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Zhang Z, Li H, Hu Y, Sun B, Ke T, Wu Q, Lian X, Yu W. The efficacy and safety of inhaled antibiotics for pneumonia: A systematic review and meta-analysis. Pulm Pharmacol Ther 2024; 86:102315. [PMID: 39009240 DOI: 10.1016/j.pupt.2024.102315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Revised: 06/15/2024] [Accepted: 07/12/2024] [Indexed: 07/17/2024]
Abstract
OBJECTIVES The aim of this study was to evaluate the efficacy and safety of inhaled antibiotics for adults with pneumonia by meta-analysis. METHODS Literature retrieval was completed through five databases (PubMed, Embase, Cochrane Library, Web of Science and Scopus) by the deadline of May 31, 2024. The process of study selection and data extraction were performed independently by two reviewers. The quality of observational studies and randomized controlled trial (RCT) studies were evaluated by Newcastle Ottawa scale and Jadad scale, respectively. The primary outcomes included mortality, clinical cure, and microbiological cure. Secondary outcomes were recurrence and renal impairment. RESULTS There were 30 studies were analyzed, including 12 RCT studies and 18 observational studies. Inhaled antibiotics did not significantly reduce mortality in RCT studies (odds ratio (OR) = 1.06, 95 % confidence interval (CI): 0.80-1.41). Inhaled antibiotics were associated with higher rates of clinical cure (OR = 1.47 95%CI: 0.82-2.66 in RCT studies and OR = 2.09, 95%CI: 1.36-3.21 in observational studies) and microbiological cure (OR = 7.00 in RCT studies and OR = 2.20 in observational studies). Subgroup analysis showed patients received inhaled antibiotics combined with intravenous administration and inhaled amikacin had better improvements of mortality, clinical cure and microbiological cure. Inhaled antibiotics were not associated with recurrence. The pooled OR of renal impairment were 0.65 (95%CI: 0.27-1.13; I-squared = 43.5 %, P = 0.124) and 0.63(95%CI: 0.26-1.11; I-squared = 69.0 %, P = 0.110) in RCT studies and observational studies, respectively. CONCLUSIONS Inhaled antibiotics decreased risk of renal impairment and achieved significant improvements of clinical and microbiological cure in patients with pneumoniae.
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Affiliation(s)
- Zengzeng Zhang
- Department of Infectious Diseases, The Affiliated Xiangshan Hospital of Wenzhou Medical University, Xiangshan First People's Hospital Medical and Health Group, Ningbo Fourth Hospital, Ningbo, China
| | - Hong Li
- Department of Infectious Diseases, The Affiliated Xiangshan Hospital of Wenzhou Medical University, Xiangshan First People's Hospital Medical and Health Group, Ningbo Fourth Hospital, Ningbo, China
| | - Yutao Hu
- Department of Infectious Diseases, The Affiliated Xiangshan Hospital of Wenzhou Medical University, Xiangshan First People's Hospital Medical and Health Group, Ningbo Fourth Hospital, Ningbo, China
| | - Binhui Sun
- Department of Infectious Diseases, The Affiliated Xiangshan Hospital of Wenzhou Medical University, Xiangshan First People's Hospital Medical and Health Group, Ningbo Fourth Hospital, Ningbo, China
| | - Tingting Ke
- Department of Infectious Diseases, The Affiliated Xiangshan Hospital of Wenzhou Medical University, Xiangshan First People's Hospital Medical and Health Group, Ningbo Fourth Hospital, Ningbo, China
| | - Qihuan Wu
- Department of Infectious Diseases, The Affiliated Xiangshan Hospital of Wenzhou Medical University, Xiangshan First People's Hospital Medical and Health Group, Ningbo Fourth Hospital, Ningbo, China
| | - Xiang Lian
- Department of Infectious Diseases, The Affiliated Xiangshan Hospital of Wenzhou Medical University, Xiangshan First People's Hospital Medical and Health Group, Ningbo Fourth Hospital, Ningbo, China.
| | - Wei Yu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.
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Lu D, Mao W. Efficacy and safety of intravenous combined with aerosolised polymyxin versus intravenous polymyxin alone in the treatment of multidrug-resistant gram-negative bacterial pneumonia: A systematic review and meta-analysis. Heliyon 2023; 9:e15774. [PMID: 37159708 PMCID: PMC10163663 DOI: 10.1016/j.heliyon.2023.e15774] [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: 02/05/2023] [Revised: 04/18/2023] [Accepted: 04/21/2023] [Indexed: 05/11/2023] Open
Abstract
Background Previous studies have questioned the efficacy and safety of intravenous combined with aerosolised (IV + AS) polymyxin versus intravenous (IV) polymyxin alone in the treatment of patients with multidrug-resistant gram-negative bacterial (MDR-GNB) pneumonia. Therefore, we conducted a meta-analysis to evaluate the efficacy and safety of IV + AS polymyxin in the treatment of MDR-GNB pneumonia. Methods We identified all relevant studies by searching the PubMed, EMBASE and Cochrane library databases from their inception to May 31, 2022. All included studies were evaluated using the Newcastle Ottawa scale (NOS) checklist. The summary relative risk (RR) and 95% confidence interval (CI) were used to determine the outcome differences between the IV + AS and the IV groups. Subgroup analysis was performed based on population, polymyxin dose and kinds of polymyxin. Results A total of 16 studies were included in the meta-analysis. The IV + AS group had lower mortality (RR = 0.86, 95% CI: 0.77-0.97, P = 0.01) than the IV group. Subgroup analysis revealed that IV + AS polymyxin could reduce mortality only when used in low doses. Simultaneously, the IV + AS group outperformed the IV group in terms of clinical response rate, clinical cure rate, microbiological eradication and duration of mechanical ventilation. The duration of hospitalisation and the incidence of nephrotoxicity did not differ significantly between the two groups. Conclusions IV + AS polymyxin is beneficial in the treatment of MDR-GNB pneumonia. It could lower patient mortality and improve clinical and microbial outcomes without increasing the risk of nephrotoxicity. However, retrospective analysis in the majority of studies and heterogeneity between studies implies that our findings must be interpreted carefully.
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Affiliation(s)
- Difan Lu
- Cardiovascular Ultrasound Center of the First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, 310000, Zhejiang, China
| | - Wenchao Mao
- Department of Critical Care Medicine, Zhejiang Hospital, Lingyin Road 12, Hangzhou, 310013, Zhejiang, China
- Corresponding author.
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How to Use Nebulized Antibiotics in Severe Respiratory Infections. Antibiotics (Basel) 2023; 12:antibiotics12020267. [PMID: 36830177 PMCID: PMC9952454 DOI: 10.3390/antibiotics12020267] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 01/18/2023] [Accepted: 01/19/2023] [Indexed: 01/31/2023] Open
Abstract
Difficult-to-treat pulmonary infections caused by multidrug-resistant (MDR) pathogens are of great concern because their incidence continues to increase worldwide and they are associated with high morbidity and mortality. Nebulized antibiotics are increasingly being used in this context. The advantages of the administration of a nebulized antibiotic in respiratory tract infections due to MDR include the potential to deliver higher drug concentrations to the site of infection, thus minimizing the systemic adverse effects observed with the use of parenteral or oral antibiotic agents. However, there is an inconsistency between the large amount of experimental evidence supporting the administration of nebulized antibiotics and the paucity of clinical studies confirming the efficacy and safety of these drugs. In this narrative review, we describe the current evidence on the use of nebulized antibiotics for the treatment of severe respiratory infections.
