Beta-lactamase-producing Haemophilus influenzae are resistant to which antibiotic?

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Prepare for the Clinical Laboratory Science Bacteriology Test. Engage with multiple choice questions and flashcards with helpful hints and explanations. Ace your exam confidently!

Multiple Choice

Beta-lactamase-producing Haemophilus influenzae are resistant to which antibiotic?

Explanation:
Beta-lactamase enzymes produced by Haemophilus influenzae break the beta-lactam ring in penicillin, inactivating the drug. Because of this, beta-lactam antibiotics like penicillin are ineffective against these strains. The other drugs listed are not beta-lactams, so their activity isn’t directly compromised by beta-lactamase, though resistance can occur through other mechanisms. Clinically, this means infections with these bacteria are commonly resistant to penicillin but may respond to beta-lactamase inhibitor combinations or to non-beta-lactam antibiotics.

Beta-lactamase enzymes produced by Haemophilus influenzae break the beta-lactam ring in penicillin, inactivating the drug. Because of this, beta-lactam antibiotics like penicillin are ineffective against these strains. The other drugs listed are not beta-lactams, so their activity isn’t directly compromised by beta-lactamase, though resistance can occur through other mechanisms. Clinically, this means infections with these bacteria are commonly resistant to penicillin but may respond to beta-lactamase inhibitor combinations or to non-beta-lactam antibiotics.

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