Detecting Reporting Resistance in Fastidious Bacteria - SWACM

Moraxella catarrhalis
“If desired, -lactamase testing can be performed, using
chromogenic cephalosporin methods such as
nitrocefin.” (>90% -lactamase positive)
Respiratory infections due to M. catarrhalis respond to
drugs commonly prescribed (e.g., amoxicillin/clavulanic
acid, macrolide) for respiratory tract infections
“Testing may be useful for epidemiological purposes or
for management of patients with prolonged or severe
infections.”
In addition to MIC method, disk diffusion can now be
used for: amoxicillin-clavulanic acid, azithromycin,
clarithromycin, erythromycin, tetracycline, and TMP-
SMX
CLSI M45-A2 Table 12