widespread. In a salon setting, preventing infection relies on strict sanitation, proper sterilization, hand hygiene, and using protective barriers to stop bacteria from entering tissues. Pus isn’t the act of invasion itself; it’s a collection of immune cells and debris that can form at an infection site as the body fights the bacteria. Contagious describes how easily a disease can spread from person to person, not the invasion of tissue. Local infection refers to an infection confined to a specific area, but the broader idea is infection—the invasion and growth of disease-causing bacteria in tissues.