Multiple-drug-resistant microbes _____________________ .
a. Are resistant to all antimicrobial agents
b. Respond to new antimicrobials by developing resistance
c. Frequently develop in hospitals
d. All of the above

검증된 단계별 안내

Step 1: Understand the term 'multiple-drug-resistant microbes' (MDR microbes). These are microorganisms that have developed resistance to multiple antimicrobial drugs, making infections caused by them difficult to treat.

Step 2: Analyze option (a): 'are resistant to all antimicrobial agents.' Consider whether MDR microbes are resistant to every antimicrobial agent or just several, and understand the difference between multidrug resistance and pan-resistance.

Step 3: Analyze option (b): 'respond to new antimicrobials by developing resistance.' Reflect on how microbes can adapt over time, especially under selective pressure from antimicrobial use, leading to resistance development.

Step 4: Analyze option (c): 'frequently develop in hospitals.' Think about the hospital environment, where antimicrobial use is high and patients are vulnerable, creating conditions that favor the emergence of MDR microbes.

Step 5: Combine your understanding of all options to determine if 'all of the above' (option d) correctly summarizes the characteristics of multiple-drug-resistant microbes.

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주요 개념

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Definition of Multiple-Drug-Resistant Microbes

Multiple-drug-resistant microbes are microorganisms that have acquired resistance to several antimicrobial drugs, making infections difficult to treat. They are not necessarily resistant to all drugs but show resistance to multiple classes of antibiotics.

Mechanisms of Resistance Development

Microbes can develop resistance through genetic mutations or acquiring resistance genes, often in response to exposure to new antimicrobials. This adaptive process allows them to survive treatments that would normally kill them or inhibit their growth.

Hospital Environment and Resistance

Hospitals are common sites for the emergence and spread of drug-resistant microbes due to high antibiotic use and vulnerable patient populations. This environment promotes selection and transmission of resistant strains, leading to frequent outbreaks.

Multiple-drug-resistant microbes _____________________ .a. Are resistant to all antimicrobial agentsb. Respond to new antimicrobials by developing resistancec. Frequently develop in hospitalsd. All of the above