1
|
Allel K, Hernández-Leal MJ, Naylor NR, Undurraga EA, Abou Jaoude GJ, Bhandari P, Flanagan E, Haghparast-Bidgoli H, Pouwels KB, Yakob L. Costs-effectiveness and cost components of pharmaceutical and non-pharmaceutical interventions affecting antibiotic resistance outcomes in hospital patients: a systematic literature review. BMJ Glob Health 2024; 9:e013205. [PMID: 38423548 PMCID: PMC10910705 DOI: 10.1136/bmjgh-2023-013205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Accepted: 01/26/2024] [Indexed: 03/02/2024] Open
Abstract
INTRODUCTION Limited information on costs and the cost-effectiveness of hospital interventions to reduce antibiotic resistance (ABR) hinder efficient resource allocation. METHODS We conducted a systematic literature review for studies evaluating the costs and cost-effectiveness of pharmaceutical and non-pharmaceutical interventions aimed at reducing, monitoring and controlling ABR in patients. Articles published until 12 December 2023 were explored using EconLit, EMBASE and PubMed. We focused on critical or high-priority bacteria, as defined by the WHO, and intervention costs and incremental cost-effectiveness ratio (ICER). Following Preferred Reporting Items for Systematic review and Meta-Analysis guidelines, we extracted unit costs, ICERs and essential study information including country, intervention, bacteria-drug combination, discount rates, type of model and outcomes. Costs were reported in 2022 US dollars ($), adopting the healthcare system perspective. Country willingness-to-pay (WTP) thresholds from Woods et al 2016 guided cost-effectiveness assessments. We assessed the studies reporting checklist using Drummond's method. RESULTS Among 20 958 articles, 59 (32 pharmaceutical and 27 non-pharmaceutical interventions) met the inclusion criteria. Non-pharmaceutical interventions, such as hygiene measures, had unit costs as low as $1 per patient, contrasting with generally higher pharmaceutical intervention costs. Several studies found that linezolid-based treatments for methicillin-resistant Staphylococcus aureus were cost-effective compared with vancomycin (ICER up to $21 488 per treatment success, all 16 studies' ICERs CONCLUSION Robust information on ABR interventions is critical for efficient resource allocation. We highlight cost-effective strategies for mitigating ABR in hospitals, emphasising substantial knowledge gaps, especially in low-income and middle-income countries. Our study serves as a resource for guiding future cost-effectiveness study design and analyses.PROSPERO registration number CRD42020341827 and CRD42022340064.
Collapse
Affiliation(s)
- Kasim Allel
- Disease Control Department, London School of Hygiene & Tropical Medicine, London, UK
- Institute for Global Health, University College London, London, UK
- Department of Health and Community Sciences, University of Exeter, Exeter, UK
| | - María José Hernández-Leal
- Department of Community, Maternity and Paediatric Nursing, University of Navarra, Pamplona, Spain
- Millennium Nucleus on Sociomedicine, Santiago, Chile
| | - Nichola R Naylor
- Department of Health Services Research and Policy, London School of Hygiene & Tropical Medicine, London, UK
- HCAI, Fungal, AMR, AMU & Sepsis Division, UK Health Security Agency, London, UK
| | - Eduardo A Undurraga
- Escuela de Gobierno, Pontificia Universidad Catolica de Chile, Santiago, Chile
- CIFAR Azrieli Global Scholars program, Canadian Institute for Advanced Research, Toronto, Ontario, Canada
| | | | - Priyanka Bhandari
- Disease Control Department, London School of Hygiene & Tropical Medicine, London, UK
| | - Ellen Flanagan
- Disease Control Department, London School of Hygiene & Tropical Medicine, London, UK
| | | | - Koen B Pouwels
- Nuffield Department of Population Health, University of Oxford, Oxford, UK
- The National Institute for Health Research Health Protection Research Unit in Healthcare Associated Infections and Antimicrobial Resistance, University of Oxford, Oxford, UK
| | - Laith Yakob
- Disease Control Department, London School of Hygiene & Tropical Medicine, London, UK
| |
Collapse
|
2
|
Wang XT, Meng H, Pan DF, Zheng XY, Lu WW, Chen C, Su M, Su XY, Liu Z, Ma XJ, Liang PF. Multidrug-resistant organisms may be associated with bed allocation and utilization efficiency in healthcare institutions, based on national monitoring data from China (2014-2020). Sci Rep 2023; 13:22055. [PMID: 38087043 PMCID: PMC10716176 DOI: 10.1038/s41598-023-49548-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Accepted: 12/09/2023] [Indexed: 12/18/2023] Open
Abstract
Analyzing the influence of the bed allocation and utilization efficiency in healthcare institutions on the isolation proportion of Multidrug-resistant organisms (MDROs) to provide data to support prevention and control of MDROs. In this study, the provincial panel data from 2014 to 2020 in China on health resource indicators, including the number of beds per 1,000 population, hospital bed utilization rate, and average hospital stay from 2014 to 2020 in China were used to analyze the relationship between bed allocation or utilization efficiency and MDROs by the panel data quantile regression model. It was shown that the number of beds per 1,000 population had a negative effect on the isolation proportion of methicillin-resistant Staphylococcus aureus, vancomycin-resistant Enterococcus faecalis, vancomycin-resistant Enterococcus faecium, penicillin-resistant Streptococcus pneumoniae, methicillin-resistant coagulase-negative Staphylococcus, and cefotaxime or ceftriaxone resistant Escherichia coli (regression coefficient < 0, P < 0.05). The utilization rate of hospital bed had a positive effect on the isolation proportion of methicillin-resistant Staphylococcus aureus, methicillin-resistant coagulase-negative Staphylococcus, vancomycin-resistant Enterococcus faecium, penicillin-resistant Streptococcus pneumoniae, cefotaxime or ceftriaxone resistant Escherichia coli, carbapenem-resistant Escherichia coli, cefotaxime or ceftriaxone resistant Klebsiella pneumoniae, carbapenem-resistant Klebsiella pneumoniae, carbapenem-resistant Pseudomonas aeruginosa, and carbapenem-resistant Acinetobacter baumannii (regression coefficient > 0, P < 0.05). The average hospital stay had a positive effect on the isolation proportion for several antibiotic-resistant organisms, including methicillin-resistant Staphylococcus aureus, methicillin-resistant coagulase-negative Staphylococcus, vancomycin-resistant Enterococcus faecalis, vancomycin-resistant Enterococcus faecium, penicillin-resistant Streptococcus pneumoniae, cefotaxime or ceftriaxone resistant Escherichia coli, carbapenem-resistant Escherichia coli, quinolone-resistant Escherichia coli, cefotaxime or ceftriaxone resistant Klebsiella pneumoniae, carbapenem-resistant Pseudomonas aeruginosa, and carbapenem-resistant Acinetobacter baumannii (regression coefficient > 0, P < 0.05). Bed allocation and utilization efficiency in healthcare institutions may affect the isolation proportion of MDROs in varying degrees.
Collapse
Affiliation(s)
- Xing-Tian Wang
- Department of Medicine Statistics, People's Hospital of Ningxia Hui Autonomous Region, Yinchuan, 750002, Ningxia Hui Autonomous Region, China
| | - Hua Meng
- School of Public Health and Management, Ningxia Medical University, Yinchuan, 750004, Ningxia Hui Autonomous Region, China
| | - Dong-Feng Pan
- Department of Emergency Medicine, People's Hospital of Ningxia Hui Autonomous Region, Yinchuan, 750002, Ningxia Hui Autonomous Region, China
| | - Xiao-Yu Zheng
- Ningxia Chinese Medicine Research Center, Yinchuan, 750021, Ningxia Hui Autonomous Region, China
| | - Wen-Wen Lu
- School of Public Health and Management, Ningxia Medical University, Yinchuan, 750004, Ningxia Hui Autonomous Region, China
| | - Chen Chen
- Department of Medicine Statistics, People's Hospital of Ningxia Hui Autonomous Region, Yinchuan, 750002, Ningxia Hui Autonomous Region, China
| | - Ming Su
- Yinchuan Stomatology Hospital, Yinchuan, 750002, Ningxia Hui Autonomous Region, China
| | - Xin-Ya Su
- School of Public Health and Management, Ningxia Medical University, Yinchuan, 750004, Ningxia Hui Autonomous Region, China
| | - Zhuo Liu
- School of Public Health and Management, Ningxia Medical University, Yinchuan, 750004, Ningxia Hui Autonomous Region, China
| | - Xiao-Juan Ma
- School of Public Health and Management, Ningxia Medical University, Yinchuan, 750004, Ningxia Hui Autonomous Region, China
| | - Pei-Feng Liang
- Department of Medicine Statistics, People's Hospital of Ningxia Hui Autonomous Region, Yinchuan, 750002, Ningxia Hui Autonomous Region, China.
| |
Collapse
|
3
|
Ma T, Huang K, Cheng N. Recent Advances in Nanozyme-Mediated Strategies for Pathogen Detection and Control. Int J Mol Sci 2023; 24:13342. [PMID: 37686145 PMCID: PMC10487713 DOI: 10.3390/ijms241713342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Revised: 08/13/2023] [Accepted: 08/25/2023] [Indexed: 09/10/2023] Open
Abstract
Pathogen detection and control have long presented formidable challenges in the domains of medicine and public health. This review paper underscores the potential of nanozymes as emerging bio-mimetic enzymes that hold promise in effectively tackling these challenges. The key features and advantages of nanozymes are introduced, encompassing their comparable catalytic activity to natural enzymes, enhanced stability and reliability, cost effectiveness, and straightforward preparation methods. Subsequently, the paper delves into the detailed utilization of nanozymes for pathogen detection. This includes their application as biosensors, facilitating rapid and sensitive identification of diverse pathogens, including bacteria, viruses, and plasmodium. Furthermore, the paper explores strategies employing nanozymes for pathogen control, such as the regulation of reactive oxygen species (ROS), HOBr/Cl regulation, and clearance of extracellular DNA to impede pathogen growth and transmission. The review underscores the vast potential of nanozymes in pathogen detection and control through numerous specific examples and case studies. The authors highlight the efficiency, rapidity, and specificity of pathogen detection achieved with nanozymes, employing various strategies. They also demonstrate the feasibility of nanozymes in hindering pathogen growth and transmission. These innovative approaches employing nanozymes are projected to provide novel options for early disease diagnoses, treatment, and prevention. Through a comprehensive discourse on the characteristics and advantages of nanozymes, as well as diverse application approaches, this paper serves as a crucial reference and guide for further research and development in nanozyme technology. The expectation is that such advancements will significantly contribute to enhancing disease control measures and improving public health outcomes.
Collapse
Affiliation(s)
- Tianyi Ma
- Beijing Laboratory for Food Quality and Safety, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; (T.M.); (K.H.)
| | - Kunlun Huang
- Beijing Laboratory for Food Quality and Safety, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; (T.M.); (K.H.)
- Key Laboratory of Safety Assessment of Genetically Modified Organism (Food Safety), Ministry of Agriculture, Beijing 100083, China
| | - Nan Cheng
- Beijing Laboratory for Food Quality and Safety, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; (T.M.); (K.H.)
- Key Laboratory of Safety Assessment of Genetically Modified Organism (Food Safety), Ministry of Agriculture, Beijing 100083, China
| |
Collapse
|
4
|
Painter C, Faradiba D, Chavarina KK, Sari EN, Teerawattananon Y, Aluzaite K, Ananthakrishnan A. A systematic literature review of economic evaluation studies of interventions impacting antimicrobial resistance. Antimicrob Resist Infect Control 2023; 12:69. [PMID: 37443104 PMCID: PMC10339577 DOI: 10.1186/s13756-023-01265-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Accepted: 06/08/2023] [Indexed: 07/15/2023] Open
Abstract
BACKGROUND Antimicrobial resistance (AMR) is accelerated by widespread and inappropriate use of antimicrobials. Many countries, including those in low- and middle- income contexts, have started implementing interventions to tackle AMR. However, for many interventions there is little or no economic evidence with respect to their cost-effectiveness. To help better understand the scale of this evidence gap, we conducted a systematic literature review to provide a comprehensive summary on the value for money of different interventions affecting AMR. METHODS A systematic literature review was conducted of economic evaluations on interventions addressing AMR. a narrative synthesis of findings was produced. Systematic searches for relevant studies were performed across relevant databases and grey literature sources such as unpublished studies, reports, and other relevant documents. All identified economic evaluation studies were included provided that they reported an economic outcome and stated that the analysed intervention aimed to affect AMR or antimicrobial use in the abstract. Studies that reported clinical endpoints alone were excluded. Selection for final inclusion and data extraction was performed by two independent reviewers. A quality assessment of the evidence used in the included studies was also conducted. RESULTS 28,597 articles were screened and 35 articles were identified that satisfied the inclusion criteria. The review attempted to answer the following questions: (1) What interventions to address AMR have been the subject of an economic evaluation? (2) In what types of setting (e.g. high-income, low-income, regions etc.) have these economic evaluations been focused? (3) Which interventions have been estimated to be cost-effective, and has this result been replicated in other settings/contexts? (4) What economic evaluation methods or techniques have been used to evaluate these interventions? (5) What kind and quality of data has been used in conducting economic evaluations for these interventions? DISCUSSION The review is one of the first of its kind, and the most recent, to systematically review the literature on the cost-effectiveness of AMR interventions. This review addresses an important evidence gap in the economics of AMR and can assist AMR researchers' understanding of the state of the economic evaluation literature, and therefore inform future research. Systematic review registration PROSPERO (CRD42020190310).