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Liu J, Shao M, Xu Q, Liu F, Pan X, Wu J, Xiong L, Wu Y, Tian M, Yao J, Huang S, Zhang L, Chen Y, Zhang S, Wen Z, Du H, TaoWang, Liu Y, Li W, Xu Y, Teboul JL, Chen D. Low-dose intravenous plus inhaled versus intravenous polymyxin B for the treatment of extensive drug-resistant Gram-negative ventilator-associated pneumonia in the critical illnesses: a multi-center matched case-control study. Ann Intensive Care 2022; 12:72. [PMID: 35934730 PMCID: PMC9357592 DOI: 10.1186/s13613-022-01033-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Accepted: 06/11/2022] [Indexed: 12/14/2022] Open
Abstract
Background The mortality of extensively drug-resistant Gram-negative (XDR GN) bacilli-induced ventilator-associated pneumonia (VAP) is extremely high. The purpose of this study was to compare the efficacy and safety of inhaled (IH) plus intravenous (IV) polymyxin B versus IV polymyxin B in XDR GN bacilli VAP patients. Methods A retrospective multi-center observational cohort study was performed at eight ICUs between January 1st 2018, and January 1st 2020 in China. Data from all patients treated with polymyxin B for a microbiologically confirmed VAP were analyzed. The primary endpoint was the clinical cure of VAP. The favorable clinical outcome, microbiological outcome, VAP-related mortality and all-cause mortality during hospitalization, and side effects related with polymyxin B were secondary endpoints. Favorable clinical outcome included clinical cure or clinical improvement. Results 151 patients and 46 patients were treated with IV polymyxin B and IH plus IV polymyxin B, respectively. XDR Klebsiella pneumoniae was the main isolated pathogen (n = 83, 42.1%). After matching on age (± 5 years), gender, septic shock, and Apache II score (± 4 points) when polymyxin B was started, 132 patients were included. 44 patients received simultaneous IH plus IV polymyxin B and 88 patients received IV polymyxin B. The rates of clinical cure (43.2% vs 27.3%, p = 0.066), bacterial eradication (36.4% vs 23.9%, p = 0.132) as well as VAP-related mortality (27.3% vs 34.1%, p = 0.428), all-cause mortality (34.1% vs 42.0%, p = 0.378) did not show any significant difference between the two groups. However, IH plus IV polymyxin B therapy was associated with improved favorable clinical outcome (77.3% vs 58.0%, p = 0.029). Patients in the different subgroups (admitted with medical etiology, infected with XDR K. pneumoniae, without bacteremia, with immunosuppressive status) were with odd ratios (ORs) in favor of the combined therapy. No patient required polymyxin B discontinuation due to adverse events. Additional use of IH polymyxin B (aOR 2.63, 95% CI 1.06, 6.66, p = 0.037) was an independent factor associated with favorable clinical outcome. Conclusions The addition of low-dose IH polymyxin B to low-dose IV polymyxin B did not provide efficient clinical cure and bacterial eradication in VAP caused by XDR GN bacilli. Keypoints Additional use of IH polymyxin B was the sole independent risk factor of favorable clinical outcome. Patients in the different subgroups were with HRs substantially favoring additional use of IH polymyxin B. No patients required polymyxin B discontinuation due to adverse events. Supplementary Information The online version contains supplementary material available at 10.1186/s13613-022-01033-5.
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Affiliation(s)
- Jiao Liu
- Department of Critical Care Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No.197 Ruijin 2nd Road, Shanghai, 201801, China
| | - Min Shao
- Department of Critical Care Medicine, The First Affiliated Hospital of Anhui Medical University, Hefei, 230022, China
| | - Qianghong Xu
- Department of Critical Care Medicine, Zhejiang Hospital, No.12 Lingyin Road, HangZhou, 310015, China
| | - Fen Liu
- Department of Critical Care Medicine, the First Affiliated Hospital of Nanchang University, No.17, YongwaiZheng Street, Nanchang, 330006, Jiangxi, China
| | - Xiaojun Pan
- Department of Critical Care Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No.197 Ruijin 2nd Road, Shanghai, 201801, China
| | - Jianfeng Wu
- Department of Critical Care Medicine, The First Affiliated Hospital, Sun Yat-Sen University, No. 58 Zhongshan Er Road, Guangzhou, 510010, China
| | - Lihong Xiong
- Department of Intensive Care Unit, The Second People's Hospital of Shenzhen, Futian District, Sungang West Road, Shenzhen, 3002518035, China
| | - Yueming Wu
- Emergency and Critical Care Center, Lishui People's Hospital, No. 15 Dazhong Road, Lishui, 323000, China
| | - Mi Tian
- Department of Intensive Care Unit, Huashan Hospital, Fudan University, No. 12 Middle Urumqi Road, Shanghai, 200040, China
| | - Jianying Yao
- Department of Intensive Care Unit, The First People's Hospital of KunShan, No 91, Qianjin Road, KunShan, 215300, China
| | - Sisi Huang
- Department of Critical Care Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No.197 Ruijin 2nd Road, Shanghai, 201801, China
| | - Lidi Zhang
- Department of Critical Care Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No.197 Ruijin 2nd Road, Shanghai, 201801, China
| | - Yizhu Chen
- Department of Critical Care Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No.197 Ruijin 2nd Road, Shanghai, 201801, China
| | - Sheng Zhang
- Department of Critical Care Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No.197 Ruijin 2nd Road, Shanghai, 201801, China
| | - Zhenliang Wen
- Department of Critical Care Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No.197 Ruijin 2nd Road, Shanghai, 201801, China
| | - Hangxiang Du
- Department of Critical Care Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No.197 Ruijin 2nd Road, Shanghai, 201801, China
| | - TaoWang
- Department of Critical Care Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No.197 Ruijin 2nd Road, Shanghai, 201801, China
| | - Yongan Liu
- Department of Critical Care Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No.197 Ruijin 2nd Road, Shanghai, 201801, China
| | - Wenzhe Li
- Department of Critical Care Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No.197 Ruijin 2nd Road, Shanghai, 201801, China
| | - Yan Xu
- Department of Critical Care Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No.197 Ruijin 2nd Road, Shanghai, 201801, China
| | - Jean-Louis Teboul
- Service de Médecine-Intensive Réanimation, Hôpital Bicêtre, AP-HP. Université Paris-Saclay, Inserm UMR 999, Université Paris-Saclay, 94270, Le Kremlin-Bicêtre, France
| | - Dechang Chen
- Department of Critical Care Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No.197 Ruijin 2nd Road, Shanghai, 201801, China.
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Tamma PD, Aitken SL, Bonomo RA, Mathers AJ, van Duin D, Clancy CJ. Infectious Diseases Society of America 2022 Guidance on the Treatment of Extended-Spectrum β-lactamase Producing Enterobacterales (ESBL-E), Carbapenem-Resistant Enterobacterales (CRE), and Pseudomonas aeruginosa with Difficult-to-Treat Resistance (DTR-P. aeruginosa). Clin Infect Dis 2022; 75:187-212. [PMID: 35439291 PMCID: PMC9890506 DOI: 10.1093/cid/ciac268] [Citation(s) in RCA: 205] [Impact Index Per Article: 102.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Accepted: 04/04/2022] [Indexed: 02/04/2023] Open
Abstract
BACKGROUND The Infectious Diseases Society of America (IDSA) is committed to providing up-to-date guidance on the treatment of antimicrobial-resistant infections. The initial guidance document on infections caused by extended-spectrum β-lactamase producing Enterobacterales (ESBL-E), carbapenem-resistant Enterobacterales (CRE), and Pseudomonas aeruginosa with difficult-to-treat resistance (DTR-P. aeruginosa) was published on 17 September 2020. Over the past year, there have been a number of important publications furthering our understanding of the management of ESBL-E, CRE, and DTR-P. aeruginosa infections, prompting a rereview of the literature and this updated guidance document. METHODS A panel of 6 infectious diseases specialists with expertise in managing antimicrobial-resistant infections reviewed, updated, and expanded previously developed questions and recommendations about the treatment of ESBL-E, CRE, and DTR-P. aeruginosa infections. Because of differences in the epidemiology of resistance and availability of specific anti-infectives internationally, this document focuses on the treatment of infections in the United States. RESULTS Preferred and alternative treatment recommendations are provided with accompanying rationales, assuming the causative organism has been identified and antibiotic susceptibility results are known. Approaches to empiric treatment, duration of therapy, and other management considerations are also discussed briefly. Recommendations apply for both adult and pediatric populations. CONCLUSIONS The field of antimicrobial resistance is highly dynamic. Consultation with an infectious diseases specialist is recommended for the treatment of antimicrobial-resistant infections. This document is current as of 24 October 2021. The most current versions of IDSA documents, including dates of publication, are available at www.idsociety.org/practice-guideline/amr-guidance/.
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Affiliation(s)
- Pranita D Tamma
- Correspondence: P. D. Tamma, Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, MD, USA ()
| | - Samuel L Aitken
- Department of Pharmacy, University of Michigan Health, Ann Arbor, Michigan, USA
| | - Robert A Bonomo
- Medical Service and Center for Antimicrobial Resistance and Epidemiology, Louis Stokes Cleveland Veterans Affairs Medical Center, University Hospitals Cleveland Medical Center and Departments of Medicine, Pharmacology, Molecular Biology, and Microbiology, Case Western Reserve University, Cleveland, Ohio, USA
| | - Amy J Mathers
- Departments of Medicine and Pathology, University of Virginia, Charlottesville, Virginia, USA
| | - David van Duin
- Department of Medicine, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA
| | - Cornelius J Clancy
- Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
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Dosing Colistimethate Every 8 h Results in Higher Plasma Concentrations of Active Colistin Than Every 12-Hourly Dosing without Increase in Nephrotoxicity: A Phase 1 Pharmacokinetics Trial in Healthy Adult Volunteers. Antibiotics (Basel) 2022; 11:antibiotics11040490. [PMID: 35453240 PMCID: PMC9029538 DOI: 10.3390/antibiotics11040490] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 04/02/2022] [Accepted: 04/05/2022] [Indexed: 12/04/2022] Open
Abstract
Despite its use for decades, pharmacokinetic (PK) and safety studies on colistin are limited. We conducted a phase l, open-label trial to evaluate the safety and PK of multiple doses of intravenous (IV) and aerosolized colistimethate sodium (CMS) administered separately and in combination. In total, 31 healthy adults were enrolled into three cohorts of 9, 10, and 12 participants, respectively. Each cohort received increasing doses of CMS over three dosing periods as follows: Period 1 (IV only), 2.5 mg/kg every 12 h (q12h) to 3.3 mg/kg every 8 h (q8h); Period 2 (aerosolized only), 75 mg 2–4 doses, and Period 3 (combined IV aerosolized), in which was Periods 1 and 2 combined. Safety assessments, serum and lung concentrations of colistin analytes (colistin A, colistin B, CMS A, and CMS B), and kidney biomarkers were measured at specified time points. Increasing the CMS dose from 2.5 mg/kg q12h to q8h resulted in a 33% increase in serum colistin A concentrations from 3.9 μg/mL to 5.3 μg/mL—well above the accepted target of 2 μg/mL for 6 h after dosing, without evidence of nephrotoxicity. However, there was an increase in neurotoxicity, primarily perioral and lingual paresthesias, and self-limited ataxia. IV administration did not increase the lung concentrations of colistin.
