Nationwide surveillance of antimicrobial consumption and resistance to Pseudomonas aeruginosa isolates at 203 Japanese hospitals in 2010
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In Japan, a national surveillance study of antimicrobial consumption has never been undertaken. This study aimed to describe antimicrobial consumption and resistance to Pseudomonas aeruginosa in 203 Japanese hospitals, to identify targets for quality improvement.
We conducted an ecological study using retrospective data (2010). Antimicrobial consumption was collected in the World Health Organization (WHO) anatomical therapeutic chemical/defined daily dose (ATC/DDD) format. Rates of imipenem (IPM), meropenem (MEPM), ciprofloxacin (CPFX), or amikacin (AMK) resistance were expressed as the incidence of non-susceptible isolates. Additionally, hospitals were asked to provide data concerning hospital characteristics and infection control policies. Hospitals were classified according to functional categories of the Medical Services Act in Japan.
Data were collected from 203 Japanese hospitals (a total of 91,147 beds). The total antimicrobial consumption was 15.49 DDDs/100 bed-days (median), with consumptions for penicillins, carbapenems, quinolones, and glycopeptides being 4.27, 1.60, 0.41, and 0.49, respectively. The median incidences of IPM, MEPM, CPFX, and AMK resistance were 0.15, 0.10, 0.13, and 0.03 isolates per 1,000 patient-days, respectively. Antimicrobial notification and/or approval systems were present in 183 hospitals (90.1 %). In the multivariate analysis, the piperacillin/tazobactam, quinolones, and/or total consumptions and the advanced treatment hospitals showed a significant association with the incidence of P. aeruginosa resistant to IPM, MEPM, CPFX, and AMK [adjusted R 2 (aR 2) values of 0.23, 0.30, 0.22, and 0.35, respectively).
This is the first national surveillance study of antimicrobial consumption in Japan. A continuous surveillance program in Japan is necessary in order to evaluate the association among resistance, antimicrobial restriction, and consumption.
KeywordsSurveillance Japan Antimicrobial consumption Resistance Anatomical Therapeutic Chemical Defined daily dose
We are grateful to the hospitals that participated in the survey. We would like to express our sincere gratitude to Ryuya Horiuchi, president of the Japanese Society of Hospital Pharmacists, for providing us with this precious work opportunity. This study was supported by the Japanese Society of Hospital Pharmacists.
Conflict of interest
All authors report no conflicts of interest relevant to this article.
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