Antimicrobial use among paediatric inpatients at hospital sites within the Canadian Nosocomial Infection Surveillance Program, 2017/2018.

BACKGROUND: Antimicrobial resistance threatens the ability to successfully prevent and treat infections. While hospital benchmarks regarding antimicrobial use (AMU) have been well documented among adult populations, there is less information from among paediatric inpatients. This study presents benchmark rates of antimicrobial use (AMU) for paediatric inpatients in nine Canadian acute-care hospitals. METHODS: Acute-care hospitals participating in the Canadian Nosocomial Infection Surveillance Program submitted annual AMU data from paediatric inpatients from 2017 and 2018. All systemic antimicrobials were included. Data were available for neonatal intensive care units (NICUs), pediatric ICUs (PICUs), and non-ICU wards. Data were analyzed using days of therapy (DOT) per 1000 patient days (DOT/1000pd). RESULTS: Nine hospitals provided paediatric AMU data. Data from seven NICU and PICU wards were included. Overall AMU was 481 (95% CI 409-554) DOT/1000pd. There was high variability in AMU between hospitals. AMU was higher on PICU wards (784 DOT/1000pd) than on non-ICU (494 DOT/1000pd) or NICU wards (333 DOT/1000pd). On non-ICU wards, the antimicrobials with the highest use were cefazolin (66 DOT/1000pd), ceftriaxone (59 DOT/1000pd) and piperacillin-tazobactam (48 DOT/1000pd). On PICU wards, the antimicrobials with the highest use were ceftriaxone (115 DOT/1000pd), piperacillin-tazobactam (115 DOT/1000pd), and cefazolin (111 DOT/1000pd). On NICU wards, the antimicrobials with the highest use were ampicillin (102 DOT/1000pd), gentamicin/tobramycin (78 DOT/1000pd), and cefotaxime (38 DOT/1000pd). CONCLUSIONS: This study represents the largest collection of antimicrobial use data among hospitalized paediatric inpatients in Canada to date. In 2017/2018, overall AMU was 481 DOT/1000pd. National surveillance of AMU among paediatric inpatients is necessary for establishing benchmarks and informing antimicrobial stewardship efforts.

Assessment of antimicrobial prescribing practice, knowledge, and culture in three teaching hospitals.

BACKGROUND: Antimicrobial resistance (AR) is one of the most critical threats to global health. One of its root causes, misuse of antibiotics, can stem from prescribers' preconceived ideas, differing attitudes, and lack of knowledge. Canadian data on this subject are scarce. This study aimed to understand the culture and knowledge of antimicrobial prescribing to optimize strategies targeting prescribers in the local antimicrobial stewardship program (ASP). METHODS: An anonymous online survey was developed and distributed to antimicrobials prescribers at three acute-care teaching hospitals. The questionnaire surveyed perception of AR and ASPs. RESULTS: A total of 440 respondents completed the entire survey. All agreed that AR is a significant challenge in Canada. The vast majority (86%) of respondents believed that AR is a significant problem at their working hospital. However, only 36% of respondents believed that antibiotics are misused locally. Most (92%) agreed that ASPs can decrease AR. Several knowledge gaps were identified through clinical questions. For example, respondents failed to identify treatment indications for asymptomatic bacteriuria 15% of the time and 59% chose an unnecessarily broad antibiotic when presented a microbiology report with susceptibility results associated with a common clinical syndrome. Prescribers' self-reported confidence did not correlate with their knowledge score. CONCLUSIONS: Respondents recognized AR as a critical issue but awareness and knowledge on antibiotic misuse were lacking. As shown in previous studies, respondents see the threat of AR in a more theoretical way. This study provided a better understanding of antimicrobial prescribing practices and ways to optimize them within three teaching hospitals in Montréal. Barriers to optimal antimicrobial prescribing were identified and strategies for improving the effectiveness of the ASP will be developed accordingly.

HISTORIQUE: La résistance antimicrobienne (RA) est l'une des plus graves menaces qui pèsent sur la santé mondiale. L'une de ses causes profondes, le mésusage des antibiotiques, peut découler des idées préconçues, des divergences d'attitudes et du manque de connaissances des prescripteurs. Les données canadiennes sur le sujet sont rares. La présente étude visait à comprendre la culture et les connaissances sur la prescription d'antimicrobiens pour optimiser les stratégies auprès des prescripteurs dans le cadre du programme de gestion des antimicrobiens (PGA) local. MÉTHODOLOGIE: des chercheurs ont préparé un sondage anonyme en ligne et l'ont diffusé auprès des prescripteurs d'antimicrobiens de trois hôpitaux universitaires de soins aigus. Ils ont ainsi sondé la perception de la RA et du PGA. RÉSULTATS: Au total, 440 répondants ont rempli la totalité du sondage. Tous ont indiqué que la RA est un problème important au Canada. La grande majorité des répondants (86 %) étaient d'avis que la RA est un grave problème à l'hôpital où ils travaillent. Cependant, seulement 36 % d'entre eux pensaient que les antibiotiques étaient mal utilisés dans leur localité. La plupart (92 %) convenaient que le PGA peut réduire la RA. Les questions cliniques ont permis de relever plusieurs lacunes. Par exemple, dans 15 % des cas, les répondants n'étaient pas en mesure de déterminer les indications thérapeutiques de la bactériurie asymptomatique, 59 % ont choisi inutilement un antibiotique à large spectre après avoir parcouru un rapport de microbiologie dont les résultats de susceptibilité étaient associés à un syndrome clinique courant. La confiance que déclaraient les prescripteurs n'était pas corrélée avec leurs connaissances. CONCLUSIONS: Les répondants convenaient que la RA était un problème important, mais ne possédaient pas les connaissances nécessaires sur le mésusage des antibiotiques. Comme l'ont démontré des études antérieures, ils perçoivent la menace de la RA sous un angle plutôt théorique. La présente étude a permis de mieux comprendre les pratiques de prescription d'antibiotiques et de relever des moyens de les optimiser dans trois hôpitaux universitaires de Montréal. Les chercheurs ont relevé les obstacles à la prescription optimale d'antimicrobiens et mettront au point des stratégies pour améliorer l'efficacité du PGA en conséquence.