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Polymyxin Induces Significant Transcriptomic Perturbations of Cellular Signalling Networks in Human Lung Epithelial Cells. Antibiotics (Basel) 2022; 11:antibiotics11030307. [PMID: 35326770 PMCID: PMC8944768 DOI: 10.3390/antibiotics11030307] [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: 01/27/2022] [Revised: 02/20/2022] [Accepted: 02/21/2022] [Indexed: 02/06/2023] Open
Abstract
Inhaled polymyxins are increasingly used to treat pulmonary infections caused by multidrug-resistant Gram-negative pathogens. We have previously shown that apoptotic pathways, autophagy and oxidative stress are involved in polymyxin-induced toxicity in human lung epithelial cells. In the present study, we employed human lung epithelial cells A549 treated with polymyxin B as a model to elucidate the complex interplay of multiple signalling networks underpinning cellular responses to polymyxin toxicity. Polymyxin B induced toxicity (1.0 mM, 24 h) in A549 cells was assessed by flow cytometry and transcriptomics was performed using microarray. Polymyxin B induced cell death was 19.0 ± 4.2% at 24 h. Differentially expressed genes (DEGs) between the control and polymyxin B treated cells were identified with Student’s t-test. Pathway analysis was conducted with KEGG and Reactome and key hub genes related to polymyxin B induced toxicity were examined using the STRING database. In total we identified 899 DEGs (FDR < 0.01), KEGG and Reactome pathway analyses revealed significantly up-regulated genes related to cell cycle, DNA repair and DNA replication. NF-κB and nucleotide-binding oligomerization domain-like receptor (NOD) signalling pathways were identified as markedly down-regulated genes. Network analysis revealed the top 5 hub genes (i.e., degree) affected by polymyxin B treatment were PLK1(48), CDK20 (46), CCNA2 (42), BUB1 (40) and BUB1B (37). Overall, perturbations of cell cycle, DNA damage and pro-inflammatory NF-κB and NOD-like receptor signalling pathways play key roles in polymyxin-induced toxicity in human lung epithelial cells. Noting that NOD-like receptor signalling represents a group of key sensors for microorganisms and damage in the lung, understanding the mechanism of polymyxin-induced pulmonary toxicity will facilitate the optimisation of polymyxin inhalation therapy in patients.
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Jung YJ, Kim EJ, Choi YH. Aerosolized antibiotics in the treatment of hospital-acquired pneumonia/ventilator-associated pneumonia. Korean J Intern Med 2022; 37:1-12. [PMID: 34666432 PMCID: PMC8747925 DOI: 10.3904/kjim.2021.277] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Accepted: 07/22/2021] [Indexed: 01/02/2023] Open
Abstract
Aerosolized antibiotics are being increasingly used to treat respiratory infections, especially those caused by drug-resistant pathogens. Their use in the treatment of hospital-acquired pneumonia and ventilator-associated pneumonia in critically ill patients is especially significant. They are also used as an efficient alternative to overcome the issues caused by systemic administration of antibiotics, including the occurrence of drug-resistant strains, drug toxicity, and insufficient drug concentration at the target site. However, the rationale for the use of aerosolized antibiotics is limited owing to their insufficient efficacy and the potential for underestimated risks of developing side effects. Despite the lack of availability of high-quality evidence, the use of aerosolized antibiotics is considered as an attractive alternative treatment approach, especially in patients with multidrug-resistant pathogens. In this review, we have discussed the effectiveness and side effects of aerosolized antibiotics as well as the latest advancements in this field and usage in the Republic of Korea.
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Affiliation(s)
- Yun Jung Jung
- Department of Pulmonary and Critical Care Medicine, Ajou University School of Medicine, Suwon, Korea
| | - Eun Jin Kim
- Department of Infectious Diseases, Ajou University School of Medicine, Suwon,
Korea
| | - Young Hwa Choi
- Department of Infectious Diseases, Ajou University School of Medicine, Suwon,
Korea
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Tamma PD, Aitken SL, Bonomo RA, Mathers AJ, van Duin D, Clancy CJ. Infectious Diseases Society of America Guidance on the Treatment of AmpC β-lactamase-Producing Enterobacterales, Carbapenem-Resistant Acinetobacter baumannii, and Stenotrophomonas maltophilia Infections. Clin Infect Dis 2021; 74:2089-2114. [PMID: 34864936 DOI: 10.1093/cid/ciab1013] [Citation(s) in RCA: 255] [Impact Index Per Article: 85.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND The Infectious Diseases Society of America (IDSA) is committed to providing up-to-date guidance on the treatment of antimicrobial-resistant infections. A previous guidance document focused on infections caused by extended-spectrum β-lactamase-producing Enterobacterales (ESBL-E), carbapenem-resistant Enterobacterales (CRE), and Pseudomonas aeruginosa with difficult-to-treat resistance (DTR-P. aeruginosa). Here, guidance is provided for treating AmpC β-lactamase-producing Enterobacterales (AmpC-E), carbapenem-resistant Acinetobacter baumannii (CRAB), and Stenotrophomonas maltophilia infections. METHODS A panel of six infectious diseases specialists with expertise in managing antimicrobial-resistant infections formulated questions about the treatment of AmpC-E, CRAB, and S. maltophilia infections. Answers are presented as suggestions and corresponding rationales. In contrast to guidance in the previous document, published data on optimal treatment of AmpC-E, CRAB, and S. maltophilia infections are limited. As such, guidance in this document is provided as "suggested approaches" based on clinical experience, expert opinion, and a review of the available literature. Because of differences in the epidemiology of resistance and availability of specific anti-infectives internationally, this document focuses on the treatment of infections in the United States. RESULTS Preferred and alternative treatment suggestions are provided, assuming the causative organism has been identified and antibiotic susceptibility results are known. Approaches to empiric treatment, duration of therapy, and other management considerations are also discussed briefly. Suggestions apply for both adult and pediatric populations. CONCLUSIONS The field of antimicrobial resistance is highly dynamic. Consultation with an infectious diseases specialist is recommended for the treatment of antimicrobial-resistant infections. This document is current as of September 17, 2021 and will be updated annually. The most current versions of IDSA documents, including dates of publication, are available at www.idsociety.org/practice-guideline/amr-guidance-2.0/.
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Affiliation(s)
- Pranita D Tamma
- Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Samuel L Aitken
- Department of Pharmacy, University of Michigan Health, Ann Arbor, Michigan, USA
| | - Robert A Bonomo
- Medical Service, Louis Stokes Cleveland Department of Veterans Affairs Medical Center, University Hospitals Cleveland Medical Center and Departments of Medicine, Pharmacology, Molecular Biology, and Microbiology, Case Western Reserve University, Cleveland, Ohio, USA
| | - Amy J Mathers
- Departments of Medicine and Pathology, University of Virginia, Charlottesville, Virginia, USA
| | - David van Duin
- Department of Medicine, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA
| | - Cornelius J Clancy
- Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
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Polymyxin-Induced Metabolic Perturbations in Human Lung Epithelial Cells. Antimicrob Agents Chemother 2021; 65:e0083521. [PMID: 34228550 DOI: 10.1128/aac.00835-21] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Inhaled polymyxins are associated with toxicity in human lung epithelial cells that involves multiple apoptotic pathways. However, the mechanism of polymyxin-induced pulmonary toxicity remains unclear. This study aims to investigate polymyxin-induced metabolomic perturbations in human lung epithelial A549 cells. A549 cells were treated with 0.5 or 1.0 mM polymyxin B or colistin for 1, 4, and 24 h. Cellular metabolites were analyzed using liquid chromatography-tandem mass spectrometry (LC-MS/MS), and significantly perturbed metabolites (log2 fold change [log2FC] ≥ 1; false-discovery rate [FDR] ≤ 0.2) and key pathways were identified relative to untreated control samples. At 1 and 4 h, very few significant changes in metabolites were observed relative to the untreated control cells. At 24 h, taurine (log2FC = -1.34 ± 0.64) and hypotaurine (log2FC = -1.20 ± 0.27) were significantly decreased by 1.0 mM polymyxin B. The reduced form of glutathione (GSH) was significantly depleted by 1.0 mM polymyxin B at 24 h (log2FC = -1.80 ± 0.42). Conversely, oxidized glutathione (GSSG) was significantly increased by 1.0 mM both polymyxin B (log2FC = 1.38 ± 0.13 at 4 h and 2.09 ± 0.20 at 24 h) and colistin (log2FC = 1.33 ± 0.24 at 24 h). l-Carnitine was significantly decreased by 1.0 mM of both polymyxins at 24 h, as were several key metabolites involved in biosynthesis and degradation of choline and ethanolamine (log2FC ≤ -1); several phosphatidylserines were also increased (log2FC ≥ 1). Polymyxins perturbed key metabolic pathways that maintain cellular redox balance, mitochondrial β-oxidation, and membrane lipid biogenesis. These mechanistic findings may assist in developing new pharmacokinetic/pharmacodynamic strategies to attenuate the pulmonary toxicities of inhaled polymyxins and in the discovery of new-generation polymyxins.