Collapse
Affiliation(s)
- Chris Painter
- Health Intervention and Technology Assessment Program (HITAP), Ministry of Public Health, Nonthaburi, Thailand
- Saw Swee Hock School of Public Health, National University of Singapore, Singapore, Singapore
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | - Dian Faradiba
- Health Intervention and Technology Assessment Program (HITAP), Ministry of Public Health, Nonthaburi, Thailand.
| | - Kinanti Khansa Chavarina
- Health Intervention and Technology Assessment Program (HITAP), Ministry of Public Health, Nonthaburi, Thailand
| | - Ella Nanda Sari
- Health Intervention and Technology Assessment Program (HITAP), Ministry of Public Health, Nonthaburi, Thailand
| | - Yot Teerawattananon
- Health Intervention and Technology Assessment Program (HITAP), Ministry of Public Health, Nonthaburi, Thailand
- National University of Singapore, Singapore, Singapore
| | | | - Aparna Ananthakrishnan
- Health Intervention and Technology Assessment Program (HITAP), Ministry of Public Health, Nonthaburi, Thailand
| |
Collapse
|
5
|
Rice S, Carr K, Sobiesuo P, Shabaninejad H, Orozco-Leal G, Kontogiannis V, Marshall C, Pearson F, Moradi N, O'Connor N, Stoniute A, Richmond C, Craig D, Allegranzi B, Cassini A. Economic evaluations of interventions to prevent and control health-care-associated infections: a systematic review. THE LANCET. INFECTIOUS DISEASES 2023; 23:e228-e239. [PMID: 37001543 DOI: 10.1016/s1473-3099(22)00877-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Revised: 11/23/2022] [Accepted: 12/14/2022] [Indexed: 03/30/2023]
Abstract
Almost 9 million health-care-associated infections have been estimated to occur each year in European hospitals and long-term care facilities, and these lead to an increase in morbidity, mortality, bed occupancy, and duration of hospital stay. The aim of this systematic review was to review the cost-effectiveness of interventions to limit the spread of health-care-associated infections), framed by WHO infection prevention and control core components. The Embase, National Health Service Economic Evaluation Database, Database of Abstracts of Reviews of Effects, Health Technology Assessment, Cinahl, Scopus, Pediatric Economic Database Evaluation, and Global Index Medicus databases, plus grey literature were searched for studies between Jan 1, 2009, and Aug 10, 2022. Studies were included if they reported interventions including hand hygiene, personal protective equipment, national-level or facility-level infection prevention and control programmes, education and training programmes, environmental cleaning, and surveillance. The British Medical Journal checklist was used to assess the quality of economic evaluations. 67 studies were included in the review. 25 studies evaluated methicillin-resistant Staphylococcus aureus outcomes. 31 studies evaluated screening strategies. The assessed studies that met the minimum quality criteria consisted of economic models. There was some evidence that hand hygiene, environmental cleaning, surveillance, and multimodal interventions were cost-effective. There were few or no studies investigating education and training, personal protective equipment or monitoring, and evaluation of interventions. This Review provides a map of cost-effectiveness data, so that policy makers and researchers can identify the relevant data and then assess the quality and generalisability for their setting.
Collapse
Affiliation(s)
- Stephen Rice
- Population Health Sciences Institute, Newcastle University, Newcastle upon Tyne, UK.
| | - Katherine Carr
- Dental School, Newcastle University, Newcastle upon Tyne, UK
| | - Pauline Sobiesuo
- Population Health Sciences Institute, Newcastle University, Newcastle upon Tyne, UK
| | - Hosein Shabaninejad
- Population Health Sciences Institute, Newcastle University, Newcastle upon Tyne, UK
| | - Giovany Orozco-Leal
- Population Health Sciences Institute, Newcastle University, Newcastle upon Tyne, UK
| | | | - Christopher Marshall
- Population Health Sciences Institute, Newcastle University, Newcastle upon Tyne, UK; NIHR Innovation Observatory, Newcastle University, Newcastle upon Tyne, UK
| | - Fiona Pearson
- Population Health Sciences Institute, Newcastle University, Newcastle upon Tyne, UK; NIHR Innovation Observatory, Newcastle University, Newcastle upon Tyne, UK
| | - Najmeh Moradi
- Population Health Sciences Institute, Newcastle University, Newcastle upon Tyne, UK
| | - Nicole O'Connor
- Population Health Sciences Institute, Newcastle University, Newcastle upon Tyne, UK; NIHR Innovation Observatory, Newcastle University, Newcastle upon Tyne, UK
| | - Akvile Stoniute
- Population Health Sciences Institute, Newcastle University, Newcastle upon Tyne, UK
| | - Catherine Richmond
- NIHR Innovation Observatory, Newcastle University, Newcastle upon Tyne, UK
| | - Dawn Craig
- Population Health Sciences Institute, Newcastle University, Newcastle upon Tyne, UK; NIHR Innovation Observatory, Newcastle University, Newcastle upon Tyne, UK
| | - Benedetta Allegranzi
- Infection Prevention and Control Technical and Clinical Hub, Department of Integrated Health Services, WHO, Geneva, Switzerland
| | - Alessandro Cassini
- Infection Prevention and Control Technical and Clinical Hub, Department of Integrated Health Services, WHO, Geneva, Switzerland
| |
Collapse
|
6
|
MRSA carriage among healthcare workers in a Vietnamese intensive care unit: a prospective cohort study. Drug Target Insights 2022; 16:71-77. [PMID: 36636735 PMCID: PMC9808530 DOI: 10.33393/dti.2022.2504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Accepted: 12/19/2022] [Indexed: 12/24/2022] Open
Abstract
Background: Little is known about the magnitude and patterns of methicillin-resistant Staphylococcus aureus (MRSA) carriage among intensive care unit (ICU) healthcare workers (HCWs), especially in lower-middle-income countries like Vietnam. Materials and methods: A prospective cohort study was conducted on HCWs working in the adult ICU of the Hospital for Tropical Diseases in Vietnam between October 28 and December 20, 2019. These HCWs included physicians, nurses, and nursing assistants who were responsible for all essential medical activities and basic patient care. A questionnaire was used to collect participants’ information, including age, sex, profession, ICU working time, and underlying diseases. Hand and nasal swabs were collected weekly for 8 consecutive weeks for MRSA screening. Staphylococcal isolates were checked for catalase and coagulase and, for methicillin resistance using cefoxitin disk diffusion, then rechecked on the matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. Results: Among 55 HCWs, 16 (29.1%) carried MRSA in their noses or hands. MRSA intermittent hand carriage was documented in 2 (3.6%) HCWs. Among 53 HCWs undertaking nasal swabs, 13 (24.5%) were MRSA persistent and 3 (5.6%) were intermittent carriers. The MRSA carriage rate was highest among nursing assistants (50%, 4/8). More HCWs with underlying diseases were found to be MRSA carriers (31.8%, 7/22) compared with those without comorbidities (27.3%, 9/33). Conclusion: MRSA carriage among HCWs is not rare. The findings highlight an urgent need to review and update the local infection prevention and control measures to prevent MRSA transmission from HCWs to patients.
Collapse
|
7
|
Scott VJ. Evaluating the effectiveness of octenidine-containing wash mitts in reducing infections in intensive care. BRITISH JOURNAL OF NURSING (MARK ALLEN PUBLISHING) 2022; 31:838-843. [PMID: 36094030 DOI: 10.12968/bjon.2022.31.16.838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Patients in intensive care units (ICUs) are at a greater risk of developing hospital-acquired infections (HCAIs). Decontamination, which usually includes a regimen of body washing with an antimicrobial skin cleanser, is used to prevent HCAIs. Approaches can be: targeted, where carriers are identified and decontaminated; or universal, where all patients undergo a decontamination regimen. Universal rather than targeted decontamination is more effective at reducing infection rates and is more cost-effective. Decontamination in the ICU can lower HCAI rates across the entire hospital. Microbial resistance to chlorhexidine, however, which is the main active agent used for decontamination is increasing, and there are also adverse effects, leading to interest in octenidine as an alternative. This article explores the use of octenidine-containing single-use wash mitts in ICUs, which have been positively evaluated regarding antimicrobial activity, and ease and effectiveness of use.
Collapse
Affiliation(s)
- Vikki-Jo Scott
- Senior Lecturer, MA Learning and Teaching, School of Health and Social Care, University of Essex, Colchester
| |
Collapse
|
8
|
Laager M, Cooper BS, Eyre DW. Probabilistic modelling of effects of antibiotics and calendar time on transmission of healthcare-associated infection. Sci Rep 2021; 11:21417. [PMID: 34725404 PMCID: PMC8560804 DOI: 10.1038/s41598-021-00748-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Accepted: 10/18/2021] [Indexed: 12/17/2022] Open
Abstract
Healthcare-associated infection and antimicrobial resistance are major concerns. However, the extent to which antibiotic exposure affects transmission and detection of infections such as MRSA is unclear. Additionally, temporal trends are typically reported in terms of changes in incidence, rather than analysing underling transmission processes. We present a data-augmented Markov chain Monte Carlo approach for inferring changing transmission parameters over time, screening test sensitivity, and the effect of antibiotics on detection and transmission. We expand a basic model to allow use of typing information when inferring sources of infections. Using simulated data, we show that the algorithms are accurate, well-calibrated and able to identify antibiotic effects in sufficiently large datasets. We apply the models to study MRSA transmission in an intensive care unit in Oxford, UK with 7924 admissions over 10 years. We find that falls in MRSA incidence over time were associated with decreases in both the number of patients admitted to the ICU colonised with MRSA and in transmission rates. In our inference model, the data were not informative about the effect of antibiotics on risk of transmission or acquisition of MRSA, a consequence of the limited number of possible transmission events in the data. Our approach has potential to be applied to a range of healthcare-associated infections and settings and could be applied to study the impact of other potential risk factors for transmission. Evidence generated could be used to direct infection control interventions.
Collapse
Affiliation(s)
- Mirjam Laager
- Nuffield Department of Medicine, University of Oxford, Oxford, UK.
| | - Ben S Cooper
- Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | - David W Eyre
- Big Data Institute, Nuffield Department of Population Health, University of Oxford, Oxford, UK
| | | |
Collapse
|
9
|
Graves N, Mitchell BG, Otter JA, Kiernan M. The cost-effectiveness of temporary single-patient rooms to reduce risks of healthcare-associated infection. J Hosp Infect 2021; 116:21-28. [PMID: 34246721 DOI: 10.1016/j.jhin.2021.07.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 06/30/2021] [Accepted: 07/06/2021] [Indexed: 12/12/2022]
Abstract
BACKGROUND The use of single rooms for patient isolation often forms part of a wider bundle to prevent certain healthcare-associated infections (HAIs) in hospitals. Demand for single rooms often exceeds what is available and the use of temporary isolation rooms may help resolve this. Changes to infection prevention practice should be supported by evidence showing that cost-effectiveness is plausible and likely. AIM To perform a cost-effectiveness evaluation of adopting temporary single rooms into UK National Health Service (NHS) hospitals. METHODS The cost-effectiveness of a decision to adopt a temporary, single-patient, isolation room to the current infection prevention efforts of an NHS hospital was modelled. Primary outcomes are the expected change to total costs and life-years from an NHS perspective. FINDINGS The mean expected incremental cost per life-year gained (LYG) is £5,829. The probability that adoption is cost-effective against a £20,000 threshold per additional LYG is 93%, and for a £13,000 threshold the probability is 87%. The conclusions are robust to scenarios for key model parameters. If a temporary single-patient isolation room reduces risks of HAI by 16.5% then an adoption decision is more likely to be cost-effective than not. Our estimate of the effectiveness reflects guidelines and reasonable assumptions and the theoretical rationale is strong. CONCLUSION Despite uncertainties about the effectiveness of temporary isolation rooms for reducing risks of HAI, there is some evidence that an adoption decision is likely to be cost-effective for the NHS setting. Prospective studies will be useful to reduce this source of uncertainty.
Collapse
Affiliation(s)
- N Graves
- Health Services & Systems Research, Duke-NUS Medical School, Singapore.
| | - B G Mitchell
- School of Nursing and Midwifery, University of Newcastle, Ourimbah, NSW, Australia
| | - J A Otter
- National Institute for Healthcare Research Health Protection Research Unit (NIHR HPRU) in HCAI and AMR, Imperial College London & Public Health England, Hammersmith Hospital, London, UK
| | - M Kiernan
- Gama Healthcare Ltd, Hemel Hempstead, UK
| |
Collapse
|
10
|
Pouwels KB, Vansteelandt S, Batra R, Edgeworth J, Wordsworth S, Robotham JV. Estimating the Effect of Healthcare-Associated Infections on Excess Length of Hospital Stay Using Inverse Probability-Weighted Survival Curves. Clin Infect Dis 2020; 71:e415-e420. [PMID: 32047916 PMCID: PMC7713691 DOI: 10.1093/cid/ciaa136] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Accepted: 02/07/2020] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Studies estimating excess length of stay (LOS) attributable to nosocomial infections have failed to address time-varying confounding, likely leading to overestimation of their impact. We present a methodology based on inverse probability-weighted survival curves to address this limitation. METHODS A case study focusing on intensive care unit-acquired bacteremia using data from 2 general intensive care units (ICUs) from 2 London teaching hospitals were used to illustrate the methodology. The area under the curve of a conventional Kaplan-Meier curve applied to the observed data was compared with that of an inverse probability-weighted Kaplan-Meier curve applied after treating bacteremia as censoring events. Weights were based on the daily probability of acquiring bacteremia. The difference between the observed average LOS and the average LOS that would be observed if all bacteremia cases could be prevented was multiplied by the number of admitted patients to obtain the total excess LOS. RESULTS The estimated total number of extra ICU days caused by 666 bacteremia cases was estimated at 2453 (95% confidence interval [CI], 1803-3103) days. The excess number of days was overestimated when ignoring time-varying confounding (2845 [95% CI, 2276-3415]) or when completely ignoring confounding (2838 [95% CI, 2101-3575]). CONCLUSIONS ICU-acquired bacteremia was associated with a substantial excess LOS. Wider adoption of inverse probability-weighted survival curves or alternative techniques that address time-varying confounding could lead to better informed decision making around nosocomial infections and other time-dependent exposures.
