BACKGROUND: Methicillin-resistant Staphylococcus aureus (MRSA) bloodstream infections (BSIs) can cause significant morbidity and mortality in patients with cancer. However, data on outcomes of patients treated with vancomycin are lacking. METHODS: We identified 223 patients with cancer who developed MRSA BSIs between January 2001 and June 2009 and were treated with vancomycin. Treatment failure was defined as death within 60 days of infection, persistent bacteremia ≥5 days, fever ≥4 days, recurrence or relapse, and secondary MRSA infection. RESULTS: The treatment failure rate was 52% (116 of 223 patients). These patients were more likely to have been hospitalized, been treated with steroids within the previous 3 months, developed acute respiratory distress syndrome, required mechanical ventilation, required intensive care unit care, and community-onset infections (all p < .05). Risk factors for MRSA-associated mortality (27 of 223 patients; 12%) included hematologic malignancy and hematopoietic stem cell transplantation, community-onset infection, secondary BSI, MRSA with minimum inhibitory concentration (MIC) ≥2.0 μg/mL, mechanical ventilation, and a late switch to an alternative therapy (≥4 days after treatment failure; all p < .05). On multivariate analysis, mechanical ventilation and recent hospitalization were identified as independent predictors of vancomycin failure, and community-onset infection, secondary BSIs, and MIC ≥2 μg/mL were identified as significant predictors of MRSA-associated mortality. CONCLUSIONS: We found a high treatment failure rate for vancomycin in patients with cancer and MRSA BSIs, as well as a higher mortality. A vancomycin MIC ≥2 μg/mL was an independent predictor of MRSA-associated mortality. An early switch to an alternative therapy at the earliest sign of failure may improve outcome.
BACKGROUND: Methicillin-resistant Staphylococcus aureus (MRSA) bloodstream infections (BSIs) can cause significant morbidity and mortality in patients with cancer. However, data on outcomes of patients treated with vancomycin are lacking. METHODS: We identified 223 patients with cancer who developed MRSA BSIs between January 2001 and June 2009 and were treated with vancomycin. Treatment failure was defined as death within 60 days of infection, persistent bacteremia ≥5 days, fever ≥4 days, recurrence or relapse, and secondary MRSA infection. RESULTS: The treatment failure rate was 52% (116 of 223 patients). These patients were more likely to have been hospitalized, been treated with steroids within the previous 3 months, developed acute respiratory distress syndrome, required mechanical ventilation, required intensive care unit care, and community-onset infections (all p < .05). Risk factors for MRSA-associated mortality (27 of 223 patients; 12%) included hematologic malignancy and hematopoietic stem cell transplantation, community-onset infection, secondary BSI, MRSA with minimum inhibitory concentration (MIC) ≥2.0 μg/mL, mechanical ventilation, and a late switch to an alternative therapy (≥4 days after treatment failure; all p < .05). On multivariate analysis, mechanical ventilation and recent hospitalization were identified as independent predictors of vancomycin failure, and community-onset infection, secondary BSIs, and MIC ≥2 μg/mL were identified as significant predictors of MRSA-associated mortality. CONCLUSIONS: We found a high treatment failure rate for vancomycin in patients with cancer and MRSA BSIs, as well as a higher mortality. A vancomycin MIC ≥2 μg/mL was an independent predictor of MRSA-associated mortality. An early switch to an alternative therapy at the earliest sign of failure may improve outcome.
Authors: C Garrigós; O Murillo; G Euba; R Verdaguer; F Tubau; C Cabellos; J Cabo; J Ariza Journal: Antimicrob Agents Chemother Date: 2010-10-04 Impact factor: 5.191
Authors: Leonard A Mermel; Michael Allon; Emilio Bouza; Donald E Craven; Patricia Flynn; Naomi P O'Grady; Issam I Raad; Bart J A Rijnders; Robert J Sherertz; David K Warren Journal: Clin Infect Dis Date: 2009-07-01 Impact factor: 9.079
Authors: M Dryden; A T Andrasevic; M Bassetti; E Bouza; J Chastre; G Cornaglia; S Esposito; G French; H Giamarellou; I C Gyssens; D Nathwani; S Unal; A Voss Journal: Clin Microbiol Infect Date: 2010-03 Impact factor: 8.067
Authors: Roy F Chemaly; Ray Y Hachem; Rola N Husni; Boulos Bahna; Georges Abou Rjaili; Georges Abou Rjaili; Alain Waked; Linda Graviss; B Nebiyou Bekele; Jharna N Shah; Issam I Raad Journal: Ann Surg Oncol Date: 2010-02-03 Impact factor: 5.344
Authors: M Lefebvre; C Jacqueline; G Amador; V Le Mabecque; A Miegeville; G Potel; J Caillon; N Asseray Journal: Int J Antimicrob Agents Date: 2010-09-18 Impact factor: 5.283
Authors: Pamela A Moise; Davida S Smyth; Nadia El-Fawal; D Ashley Robinson; Patricia N Holden; Alan Forrest; George Sakoulas Journal: J Antimicrob Chemother Date: 2007-11-27 Impact factor: 5.790
Authors: Kenneth V I Rolston; Weiqun Wang; Lior Nesher; Samuel A Shelburne; Randall A Prince Journal: J Antibiot (Tokyo) Date: 2015-12-02 Impact factor: 2.649
Authors: Kenneth V I Rolston; Dina Besece; Kenneth C Lamp; Min Yoon; Scott A McConnell; Pamela White Journal: Support Care Cancer Date: 2013-08-24 Impact factor: 3.603