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Nebulized Colistin in Ventilator-Associated Pneumonia and Tracheobronchitis: Historical Background, Pharmacokinetics and Perspectives. Microorganisms 2021; 9:microorganisms9061154. [PMID: 34072189 PMCID: PMC8227626 DOI: 10.3390/microorganisms9061154] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2021] [Revised: 05/14/2021] [Accepted: 05/20/2021] [Indexed: 11/17/2022] Open
Abstract
Clinical evidence suggests that nebulized colistimethate sodium (CMS) has benefits for treating lower respiratory tract infections caused by multidrug-resistant Gram-negative bacteria (GNB). Colistin is positively charged, while CMS is negatively charged, and both have a high molecular mass and are hydrophilic. These physico-chemical characteristics impair crossing of the alveolo-capillary membrane but enable the disruption of the bacterial wall of GNB and the aggregation of the circulating lipopolysaccharide. Intravenous CMS is rapidly cleared by glomerular filtration and tubular excretion, and 20-25% is spontaneously hydrolyzed to colistin. Urine colistin is substantially reabsorbed by tubular cells and eliminated by biliary excretion. Colistin is a concentration-dependent antibiotic with post-antibiotic and inoculum effects. As CMS conversion to colistin is slower than its renal clearance, intravenous administration can lead to low plasma and lung colistin concentrations that risk treatment failure. Following nebulization of high doses, colistin (200,000 international units/24h) lung tissue concentrations are > five times minimum inhibitory concentration (MIC) of GNB in regions with multiple foci of bronchopneumonia and in the range of MIC breakpoints in regions with confluent pneumonia. Future research should include: (1) experimental studies using lung microdialysis to assess the PK/PD in the interstitial fluid of the lung following nebulization of high doses of colistin; (2) superiority multicenter randomized controlled trials comparing nebulized and intravenous CMS in patients with pandrug-resistant GNB ventilator-associated pneumonia and ventilator-associated tracheobronchitis; (3) non-inferiority multicenter randomized controlled trials comparing nebulized CMS to intravenous new cephalosporines/ß-lactamase inhibitors in patients with extensive drug-resistant GNB ventilator-associated pneumonia and ventilator-associated tracheobronchitis.
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Synchrotron-based X-ray fluorescence microscopy reveals accumulation of polymyxins in single human alveolar epithelial cells. Antimicrob Agents Chemother 2021; 65:AAC.02314-20. [PMID: 33649114 PMCID: PMC8092916 DOI: 10.1128/aac.02314-20] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Intravenous administration of the last-line polymyxins results in poor drug exposure in the lungs and potential nephrotoxicity; while inhalation therapy offers better pharmacokinetics/pharmacodynamics for pulmonary infections by delivering the antibiotic to the infection site directly. However, polymyxin inhalation therapy has not been optimized and adverse effects can occur. This study aimed to quantitatively determine the intracellular accumulation and distribution of polymyxins in single human alveolar epithelial A549 cells. Cells were treated with an iodine-labeled polymyxin probe FADDI-096 (5.0 and 10.0 μM) for 1, 4, and 24 h. Concentrations of FADDI-096 in single A549 cells were determined by synchrotron-based X-ray fluorescence microscopy. Concentration- and time-dependent accumulation of FADDI-096 within A549 cells was observed. The intracellular concentrations (mean ± SEM, n ≥ 189) of FADDI-096 were 1.58 ± 0.11, 2.25 ± 0.10, and 2.46 ± 0.07 mM following 1, 4 and 24 h of treatment at 10 μM, respectively. The corresponding intracellular concentrations following the treatment at 5 μM were 0.05 ± 0.01, 0.24 ± 0.04, and 0.25 ± 0.02 mM (n ≥ 189). FADDI-096 was mainly localized throughout the cytoplasm and nuclear region over 24 h. The intracellular zinc concentration increased in a concentration- and time-dependent manner. This is the first study to quantitatively map the accumulation of polymyxins in human alveolar epithelial cells and provides crucial insights for deciphering the mechanisms of their pulmonary toxicity. Importantly, our results may shed light on the optimization of inhaled polymyxins in patients and the development of new-generation safer polymyxins.
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Almangour TA, Garcia E, Zhou Q, Forrest A, Kaye KS, Li J, Velkov T, Rao GG. Polymyxins for the treatment of lower respiratory tract infections: lessons learned from the integration of clinical pharmacokinetic studies and clinical outcomes. Int J Antimicrob Agents 2021; 57:106328. [PMID: 33785362 DOI: 10.1016/j.ijantimicag.2021.106328] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 02/18/2021] [Accepted: 03/20/2021] [Indexed: 11/26/2022]
Abstract
The global rise in nosocomial pneumonia caused by multidrug-resistant (MDR) Gram-negative pathogens and the increasingly limited antibiotic treatment options are growing threats to modern medicine. As a result, older antibiotics such as polymyxins are being used as last-resort drugs for MDR nosocomial pneumonia. Polymyxins are bactericidal against most aerobic Gram-negative bacilli. High-dose intravenous (IV) adminsitration of polymyxins, however, results in subtherapeutic concentrations at the site of infection making treatment challenging. Alternative forms of polymyxin delivery have been considered in order to better achieve the necessary concentrations at the site of infection. Several studies have evaluated the effectiveness of aerosolised polymyxins in patients with nosocomial pneumonia caused by MDR Gram-negative pathogens such as Pseudomonas aeruginosa, Acinetobacter baumannii and Klebsiella pneumoniae. Here we evaluated the pharmacokinetic data supporting the use of inhaled polymyxins in nosocomial pneumonia and provide insight into the limitations and challenges that future studies should address. We have also reviewed the literature published between 2006 and 2020 on the use of aerosolised polymyxins for the treatment of nosocomial pneumonia, including ventilator-associated pneumonia, in patients without cystic fibrosis to evaluate their safety and efficacy as monotherapy or as an adjunct to IV antimicrobials. This review highlights the need for well-designed multicentre studies with standardised methodologies to further evaluate the effectiveness of inhaled polymyxins and to provide reliable pharmacokinetic/pharmacodynamic data in order to redefine appropriate dosing strategies.
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Affiliation(s)
- Thamer A Almangour
- Department of Pharmacotherapy and Experimental Therapeutics, University of North Carolina at Chapel Hill, Eshelman School of Pharmacy, Chapel Hill, North Carolina, USA; Department of Clinical Pharmacy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Estefany Garcia
- Department of Pharmacotherapy and Experimental Therapeutics, University of North Carolina at Chapel Hill, Eshelman School of Pharmacy, Chapel Hill, North Carolina, USA
| | - Qi Zhou
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, West Lafayette, Indiana, USA
| | - Alan Forrest
- Department of Pharmacotherapy and Experimental Therapeutics, University of North Carolina at Chapel Hill, Eshelman School of Pharmacy, Chapel Hill, North Carolina, USA
| | - Keith S Kaye
- Department of Medicine, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Jian Li
- Monash Biomedicine Discovery Institute, Department of Microbiology, Monash University, Melbourne, Victoria, Australia
| | - Tony Velkov
- Department of Pharmacology and Therapeutics, The University of Melbourne, Melbourne, Victoria, Australia
| | - Gauri G Rao
- Department of Pharmacotherapy and Experimental Therapeutics, University of North Carolina at Chapel Hill, Eshelman School of Pharmacy, Chapel Hill, North Carolina, USA.
