Spread through contaminated or infected food.

• A. Casual Transmission
• B. Airborne Transmission
• C. Sexual Transmission
• D. Foodborne Transmission

Answer: (D)

Spread through contaminated or infected food focuses on infections that reach a person when they eat or drink something carrying pathogens. This is foodborne transmission: the illness starts after ingested contaminants in food, which can come from improper handling, cross-contamination between raw and ready-to-eat foods, or not cooking food to safe temperatures. Understanding this route emphasizes why safe food practices matter—washing hands, avoiding cross-contamination, cooking foods to proper temperatures, and refrigerating perishable items promptly all help prevent illness from this pathway. This differs from airborne transmission, which involves pathogens moving through the air; sexual transmission, which requires sexual contact; and casual transmission, which isn’t a standard route for foodborne pathogens.