Risk Factors ForStenotrophomonas MaltophiliaBacteremia In Oncology Patients: A Case–Control Study

Author:

Apisarnthanarak Anucha,Mayfield Jennie L.,Garison Teresa,McLendon Patricia M.,DiPersio John F.,Fraser Victoria J.,Polish Louis B.

Abstract

AbstractObjective:To characterize risk factors forStenotrophomonas maltophiliabloodstream infection in oncology patients.Design:A 3:1 case–control study.Setting:Stem Cell Transplant and Leukemic Center at Barnes–Jewish Hospital (St. Louis), a 1,442-bed, tertiary-care teaching hospital with a 26-bed transplantation ward.Method:From June 1999 to April 2001,13 patients withS. maltophiliabacteremia were compared with 39 control-patients who were on the transplantation unit on the same day as the case-patients' positive blood cultures. Information collected included patient demographics, medical history, history of transplantation, transplantation type, graft versus host disease, neutropenia, antibiotic use, chemotherapy, mucositis, diarrhea, the presence of central venous catheter(s), cultures, and concomitant infections.Results:Significant risk factors forS. maltophiliabacteremia included severe mucositis (7 [53.8%] of 13 vs 8 [20.5%] of 39;P= .034), diarrhea (7 [53.8%] of 13 vs 8 [20%] of 39;P= .034), and the use of metronidazole (9 [69.2%] of 13 vs 8 [20.5%] of 39;P= .002). In addition, the number of antibiotics used (median, 9 vs 5;P< .001), duration of mucositis (median, 29 vs 15 days;P= .032), and length of hospital stay (median, 34 vs 22 days;P= .017) were significantly different between case- and control-patients. NineS. maltophiliaisolates tested by pulsed-field gel electrophoresis were found to be distinctly different.Conclusion:Interventions to ameliorate the severity of mucositis, reduce antibiotic pressure, prevent diarrhea, and promote meticulous central venous catheter care may help preventS. maltophiliabloodstream infection in oncology patients. The role of gastrointestinal tract colonization as a potential source ofS. maltophiliabacteremia in oncology patients deserves further investigation.

Publisher

Cambridge University Press (CUP)

Subject

Infectious Diseases,Microbiology (medical),Epidemiology

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