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Wagenlehner F, Lucenteforte E, Pea F, Soriano A, Tavoschi L, Steele VR, Henriksen AS, Longshaw C, Manissero D, Pecini R, Pogue JM. Systematic review on estimated rates of nephrotoxicity and neurotoxicity in patients treated with polymyxins. Clin Microbiol Infect 2021; 27:S1198-743X(20)30764-3. [PMID: 33359542 DOI: 10.1016/j.cmi.2020.12.009] [Citation(s) in RCA: 60] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 11/03/2020] [Accepted: 12/10/2020] [Indexed: 12/27/2022]
Abstract
BACKGROUND Nephrotoxicity and neurotoxicity are commonly associated with polymyxin treatment; however, the emergence of multidrug-resistant Gram-negative bacteria with limited therapeutic options has resulted in increased use of polymyxins. OBJECTIVES To determine the rates of nephrotoxicity and neurotoxicity during polymyxin treatment and whether any factors influence these. DATA SOURCES Medline, Embase and Cochrane Library databases were searched on 2 January 2020. STUDY ELIGIBILITY CRITERIA Studies reporting nephrotoxicity and/or neurotoxicity rates in patients with infections treated with polymyxins were included. Reviews, meta-analyses and reports not in English were excluded. PARTICIPANTS Patients hospitalized with infections treated with systemic or inhaled polymyxins were included. For comparative analyses, patients treated with non-polymyxin-based regimens were also included. METHODS Meta-analyses were performed using a random-effects model; subgroup meta-analyses were conducted where data permitted using a mixed-effects model. RESULTS In total, 237 reports of randomized controlled trials, cohort and case-control studies were eligible for inclusion; most were single-arm observational studies. Nephrotoxic events in 35,569 patients receiving polymyxins were analysed. Overall nephrotoxicity rate was 0.282 (95% confidence interval (CI) 0.259-0.307). When excluding studies where >50% of patients received inhaled-only polymyxin treatment or nephrotoxicity assessment was by methods other than internationally recognized criteria (RIFLE, KDIGO or AKIN), the nephrotoxicity rate was 0.391 (95% CI 0.364-0.419). The odds of nephrotoxicity were greater with polymyxin therapies compared to non-polymyxin-based regimens (odds ratio 2.23 (95% CI 1.58-3.15); p < 0.001). Meta-analyses showed a significant effect of polymyxin type, dose, patient age, number of concomitant nephrotoxins and use of diuretics, glycopeptides or vasopressors on the rate of nephrotoxicity. Polymyxin therapies were not associated with a significantly different rate of neurotoxicity than non-polymyxin-based regimens (p 0.051). The overall rate of neurotoxicity during polymyxin therapy was 0.030 (95% CI 0.020-0.043). CONCLUSIONS Polymyxins are associated with a higher risk of nephrotoxicity than non-polymyxin-based regimens.
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Affiliation(s)
- Florian Wagenlehner
- Clinic for Urology, Pediatric Urology and Andrology, Justus-Liebig-University, Giessen, Germany
| | - Ersilia Lucenteforte
- Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
| | - Federico Pea
- Department of Medicine, University of Udine and Institute of Clinical Pharmacology, SM Misericordia University Hospital, ASUIUD, Udine, Italy
| | - Alex Soriano
- Infectious Diseases Department, Hospital Clínic of Barcelona, University of Barcelona IDIBAPS, Barcelona, Spain
| | - Lara Tavoschi
- Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy
| | | | | | | | - Davide Manissero
- University College of London, Institute for Global Health, London, UK
| | | | - Jason M Pogue
- Department of Clinical Pharmacy, University of Michigan College of Pharmacy, Ann Arbor, MI, USA.
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15
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Ahmed MU, Velkov T, Zhou QT, Fulcher AJ, Callaghan J, Zhou F, Chan K, Azad MAK, Li J. Intracellular localization of polymyxins in human alveolar epithelial cells. J Antimicrob Chemother 2020; 74:48-57. [PMID: 30357331 DOI: 10.1093/jac/dky409] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Accepted: 09/06/2018] [Indexed: 01/05/2023] Open
Abstract
Background Current inhaled polymyxin therapy is empirical and often large doses are administered, which can lead to pulmonary adverse effects. There is a dearth of information on the mechanisms of polymyxin-induced lung toxicity and their intracellular localization in lung epithelial cells. Objectives To investigate the intracellular localization of polymyxins in human lung epithelial A549 cells. Methods A549 cells were treated with polymyxin B and intracellular organelles (early and late endosomes, endoplasmic reticulum, mitochondria, lysosomes and autophagosomes), ubiquitin protein and polymyxin B were visualized using immunostaining and confocal microscopy. Fluorescence intensities of the organelles and polymyxin B were quantified and correlated for co-localization using ImageJ and Imaris platforms. Results Polymyxin B co-localized with early endosomes, lysosomes and ubiquitin at 24 h. Significantly increased lysosomal activity and the autophagic protein LC3A were observed after 0.5 and 1.0 mM polymyxin B treatment at 24 h. Polymyxin B also significantly co-localized with mitochondria (Pearson's R = 0.45) and led to the alteration of mitochondrial morphology from filamentous to fragmented form (n = 3, P < 0.001). These results are in line with the polymyxin-induced activation of the mitochondrial apoptotic pathway observed in A549 cells. Conclusions Accumulation of polymyxins on mitochondria probably caused mitochondrial toxicity, resulting in increased oxidative stress and cell death. The formation of autophagosomes and lysosomes was likely a cellular response to the polymyxin-induced stress and played a defensive role by disassembling dysfunctional organelles and proteins. Our study provides new mechanistic information on polymyxin-induced lung toxicity, which is vital for optimizing inhaled polymyxins in the clinic.
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Affiliation(s)
- Maizbha U Ahmed
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria, Australia.,Monash Biomedicine Discovery Institute, Department of Microbiology, Monash University, Victoria, Australia
| | - Tony Velkov
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria, Australia
| | - Qi Tony Zhou
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, West Lafayette, IN, USA
| | - Alex J Fulcher
- Monash Micro Imaging, Monash University, Victoria, Australia
| | - Judy Callaghan
- Monash Micro Imaging, Monash University, Victoria, Australia
| | - Fanfan Zhou
- School of Pharmacy, The University of Sydney, Camperdown, NSW, Australia
| | - Kim Chan
- School of Pharmacy, The University of Sydney, Camperdown, NSW, Australia
| | - Mohammad A K Azad
- Monash Biomedicine Discovery Institute, Department of Microbiology, Monash University, Victoria, Australia
| | - Jian Li
- Monash Biomedicine Discovery Institute, Department of Microbiology, Monash University, Victoria, Australia
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16
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Horcajada JP, Montero M, Oliver A, Sorlí L, Luque S, Gómez-Zorrilla S, Benito N, Grau S. Epidemiology and Treatment of Multidrug-Resistant and Extensively Drug-Resistant Pseudomonas aeruginosa Infections. Clin Microbiol Rev 2019; 32:32/4/e00031-19. [PMID: 31462403 PMCID: PMC6730496 DOI: 10.1128/cmr.00031-19] [Citation(s) in RCA: 439] [Impact Index Per Article: 87.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
In recent years, the worldwide spread of the so-called high-risk clones of multidrug-resistant or extensively drug-resistant (MDR/XDR) Pseudomonas aeruginosa has become a public health threat. This article reviews their mechanisms of resistance, epidemiology, and clinical impact and current and upcoming therapeutic options. In vitro and in vivo treatment studies and pharmacokinetic and pharmacodynamic (PK/PD) models are discussed. Polymyxins are reviewed as an important therapeutic option, outlining dosage, pharmacokinetics and pharmacodynamics, and their clinical efficacy against MDR/XDR P. aeruginosa infections. Their narrow therapeutic window and potential for combination therapy are also discussed. Other "old" antimicrobials, such as certain β-lactams, aminoglycosides, and fosfomycin, are reviewed here. New antipseudomonals, as well as those in the pipeline, are also reviewed. Ceftolozane-tazobactam has clinical activity against a significant percentage of MDR/XDR P. aeruginosa strains, and its microbiological and clinical data, as well as recommendations for improving its use against these bacteria, are described, as are those for ceftazidime-avibactam, which has better activity against MDR/XDR P. aeruginosa, especially strains with certain specific mechanisms of resistance. A section is devoted to reviewing upcoming active drugs such as imipenem-relebactam, cefepime-zidebactam, cefiderocol, and murepavadin. Finally, other therapeutic strategies, such as use of vaccines, antibodies, bacteriocins, anti-quorum sensing, and bacteriophages, are described as future options.
