Test on EUCAST Expected Resistant Phenotypes
EUCAST Expected Resistant Phenotypes: Guide for Students
Test: Antimicrobial susceptibility testing
20 questions
Question 1: Haemophilus influenzae has an expected resistant phenotype to trimethoprim.
A. Ano
B. Ne
Explanation: According to Table 3, Rule 3.1, Haemophilus influenzae has an expected resistant phenotype to fusidic acid and streptogramins. Trimethoprim is not listed as an expected resistant phenotype for Haemophilus influenzae in the provided materials.
Question 2: For a microorganism exhibiting an expected resistant phenotype, if a result is desired, laboratories are expected to report the isolate as resistant without performing a susceptibility test.
A. Ano
B. Ne
Explanation: When isolates of a species show an expected resistant phenotype, testing should normally be avoided. If a result is desired, laboratories are expected to report the isolate as resistant without testing.
Question 3: Is Listeria monocytogenes expected to be susceptible to ceftazidime?
A. Ano
B. Ne
Explanation: According to Table 4, Listeria monocytogenes is expected to be resistant to ceftazidime.
Question 4: Is Proteus mirabilis expected to be resistant to ampicillin/amoxicillin, amoxicillin-clavulanic acid, and cefazolin?
A. Ano
B. Ne
Explanation: According to EUCAST Table 1, Proteus mirabilis (Rule 1.12) is expected to be resistant (R) to Ampicillin/Amoxicillin, Amoxicillin-clavulanic acid, and Cefazolin.
Question 5: For a microorganism identified as having an expected resistant phenotype to a specific antimicrobial agent, a susceptible result from a susceptibility test always confirms the accuracy of both the species identification and the test result.
A. Ano
B. Ne
Explanation: The presence of an unexpected phenotype, such as a susceptible result for a microorganism with an expected resistant phenotype, indicates that the laboratory should check the species identification, the susceptibility test results, or both. It does not confirm accuracy.