Collapse
Affiliation(s)
- Koen B Pouwels
- Health Economics Research Centre, Nuffield Department of Population Health, University of Oxford, Oxford, United Kingdom
- National Institute for Health Research Health Protection Research Unit in Healthcare Associated Infections and Antimicrobial Resistance, University of Oxford, Oxford, United Kingdom
| | - Stijn Vansteelandt
- Department of Applied Mathematics, Computer Science and Statistics, Ghent University, Ghent, Belgium
- Department of Medical Statistics, London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Rahul Batra
- Centre for Clinical Infection and Diagnostics Research, Department of Infectious Diseases, King’s College London and Guy’s and St Thomas’ National Health Services Foundation Trust, London, United Kingdom
| | - Jonathan Edgeworth
- Centre for Clinical Infection and Diagnostics Research, Department of Infectious Diseases, King’s College London and Guy’s and St Thomas’ National Health Services Foundation Trust, London, United Kingdom
| | - Sarah Wordsworth
- Health Economics Research Centre, Nuffield Department of Population Health, University of Oxford, Oxford, United Kingdom
| | - Julie V Robotham
- Modelling and Economics Unit, National Infection Service, Public Health England, London, United Kingdom
| |
Collapse
|
11
|
Christie J, Wright D, Liebowitz J, Stefanacci P. Can a nasal and skin decolonization protocol safely replace contact precautions for MRSA-colonized patients? Am J Infect Control 2020; 48:922-924. [PMID: 31937456 DOI: 10.1016/j.ajic.2019.12.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 12/13/2019] [Accepted: 12/14/2019] [Indexed: 01/27/2023]
Abstract
Contact precautions (CP) are employed in United States hospitals in order to prevent transmission of pathogens via supplies, equipment, and health care worker hands. CP is required in many hospitals for both colonized and infected methicillin-resistant Staphylococcus aureus (MRSA) patients. The isolation of colonized patients often results in a high rate of CP, leading some hospitals to abandon CP for MRSA-colonized patients without adding any safety measure to address transmission risk. Understanding this risk, 7 network hospitals in a US health care system made the decision to replace CP for high-risk MRSA-colonized patients with targeted nasal and body decolonization, leading to significant cost savings and staff satisfaction without any increase in MRSA transmission.
Collapse
Affiliation(s)
- Jacqueline Christie
- Departments of Quality and Nursing, Universal Health Services, Inc., King of Prussia, PA.
| | - Don Wright
- Departments of Quality and Nursing, Universal Health Services, Inc., King of Prussia, PA
| | - Jacalyn Liebowitz
- Departments of Quality and Nursing, Universal Health Services, Inc., King of Prussia, PA
| | - Paul Stefanacci
- Departments of Quality and Nursing, Universal Health Services, Inc., King of Prussia, PA
| |
Collapse
|
12
|
Nguyen LKN, Megiddo I, Howick S. Simulation models for transmission of health care-associated infection: A systematic review. Am J Infect Control 2020; 48:810-821. [PMID: 31862167 PMCID: PMC7161411 DOI: 10.1016/j.ajic.2019.11.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 11/01/2019] [Accepted: 11/03/2019] [Indexed: 01/08/2023]
Abstract
BACKGROUND Health care-associated infections (HAIs) are a global health burden because of their significant impact on patient health and health care systems. Mechanistic simulation modeling that captures the dynamics between patients, pathogens, and the environment is increasingly being used to improve understanding of epidemiological patterns of HAIs and to facilitate decisions on infection prevention and control (IPC). The purpose of this review is to present a systematic review to establish (1) how simulation models have been used to investigate HAIs and their mitigation and (2) how these models have evolved over time, as well as identify (3) gaps in their adoption and (4) useful directions for their future development. METHODS The review involved a systematic search and identification of studies using system dynamics, discrete event simulation, and agent-based model to study HAIs. RESULTS The complexity of simulation models developed for HAIs significantly increased but heavily concentrated on transmission dynamics of methicillin-resistant Staphylococcus aureus in the hospitals of high-income countries. Neither HAIs in other health care settings, the influence of contact networks within a health care facility, nor patient sharing and referring networks across health care settings were sufficiently understood. CONCLUSIONS This systematic review provides a broader overview of existing simulation models in HAIs to identify the gaps and to direct and facilitate further development of appropriate models in this emerging field.
Collapse
|
13
|
Abstract
OBJECTIVES Cost-effectiveness analyses are increasingly used to aid decisions about resource allocation in healthcare; this practice is slow to translate into critical care. We sought to identify and summarize original cost-effectiveness studies presenting cost per quality-adjusted life year, incremental cost-effectiveness ratios, or cost per life-year ratios for treatments used in ICUs. DESIGN We conducted a systematic search of the English-language literature for cost-effectiveness analyses published from 1993 to 2018 in critical care. Study quality was assessed using the Drummond checklist. SETTING Critical care units. PATIENTS OR SUBJECTS Critical care patients. INTERVENTIONS Identified studies with cost-effectiveness analyses. MEASUREMENTS AND MAIN RESULTS We identified 97 studies published through 2018 with 156 cost-effectiveness ratios. Reported incremental cost-effectiveness ratios ranged from -$119,635 (hypothetical cohort of patients requiring either intermittent or continuous renal replacement therapy) to $876,539 (data from an acute renal failure study in which continuous renal replacement therapy was the most expensive therapy). Many studies reported favorable cost-effectiveness profiles (i.e., below $50,000 per life year or quality-adjusted life year). However, several therapies have since been proven harmful. Over 2 decades, relatively few cost-effectiveness studies in critical care have been published (average 4.6 studies per year). There has been a more recent trend toward using hypothetical cohorts and modeling scenarios without proven clinical data (2014-2018: 19/33 [58%]). CONCLUSIONS Despite critical care being a significant healthcare cost burden there remains a paucity of studies in the literature evaluating its cost effectiveness.
Collapse
|
14
|
Gill AAS, Singh S, Thapliyal N, Karpoormath R. Nanomaterial-based optical and electrochemical techniques for detection of methicillin-resistant Staphylococcus aureus: a review. Mikrochim Acta 2019; 186:114. [PMID: 30648216 DOI: 10.1007/s00604-018-3186-7] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Accepted: 12/14/2018] [Indexed: 12/15/2022]
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) is responsible for a number of life-threatening complications in humans. Mutations in the genetic sequence of S. aureus due to the presence of certain genes results in resistance against β-lactamases. Thus, there is an urgent need for developing highly sensitive techniques for the early detection of MRSA to counter the rise in resistant strains. This review (142 refs.) extensively covers literature reports on nanomaterial-based optical and electrochemical sensors from the year 1983 to date, with particularly emphasis on recent advances in electrochemical sensing (such as voltammetry and impedimetric) and optical sensing (such as colorimetry and fluorometry) techniques. Among the electrochemical methods, various nanomaterials were employed for the modification of electrodes. Whereas, in optical assays, formats such as enzyme linked immunosorbent assay, lateral flow assays or in optical fiber systems are common. In addition, novel sensing platforms are reported by applying advanced nanomaterials which include gold nanoparticles, nanotitania, graphene, graphene-oxide, cadmium telluride and related quantum dots, nanocomposites, upconversion nanoparticles and bacteriophages. Finally, closing remarks and an outlook conclude the review. Graphical abstract Schematic of the diversity of nanomaterial-based methods for detection of methicillin-resistant Staphylococcus aureus (MRSA). AuNPs: gold nanoparticles; QDs: quantum dots; PVL: Panton-Valentine leukocidin; mecA gene: mec-gene complex encoding methicillin resistance.
Collapse
Affiliation(s)
- Atal A S Gill
- Department of Pharmaceutical Chemistry, College of Health Sciences, University of KwaZulu-Natal, Durban, 4000, South Africa
| | - Sima Singh
- Department of Pharmaceutical Chemistry, College of Health Sciences, University of KwaZulu-Natal, Durban, 4000, South Africa
| | - Neeta Thapliyal
- Department of Applied Science, Women Institute of Technology, Sudhowala, Dehradun, Uttarakhand, 248007, India
| | - Rajshekhar Karpoormath
- Department of Pharmaceutical Chemistry, College of Health Sciences, University of KwaZulu-Natal, Durban, 4000, South Africa.
| |
Collapse
|
15
|
Garvey MI, Wilkinson MAC, Bradley CW, Holden KL, Holden E. Wiping out MRSA: effect of introducing a universal disinfection wipe in a large UK teaching hospital. Antimicrob Resist Infect Control 2018; 7:155. [PMID: 30574298 PMCID: PMC6299988 DOI: 10.1186/s13756-018-0445-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Accepted: 12/03/2018] [Indexed: 11/23/2022] Open
Abstract
Background Contamination of the inanimate environment around patients constitutes an important reservoir of MRSA. Here we describe the effect of introducing a universal disinfection wipe in all wards on the rates of MRSA acquisitions and bacteraemias across a large UK teaching hospital. Methods A segmented Poisson regression model was used to detect any significant changes in the monthly numbers per 100,000 bed days of MRSA acquisitions and bacteraemias from April 2013 - December 2017 across QEHB. Results From April 2013 to April 2016, cleaning of ward areas and multi-use patient equipment by nursing staff consisted of a two-wipe system. Firstly, a detergent wipe was used, which was followed by a disinfection step using an alcohol wipe. In May 2016, QEHB discontinued the use of a two-wipe system for cleaning and changed to a one wipe system utilising a combined cleaning and disinfection wipe containing a quaternary ammonium compound. The segmented Poisson regression model demonstrated that the rate of MRSA acquisition/100,000 patient bed days was affected by the introduction of the new wiping regime (20.7 to 9.4 per 100,000 patient bed days; p <0.005). Discussion Using a Poisson model we demonstrated that the average hospital acquisition rate of MRSA/100,000 patient bed days reduced by 6.3% per month after the introduction of the new universal wipe. Conclusion We suggest that using a simple one wipe system for nurse cleaning is an effective strategy to reduce the spread and incidence of healthcare associated MRSA.
Collapse
Affiliation(s)
- Mark I. Garvey
- University Hospitals Birmingham NHS Foundation Trust, Queen Elizabeth Hospital Birmingham, Edgbaston, Birmingham, B15 2WB England
- Institute of Microbiology and Infection, The University of Birmingham, Edgbaston, Birmingham, England
| | - Martyn A. C. Wilkinson
- University Hospitals Birmingham NHS Foundation Trust, Queen Elizabeth Hospital Birmingham, Edgbaston, Birmingham, B15 2WB England
| | - Craig W. Bradley
- Gloucestershire Hospital’s NHS Foundation Trust, Gloucester Royal Hospital, Great Western Road, Gloucester, GL1 3NN England
| | - Kerry L. Holden
- Gloucestershire Hospital’s NHS Foundation Trust, Gloucester Royal Hospital, Great Western Road, Gloucester, GL1 3NN England
| | - Elisabeth Holden
- University Hospitals Birmingham NHS Foundation Trust, Queen Elizabeth Hospital Birmingham, Edgbaston, Birmingham, B15 2WB England
| |
Collapse
|
16
|
Halloran ME, Auranen K, Baird S, Basta NE, Bellan SE, Brookmeyer R, Cooper BS, DeGruttola V, Hughes JP, Lessler J, Lofgren ET, Longini IM, Onnela JP, Özler B, Seage GR, Smith TA, Vespignani A, Vynnycky E, Lipsitch M. Simulations for designing and interpreting intervention trials in infectious diseases. BMC Med 2017; 15:223. [PMID: 29287587 PMCID: PMC5747936 DOI: 10.1186/s12916-017-0985-3] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Accepted: 12/05/2017] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Interventions in infectious diseases can have both direct effects on individuals who receive the intervention as well as indirect effects in the population. In addition, intervention combinations can have complex interactions at the population level, which are often difficult to adequately assess with standard study designs and analytical methods. DISCUSSION Herein, we urge the adoption of a new paradigm for the design and interpretation of intervention trials in infectious diseases, particularly with regard to emerging infectious diseases, one that more accurately reflects the dynamics of the transmission process. In an increasingly complex world, simulations can explicitly represent transmission dynamics, which are critical for proper trial design and interpretation. Certain ethical aspects of a trial can also be quantified using simulations. Further, after a trial has been conducted, simulations can be used to explore the possible explanations for the observed effects. CONCLUSION Much is to be gained through a multidisciplinary approach that builds collaborations among experts in infectious disease dynamics, epidemiology, statistical science, economics, simulation methods, and the conduct of clinical trials.
Collapse
Affiliation(s)
- M Elizabeth Halloran
- Vaccine and Infectious Disease Division, Fred Hutchinson Research Center, 1100 Fairview Ave N, Seattle, WA, 98109, USA.