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Affiliation(s)
- Juan P Horcajada
- Service of Infectious Diseases, Hospital del Mar, Infectious Pathology and Antimicrobials Research Group, Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), Universitat Autònoma de Barcelona, Barcelona, Spain
- Spanish Network for Research in Infectious Diseases (REIPI), Madrid, Spain
| | - Milagro Montero
- Service of Infectious Diseases, Hospital del Mar, Infectious Pathology and Antimicrobials Research Group, Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), Universitat Autònoma de Barcelona, Barcelona, Spain
- Spanish Network for Research in Infectious Diseases (REIPI), Madrid, Spain
| | - Antonio Oliver
- Service of Microbiology, Hospital Son Espases, Instituto de Investigación Sanitaria Illes Balears (IdISBa), Palma de Mallorca, Spain
| | - Luisa Sorlí
- Service of Infectious Diseases, Hospital del Mar, Infectious Pathology and Antimicrobials Research Group, Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), Universitat Pompeu Fabra, Barcelona, Spain
- Spanish Network for Research in Infectious Diseases (REIPI), Madrid, Spain
| | - Sònia Luque
- Service of Pharmacy, Hospital del Mar, Infectious Pathology and Antimicrobials Research Group, Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Silvia Gómez-Zorrilla
- Service of Infectious Diseases, Hospital del Mar, Infectious Pathology and Antimicrobials Research Group, Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), Universitat Pompeu Fabra, Barcelona, Spain
- Spanish Network for Research in Infectious Diseases (REIPI), Madrid, Spain
| | - Natividad Benito
- Infectious Diseases Unit, Hospital de la Santa Creu i Sant Pau, Institut d'Investigació Biomèdica Sant Pau, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Santiago Grau
- Service of Pharmacy, Hospital del Mar, Infectious Pathology and Antimicrobials Research Group, Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), Universitat Autònoma de Barcelona, Barcelona, Spain
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17
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Paul M, Zusman O, Leibovici L. Meta-analysis of Polymyxin Use in Patients. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1145:143-153. [PMID: 31364077 DOI: 10.1007/978-3-030-16373-0_11] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
In this chapter, we systematically reviewed studies that assessed polymyxin's effectiveness and summarized results through meta-analysis. The outcomes addressed were all-cause mortality, assuming that for patients with severe multidrug-resistant infections survival is the most important outcome, and resistance development, important for future patients. Most clinical data on polymyxins in the literature are from retrospective, observational studies at high risk of bias. The majority of clinical studies were unpowered to examine mortality controlling for other risk factors. The studies had no control of dosage regimens and treatment modifications. We identified several areas of missing data, in particular randomized controlled trials (RCTs) examining treatment options for carbapenem-resistant Gram-negative bacteria, different dosage regimens, polymyxins versus alternative antibiotics (e.g. aminoglycosides, tigecycline), and monotherapy versus specific combination therapies. Ideally, mortality and development of resistance should be examined in RCTs, with further longitudinal studies required for the latter.
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Affiliation(s)
- Mical Paul
- Division of Infectious Diseases, Rambam Health Care Center and The Ruth and Bruce Rappaport Faculty of Medicine, Technion - Israel Institute of Technology, Haifa, Israel.
| | - Oren Zusman
- Medicine E, Rabin Medical Center, Beilinson Hospital, Petah Tikva and Sackler Faculty of Medicine, Tel-Aviv University, Ramat Aviv, Tel Aviv, Israel
| | - Leonard Leibovici
- Medicine E, Rabin Medical Center, Beilinson Hospital, Petah Tikva and Sackler Faculty of Medicine, Tel-Aviv University, Ramat Aviv, Tel Aviv, Israel
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18
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Pouch SM, Patel G. Multidrug-resistant Gram-negative bacterial infections in solid organ transplant recipients-Guidelines from the American Society of Transplantation Infectious Diseases Community of Practice. Clin Transplant 2019; 33:e13594. [PMID: 31102483 DOI: 10.1111/ctr.13594] [Citation(s) in RCA: 75] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Accepted: 05/11/2019] [Indexed: 12/11/2022]
Abstract
These updated guidelines from the Infectious Diseases Community of Practice of the American Society of Transplantation review the diagnosis, prevention, and management of infections due to multidrug-resistant (MDR) Gram-negative bacilli in the pre- and post-transplant period. MDR Gram-negative bacilli, including carbapenem-resistant Enterobacteriaceae, MDR Pseudomonas aeruginosa, and carbapenem-resistant Acinetobacter baumannii, remain a threat to successful organ transplantation. Clinicians now have access to at least five novel agents with activity against some of these organisms, with others in the advanced stages of clinical development. No agent, however, provides universal and predictable activity against any of these pathogens, and very little is available to treat infections with MDR nonfermenting Gram-negative bacilli including A baumannii. Despite advances, empiric antibiotics should be tailored to local microbiology and targeted regimens should be tailored to susceptibilities. Source control remains an important part of the therapeutic armamentarium. Morbidity and mortality associated with infections due to MDR Gram-negative organisms remain unacceptably high. Heightened infection control and antimicrobial stewardship initiatives are needed to prevent these infections, curtail their transmission, and limit the evolution of MDR Gram-negative pathogens, especially in the setting of organ transplantation.
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Affiliation(s)
| | - Gopi Patel
- Icahn School of Medicine at Mount Sinai, New York, New York
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A Breath of Fresh Air in the Fog of Antimicrobial Resistance: Inhaled Polymyxins for Gram-Negative Pneumonia. Antibiotics (Basel) 2019; 8:antibiotics8010027. [PMID: 30884839 PMCID: PMC6466860 DOI: 10.3390/antibiotics8010027] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 03/08/2019] [Accepted: 03/12/2019] [Indexed: 01/08/2023] Open
Abstract
Despite advancements in therapy, pneumonia remains the leading cause of death due to infectious diseases. Novel treatment strategies are desperately needed to optimize the antimicrobial therapy of patients suffering from this disease. One such strategy that has recently garnered significant attention is the use of inhaled antibiotics to rapidly achieve therapeutic concentrations directly at the site of infection. In particular, there is significant interest in the role of inhaled polymyxins for the treatment of nosocomial pneumonia, including ventilator-associated pneumonia, due to their retained activity against multi-drug resistant Gram-negative pathogens, including Acinetobacter baumannii and Pseudomonas aeruginosa. This review will provide a comprehensive overview of the pharmacokinetic/pharmacodynamic profile, clinical outcomes, safety, and potential role of inhaled polymyxins in clinical practice.
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20
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Risk factors of colistin safety according to administration routes: Intravenous and aerosolized colistin. PLoS One 2018; 13:e0207588. [PMID: 30462703 PMCID: PMC6248982 DOI: 10.1371/journal.pone.0207588] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Accepted: 11/03/2018] [Indexed: 11/19/2022] Open
Abstract
Background Nephrotoxicity of intravenous (IV) colistin has impeded its clinical use; aerosolized (AS) colistin may be an alternative, but safety data are lacking. Therefore, this study aimed to evaluate the incidence of acute kidney injury (AKI) and risk factors associated with IV and AS colistin administration. Methods A retrospective study was performed in a tertiary referral hospital. Data were collected before and after colistin administration between October 2012 and April 2016. Exclusion criteria were as follows: age less than 18 years, previous colistin administration, concurrent use of IV and AS colistin, dialysis before colistin use, and colistin use for less than 3 days. We compared AKI incidence following administration of IV versus AS colistin and analyzed risk factors for colistin-associated nephrotoxicity. Results A total of 464 patients were enrolled (n = 311, IV group; n = 153, AS group). Incidence of AKI was significantly higher in the IV group (IV vs AS, 20.26% vs 7.84%, p-value < 0.001). Duration of colistin use (OR 1.033, 95% CI 1.009–1.058, p-value 0.008) and presence of chronic kidney disease (OR 2.710, 95% CI 1.348–5.448, p-value 0.005) were associated with nephrotoxicity. There were no significant risk factors associated with AS colistin. Conclusions Although AS colistin was not associated with any significant risk factors for nephrotoxicity, duration of colistin use and baseline kidney function may affect AS colistin-associated nephrotoxicity.
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Khawcharoenporn T, Chuncharunee A, Maluangnon C, Taweesakulvashra T, Tiamsak P. Active monotherapy and combination therapy for extensively drug-resistant Pseudomonas aeruginosa pneumonia. Int J Antimicrob Agents 2018; 52:828-834. [PMID: 30236956 DOI: 10.1016/j.ijantimicag.2018.09.008] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Revised: 07/24/2018] [Accepted: 09/09/2018] [Indexed: 02/03/2023]
Abstract
Data on treatment regimens and outcomes of extensively drug-resistant Pseudomonas aeruginosa (XDR-PA) pneumonia are currently limited. A 6-year retrospective cohort study of adult patients diagnosed with XDR-PA pneumonia was conducted between January 2011 and December 2016. All XDR-PA isolates were susceptible to colistin and/or fosfomycin alone. Some XDR-PA isolates, which had minimum inhibitory concentrations for doripenem of 4 or 8 mg/L, were considered to be susceptible to 4-h prolonged infusion therapy with high-dose doripenem. Definite treatment regimens were categorized into three groups: inactive therapy, active monotherapy and active combined two-drug therapy. Outcomes were compared between the three groups. In total, 136 patients were included, and 37% had ventilator-associated pneumonia. Twenty-two, 74 and 40 patients received inactive therapy, active monotherapy and active combined two-drug therapy, respectively. Demographic and clinical characteristics were comparable between the three groups. Rates of 28-day survival and microbiological cure were significantly higher in patients who received active combined two-drug therapy compared with those who received active monotherapy and inactive therapy [90% vs 51% vs 0% (P<0.001) and 90% vs 54% vs 0% (P<0.001), respectively]. Kaplan-Meier survival analysis demonstrated a survival benefit of those who received active combined two-drug therapy over those who received active monotherapy and inactive therapy. Predictors for 28-day mortality were no infectious diseases (ID) consultations [adjusted odds ratio (aOR) 10.93; P<0.001], and receipt of inactive therapy (aOR 42.07; P<0.001) or active monotherapy (aOR 6.63; P=0.002) compared with receipt of active combined two-drug therapy. Active combined two-drug therapy was associated with better survival compared with active monotherapy for XDR-PA pneumonia. ID consultation was associated with a reduction in mortality.
