Cross-contamination is typically associated with which transmission route?

• A. Via air currents in kitchen
• B. Via hands transferring bacteria to food
• C. Via sealed packaging
• D. Via sunlight exposure

Answer: (B)

Cross-contamination means the transfer of bacteria from one surface to another through contact. In a kitchen, hands are the most common vehicle because they touch raw foods, dirty surfaces, and then ready-to-eat foods, spreading microbes quickly and invisibly. The other routes don’t reflect how contamination typically spreads in food handling: air currents can move particles but aren’t the main mechanism for transferring bacteria to food; sealed packaging actually helps prevent transfer; sunlight exposure doesn’t move bacteria around in the way touching surfaces does and can even reduce bacterial presence. To reduce risk, wash hands thoroughly, keep raw and cooked foods separate, sanitize surfaces and utensils, and store foods properly.