- Department of Biostatistics, School of Public Health, University of Washington, Seattle, WA, USA.
| | - Kari Auranen
- Department of Mathematics and Statistics, University of Turku, Turku, Finland
| | - Sarah Baird
- Department of Global Health, Milken Institute School of Public Health, The George Washington University, Washington DC, USA
| | - Nicole E Basta
- Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, Minneapolis, MN, USA
| | - Steven E Bellan
- Department of Epidemiology and Biostatistics, College of Public Health, University of Georgia, Athens, GA, USA
| | - Ron Brookmeyer
- Department of Biostatistics, The Fielding School of Public Health, UCLA, Los Angeles, CA, USA
| | - Ben S Cooper
- Mahidol Oxford Tropical Medicine Research Unit, Bangkok, Thailand
| | - Victor DeGruttola
- Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - James P Hughes
- Department of Biostatistics, School of Public Health, University of Washington, Seattle, WA, USA
| | - Justin Lessler
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Eric T Lofgren
- Paul G. Allen School for Global Animal Health, Washington State University, Pullman, WA, USA
| | - Ira M Longini
- Department of Biostatistics, University of Florida, Gainesville, FL, USA
| | - Jukka-Pekka Onnela
- Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Berk Özler
- Development Research Group, The World Bank, Washington DC, USA
| | - George R Seage
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Thomas A Smith
- Department of Epidemiology and Public Health, Swiss Tropical & Public Health Institute, Basel, Switzerland
- University of Basel, Basel, Switzerland
| | | | - Emilia Vynnycky
- Modelling and Economics Unit, Public Health England, Colindale, UK
- TB Modelling Group, Centre for Mathematical Modelling of Infectious Diseases, TB Centre and Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, UK
| | - Marc Lipsitch
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| |
Collapse
|
17
|
Nelson RE, Deka R, Khader K, Stevens VW, Schweizer ML, Rubin MA. Dynamic transmission models for economic analysis applied to health care-associated infections: A review of the literature. Am J Infect Control 2017; 45:1382-1387. [PMID: 28958442 DOI: 10.1016/j.ajic.2017.02.035] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2017] [Revised: 02/23/2017] [Accepted: 02/24/2017] [Indexed: 11/30/2022]
Abstract
BACKGROUND Cost-effectiveness analyses are an important methodology in assessing whether a health care technology is suitable for widespread adoption. Common models used by economists, such as decision trees and Markov models, are appropriate for noninfectious diseases where treatment and exposure are independent. Diseases whose treatment and exposure are dependent require dynamic models to incorporate the nonlinear transmission effect. Two different types of models are often used for dynamic cost-effectiveness analyses: compartmental models and individual models. In this methodology-focused literature review, we describe each model type and summarize the literature associated with each using the example of health care-associated infections (HAIs). METHODS We conducted a review of the literature to identify dynamic cost-effectiveness analyses that examined interventions to prevent or treat HAIs. To be included in the review, studies needed to have each of 3 necessary components: involve economics, such as cost-effectiveness analysis and evidence of economic theory, use a dynamic transmission model, and examine HAIs. RESULTS Of the 9 articles published between 2005 and 2016 that met criteria to be included in our study, 3 used compartmental models and 6 used individual models. CONCLUSIONS Very few published studies exist that use dynamic transmission models to conduct economic analyses related to HAIs and even fewer studies have used these models to perform cost-effectiveness analyses.
Collapse
Affiliation(s)
- Richard E Nelson
- Veterans Affairs Salt Lake City Health Care System, IDEAS Center, Salt Lake City, UT; Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City, UT.
| | - Rishi Deka
- Veterans Affairs Salt Lake City Health Care System, IDEAS Center, Salt Lake City, UT; Department of Pharmacotherapy, University of Utah College of Pharmacy, Salt Lake City, UT
| | - Karim Khader
- Veterans Affairs Salt Lake City Health Care System, IDEAS Center, Salt Lake City, UT; Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City, UT
| | - Vanessa W Stevens
- Veterans Affairs Salt Lake City Health Care System, IDEAS Center, Salt Lake City, UT; Department of Pharmacotherapy, University of Utah College of Pharmacy, Salt Lake City, UT
| | - Marin L Schweizer
- Iowa City Veterans Affairs Health Care System, Iowa City, IA; Department of Internal Medicine, University of Iowa Carver College of Medicine, Iowa City, IA
| | - Michael A Rubin
- Veterans Affairs Salt Lake City Health Care System, IDEAS Center, Salt Lake City, UT; Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City, UT
| |
Collapse
|
18
|
Kardaś-Słoma L, Lucet JC, Perozziello A, Pelat C, Birgand G, Ruppé E, Boëlle PY, Andremont A, Yazdanpanah Y. Universal or targeted approach to prevent the transmission of extended-spectrum beta-lactamase-producing Enterobacteriaceae in intensive care units: a cost-effectiveness analysis. BMJ Open 2017; 7:e017402. [PMID: 29102989 PMCID: PMC5722099 DOI: 10.1136/bmjopen-2017-017402] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
OBJECTIVE Several control strategies have been used to limit the transmission of multidrug-resistant organisms in hospitals. However, their implementation is expensive and effectiveness of interventions for the control of extended-spectrum beta-lactamase-producing Enterobacteriaceae (ESBL-PE) spread is controversial. Here, we aim to assess the cost-effectiveness of hospital-based strategies to prevent ESBL-PE transmission and infections. DESIGN Cost-effectiveness analysis based on dynamic, stochastic transmission model over a 1-year time horizon. PATIENTS AND SETTING Patients hospitalised in a hypothetical 10-bed intensive care unit (ICU) in a high-income country. INTERVENTIONS Base case scenario compared with (1) universal strategies (eg, improvement of hand hygiene (HH) among healthcare workers, antibiotic stewardship), (2) targeted strategies (eg, screening of patient for ESBL-PE at ICU admission and contact precautions or cohorting of carriers) and (3) mixed strategies (eg, targeted approaches combined with antibiotic stewardship). MAIN OUTCOMES AND MEASURES Cases of ESBL-PE transmission, infections, cost of intervention, cost of infections, incremental cost per infection avoided. RESULTS In the base case scenario, 15 transmissions and five infections due to ESBL-PE occurred per 100 ICU admissions, representing a mean cost of €94 792. All control strategies improved health outcomes and reduced costs associated with ESBL-PE infections. The overall costs (cost of intervention and infections) were the lowest for HH compliance improvement from 55%/60% before/after contact with a patient to 80%/80%. CONCLUSIONS Improved compliance with HH was the most cost-saving strategy to prevent the transmission of ESBL-PE. Antibiotic stewardship was not cost-effective. However, adding antibiotic restriction strategy to HH or screening and cohorting strategies slightly improved their effectiveness and may be worthy of consideration by decision-makers.
Collapse
Affiliation(s)
- Lidia Kardaś-Słoma
- IAME, UMR 1137, INSERM, Paris, France
- University of Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Jean-Christophe Lucet
- IAME, UMR 1137, INSERM, Paris, France
- University of Paris Diderot, Sorbonne Paris Cité, Paris, France
- Infection Control Unit, Bichat-Claude Bernard Hospital, AP-HP, Paris, France
| | - Anne Perozziello
- IAME, UMR 1137, INSERM, Paris, France
- University of Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Camille Pelat
- IAME, UMR 1137, INSERM, Paris, France
- University of Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Gabriel Birgand
- IAME, UMR 1137, INSERM, Paris, France
- University of Paris Diderot, Sorbonne Paris Cité, Paris, France
- Infection Control Unit, Bichat-Claude Bernard Hospital, AP-HP, Paris, France
| | - Etienne Ruppé
- Bacteriology Laboratory, Bichat-Claude Bernard Hospital, AP-HP, Paris, France
| | - Pierre-Yves Boëlle
- Pierre Louis Institute of Epidemiology and Public Health (IPLESPUMRS 1136), INSERM, UPMC University Paris 06, Sorbonne University, Paris, France
| | - Antoine Andremont
- Bacteriology Laboratory, Bichat-Claude Bernard Hospital, AP-HP, Paris, France
| | - Yazdan Yazdanpanah
- IAME, UMR 1137, INSERM, Paris, France
- University of Paris Diderot, Sorbonne Paris Cité, Paris, France
- Infectious and Tropical Diseases Department, Bichat-Claude Bernard Hospital, AP-HP, Paris, France
| |
Collapse
|
19
|
Whittington MD, Curtis DJ, Atherly AJ, Bradley CJ, Lindrooth RC, Campbell JD. Screening test recommendations for methicillin-resistant Staphylococcus aureus surveillance practices: A cost-minimization analysis. Am J Infect Control 2017; 45:704-708. [PMID: 28126259 DOI: 10.1016/j.ajic.2016.12.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Revised: 12/18/2016] [Accepted: 12/19/2016] [Indexed: 11/18/2022]
Abstract
BACKGROUND To mitigate methicillin-resistant Staphylococcus aureus (MRSA) infections, intensive care units (ICUs) conduct surveillance through screening patients upon admission followed by adhering to isolation precautions. Two surveillance approaches commonly implemented are universal preemptive isolation and targeted isolation of only MRSA-positive patients. METHODS Decision analysis was used to calculate the total cost of universal preemptive isolation and targeted isolation. The screening test used as part of the surveillance practice was varied to identify which screening test minimized inappropriate and total costs. A probabilistic sensitivity analysis was conducted to evaluate the range of total costs resulting from variation in inputs. RESULTS The total cost of the universal preemptive isolation surveillance practice was minimized when a polymerase chain reaction screening test was used ($82.51 per patient). Costs were $207.60 more per patient when a conventional culture was used due to the longer turnaround time and thus higher isolation costs. The total cost of the targeted isolation surveillance practice was minimized when chromogenic agar 24-hour testing was used ($8.54 per patient). Costs were $22.41 more per patient when polymerase chain reaction was used. CONCLUSIONS For ICUs that preemptively isolate all patients, the use of a polymerase chain reaction screening test is recommended because it can minimize total costs by reducing inappropriate isolation costs. For ICUs that only isolate MRSA-positive patients, the use of chromogenic agar 24-hour testing is recommended to minimize total costs.
Collapse
Affiliation(s)
- Melanie D Whittington
- Department of Health Systems, Management, and Policy, University of Colorado Anschutz Medical Campus, Aurora, CO; Department of Clinical Pharmacy, University of Colorado Anschutz Medical Campus, Aurora, CO.
| | | | - Adam J Atherly
- Department of Health Systems, Management, and Policy, University of Colorado Anschutz Medical Campus, Aurora, CO
| | - Cathy J Bradley
- Department of Health Systems, Management, and Policy, University of Colorado Anschutz Medical Campus, Aurora, CO; University of Colorado Cancer Center, University of Colorado Anschutz Medical Campus, Aurora, CO
| | - Richard C Lindrooth
- Department of Health Systems, Management, and Policy, University of Colorado Anschutz Medical Campus, Aurora, CO
| | - Jonathan D Campbell
- Department of Clinical Pharmacy, University of Colorado Anschutz Medical Campus, Aurora, CO
| |
Collapse
|
20
|
Hulme J. Recent advances in the detection of methicillin resistant Staphylococcus aureus (MRSA). BIOCHIP JOURNAL 2017. [DOI: 10.1007/s13206-016-1201-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
|
21
|
Garvey MI, Bradley CW, Holden KL, Oppenheim B. Outbreak of clonal complex 22 Panton-Valentine leucocidin-positive methicillin-resistant Staphylococcus aureus. J Infect Prev 2017; 18:224-230. [PMID: 29317899 DOI: 10.1177/1757177417695647] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Accepted: 02/05/2017] [Indexed: 11/16/2022] Open
Abstract
Aims We describe the investigation and control of a nosocomial outbreak of Sequence Type (ST) 22 MRSA containing the Panton-Valentine leucocidin (PVL) toxin in an acute multispecialty surgical ward at University Hospital Birmingham NHS Foundation Trust. Methods A patient was classed as acquiring methicillin-resistant Staphylococcus aureus (MRSA) if they had a negative admission screen and then had MRSA isolated from a subsequent screen or clinical specimen. Spa typing and pulsed field gel electrophoresis (PFGE) was undertaken to confirm MRSA acquisitions. Findings The Infection Prevention and Control Team were alerted to the possibility of an outbreak when two patients acquired MRSA while being on the same ward. In total, five patients were involved in the outbreak where four patients acquired the PVL-MRSA clone from an index patient due to inadequate infection control practice. Two patients who acquired the strain developed a bloodstream infection. Infection control measures included decolonisation of affected patients, screening of all patients on the ward, environmental sampling and enhanced cleaning. Discussion Our study highlights the potential risk of spread and pathogenicity of this clone in the healthcare setting. Spa typing and PFGE assisted with confirmation of the outbreak and implementation of infection control measures. In outbreaks, microbiological typing should be undertaken as a matter of course as without specialist typing identification of the described outbreak would have been delayed.
Collapse
Affiliation(s)
- Mark I Garvey
- University Hospitals Birmingham NHS Foundation Trust, Queen Elizabeth Hospital Birmingham, Edgbaston, Birmingham UK
| | - Craig W Bradley
- University Hospitals Birmingham NHS Foundation Trust, Queen Elizabeth Hospital Birmingham, Edgbaston, Birmingham UK
| | - Kerry L Holden
- University Hospitals Birmingham NHS Foundation Trust, Queen Elizabeth Hospital Birmingham, Edgbaston, Birmingham UK
| | - Beryl Oppenheim
- University Hospitals Birmingham NHS Foundation Trust, Queen Elizabeth Hospital Birmingham, Edgbaston, Birmingham UK
| |
Collapse
|
22
|
The Effect of Universal Decolonization With Screening in Critical Care to Reduce MRSA Across an Entire Hospital. Infect Control Hosp Epidemiol 2017; 38:430-435. [PMID: 28162098 DOI: 10.1017/ice.2017.4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To describe the effect of universal methicillin-resistant Staphylococcus aureus (MRSA) decolonization therapy in a large intensive care unit (ICU) on the rates of MRSA cases and acquisitions in a UK hospital. DESIGN Descriptive study. SETTING University Hospitals Birmingham (UHB) NHS Foundation Trust is a tertiary referral teaching hospital in Birmingham, United Kingdom, that provides clinical services to nearly 1 million patients every year. METHODS A break-point time series analysis and kernel regression models were used to detect significant changes in the cumulative monthly numbers of MRSA bacteremia cases and acquisitions from April 2013 to August 2016 across the UHB system. RESULTS Prior to 2014, all ICU patients at UHB received universal MRSA decolonization therapy. In August 2014, UHB discontinued the use of universal decolonization due to published reports in the United Kingdom detailing the limited usefulness and cost-effectiveness of such an intervention. Break-point time series analysis of MRSA acquisition and bacteremia data indicated that break points were associated with the discontinuation and subsequent reintroduction of universal decolonization. Kernel regression models indicated a significant increase (P<.001) in MRSA acquisitions and bacteremia cases across UHB during the period without universal decolonization. CONCLUSION We suggest that routine decolonization for MRSA in a large ICU setting is an effective strategy to reduce the spread and incidence of MRSA across the whole hospital. Infect Control Hosp Epidemiol 2017;38:430-435.
