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What is the purpose of the minimal bactericidal concentration (MBC) in antimicrobial susceptibility testing?

Select one:

A. To evaluate the concentration required to kill over 99.9% of the starting bacterial population
B. To determine the effectiveness of antibiotics against specific bacterial strains
C. To assess the potency of antibiotics in inhibiting bacterial growth
D. To measure the lowest antibiotic concentration that prevents visible bacterial growth

Answer :

Final answer:

The minimal bactericidal concentration (MBC) measures the lowest concentration of an antibiotic needed to kill over 99.9% of bacteria, which is crucial for evaluating the effectiveness of antibiotics. This test helps guide treatment options for bacterial infections. Understanding MBC is essential in antimicrobial susceptibility testing to ensure targeted interventions.


Explanation:

Understanding Minimal Bactericidal Concentration (MBC)

The minimal bactericidal concentration (MBC) is a critical parameter in antimicrobial susceptibility testing. Its primary purpose is to evaluate the concentration required to kill over 99.9% of the starting bacterial population. Such testing is essential for determining how effective specific antibiotics are against bacterial strains.

When performing MBC tests, researchers typically start with a known bacterial population and expose it to various concentrations of an antibiotic. After a specific incubation period, the cultures are assessed for viability. If the concentration effectively kills the bacteria, it helps inform clinicians about effective treatment options for infections.

In summary, the MBC is pivotal because it provides insights into the effectiveness, potency, and lethality of antibiotics, ensuring the proper choice of therapeutic options against infections.


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