Clinical features and in vitro antimicrobial susceptibilities of community-acquired Klebsiella pneumoniae meningitis in Taiwan

Twenty-seven adult patients were identified as having community-acquired Klebsiella pneumoniae meningitis. The K. pneumoniae isolates, collected from cerebrospinal fluid samples, were tested for in vitro antimicrobial susceptibilities. The prognostic factors of these 27 patients were also analysed. All of the third- and fourth-generation cephalosporins tested, as well as monobactam, carbapenem and ciprofloxacin, had good activities against the isolated K. pneumoniae strains. None of the clinical isolates was detected as being an extended-spectrum beta-lactamase-producing pathogen. Among the third- and fourth-generation cephalosporins, ceftizoxime, cefepime, ceftriaxone and cefotaxime had superior activities, with MIC90s about four- to eight-fold lower than those of ceftazidime and moxalactam. Mortality rates of patients classified by different antimicrobial agents were as follows: ceftazidime 38% (8/21) and cefepime 16.7% (1/6). The presence of septic shock and the initial level of consciousness at the start of appropriate antimicrobial therapy were the major determinants of survival and neurological outcomes in these 27 patients. Early diagnosis and choice of appropriate antibiotics according to antimicrobial susceptibilities may improve therapeutic outcomes.