Collapse
|
23
|
Bonten MJ. Controlling Transmission of Antibiotic-Resistant Bacteria in ICU Settings. Infect Dis (Lond) 2017. [DOI: 10.1016/b978-0-7020-6285-8.00077-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
|
24
|
A stochastic model for MRSA transmission within a hospital ward incorporating environmental contamination. Epidemiol Infect 2016; 145:825-838. [DOI: 10.1017/s0950268816002880] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
SUMMARYMethicillin-resistant Staphylococcus aureus (MRSA) transmission in hospital wards is associated with adverse outcomes for patients and increased costs for hospitals. The transmission process is inherently stochastic and the randomness emphasized by the small population sizes involved. As such, a stochastic model was proposed to describe the MRSA transmission process, taking into account the related contribution and modelling of the associated microbiological environmental contamination. The model was used to evaluate the performance of five common interventions and their combinations on six potential outcome measures of interest under two hypothetical disease burden settings. The model showed that the optimal intervention combination varied depending on the outcome measure and burden setting. In particular, it was found that certain outcomes only required a small subset of targeted interventions to control the outcome measure, while other outcomes still reported reduction in the outcome distribution with up to all five interventions included. This study describes a new stochastic model for MRSA transmission within a ward and highlights the use of the generalized Mann–Whitney statistic to compare the distribution of the outcome measures under different intervention combinations to assist in planning future interventions in hospital wards under different potential outcome measures and disease burden.
Collapse
|
25
|
Garvey MI, Winfield J, Wiley C, Reid M, Cooper M. Reduction in methicillin-resistant Staphylococcus aureus colonisation: impact of a screening and decolonisation programme. J Infect Prev 2016; 17:294-297. [PMID: 28989493 DOI: 10.1177/1757177416661406] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Accepted: 06/26/2016] [Indexed: 02/06/2023] Open
Abstract
Patients in care homes are often at 'high risk' of being methicillin-resistant Staphylococcus aureus (MRSA) colonised. Here we report the prevalence of MRSA, the effect of MRSA screening and decolonisation in Wolverhampton care-home residents. Eighty-two care homes (1665 residents) were screened for MRSA, three times at 6-monthly intervals (referred to as phases one, two and three). Screening and decolonisation of MRSA-colonised residents led to a reduction in the prevalence of MRSA from 8.7% in phase one, 6.3% in phase 2 and 4.7% in phase three. Overall, the study suggests that care-home facilities in Wolverhampton are a significant reservoir for MRSA; screening and decolonisation has reduced the risk to residents going for procedures and has indirectly impacted on MRSA rates in the acute Trust.
Collapse
Affiliation(s)
- Mark I Garvey
- University Hospitals Birmingham NHS Foundation Trust, Queen Elizabeth Hospital Birmingham, Edgbaston, Birmingham, UK
| | - Jodie Winfield
- Infection Prevention Team, The Royal Wolverhampton NHS Trust, New Cross Hospital, Wolverhampton, UK
| | - Carolyn Wiley
- Infection Prevention Team, The Royal Wolverhampton NHS Trust, New Cross Hospital, Wolverhampton, UK
| | - Matthew Reid
- Infection Prevention Team, The Royal Wolverhampton NHS Trust, New Cross Hospital, Wolverhampton, UK
| | - Mike Cooper
- Infection Prevention Team, The Royal Wolverhampton NHS Trust, New Cross Hospital, Wolverhampton, UK
| |
Collapse
|
26
|
Resistance Mechanisms, Epidemiology, and Approaches to Screening for Vancomycin-Resistant Enterococcus in the Health Care Setting. J Clin Microbiol 2016; 54:2436-47. [PMID: 27147728 DOI: 10.1128/jcm.00211-16] [Citation(s) in RCA: 133] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Infections attributable to vancomycin-resistant Enterococcus (VRE) strains have become increasingly prevalent over the past decade. Prompt identification of colonized patients combined with effective multifaceted infection control practices can reduce the transmission of VRE and aid in the prevention of hospital-acquired infections (HAIs). Increasingly, the clinical microbiology laboratory is being asked to support infection control efforts through the early identification of potential patient or environmental reservoirs. This review discusses the factors that contribute to the rise of VRE as an important health care-associated pathogen, the utility of laboratory screening and various infection control strategies, and the available laboratory methods to identify VRE in clinical specimens.
Collapse
|
27
|
An Economic Analysis of Strategies to Control Clostridium Difficile Transmission and Infection Using an Agent-Based Simulation Model. PLoS One 2016; 11:e0152248. [PMID: 27031464 PMCID: PMC4816545 DOI: 10.1371/journal.pone.0152248] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Accepted: 03/11/2016] [Indexed: 12/18/2022] Open
Abstract
Background A number of strategies exist to reduce Clostridium difficile (C. difficile) transmission. We conducted an economic evaluation of “bundling” these strategies together. Methods We constructed an agent-based computer simulation of nosocomial C. difficile transmission and infection in a hospital setting. This model included the following components: interactions between patients and health care workers; room contamination via C. difficile shedding; C. difficile hand carriage and removal via hand hygiene; patient acquisition of C. difficile via contact with contaminated rooms or health care workers; and patient antimicrobial use. Six interventions were introduced alone and "bundled" together: (a) aggressive C. difficile testing; (b) empiric isolation and treatment of symptomatic patients; (c) improved adherence to hand hygiene and (d) contact precautions; (e) improved use of soap and water for hand hygiene; and (f) improved environmental cleaning. Our analysis compared these interventions using values representing 3 different scenarios: (1) base-case (BASE) values that reflect typical hospital practice, (2) intervention (INT) values that represent implementation of hospital-wide efforts to reduce C. diff transmission, and (3) optimal (OPT) values representing the highest expected results from strong adherence to the interventions. Cost parameters for each intervention were obtained from published literature. We performed our analyses assuming low, normal, and high C. difficile importation prevalence and transmissibility of C. difficile. Results INT levels of the “bundled” intervention were cost-effective at a willingness-to-pay threshold of $100,000/quality-adjusted life-year in all importation prevalence and transmissibility scenarios. OPT levels of intervention were cost-effective for normal and high importation prevalence and transmissibility scenarios. When analyzed separately, hand hygiene compliance, environmental decontamination, and empiric isolation and treatment were the interventions that had the greatest impact on both cost and effectiveness. Conclusions A combination of available interventions to prevent CDI is likely to be cost-effective but the cost-effectiveness varies for different levels of intensity of the interventions depending on epidemiological conditions such as C. difficile importation prevalence and transmissibility.
Collapse
|
28
|
The Impact of a Universal Decolonization Protocol on Hospital-Acquired Methicillin-Resistant Staphylococcus aureus in a Burn Population. J Burn Care Res 2016; 37:e525-e530. [DOI: 10.1097/bcr.0000000000000301] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
29
|
Robotham JV, Deeny SR, Fuller C, Hopkins S, Cookson B, Stone S. Cost-effectiveness of national mandatory screening of all admissions to English National Health Service hospitals for meticillin-resistant Staphylococcus aureus: a mathematical modelling study. THE LANCET. INFECTIOUS DISEASES 2015; 16:348-56. [PMID: 26616206 DOI: 10.1016/s1473-3099(15)00417-x] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Revised: 10/21/2015] [Accepted: 10/22/2015] [Indexed: 01/08/2023]
Abstract
BACKGROUND In December, 2010, National Health Service (NHS) England introduced national mandatory screening of all admissions for meticillin-resistant Staphylococcus aureus (MRSA). We aimed to assess the effectiveness and cost-effectiveness of this policy, from a regional or national health-care decision makers' perspective, compared with alternative screening strategies. METHODS We used an individual-based dynamic transmission model parameterised with national MRSA audit data to assess the effectiveness and cost-effectiveness of admission screening of patients in English NHS hospitals compared with five alternative strategies (including no screening, checklist-activated screening, and high-risk specialty-based screening), accompanied by patient isolation and decolonisation, over a 5 year time horizon. We evaluated strategies for different NHS hospital types (acute, teaching, and specialist), MRSA prevalence, and transmission potentials using probabilistic sensitivity analyses. FINDINGS Compared with no screening, mean cost per quality-adjusted life-year (QALY) of screening all admissions was £89,000-148,000 (range £68,000-222,000), and this strategy was consistently more costly and less effective than alternatives for all hospital types. At a £30,000/QALY willingness-to-pay threshold and current prevalence, only the no-screening strategy was cost effective. The next best strategies were, in acute and teaching hospitals, targeting of high-risk specialty admissions (30-40% chance of cost-effectiveness; mean incremental cost-effectiveness ratios [ICERs] £45,200 [range £35,300-61,400] and £48,000/QALY [£34,600-74,800], respectively) and, in specialist hospitals, screening these patients plus risk-factor-based screening of low-risk specialties (a roughly 20% chance of cost-effectiveness; mean ICER £62,600/QALY [£48,000-89,400]). As prevalence and transmission increased, targeting of high-risk specialties became the optimum strategy at the NHS willingness-to-pay threshold (£30,000/QALY). Switching from screening all admissions to only high-risk specialty admissions resulted in a mean reduction in total costs per year (not considering uncertainty) of £2·7 million per acute hospital, £2·9 million per teaching, and £474,000 per specialist hospital for a minimum rise in infections (about one infection per year per hospital). INTERPRETATION Our results show that screening all admissions for MRSA is unlikely to be cost effective in England at the current NHS willingness-to-pay threshold, and our findings informed modified guidance to NHS England in 2014. Screening admissions to high-risk specialties is likely to represent better resource use in terms of cost per QALY gained. FUNDING UK Department of Health.
Collapse
Affiliation(s)
- Julie V Robotham
- Modelling and Economics Unit, Public Health England, London, UK.
| | - Sarah R Deeny
- Modelling and Economics Unit, Public Health England, London, UK
| | - Chris Fuller
- Department of Infection and Population Health, Farr Institute, University College London, UK
| | | | - Barry Cookson
- Division of lnfection and lmmunity, University College London, UK
| | - Sheldon Stone
- Department of Medicine, Royal Free Campus, University College London Medical School, London, UK
| |
Collapse
|
30
|
Cost-effectiveness of strategies to prevent methicillin-resistant Staphylococcus aureus transmission and infection in an intensive care unit. Infect Control Hosp Epidemiol 2015; 36:17-27. [PMID: 25627757 DOI: 10.1017/ice.2014.12] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
OBJECTIVE To create a national policy model to evaluate the projected cost-effectiveness of multiple hospital-based strategies to prevent methicillin-resistant Staphylococcus aureus (MRSA) transmission and infection. DESIGN Cost-effectiveness analysis using a Markov microsimulation model that simulates the natural history of MRSA acquisition and infection. PATIENTS AND SETTING Hypothetical cohort of 10,000 adult patients admitted to a US intensive care unit. METHODS We compared 7 strategies to standard precautions using a hospital perspective: (1) active surveillance cultures; (2) active surveillance cultures plus selective decolonization; (3) universal contact precautions (UCP); (4) universal chlorhexidine gluconate baths; (5) universal decolonization; (6) UCP + chlorhexidine gluconate baths; and (7) UCP+decolonization. For each strategy, both efficacy and compliance were considered. Outcomes of interest were: (1) MRSA colonization averted; (2) MRSA infection averted; (3) incremental cost per colonization averted; (4) incremental cost per infection averted. RESULTS A total of 1989 cases of colonization and 544 MRSA invasive infections occurred under standard precautions per 10,000 patients. Universal decolonization was the least expensive strategy and was more effective compared with all strategies except UCP+decolonization and UCP+chlorhexidine gluconate. UCP+decolonization was more effective than universal decolonization but would cost $2469 per colonization averted and $9007 per infection averted. If MRSA colonization prevalence decreases from 12% to 5%, active surveillance cultures plus selective decolonization becomes the least expensive strategy. CONCLUSIONS Universal decolonization is cost-saving, preventing 44% of cases of MRSA colonization and 45% of cases of MRSA infection. Our model provides useful guidance for decision makers choosing between multiple available hospital-based strategies to prevent MRSA transmission.
Collapse
|
31
|
Universal vs Risk Factor Screening for Methicillin-Resistant Staphylococcus aureus in a Large Multicenter Tertiary Care Facility in Canada. Infect Control Hosp Epidemiol 2015; 37:41-8. [PMID: 26470820 DOI: 10.1017/ice.2015.230] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
OBJECTIVE To assess the clinical effectiveness of a universal screening program compared with a risk factor-based program in reducing the rates of nosocomial methicillin-resistant Staphylococcus aureus (MRSA) among admitted patients at the Ottawa Hospital. DESIGN Quasi-experimental study. SETTING Ottawa Hospital, a multicenter tertiary care facility with 3 main campuses, approximately 47,000 admissions per year, and 1,200 beds. METHODS From January 1, 2006 through December 31, 2007 (24 months), admitted patients underwent risk factor-based MRSA screening. From January 1, 2008 through August 31, 2009 (20 months), all patients admitted underwent universal MRSA screening. To measure the effectiveness of this intervention, segmented regression modeling was used to examine monthly nosocomial MRSA incidence rates per 100,000 patient-days before and during the intervention period. To assess secular trends, nosocomial Clostridium difficile infection, mupirocin prescriptions, and regional MRSA rates were investigated as controls. RESULTS The nosocomial MRSA incidence rate was 46.79 cases per 100,000 patient-days, with no significant differences before and after intervention. The MRSA detection rate per 1,000 admissions increased from 9.8 during risk factor-based screening to 26.2 during universal screening. A total of 644 new nosocomial MRSA cases were observed in 1,448,488 patient-days, 323 during risk factor-based screening and 321 during universal screening. Secular trends in C. difficile infection rates and mupirocin prescriptions remained stable after the intervention whereas population-level MRSA rates decreased. CONCLUSION At Ottawa Hospital, the introduction of universal MRSA admission screening did not significantly affect the rates of nosocomial MRSA compared with risk factor-based screening. Infect. Control Hosp. Epidemiol. 2015;37(1):41-48.
