BACKGROUND: Although Klebsiella pneumoniae is the second most common cause of Gram-negative bloodstream infections, its epidemiology has not been defined in a nonselected population. We sought to describe the incidence of, risk factors for, and outcomes associated with K. pneumoniae bacteremia. METHODS: Population-based surveillance for K. pneumoniae bacteremia was conducted in the Calgary Health Region (population 1.2 million) from 2000 to 2007. RESULTS: A total of 640 episodes of K. pneumoniae bacteremia were identified for an overall annual population incidence of 7.1 per 100,000; 174 (27%) were nosocomial, 276 (43%) were healthcare-associated community onset, and 190 (30%) were community acquired. Elderly patients and men were at highest risk for K. pneumoniae bacteremia. Dialysis, solid-organ transplantation, chronic liver disease, and cancer were the most important risk factors for acquiring K. pneumoniae bacteremia. Rates of resistance to trimethoprim/sulfamethoxazole increased significantly during 2000 to 2007. The case fatality rate was 20%, and the annual population mortality rate was 1.3 per 100,000. Increasing age, nosocomial acquisition, non-urinary and non-biliary focus of infection, and several comorbid illnesses were independently associated with an increased risk of death. CONCLUSION: This is the first population-based study to document the major burden of illness associated with K. pneumoniae bacteremia and identifies groups at increased risk of acquiring and dying of these infections.
BACKGROUND: Although Klebsiella pneumoniae is the second most common cause of Gram-negative bloodstream infections, its epidemiology has not been defined in a nonselected population. We sought to describe the incidence of, risk factors for, and outcomes associated with K. pneumoniae bacteremia. METHODS: Population-based surveillance for K. pneumoniae bacteremia was conducted in the Calgary Health Region (population 1.2 million) from 2000 to 2007. RESULTS: A total of 640 episodes of K. pneumoniae bacteremia were identified for an overall annual population incidence of 7.1 per 100,000; 174 (27%) were nosocomial, 276 (43%) were healthcare-associated community onset, and 190 (30%) were community acquired. Elderly patients and men were at highest risk for K. pneumoniae bacteremia. Dialysis, solid-organ transplantation, chronic liver disease, and cancer were the most important risk factors for acquiring K. pneumoniae bacteremia. Rates of resistance to trimethoprim/sulfamethoxazole increased significantly during 2000 to 2007. The case fatality rate was 20%, and the annual population mortality rate was 1.3 per 100,000. Increasing age, nosocomial acquisition, non-urinary and non-biliary focus of infection, and several comorbid illnesses were independently associated with an increased risk of death. CONCLUSION: This is the first population-based study to document the major burden of illness associated with K. pneumoniae bacteremia and identifies groups at increased risk of acquiring and dying of these infections.
Authors: Michelle K Paczosa; Rebecca J Silver; Anne L McCabe; Albert K Tai; Colin H McLeish; David W Lazinski; Joan Mecsas Journal: Infect Immun Date: 2020-03-23 Impact factor: 3.441
Authors: Gisele Peirano; Johann Dd Pitout; Kevin B Laupland; Bonnie Meatherall; Daniel B Gregson Journal: Can J Infect Dis Med Microbiol Date: 2013 Impact factor: 2.471
Authors: Rebecca J Silver; Michelle K Paczosa; Anne L McCabe; Joan-Miquel Balada-Llasat; James D Baleja; Joan Mecsas Journal: Antimicrob Agents Chemother Date: 2019-07-25 Impact factor: 5.191
Authors: Andrés F Henao-Martínez; Guido R González-Fontal; José R Castillo-Mancilla; Ivana V Yang Journal: Int J Infect Dis Date: 2013-01-10 Impact factor: 3.623