Which of the following is true regarding Haemophilus influenzae and Moraxella catarrhalis?
A. More than 90% of H influenzae isolates produce beta-lactamase enzyme. B. Amoxicillin is active against M catarrhalis, with most strains having MICs of 0.12 mcg/mL to 0.25 mcg/mL. C. Erythromycin remains highly active against most H influenzae isolates. D. Fluoroquinolone resistance among both H influenzae and M catarrhalis is rare. • Which of the following is not an implication of antimicrobial resistance? A. Delayed initiation of antimicrobial therapy B. Inappropriate antibiotic selection C. Improved use of hospital resources D. Prolonged hospital length of stay • Which of the following is false regarding penicillin-resistant S pneumoniae (PRSP)? A. Klepser et al have found that PRSP was associated with increased cost of care. B. According to new break points, PRSP is defined as having an MIC of 2 mg/L. C. Penicillin resistance may not translate into clinical failure. D. Newly developed MIC break points for S pneumoniae may have better clinical correlation. • FQ, a 76-year-old Hisp