Collapse
|
32
|
Win MK, Soliman TAA, Lee LK, Wong CS, Chow A, Ang B, Roman CL, Leo YS. Review of a two-year methicillin-resistant Staphylococcus aureus screening program and cost-effectiveness analysis in Singapore. BMC Infect Dis 2015; 15:391. [PMID: 26419926 PMCID: PMC4587866 DOI: 10.1186/s12879-015-1131-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Accepted: 09/18/2015] [Indexed: 12/30/2022] Open
Abstract
Background Methicillin-resistant Staphylococcus aureus (MRSA) poses an increasingly large disease and economic burden worldwide. The effectiveness of screening programs in the tropics is poorly understood. The aims of this study are: (i) to analyze the factors affecting MRSA colonization at admission and acquisition during hospitalization and (ii) to evaluate the cost-effectiveness of a screening program which aims to control MRSA incidence during hospitalization. Methods We conducted a retrospective case–control study of patients admitted to the Communicable Disease Centre (CDC) in Singapore between Jan 2009 and Dec 2010 when there was an ongoing selective screening and isolation program. Risk factors contributing to MRSA colonization on admission and acquisition during hospital stay were evaluated using a logistic regression model. In addition, a cost-effectiveness analysis was conducted to determine the cost per disability-adjusted life year (DALY) averted due to implementing the screening and isolation program. Results The average prevalence rate of screened patients at admission and the average acquisition rate at discharge during the study period were 12.1 and 4.8 % respectively. Logistic regression models showed that older age (adjusted odds ratio (OR) 1.03, 95 % CI 1.02–1.04, p < 0.001) and dermatological conditions (adjusted OR 1.49, 95 % CI 1.11–1.20, p = 0.008) were independently associated with an increased risk of MRSA colonization at admission. Age (adjusted OR 1.02, 95 % CI 1.01–1.03, p = 0.002) and length of stay in hospital (adjusted OR 1.04, 95 % CI 1.03–1.06, p < 0.001) were independent factors associated with MRSA acquisition during hospitalization. The screening and isolation program reduced the acquisition rate by 1.6 % and was found to be cost saving. For the whole study period, the program cost US$129,916, while it offset hospitalization costs of US$103,869 and loss of productivity costs of US$50,453 with −400 $/DALY averted. Discussion This study is the first to our knowledge that evaluates the cost-effectiveness of screeningand isolation of MRSA patients in a tropical country. Another unique feature of the analysis is the evaluationof acquisition rates among specific types of patients (dermatological, HIV and infectious disease patients)and the comparison of the cost-effectiveness of screening and isolation between them. Conclusions Overall our results indicate high MRSA prevalence that can be cost effectively reduced by selective screening and isolation programs in Singapore.
Collapse
Affiliation(s)
- Mar-Kyaw Win
- Institute of Infectious Diseases and Epidemiology, Tan Tock Seng Hospital, Singapore, Singapore.
| | | | - Linda Kay Lee
- Institute of Infectious Diseases and Epidemiology, Tan Tock Seng Hospital, Singapore, Singapore.
| | - Chia Siong Wong
- Institute of Infectious Diseases and Epidemiology, Tan Tock Seng Hospital, Singapore, Singapore.
| | - Angela Chow
- Institute of Infectious Diseases and Epidemiology, Tan Tock Seng Hospital, Singapore, Singapore.
| | - Brenda Ang
- Institute of Infectious Diseases and Epidemiology, Tan Tock Seng Hospital, Singapore, Singapore.
| | - Carrasco L Roman
- Department of Biological Sciences, National University of Singapore, Singapore, Singapore.
| | - Yee-Sin Leo
- Institute of Infectious Diseases and Epidemiology, Tan Tock Seng Hospital, Singapore, Singapore. .,Saw Swee Hock School of Public Health, National University of Singapore, Singapore, Singapore.
| |
Collapse
|
33
|
Abstract
PURPOSE OF REVIEW To describe the latest evidence for methicillin-resistant Staphylococcus aureus (MRSA) infection control strategies, with particular emphasis on active surveillance cultures with contact precautions and targeted decolonization, and their impact. RECENT FINDINGS Several major trials published last year questioned the effectiveness of universal screening and contact precautions in controlling MRSA. These trials generally recommend universal decolonization as part of bundles to control MRSA, especially in ICUs, with some even concluding that universal decolonization should replace active screening and contact precautions. However, emerging resistance to agents used for decolonization, such as mupirocin and chlorhexidine, is a major concern. Several other studies confirmed a combination of hand hygiene enhancement, screening, contact precaution and targeted decolonization as a more viable MRSA infection control strategy for specific population groups. SUMMARY Universal decolonization is an acceptable MRSA control strategy for intensive care units; however, close monitoring of chlorhexidine and mupirocin resistance is warranted. As a strategy, screening and contact precautions are suitable for hospital-wide MRSA control. Targeted decolonization is a proven measure for patients undergoing clean surgery. Enhancement of hand hygiene is a core measure regardless of the strategy.
Collapse
|
34
|
Deeny SR, Worby CJ, Tosas Auguet O, Cooper BS, Edgeworth J, Cookson B, Robotham JV. Impact of mupirocin resistance on the transmission and control of healthcare-associated MRSA. J Antimicrob Chemother 2015; 70:3366-78. [PMID: 26338047 PMCID: PMC4652683 DOI: 10.1093/jac/dkv249] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Accepted: 07/20/2015] [Indexed: 12/11/2022] Open
Abstract
Objectives The objectives of this study were to estimate the relative transmissibility of mupirocin-resistant (MupR) and mupirocin-susceptible (MupS) MRSA strains and evaluate the long-term impact of MupR on MRSA control policies. Methods Parameters describing MupR and MupS strains were estimated using Markov chain Monte Carlo methods applied to data from two London teaching hospitals. These estimates parameterized a model used to evaluate the long-term impact of MupR on three mupirocin usage policies: ‘clinical cases’, ‘screen and treat’ and ‘universal’. Strategies were assessed in terms of colonized and infected patient days and scenario and sensitivity analyses were performed. Results The transmission probability of a MupS strain was 2.16 (95% CI 1.38–2.94) times that of a MupR strain in the absence of mupirocin usage. The total prevalence of MupR in colonized and infected MRSA patients after 5 years of simulation was 9.1% (95% CI 8.7%–9.6%) with the ‘screen and treat’ mupirocin policy, increasing to 21.3% (95% CI 20.9%–21.7%) with ‘universal’ mupirocin use. The prevalence of MupR increased in 50%–75% of simulations with ‘universal’ usage and >10% of simulations with ‘screen and treat’ usage in scenarios where MupS had a higher transmission probability than MupR. Conclusions Our results provide evidence from a clinical setting of a fitness cost associated with MupR in MRSA strains. This provides a plausible explanation for the low levels of mupirocin resistance seen following ‘screen and treat’ mupirocin usage. From our simulations, even under conservative estimates of relative transmissibility, we see long-term increases in the prevalence of MupR given ‘universal’ use.
Collapse
Affiliation(s)
- Sarah R Deeny
- Modelling and Economics Unit, Centre for Infectious Disease Surveillance and Control, Public Health England and Health Protection Research Unit in Modelling Methodology, London, UK
| | - Colin J Worby
- Center for Communicable Disease Dynamics, Harvard School of Public Health, Boston, MA, USA
| | - Olga Tosas Auguet
- Centre for Clinical Infection and Diagnostics Research, Department of Infectious Diseases, King's College London, London, UK Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Ben S Cooper
- Centre for Tropical Medicine and Global Health, Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK Mahidol-Oxford Tropical Medicine Research Unit, Bangkok, Thailand
| | - Jonathan Edgeworth
- Centre for Clinical Infection and Diagnostics Research, Department of Infectious Diseases, King's College London, London, UK Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Barry Cookson
- Division of Infection and Immunity, University College London, London, UK
| | - Julie V Robotham
- Modelling and Economics Unit, Centre for Infectious Disease Surveillance and Control, Public Health England and Health Protection Research Unit in Modelling Methodology, London, UK
| |
Collapse
|
35
|
Verykouki E, Kypraios T, O'neill PD. Modelling the effect of antimicrobial treatment on carriage of hospital pathogens with application to MRSA. Biostatistics 2015; 17:65-78. [PMID: 26040911 DOI: 10.1093/biostatistics/kxv020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Accepted: 04/25/2015] [Indexed: 11/14/2022] Open
Abstract
Numerous studies have sought to assess the effectiveness of control measures aimed at reducing the spread of pathogens such as Methicillin-resistant Staphylococcus aureus (MRSA) in hospital settings. Far less is known about possible short-term effects of antibiotics and other antimicrobial treatments on pathogen carriage in patients. This paper is concerned with developing and applying methods for the analysis of detailed data on hospital patients which include information on patient treatments and screening tests for the pathogen in question. The carriage status (colonized, or not) of each patient is modelled as a Markov chain, and models for both perfect and imperfect test sensitivity are developed. Goodness-of-fit procedures based on simulation are also proposed. The methods are illustrated using both simulated data and data on MRSA.
Collapse
Affiliation(s)
- E Verykouki
- School of Mathematical Sciences, University of Nottingham, Nottingham NG7 2RD, UK
| | - T Kypraios
- School of Mathematical Sciences, University of Nottingham, Nottingham NG7 2RD, UK
| | - P D O'neill
- School of Mathematical Sciences, University of Nottingham, Nottingham NG7 2RD, UK
| |
Collapse
|
36
|
Antonanzas F, Lozano C, Torres C. Economic features of antibiotic resistance: the case of methicillin-resistant Staphylococcus aureus. PHARMACOECONOMICS 2015; 33:285-325. [PMID: 25447195 DOI: 10.1007/s40273-014-0242-y] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
This paper analyses and updates the economic information regarding methicillin-resistant Staphylococcus aureus (MRSA), including information that has been previously reviewed by other authors, and new information, for the purpose of facilitating health management and clinical decisions. The analysed articles reveal great disparity in the economic burden on MRSA patients; this is mainly due to the diversity of the designs of the studies, as well as the variability of the patients and the differences in health care systems. Regarding prophylactic strategies, the studies do not provide conclusive results that could unambiguously orientate health management. The studies addressing treatments noted that linezolid seems to be a cost-effective treatment for MRSA, mostly because it is associated with a shorter length of stay (LOS) in hospital. However, important variables such as antimicrobial susceptibility, infection type and resistance emergence should be included in these analyses before a conclusion is reached regarding which treatment is the best (most efficient). The reviewed studies found that rapid MRSA detection, using molecular techniques, is an efficient technique to control MRSA. As a general conclusion, the management of MRSA infections implicates important economic costs for hospitals, as they result in higher direct costs and longer LOS than those related to methicillin-susceptible S. aureus (MSSA) patients or MRSA-free patients; there is wide variability in those increased costs, depending on different variables. Moreover, the research reveals a lack of studies on other related topics, such as the economic implications of changes in MRSA epidemiology (community patients and lineages associated with farm animals).
Collapse
|
37
|
Methicillin-resistant Staphylococcus aureus prevention strategies in the ICU: a clinical decision analysis*. Crit Care Med 2015; 43:382-93. [PMID: 25377019 DOI: 10.1097/ccm.0000000000000711] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVES ICUs are a major reservoir of methicillin-resistant Staphylococcus aureus. Our aim was to estimate costs and effectiveness of methicillin-resistant Staphylococcus aureus prevention policies. DESIGN AND INTERVENTIONS We evaluated three up-to-date methicillin-resistant Staphylococcus aureus prevention policies, namely, 1) nasal screening and contact precautions of methicillin-resistant Staphylococcus aureus-positive patients; 2) nasal screening, contact precautions, and decolonization (targeted decolonization) of methicillin-resistant Staphylococcus aureus carriers; and 3) universal decolonization without screening. We implemented a decision-analytic model with deterministic and probabilistic analyses. Methicillin-resistant Staphylococcus aureus infections averted, quality-adjusted life years gained, and incremental cost-effectiveness ratios were calculated. Cost-effectiveness planes and acceptability curves were plotted for various willingness-to-pay thresholds to address uncertainty. MEASUREMENTS AND MAIN RESULTS At base-case scenario, universal decolonization was the dominant strategy; it averted 1.31% and 1.59% of methicillin-resistant Staphylococcus aureus infections over targeted decolonization and screening and contact precautions, respectively, and saved $16,203/quality-adjusted life year over targeted decolonization and 14,562/quality-adjusted life year over screening and contact precautions. Results were robust in sensitivity analysis for a wide range of input variables. In probabilistic analysis, universal decolonization increased quality-adjusted life years by 1.06% (95% CI, 1.02-1.09) over targeted decolonization and by 1.29% (95% CI, 1.24-1.33) over screening and contact precautions; universal decolonization resulted in average savings of $172 (95% CI, $168-$175) and $189 (95% CI, $185-$193) over targeted decolonization and screening and contact precautions, respectively. With willingness-to-pay threshold per quality-adjusted life year gained ranging from $0 to $50,000, universal decolonization was dominant over targeted decolonization in 67.5-75.4% and dominant over screening and contact precautions in 66.0-75.4%. CONCLUSIONS In the ICU setting, universal decolonization outperforms the other two strategies and is likely to be cost-effective even at low willingness-to-pay thresholds. Assuming 700 annual ICU admissions in an average 12-bed ICU, the projected annual savings reach $129,500 to $135,100.
