California Certified Nursing Assistant (CNA) Practice Exam

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Prepare for the California CNA Test. Study with flashcards, multiple-choice questions, hints, and explanations. Get ready to ace your exam efficiently!

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At which point can a healthcare worker interrupt the chain of infection?

Only at the portal of exit
After a susceptible host shows symptoms
At any link of the chain
Only during transmission based precautions

The correct answer is: At any link of the chain

The chain of infection consists of several links, including the infectious agent, reservoir, portal of exit, transmission, portal of entry, and susceptible host. Interrupting this chain at any link can help control and prevent the spread of infection. For instance, measures such as proper hand hygiene can eliminate pathogens (the infectious agent), while vaccines can enhance the immunity of a susceptible host. Additionally, wearing personal protective equipment (PPE) is essential in breaking the transmission link, significantly lowering the risk of infection. Each link provides an opportunity for intervention, which is fundamental in infection control practices. This approach allows healthcare workers to proactively manage risks at various stages rather than only waiting for symptoms or being reactive during certain precautions.