Risk factors for recurrent hospital-acquired Clostridium difficile infection in a Japanese university hospital
Authors Hikone M, Ainoda Y, Tago S, Fujita T, Hirai Y, Takeuchi K, Totsuka K
Received 19 March 2015
Accepted for publication 11 May 2015
Published 14 July 2015 Volume 2015:8 Pages 191—196
Checked for plagiarism Yes
Review by Single-blind
Peer reviewer comments 3
Editor who approved publication: Professor Andreas M Kaiser
Mayu Hikone,1 Yusuke Ainoda,1,2 Sayaka Tago,2 Takahiro Fujita,2 Yuji Hirai,2 Kaori Takeuchi,2 Kyoichi Totsuka3
1Department of Infectious Diseases, Tokyo Metropolitan Bokutoh General Hospital, 2Department of Infectious Diseases, Tokyo Women's Medical University, 3Department of Internal Medicine, Kitatama Hospital, Tokyo, Japan
Background: Clostridium difficile infection (CDI) is a highly prevalent hospital-associated infection. Although most patients respond well to discontinuation of antibiotics, 20%–30% of patients relapse. To initiate early therapeutic measures, the risk factors for recurrent CDI must be identified, although very few Japanese studies have used standard surveillance definitions to identify these risk factors.
Methods: We retrospectively reviewed the medical records of patients with health care facility-onset CDI between August 2011 and September 2013. Patients with diarrhea who were positive for Clostridium difficile (via an enzyme immunoassay) were defined as having CDI. Clinical data (eg, demographics, comorbidities, medication, laboratory results, and clinical outcomes) were evaluated, and multivariate analysis was used to identify risk factors that were associated with recurrent CDI.
Results: Seventy-six health care facility-onset CDI cases were identified, with an incidence rate of 0.8 cases per 10,000 patient-days. Fourteen cases (18.4%) were recurrent, with 13 patients having experienced a single recurrent episode and one patient having experienced three recurrent episodes. The 30-day and 90-day mortality rates were 7.9% and 14.5%, respectively. Multivariate analysis revealed that recurrent patients were more likely to have underlying malignant disease (odds ratio: 7.98; 95% confidence interval: 1.22–52.2; P=0.03) and a history of intensive care unit hospitalization (odds ratio: 49.9; 95% confidence interval: 1.01–2,470; P=0.049).
Conclusion: Intensive care unit hospitalization and malignancy are risk factors for recurrent CDI. Patients with these factors should be carefully monitored for recurrence and provided with appropriate antimicrobial stewardship.
Keywords: Clostridium difficile, recurrent infection, risk factors
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