Collapse
|
38
|
Lee AS, Pan A, Harbarth S, Patroni A, Chalfine A, Daikos GL, Garilli S, Martínez JA, Cooper BS. Variable performance of models for predicting methicillin-resistant Staphylococcus aureus carriage in European surgical wards. BMC Infect Dis 2015; 15:105. [PMID: 25880328 PMCID: PMC4347652 DOI: 10.1186/s12879-015-0834-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2014] [Accepted: 02/12/2015] [Indexed: 11/10/2022] Open
Abstract
Background Predictive models to identify unknown methicillin-resistant Staphylococcus aureus (MRSA) carriage on admission may optimise targeted MRSA screening and efficient use of resources. However, common approaches to model selection can result in overconfident estimates and poor predictive performance. We aimed to compare the performance of various models to predict previously unknown MRSA carriage on admission to surgical wards. Methods The study analysed data collected during a prospective cohort study which enrolled consecutive adult patients admitted to 13 surgical wards in 4 European hospitals. The participating hospitals were located in Athens (Greece), Barcelona (Spain), Cremona (Italy) and Paris (France). Universal admission MRSA screening was performed in the surgical wards. Data regarding demographic characteristics and potential risk factors for MRSA carriage were prospectively collected during the study period. Four logistic regression models were used to predict probabilities of unknown MRSA carriage using risk factor data: “Stepwise” (variables selected by backward elimination); “Best BMA” (model with highest posterior probability using Bayesian model averaging which accounts for uncertainty in model choice); “BMA” (average of all models selected with BMA); and “Simple” (model including variables selected >50% of the time by both Stepwise and BMA approaches applied to repeated random sub-samples of 50% of the data). To assess model performance, cross-validation against data not used for model fitting was conducted and net reclassification improvement (NRI) was calculated. Results Of 2,901 patients enrolled, 111 (3.8%) were newly identified MRSA carriers. Recent hospitalisation and presence of a wound/ulcer were significantly associated with MRSA carriage in all models. While all models demonstrated limited predictive ability (mean c-statistics <0.7) the Simple model consistently detected more MRSA-positive individuals despite screening fewer patients than the Stepwise model. Moreover, the Simple model improved reclassification of patients into appropriate risk strata compared with the Stepwise model (NRI 6.6%, P = .07). Conclusions Though commonly used, models developed using stepwise variable selection can have relatively poor predictive value. When developing MRSA risk indices, simpler models, which account for uncertainty in model selection, may better stratify patients’ risk of unknown MRSA carriage.
Collapse
Affiliation(s)
- Andie S Lee
- Infection Control Program, University of Geneva Hospitals and Faculty of Medicine, Geneva, Switzerland. .,Departments of Infectious Diseases and Microbiology, Royal Prince Alfred Hospital, Sydney, Australia.
| | - Angelo Pan
- Infectious and Tropical Diseases Unit, Istituti Ospitalieri di Cremona, Cremona, Italy.
| | - Stephan Harbarth
- Infection Control Program, University of Geneva Hospitals and Faculty of Medicine, Geneva, Switzerland.
| | | | - Annie Chalfine
- Infection Control Unit, Groupe Hospitalier Paris Saint-Joseph, Paris, France.
| | - George L Daikos
- First Department of Propaedeutic Medicine, Laiko General Hospital, Athens, Greece.
| | - Silvia Garilli
- Infectious and Tropical Diseases Unit, Istituti Ospitalieri di Cremona, Cremona, Italy.
| | | | - Ben S Cooper
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand. .,Centre for Clinical Vaccinology and Tropical Medicine, Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK.
| | | |
Collapse
|
39
|
Abstract
PURPOSE OF REVIEW This review explores the usefulness of surveillance cultures in healthcare-associated pneumonia (HCAP). RECENT FINDINGS The definition of HCAP is controversial. Causative micro-organisms of HCAP resemble those found in hospital-acquired pneumonia (HAP) and ventilator-associated pneumonia (VAP). Some types of surveillance cultures have proven useful in hospitalized patients. Whereas numerous studies have investigated the role of surveillance cultures in VAP, one may wonder whether surveillance culture implementation should belong in HCAP management guidelines. SUMMARY Studies exploring the usefulness of obtaining surveillance cultures in VAP are numerous, but are mostly retrospective, observational and/or quasi-experimental in nature. Surveillance cultures may be useful for antibiotic guidance, but positive predictive value and specificity of surveillance cultures are low, obviously negatively impacting on cost effectiveness, especially in the large population at risk for HCAP. On the other hand, multidrug-resistance is increasing and surveillance cultures for methicillin-resistant Staphylococcus aureus and vancomycin-resistant enterococci in ICU-admitted patients appeared useful and cost-effective. Furthermore, surveillance cultures for the presence of multidrug-resistant Gram-negative bacilli might be useful for antibiotic guidance. Currently, neither community-acquired pneumonia, HCAP, HAP nor VAP guidelines incorporate surveillance cultures. In the future, surveillance cultures in populations at risk for HCAP may be able to differentiate HCAP from other kinds of pneumonia and authorize its reason for existence.
Collapse
|
40
|
Larsen J, David MZ, Vos MC, Coombs GW, Grundmann H, Harbarth S, Voss A, Skov RL. Preventing the introduction of meticillin-resistant Staphylococcus aureus into hospitals. J Glob Antimicrob Resist 2014; 2:260-268. [PMID: 27873685 DOI: 10.1016/j.jgar.2014.09.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Revised: 09/16/2014] [Accepted: 09/21/2014] [Indexed: 11/28/2022] Open
Abstract
The objective of this review was to provide an up-to-date account of the interventions used to prevent the introduction of meticillin-resistant Staphylococcus aureus (MRSA) from the expanding community and livestock reservoirs into hospitals in the USA, Denmark, The Netherlands and Western Australia. A review of existing literature and local guidelines for the management of MRSA in hospitals was performed. In Denmark, The Netherlands and Western Australia, where the prevalence of MRSA is relatively low, targeted admission screening and isolation of predefined high-risk populations have been used for several decades to successfully control MRSA in the hospital. Furthermore, in Denmark and The Netherlands, all identified MRSA carriers undergo routine decolonisation, whereas only carriers of particularly transmissible or virulent MRSA clones are subjected to decolonisation in Western Australia. In the USA, which continues to be a high-prevalence MRSA country, policies vary by state and even by hospital, and whilst guidelines from professional organisations provide a framework for infection control practices, these guidelines lack the authority of a legislative mandate. In conclusion, the changing epidemiology of MRSA, exemplified by the recent emergence of MRSA in the community and in food animals, makes it increasingly difficult to accurately identify specific high-risk groups to screen for MRSA carriage. Understanding the changing epidemiology of MRSA in a local as well as global context is fundamental to prevent the introduction of MRSA into hospitals.
Collapse
Affiliation(s)
- Jesper Larsen
- Microbiology and Infection Control, Statens Serum Institut, Copenhagen S, Denmark.
| | - Michael Z David
- Department of Medicine, University of Chicago, Chicago, IL, USA
| | - Margreet C Vos
- Department of Medical Microbiology and Infectious Diseases, University Medical Center Rotterdam, Erasmus MC, Rotterdam, The Netherlands
| | - Geoffrey W Coombs
- Australian Collaborating Centre for Enterococcus and Staphylococcus Species (ACCESS) Typing and Research, Curtin University, Perth, WA, Australia; Department of Microbiology and Infectious Diseases, PathWest Laboratory Medicine, Royal Perth Hospital, Perth, WA, Australia
| | - Hajo Grundmann
- Department of Medical Microbiology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Stephan Harbarth
- Infection Control Program and Division of Infectious Diseases, Geneva University Hospitals and Medical School, Geneva, Switzerland
| | - Andreas Voss
- Department of Medical Microbiology, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands; Department of Medical Microbiology and Infectious Diseases, Canisius-Wilhelmina Hospital, Nijmegen, The Netherlands
| | - Robert L Skov
- Microbiology and Infection Control, Statens Serum Institut, Copenhagen S, Denmark
| |
Collapse
|
41
|
Robinson J, Edgley A, Morrell J. MRSA care in the community: why patient education matters. Br J Community Nurs 2014; 19:436-8, 440-1. [PMID: 25184897 DOI: 10.12968/bjcn.2014.19.9.436] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
In primary care, patients are prescribed decolonisation treatment to eradicate meticillin-resistant Staphylococcus aureus (MRSA). This complex treatment process requires the patient to apply a topical antimicrobial treatment as well as adhering to rigorous cleaning regimens to ensure the environment is effectively managed. A pilot study was carried out that involved developing an enhanced, nurse-delivered education tool, training a community nurse to use it, then testing its use with a patient. Three interviews were carried out: one with a patient who received usual care, one with a patient who received the enhanced education and one with the community nurse who delivered the enhanced education tool. The patient who received the enhanced education reported better knowledge and understanding of the application of treatment than the patient who did not. These results are interesting and point the way forward for larger research studies to build on the learning from this limited exploration and develop more effective management of MRSA in primary care.
Collapse
Affiliation(s)
- Jude Robinson
- Infection Prevention and Control Matron, Nottingham CityCare Partnership
| | | | | |
Collapse
|
42
|
Otter JA, Tosas-Auguet O, Herdman MT, Williams B, Tucker D, Edgeworth JD, French GL. Implications of targeted versus universal admission screening for meticillin-resistant Staphylococcus aureus carriage in a London hospital. J Hosp Infect 2014; 87:171-4. [PMID: 24928784 DOI: 10.1016/j.jhin.2014.04.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Accepted: 04/29/2014] [Indexed: 10/25/2022]
Abstract
Universal admission screening for meticillin-resistant Staphylococcus aureus (MRSA) has been performed in England since 2010. We evaluated the predictive performance of a regression model derived from the first year of universal screening for detecting MRSA at hospital admission. If we had used our previous targeted screening policy, 75% fewer patients (21,699 per year) would have been screened. However, this would have identified only ~55% of all MRSA carriers, 65% of healthcare-associated MRSA strains, and 40% of community-associated strains. Failing to identify ~45% of patients (262 per year) carrying MRSA at hospital admission may have implications for MRSA control.
Collapse
Affiliation(s)
- J A Otter
- Centre for Clinical Infection and Diagnostics Research (CIDR), Department of Infectious Diseases, King's College London, and Guy's and St Thomas' Hospital NHS Foundation Trust London, UK.
| | - Olga Tosas-Auguet
- Centre for Clinical Infection and Diagnostics Research (CIDR), Department of Infectious Diseases, King's College London, and Guy's and St Thomas' Hospital NHS Foundation Trust London, UK
| | - M T Herdman
- Directorate of Infectious Diseases, Guy's and St Thomas' Hospital NHS Foundation Trust, London, UK
| | - B Williams
- Directorate of Infectious Diseases, Guy's and St Thomas' Hospital NHS Foundation Trust, London, UK
| | - D Tucker
- Directorate of Infectious Diseases, Guy's and St Thomas' Hospital NHS Foundation Trust, London, UK
| | - J D Edgeworth
- Centre for Clinical Infection and Diagnostics Research (CIDR), Department of Infectious Diseases, King's College London, and Guy's and St Thomas' Hospital NHS Foundation Trust London, UK
| | - G L French
- Centre for Clinical Infection and Diagnostics Research (CIDR), Department of Infectious Diseases, King's College London, and Guy's and St Thomas' Hospital NHS Foundation Trust London, UK
| |
Collapse
|
43
|
Wong C, Luk IW, Ip M, You JH. Prevention of gram-positive infections in peritoneal dialysis patients in Hong Kong: a cost-effectiveness analysis. Am J Infect Control 2014; 42:412-6. [PMID: 24679568 DOI: 10.1016/j.ajic.2013.12.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2013] [Revised: 12/09/2013] [Accepted: 12/09/2013] [Indexed: 11/26/2022]
Abstract
BACKGROUND Gram-positive bacteria are the major causative pathogens of peritonitis and exit site infection in patients undergoing peritoneal dialysis (PD). We investigated the cost-effectiveness of regular application of mupirocin at the exit site in PD recipients from the perspective of health care providers in Hong Kong. METHODS A decision tree was designed to simulate outcomes of incident PD patients with and without regular application of mupirocin over a 1-year period. Outcome measures included total direct medical costs, quality-adjusted life-years (QALYs) gained, and gram-positive infection-related mortality rate. Model inputs were derived from the literature. Sensitivity analyses evaluated the impact of uncertainty in all model variables. RESULTS In a base case analysis, the mupirocin group had a higher expected QALY value (0.6496 vs 0.6456), a lower infection-related mortality rate (0.18% vs 1.64%), and a lower total cost per patient (US $258 vs $1661) compared with the control group. The rate of gram-positive peritonitis without mupirocin and the risk of gram-positive peritonitis with mupirocin were influential factors. In 10,000 Monte Carlo simulations, the mupirocin group had significantly lower associated costs, higher QALYs, and a lower mortality rate 99.9% of the time. CONCLUSIONS Topical mupirocin appears to be a cost-effective preventive measure against gram-positive infection in incident patients undergoing PD. The cost-effectiveness of mupirocin is affected by the level of infection risk reduction and subject to resistance against mupirocin.