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Affiliation(s)
- Thana Khawcharoenporn
- Division of Infectious Diseases, Faculty of Medicine, Thammasat University, Pathumthani, Thailand.
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22
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Vardakas KZ, Mavroudis AD, Georgiou M, Falagas ME. Intravenous plus inhaled versus intravenous colistin monotherapy for lower respiratory tract infections: A systematic review and meta-analysis. J Infect 2018; 76:321-327. [PMID: 29428226 DOI: 10.1016/j.jinf.2018.02.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Accepted: 02/03/2018] [Indexed: 11/19/2022]
Abstract
OBJECTIVE To evaluate whether intravenous plus inhaled combination (IV/INHCC) compared to intravenous monotherapy (IVCM) was associated with patient outcomes and identify factors influencing study outcomes. METHODS PubMed and Scopus were searched till November 2016. Studies were included if they evaluated adult patients with lower respiratory tract infections due to MDR/XDR Gram-negative bacteria and reported comparative mortality data (adjusted and unadjusted) for patients receiving IV/INHCC versus IVCM. Random effects meta-analyses were performed. RESULTS Thirteen studies (11 retrospective, 2 prospective) were included. The overall quality of data was low to very low and characterized by the lack of adjusted data. The majority of the studies were designed to evaluate the outcome of the meta-analysis. Both IV and inhaled colistin were administered at variable doses. There was no difference in mortality between IV/INHCC and IVCM when all studies were combined (13 studies, 1115 patients, risk ratio 0.94, 95% confidence interval 0.81-1.08). Only the analysis that included studies with low-dose IV colistin showed significant difference in favor of IV/INHCC versus IVCM (0.65, 0.45-0.94). CONCLUSIONS Overall, low quality data suggest that IV/INHCC did not lower mortality in patients with MDR Gram negative infections unless low IV colistin dose was administered.
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Affiliation(s)
- Konstantinos Z Vardakas
- Alfa Institute of Biomedical Sciences, Athens, Greece; Department of Medicine, Henry Dunant Hospital Center, Athens, Greece
| | | | | | - Matthew E Falagas
- Alfa Institute of Biomedical Sciences, Athens, Greece; Department of Medicine, Henry Dunant Hospital Center, Athens, Greece; Department of Medicine, Tufts University School of Medicine, Boston, MA, USA.
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Mensa J, Barberán J, Soriano A, Llinares P, Marco F, Cantón R, Bou G, del Castillo JG, Maseda E, Azanza JR, Pasquau J, García-Vidal C, Reguera JM, Sousa D, Gómez J, Montejo M, Borges M, Torres A, Alvarez-Lerma F, Salavert M, Zaragoza R, Oliver A. Antibiotic selection in the treatment of acute invasive infections by Pseudomonas aeruginosa: Guidelines by the Spanish Society of Chemotherapy. REVISTA ESPANOLA DE QUIMIOTERAPIA : PUBLICACION OFICIAL DE LA SOCIEDAD ESPANOLA DE QUIMIOTERAPIA 2018; 31:78-100. [PMID: 29480677 PMCID: PMC6159363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Pseudomonas aeruginosa is characterized by a notable intrinsic resistance to antibiotics, mainly mediated by the expression of inducible chromosomic β-lactamases and the production of constitutive or inducible efflux pumps. Apart from this intrinsic resistance, P. aeruginosa possess an extraordinary ability to develop resistance to nearly all available antimicrobials through selection of mutations. The progressive increase in resistance rates in P. aeruginosa has led to the emergence of strains which, based on their degree of resistance to common antibiotics, have been defined as multidrug resistant, extended-resistant and panresistant strains. These strains are increasingly disseminated worldwide, progressively complicating the treatment of P. aeruginosa infections. In this scenario, the objective of the present guidelines was to review and update published evidence for the treatment of patients with acute, invasive and severe infections caused by P. aeruginosa. To this end, mechanisms of intrinsic resistance, factors favoring development of resistance during antibiotic exposure, prevalence of resistance in Spain, classical and recently appeared new antibiotics active against P. aeruginosa, pharmacodynamic principles predicting efficacy, clinical experience with monotherapy and combination therapy, and principles for antibiotic treatment were reviewed to elaborate recommendations by the panel of experts for empirical and directed treatment of P. aeruginosa invasive infections.
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Affiliation(s)
- José Mensa
- Servicio de Enfermedades Infecciosas, Hospital Clinic, Barcelona, Spain
| | - José Barberán
- Servicio de Medicina Enfermedades infecciosas, Hospital Universitario HM Montepríncipe, Universidad San Pablo CEU. Madrid, Spain
| | - Alex Soriano
- Servicio de Enfermedades Infecciosas, Hospital Clinic, Barcelona, Spain
| | - Pedro Llinares
- Unidad de Enfermedades Infecciosas, Complejo Hospitalario Universitario A Coruña, Spain
| | - Francesc Marco
- Servicio de Microbiología, Hospital Clinic, Barcelona, Spain
| | - Rafael Cantón
- Servicio de Microbiología, Hospital Universitario Ramón y Cajal and Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS). Madrid, Spain
| | - German Bou
- Servicio de Microbiología, Complejo Hospitalario Universitario A Coruña, Spain
| | | | - Emilio Maseda
- Servicio de Anestesiología, Hospital Universitario La Paz, Madrid, Spain
| | - José Ramón Azanza
- Servicio de Farmacología, Clínica Universitaria de Navarra, Pamplona, Spain
| | - Juan Pasquau
- Servicio de Enfermedades Infecciosas, Hospital Universitario Virgen de la Nieves, Granada, Spain
| | | | - José María Reguera
- Servicio de Enfermedades Infecciosas, Hospital Universitario Carlos Haya, Málaga, Spain
| | - Dolores Sousa
- Unidad de Enfermedades Infecciosas, Complejo Hospitalario Universitario A Coruña, Spain
| | - Joaquín Gómez
- Servicio de Enfermedades Infecciosas, Hospital Clínico Universitario Virgen de la Arrixaca, Murcia, Spain
| | - Miguel Montejo
- Servicio de Enfermedades Infecciosas, Hospital Universitario Cruces, Bilbao, Spain
| | - Marcio Borges
- Servicio de Medicina Intensiva, Hospital Son Llátzer, Palma de Mallorca, Spain
| | - Antonio Torres
- Departamento de Neumología, Hospital Clinic, Barcelona, Spain
| | | | - Miguel Salavert
- Unidad de Enfermedades Infecciosas. Hospital Univeristario la Fe, Valencia, Spain
| | - Rafael Zaragoza
- Servicio de Medicina Intensiva, Hospital Universitario Dr. Peset, Valencia, Spain
| | - Antonio Oliver
- Servicio de Microbiología, Hospital Universitari Son Espases, Instituto de Investigación Sanitaria Illes Balears (idISBa), Palma de Mallorca, Spain
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24
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Wood GC, Swanson JM. An Update on Aerosolized Antibiotics for Treating Hospital-Acquired and Ventilator-Associated Pneumonia in Adults. Ann Pharmacother 2017; 51:1112-1121. [PMID: 28778127 DOI: 10.1177/1060028017723934] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
OBJECTIVE A significant percentage of patients with hospital-acquired pneumonia (HAP) and ventilator-associated pneumonia (VAP) have poor outcomes with intravenous antibiotics. It is not clear if adding aerosolized antibiotics improves treatment. This review is an update on using aerosolized antibiotics for treating HAP/VAP in adults. DATA SOURCES PubMed search using the terms "aerosolized antibiotics pneumonia," "nebulized antibiotics pneumonia," and "inhaled antibiotics pneumonia." Reference lists from identified articles were also searched. STUDY SELECTION AND DATA EXTRACTION Clinical studies of aerosolized antibiotics for treating HAP/VAP in adults from July 2010 to March 2017. This article updates a previous review on this topic written in mid-2010. DATA SYNTHESIS The size and quality of studies have improved dramatically in the recent time period compared to previous studies. However, there still are not large randomized controlled trials available. Colistin and aminoglycosides were the most commonly studied agents, and the most common pathogens were Pseudomonas and Acinetobacter. The clinical efficacy of adding aerosolized antibiotics was mixed. Approximately half of the studies showed better outcomes, and none showed worse outcomes. Aerosolized antibiotics appear to be relatively safe, though pulmonary adverse events can occur. Attention to proper administration technique in mechanically ventilated patients is required, including the use of vibrating plate nebulizers. CONCLUSIONS Adding aerosolized antibiotics to intravenous antibiotics may improve the outcomes of adult patients with HAP/VAP in some settings. It seems reasonable to add aerosolized antibiotics in patients with multidrug-resistant organisms or who appear to be failing therapy. Clinicians should pay attention to potential adverse events and proper administration technique.