The 2018 Global Point Prevalence Survey of antimicrobial consumption and resistance in 47 Canadian hospitals: a cross-sectional survey.

BACKGROUND: Patient-level surveillance of antimicrobial use (AMU) in Canadian hospitals empowers the reduction of inappropriate AMU and was piloted in 2017 among 14 hospitals in Canada. We aimed to describe AMU on the basis of patient-level data in Canadian hospitals in 2018 in terms of antimicrobial prescribing prevalence and proportions, antimicrobial indications, and agent selection in medical, surgical and intensive care wards. METHODS: Canadian adult, pediatric and neonatal hospitals were invited to participate in the standardized web-based cross-sectional Global Point Prevalence Survey of Antimicrobial Consumption and Resistance (Global-PPS) conducted in 2018. An identified site administrator assigned all wards admitting inpatients to specific surveyors. A physician, pharmacist or nurse with infectious disease training performed the survey. The primary outcomes were point prevalence rates for AMU over the study period regarding prescriptions, indications and agent selection in medical, surgical and intensive care wards. The secondary outcomes were AMU for resistant organisms and practice appropriateness evaluated on the basis of quality indicators. Antimicrobial consumption is presented in terms of prevalence and proportions. RESULTS: Forty-seven of 118 (39.8%) hospitals participated in the survey; 9 hospitals were primary care centres, 15 were secondary care centres and 23 were tertiary or specialized care centres. Of 13 272 patients included, 33.5% (n = 4447) received a total of 6525 antimicrobials. Overall, 74.1% (4832/6525) of antimicrobials were for therapeutic use, 12.6% (n = 825) were for medical prophylaxis, 8.9% (n = 578) were for surgical prophylaxis, 2.2% (n = 143) were for other use and 2.3% (n = 147) were for unidentified reasons. A diagnosis or indication was documented in the patient's file at the initiation for 87.3% (n = 5699) of antimicrobials; 62.9% (n = 4106) of antimicrobials had a stop or review date; and 72.0% (n = 4697) of prescriptions were guided by local guidelines. INTERPRETATION: Overall, three-quarters of AMU was for therapeutic use across participating hospitals. Canadian hospitals should be further incentivized to create and adapt local guidelines on the basis of recent antimicrobial resistance data.

Antimicrobial use among adult inpatients at hospital sites within the Canadian Nosocomial Infection Surveillance Program: 2009 to 2016.

BACKGROUND: Antimicrobial resistance is a growing threat to the world's ability to prevent and treat infections. Links between quantitative antibiotic use and the emergence of bacterial resistance are well documented. This study presents benchmark antimicrobial use (AMU) rates for inpatient adult populations in acute-care hospitals across Canada. METHODS: In this retrospective surveillance study, acute-care adult hospitals participating in the Canadian Nosocomial Infection Surveillance Program (CNISP) submitted annual AMU data on all systemic antimicrobials from 2009 to 2016. Information specific to intensive care units (ICUs) and non-ICU wards were available for 2014-2016. Data were analyzed using defined daily doses (DDD) per 1000 patient days (DDD/1000pd). RESULTS: Between 2009 and 2016, 16-18 CNISP adult hospitals participated each year and provided their AMU data (22 hospitals participated in ≥1 year of surveillance; 11 in all years). From 2009 to 2016, there was a significant reduction in use (12%) (from 654 to 573 DDD/1000pd, p = 0.03). Fluoroquinolones accounted for the majority of this decrease (47% reduction in combined oral and intravenous use, from 129 to 68 DDD/1000pd, p < 0.002). The top five antimicrobials used in 2016 were cefazolin (78 DDD/1000pd), piperacillin-tazobactam (53 DDD/1000pd), ceftriaxone (49 DDD/1000pd), vancomycin (combined oral and intravenous use was 44 DDD/1000pd; 7% of vancomycin use was oral), and ciprofloxacin (combined oral and intravenous use: 42 DDD/1000pd). Among the top 10 antimicrobials used in 2016, ciprofloxacin and metronidazole use decreased significantly between 2009 and 2016 by 46% (p = 0.002) and 26% (p = 0.002) respectively. Ceftriaxone (85% increase, p = 0.0008) and oral amoxicillin-clavulanate (140% increase, p < 0.0001) use increased significantly but contributed only a small component (8.6 and 5.0%, respectively) of overall use. CONCLUSIONS: This study represents the largest collection of dispensed antimicrobial use data among inpatients in Canada to date. Between 2009 and 2016, there was a significant 12% decrease in AMU, driven primarily by a 47% decrease in fluoroquinolone use. Modest absolute increases in parenteral ceftriaxone and oral amoxicillin-clavulanate use were noted but contributed a small amount of total AMU. Ongoing national surveillance is crucial for establishing benchmarks and antimicrobial stewardship guidelines.