Community-acquired bacteremia in adult patients. analysis of 645 episodes

Bacteremia is an important cause of morbimortality. This study describes the episodes of communityacquired bacteremia in adult patients registered at our hospital. Between January 2005 and December 2013, 645 episodes were studied. A total of 51% of patients were male and 49% female. The mean age was 67. The most frequent comorbidities were: diabetes (18%), neoplasia (15%), heart disease (10%) and HIV infection (6%). The focus was: urinary (22%), respiratory (18%), cutaneous (15%), abdominal (13%), and others (4%). Gram-negative bacteria prevailed (51.88%). The most frequent microorganisms were Escherichia coli (30.29%), Streptococcus pneumoniae (15.51%), y Staphylococcus aureus (14.06%). Bacteremia was polymicrobial in 7.14% of the cases. Forty percent of E. coli isolates were resistant to ciprofloxacin and 6% to ceftazidime. Fifteen percent of S. aureus strains were resistant to methicillin whereas only 7% of S. pneumoniae expressed high resistance to penicillin with MICs = 2 µg/ mL, according to meningitis breakpoints.