A nurse is starting an IV on a patient. The nurse removes the needle and does not occlude the vein. The blood comes in contact with the nurse’s skin. What level of the epidemiological triangle does the blood represent?
Vector
Agent
Environment
Host
The Correct Answer is B
Choice A reason: Vectors, like mosquitoes, biologically transmit pathogens, as in malaria. Blood here isn’t a living carrier but a medium containing potential agents, like hepatitis viruses, making it distinct from the active, intermediary role vectors play in disease spread epidemiologically and consistently.
Choice B reason: The agent in the epidemiological triangle is the pathogen causing disease, like viruses in blood. Here, blood contacting skin carries potential infectious agents, such as HIV, directly linking it to the causative factor in this exposure scenario biologically and accurately.
Choice C reason: Environment includes external factors, like contaminated surfaces, facilitating transmission. Blood is the direct pathogen source, not a setting or condition, distinguishing it as the agent itself rather than the broader context of exposure in this epidemiological model clearly.
Choice D reason: The host is the affected organism, here the nurse or patient, not the blood. Blood carries the agent, like bacteria, targeting the host’s susceptibility, separating it from the recipient role hosts play in disease dynamics distinctly and fundamentally here.
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Related Questions
Correct Answer is A
Explanation
Choice A reason: Creating a program is policy development to address vaping. This fits public health core functions precisely. It’s universally recognized, distinctly about shaping health strategies effectively.
Choice B reason: Assurance ensures service delivery, not program creation directly. Policy fits better, per nursing standards. This errors in focus. It’s universally distinct.
Choice C reason: Primary prevention reduces vaping; this is program design. Policy development applies, per public health. This misaligns with core function. It’s universally distinct.
Choice D reason: Assessment identifies vaping issues, not program implementation. Policy development is correct, per nursing. This errors in action type. It’s universally distinct.
Correct Answer is D
Explanation
Choice A reason: Spinach isn’t a common botulism source; damaged cans are riskier. This errors per epidemiology standards. It’s universally distinct, less associated.
Choice B reason: Petting zoos spread other diseases, not botulism typically. Cans fit better, per nursing. This misaligns with risk factors. It’s universally distinct.
Choice C reason: Pork can carry pathogens, but botulism ties to canning issues. This errors per public health data. It’s universally distinct, not primary.
Choice D reason: Bent cans foster botulism growth, the greatest risk factor here. This aligns with epidemiology standards. It’s universally recognized, distinctly accurate.
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