What is the main goal of the cycle of infection and its control?

• A. The cycle of infection is not preventable
• B. Infection control aims to enhance transmission
• C. Pathogens are transmitted only through direct contact
• D. Pathogens require specific conditions and the goal is to interrupt the cycle at each point

Answer: (D)

The cycle of infection has several links that must all align for an infection to spread: the pathogen, its reservoir, a way to exit, a mode of transmission, a portal of entry, and a susceptible host. The aim of infection control is to break this chain at any one of those points, which stops transmission and protects people from becoming infected. That’s why strategies like hand hygiene, proper use of personal protective equipment, sterilization and disinfection, isolation of infected individuals, vaccination, and environmental cleaning are effective—they interrupt the chain where transmission could occur. Since pathogens rely on specific conditions to spread, interrupts at multiple points reduce opportunities for infection to take hold. The statements suggesting it’s not preventable, or that transmission occurs only through direct contact, don’t fit with how infection spread actually works, whereas interrupting the cycle at each point does fit the goal of infection control.