Collapse
|
44
|
Hagiya H, Mio M, Murase T, Egawa K, Kokumai Y, Uchida T, Morimoto N, Otsuka F, Shiota S. Is wet swab superior to dry swab as an intranasal screening test? J Intensive Care 2013; 1:10. [PMID: 25705403 PMCID: PMC4336270 DOI: 10.1186/2052-0492-1-10] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2013] [Accepted: 11/05/2013] [Indexed: 11/10/2022] Open
Abstract
Methicillin-resistant Staphylococcus aureus is still a great concern, and recognition of the carrier is essential for appropriate infection control in intensive care units. The utility of wet swab compared to dry swab as an intranasal screening test has not been well assessed yet. A comparative study of the wet and dry swab in its ability to detect the organism was performed against critically ill patients, and it was found that there were no statistically significant differences between the two different methods. The wet swab did not show increased sensitivity compared to dry one.
Collapse
Affiliation(s)
- Hideharu Hagiya
- Department of Clinical Laboratory, Microbiology Division, Tsuyama Central Hospital, Okayama, 708-0841 Japan ; Department of Nursing, Tsuyama Central Hospital, Okayama, 708-0841 Japan
| | - Mitsunobu Mio
- Laboratory of Pathogenic Microbiology, School of Pharmacy, Shujitsu University, Okayama, 703-8516 Japan
| | - Tomoko Murase
- Department of Clinical Laboratory, Microbiology Division, Tsuyama Central Hospital, Okayama, 708-0841 Japan
| | - Keiko Egawa
- Department of Nursing, Tsuyama Central Hospital, Okayama, 708-0841 Japan
| | - Yumi Kokumai
- Department of Nursing, Tsuyama Central Hospital, Okayama, 708-0841 Japan
| | - Taeko Uchida
- Laboratory of Pathogenic Microbiology, School of Pharmacy, Shujitsu University, Okayama, 703-8516 Japan
| | - Naoki Morimoto
- Department of Nursing, Tsuyama Central Hospital, Okayama, 708-0841 Japan
| | - Fumio Otsuka
- Department of Clinical Laboratory, Microbiology Division, Tsuyama Central Hospital, Okayama, 708-0841 Japan
| | - Sumiko Shiota
- Laboratory of Pathogenic Microbiology, School of Pharmacy, Shujitsu University, Okayama, 703-8516 Japan
| |
Collapse
|
45
|
Ridgway JP, Peterson LR, Brown EC, Du H, Hebert C, Thomson RB, Kaul KL, Robicsek A. Clinical significance of methicillin-resistant Staphylococcus aureus colonization on hospital admission: one-year infection risk. PLoS One 2013; 8:e79716. [PMID: 24278161 PMCID: PMC3835821 DOI: 10.1371/journal.pone.0079716] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2013] [Accepted: 10/04/2013] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Methicillin-resistant Staphylococcus aureus (MRSA) nasal colonization among inpatients is a well-established risk factor for MRSA infection during the same hospitalization, but the long-term risk of MRSA infection is uncertain. We performed a retrospective cohort study to determine the one-year risk of MRSA infection among inpatients with MRSA-positive nasal polymerase chain reaction (PCR) tests confirmed by positive nasal culture (Group 1), patients with positive nasal PCR but negative nasal culture (Group 2), and patients with negative nasal PCR (Group 3). METHODOLOGY/PRINCIPAL FINDINGS Subjects were adults admitted to a four-hospital system between November 1, 2006 and March 31, 2011, comprising 195,255 admissions. Patients underwent nasal swab for MRSA PCR upon admission; if positive, nasal culture for MRSA was performed; if recovered, MRSA was tested for Panton-Valentine Leukocidin (PVL). Outcomes included MRSA-positive clinical culture and skin and soft tissue infection (SSTI). Group 1 patients had a one-year risk of MRSA-positive clinical culture of 8.0% compared with 3.0% for Group 2 patients, and 0.6% for Group 3 patients (p<0.001). In a multivariable model, the hazard ratios for future MRSA-positive clinical culture were 6.52 (95% CI, 5.57 to 7.64) for Group 1 and 3.40 (95% CI, 2.70 to 4.27) for Group 2, compared with Group 3 (p<0.0001). History of MRSA and concurrent MRSA-positive clinical culture were significant risk factors for future MRSA-positive clinical culture. Group 1 patients colonized with PVL-positive MRSA had a one-year risk of MRSA-positive clinical culture of 10.1%, and a one-year risk of MRSA-positive clinical culture or SSTI diagnosis of 21.7%, compared with risks of 7.1% and 12.5%, respectively, for patients colonized with PVL-negative MRSA (p = 0.04, p = 0.005, respectively). CONCLUSIONS/SIGNIFICANCE MRSA nasal colonization is a significant risk factor for future MRSA infection; more so if detected by culture than PCR. Colonization with PVL-positive MRSA is associated with greater risk than PVL-negative MRSA.
Collapse
Affiliation(s)
- Jessica P. Ridgway
- Department of Medicine, University of Chicago, Chicago, Illinois, United States of America
| | - Lance R. Peterson
- Department of Pathology, NorthShore University HealthSystem, Evanston, Illinois, United States of America
- Department of Medicine, NorthShore University HealthSystem, Evanston, Illinois, United States of America
- The University of Chicago Pritzker School of Medicine, Chicago, Illinois, United States of America
| | - Eric C. Brown
- Center for Clinical and Research Informatics, NorthShore University HealthSystem, Evanston, Illinois, United States of America
| | - Hongyan Du
- Center for Clinical and Research Informatics, NorthShore University HealthSystem, Evanston, Illinois, United States of America
| | - Courtney Hebert
- Department of Biomedical Informatics, The Ohio State University Medical Center, Columbus, Ohio, United States of America
| | - Richard B. Thomson
- Department of Pathology, NorthShore University HealthSystem, Evanston, Illinois, United States of America
- The University of Chicago Pritzker School of Medicine, Chicago, Illinois, United States of America
| | - Karen L. Kaul
- Department of Pathology, NorthShore University HealthSystem, Evanston, Illinois, United States of America
- The University of Chicago Pritzker School of Medicine, Chicago, Illinois, United States of America
| | - Ari Robicsek
- Department of Medicine, NorthShore University HealthSystem, Evanston, Illinois, United States of America
- The University of Chicago Pritzker School of Medicine, Chicago, Illinois, United States of America
- Department of Clinical Analytics, NorthShore University HealthSystem, Evanston, Illinois, United States of America
| |
Collapse
|
46
|
Abstract
Microbiology laboratories have traditionally relied upon phenotypic methods involving culture and biochemical testing to identify and characterize clinically important pathogens. These techniques have several disadvantages including poor sensitivity and long turn-around time. Molecular and mass spectroscopy techniques are rapidly changing infection diagnosis and management. Compared with conventional culture-based techniques, these modern approaches provide substantially more rapid and specific information on organism identification and on the presence of resistance mechanisms. These methods are expected to contribute substantially to enhancing antibiotic stewardship and to improving ‘time to appropriate antibiotics’, one of the most important factors in improving the prognosis of patients with life-threatening infections. This article gives an overview of some of the practical applications of these newer technologies.
Collapse
Affiliation(s)
- Simon Goldenberg
- is a Consultant Microbiologist and Infection Control Doctor at Guy's and St Thomas' NHS Foundation Trust and Honorary Senior Lecturer at King's College, London, UK. His research interests include healthcare-associated infections including Clostridium difficile, molecular and point-of-care diagnostics. Conflicts of interest: none declared
| |
Collapse
|
47
|
Interventions to reduce colonisation and transmission of antimicrobial-resistant bacteria in intensive care units: an interrupted time series study and cluster randomised trial. THE LANCET. INFECTIOUS DISEASES 2013; 14:31-39. [PMID: 24161233 PMCID: PMC3895323 DOI: 10.1016/s1473-3099(13)70295-0] [Citation(s) in RCA: 236] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Background Intensive care units (ICUs) are high-risk areas for transmission of antimicrobial-resistant bacteria, but no controlled study has tested the effect of rapid screening and isolation of carriers on transmission in settings with best-standard precautions. We assessed interventions to reduce colonisation and transmission of antimicrobial-resistant bacteria in European ICUs. Methods We did this study in three phases at 13 ICUs. After a 6 month baseline period (phase 1), we did an interrupted time series study of universal chlorhexidine body-washing combined with hand hygiene improvement for 6 months (phase 2), followed by a 12–15 month cluster randomised trial (phase 3). ICUs were randomly assigned by computer generated randomisation schedule to either conventional screening (chromogenic screening for meticillin-resistant Staphylococcus aureus [MRSA] and vancomycin-resistant enterococci [VRE]) or rapid screening (PCR testing for MRSA and VRE and chromogenic screening for highly resistant Enterobacteriaceae [HRE]); with contact precautions for identified carriers. The primary outcome was acquisition of resistant bacteria per 100 patient-days at risk, for which we calculated step changes and changes in trends after the introduction of each intervention. We assessed acquisition by microbiological surveillance and analysed it with a multilevel Poisson segmented regression model. We compared screening groups with a likelihood ratio test that combined step changes and changes to trend. This study is registered with ClinicalTrials.gov, number NCT00976638. Findings Seven ICUs were assigned to rapid screening and six to conventional screening. Mean hand hygiene compliance improved from 52% in phase 1 to 69% in phase 2, and 77% in phase 3. Median proportions of patients receiving chlorhexidine body-washing increased from 0% to 100% at the start of phase 2. For trends in acquisition of antimicrobial-resistant bacteria, weekly incidence rate ratio (IRR) was 0·976 (0·954–0·999) for phase 2 and 1·015 (0·998–1·032) for phase 3. For step changes, weekly IRR was 0·955 (0·676–1·348) for phase 2 and 0·634 (0·349–1·153) for phase 3. The decrease in trend in phase 2 was largely caused by changes in acquisition of MRSA (weekly IRR 0·925, 95% CI 0·890–0·962). Acquisition was lower in the conventional screening group than in the rapid screening group, but did not differ significantly (p=0·06). Interpretation Improved hand hygiene plus unit-wide chlorhexidine body-washing reduced acquisition of antimicrobial-resistant bacteria, particularly MRSA. In the context of a sustained high level of compliance to hand hygiene and chlorhexidine bathings, screening and isolation of carriers do not reduce acquisition rates of multidrug-resistant bacteria, whether or not screening is done with rapid testing or conventional testing. Funding European Commission.
Collapse
|
48
|
Balm MND, Lover AA, Salmon S, Tambyah PA, Fisher DA. Progression from new methicillin-resistant Staphylococcus aureus colonisation to infection: an observational study in a hospital cohort. BMC Infect Dis 2013; 13:491. [PMID: 24148135 PMCID: PMC4015767 DOI: 10.1186/1471-2334-13-491] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2013] [Accepted: 10/11/2013] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Patients newly colonised with methicillin-resistant Staphylococcus aureus (MRSA) are at higher risk of clinical MRSA infection. At present, there are limited data on the duration or magnitude of this risk in a hospital population with a known time of MRSA acquisition. METHODS A retrospective cohort study of 909 adult patients known to have newly identified MRSA colonisation during admission to National University Hospital, Singapore between 1 July 2007 and 30 June 2011 was undertaken. Patients were excluded if they had history of previous MRSA colonisation or infection, or if they had been a hospital inpatient in the preceding 12 months. Data were collected on the development of MRSA infection requiring hospitalisation up to 30 June 2012. RESULTS Of 840 patients newly colonised with MRSA as identified on active surveillance and not clinical specimens, 546 were men (65.0%) and the median age was 65 years (range 18-103 years). Median follow up was 24 months (range 0 -64 months, 85.1% followed >6 months). Clinical infection occurred in 121 patients (14.4%) with median time to infection of 22 days (95% CI 14-31). Overall 71.9% (87/121) of infected patients developed infection within 60 days of the date MRSA colonisation was detected. However, 17/121 patients (14.0%) developed clinical infection more than six months after documented MRSA acquisition. The most common sites of clinical infection were skin and soft tissue (49/121, 40.5%, 95% CI 31.7-49.8), respiratory tract (37/121, 30.6%, 95% CI 22.5-39.6) and bone and joint infections (14/121, 11.6%, 95% CI 6.5-18.7). Thirteen patients (13/121, 10.7%, 95% CI 5.8-17.7) had bacteraemias, of which six (5.0% 95% CI 1.8-10.5) were primary and seven (5.7%, 95% CI 2.3-11.6) were secondary to infection at other sites. Crude mortality at 30 days and six months was higher in patients with MRSA infection than colonisation alone (aOR 5.49, 95% CI 2.75-10.95, p<0.001 and aOR 2.94, 95% CI 1.78-4.85, p<0.001 respectively). CONCLUSION Risk of clinical infection is highest soon after MRSA acquisition. Prevention of MRSA acquisition in hospital will have significant impact on morbidity and mortality for patients.
Collapse
Affiliation(s)
| | | | | | | | - Dale A Fisher
- Infection Control Team, National University Hospital, Singapore, Singapore.
| |
Collapse
|
49
|
Epidemiological interpretation of studies examining the effect of antibiotic usage on resistance. Clin Microbiol Rev 2013; 26:289-307. [PMID: 23554418 DOI: 10.1128/cmr.00001-13] [Citation(s) in RCA: 121] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Bacterial resistance to antibiotics is a growing clinical problem and public health threat. Antibiotic use is a known risk factor for the emergence of antibiotic resistance, but demonstrating the causal link between antibiotic use and resistance is challenging. This review describes different study designs for assessing the association between antibiotic use and resistance and discusses strengths and limitations of each. Approaches to measuring antibiotic use and antibiotic resistance are presented. Important methodological issues such as confounding, establishing temporality, and control group selection are examined.
Collapse
|
50
|
Neue Aspekte zur Prävention nosokomialer Infektionen mit multiresistenten Erregern. Hautarzt 2013; 64:695-6. [DOI: 10.1007/s00105-013-2640-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|