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Affiliation(s)
| | - Joseph M Swanson
- 1 University of Tennessee Health Science Center, Memphis, TN, USA
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Mathes T, Pieper D. Clarifying the distinction between case series and cohort studies in systematic reviews of comparative studies: potential impact on body of evidence and workload. BMC Med Res Methodol 2017; 17:107. [PMID: 28716005 PMCID: PMC5513097 DOI: 10.1186/s12874-017-0391-8] [Citation(s) in RCA: 92] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Accepted: 07/10/2017] [Indexed: 12/15/2022] Open
Abstract
Distinguishing cohort studies from case series is difficult.We propose a conceptualization of cohort studies in systematic reviews of comparative studies. The main aim of this conceptualization is to clarify the distinction between cohort studies and case series. We discuss the potential impact of the proposed conceptualization on the body of evidence and workload.All studies with exposure-based sampling gather multiple exposures (with at least two different exposures or levels of exposure) and enable calculation of relative risks that should be considered cohort studies in systematic reviews, including non-randomized studies. The term "enables/can" means that a predefined analytic comparison is not a prerequisite (i.e., the absolute risks per group and/or a risk ratio are provided). Instead, all studies for which sufficient data are available for reanalysis to compare different exposures (e.g., sufficient data in the publication) are classified as cohort studies.There are possibly large numbers of studies without a comparison for the exposure of interest but that do provide the necessary data to calculate effect measures for a comparison. Consequently, more studies could be included in a systematic review. Therefore, on the one hand, the outlined approach can increase the confidence in effect estimates and the strengths of conclusions. On the other hand, the workload would increase (e.g., additional data extraction and risk of bias assessment, as well as reanalyses).
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Affiliation(s)
- Tim Mathes
- Institute for Research in Operative Medicine, Chair of Surgical Research, Faculty of Health, School of Medicine, Witten/Herdecke University, Ostmerheimer Str. 200, 51109 Cologne, Germany
| | - Dawid Pieper
- Institute for Research in Operative Medicine, Chair of Surgical Research, Faculty of Health, School of Medicine, Witten/Herdecke University, Ostmerheimer Str. 200, 51109 Cologne, Germany
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Potential Toxicity of Polymyxins in Human Lung Epithelial Cells. Antimicrob Agents Chemother 2017; 61:AAC.02690-16. [PMID: 28416543 DOI: 10.1128/aac.02690-16] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Accepted: 04/01/2017] [Indexed: 01/10/2023] Open
Abstract
Inhaled polymyxins are of considerable utility in achieving optimal exposure in the respiratory tract for the treatment of lung infections caused by multidrug-resistant Gram-negative pathogens. Current inhaled polymyxin therapy is empirical, and often large doses are used that may lead to potential pulmonary adverse effects. This study aimed to investigate the effect of polymyxins on human lung epithelial (A549) cells. The viability of A549 cells was examined after treatment with polymyxins by flow cytometry. Activation of caspases 3, 8, and 9, expression of Fas ligand (FasL), loss of mitochondrial membrane potential, and mitochondrial oxidative stress induced by polymyxin B were evaluated. The concentration of polymyxin B required to induce 50% of maximal cell death was 1.74 mM (95% confidence interval, 1.60 to 1.90 mM). Colistin was at least 2-fold less toxic than polymyxin B, while colistimethate was nontoxic. With 2.0 mM polymyxin B, 30.6% ± 11.5% (mean ± standard deviation) of the cells were apoptotic at 8 h and this increased to 71.3% ± 3.72% at 24 h. Concentration- and time-dependent activation of caspases 3, 8, and 9 was evident, while the activation of caspase 9 was more dramatic. Furthermore, polymyxin B caused concentration- and time-dependent FasL expression, production of mitochondrial reactive oxygen species, and changes in mitochondrial membrane potential. This is the first study to demonstrate that both extrinsic death receptor and intrinsic mitochondrial pathways are involved in polymyxin-induced toxicity in A549 cells. This knowledge base is critical for the development of novel strategies for the safe and effective inhalation therapy of polymyxins against Gram-negative "superbugs."
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Efficacy and toxicity of high-dose nebulized colistin for critically ill surgical patients with ventilator-associated pneumonia caused by multidrug-resistant Acinetobacter baumannii. J Crit Care 2017; 40:251-256. [PMID: 28458172 DOI: 10.1016/j.jcrc.2017.04.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Revised: 03/29/2017] [Accepted: 04/05/2017] [Indexed: 11/21/2022]
Abstract
PURPOSE Few studies have compared nebulized and intravenous (IV) colistin for multidrug-resistant Acinetobacter baumannii and Pseudomonas aeruginosa pneumonia. This study compared the nephrotoxicity and clinical outcomes for these two delivery routes. METHODS This study retrospectively compared 95 critically ill surgical patients who were diagnosed with Acinetobacter baumannii ventilator associated pneumonia and received colistin between March 2013 and January 2016. RESULTS The most common diagnoses were brain hemorrhage (27.4%), traumatic brain injury (20%), traumatic thoracic injury (15.8%), and secondary peritonitis (11.6%). Compared to the IV group, the nebulizer group was significantly older (60.0 vs. 67.5years, p=0.010), had higher APACHE II scores (16.3 vs. 19.9, p=0.001), and more frequently had diabetes mellitus (6.8% vs. 21.6%, p=0.043). Nephrotoxicity was more common in the IV group (60.5% vs. 15.7%, p<0.0001). Both groups had similar microbiological and clinical outcomes (p=0.921 and p=0.719, respectively). Patients with nephrotoxicity exhibited prolonged IV or nebulized colistin treatment and more frequent combination with vancomycin. Nephrotoxicity was independently associated with IV delivery (odds ratio: 8.48, 95% confidence interval: 2.95-24.39, p<0.0001). CONCLUSIONS Nebulized colistin may have less nephrotoxicity and provide similar clinical results, compared to IV colistin.
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Kim YK, Lee JH, Lee HK, Chung BC, Yu SJ, Lee HY, Park JH, Kim S, Kim HK, Kiem S, Jang HJ. Efficacy of nebulized colistin-based therapy without concurrent intravenous colistin for ventilator-associated pneumonia caused by carbapenem-resistant Acinetobacter baumannii. J Thorac Dis 2017; 9:555-567. [PMID: 28449463 PMCID: PMC5394082 DOI: 10.21037/jtd.2017.02.61] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
BACKGROUND Although there have been studies regarding the role of nebulized colistin as adjunctive therapy of ventilator-associated pneumonia (VAP) caused by carbapenem-resistant Acinetobacter baumannii (CRAB), a paucity of information on the efficacy of nebulized colistin as monotherapy is available. METHODS We retrospectively reviewed 219 patients with VAP caused by CRAB treated with either intravenous (n=93) or nebulized colistin (n=126), from March 2010 to November 2015. Factors related to clinical failure was assessed using propensity-score-matched analysis. RESULTS Of 219 patients, 39 patients from each group (n=78) were matched after covariate adjustment using propensity score. There were no significant differences in baseline characteristics as well as the rates of clinical failure between the propensity-score-matched groups [Odds ratio (OR), 0.48; 95% confidence interval (CI), 0.19-1.19; P=0.11], while a significantly lower rate of acute kidney injury (AKI) during colistin therapy (18% vs. 49%, P=0.004) was observed in nebulized colistin group. In addition, multivariable analysis revealed that nebulized colistin did not significantly alter the rate of clinical failure [adjusted odds ratio (aOR), 0.36; 95% CI, 0.12-1.09; P=0.070]. Instead, medical intensive care unit (ICU) admission (aOR, 7.14; 95% CI, 1.60-32.00; P=0.010), and septic shock (aOR, 3.93; 95% CI, 1.27-12.17; P=0.018) were independent risk factors for clinical failure. CONCLUSIONS Our findings suggest that nebulized colistin-based therapy, even without concurrent administration of intravenous colistin, may be an effective and safe treatment option for VAP caused by CRAB.
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Affiliation(s)
- Yong Kyun Kim
- Division of Infectious Diseases, Department of Internal Medicine, Inje University Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea
| | - Jae Ha Lee
- Division of Pulmonology and Critical Care Medicine, Department of Internal Medicine, Inje University Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea
| | - Hyun-Kyung Lee
- Division of Pulmonology and Critical Care Medicine, Department of Internal Medicine, Inje University Busan Paik Hospital, Inje University College of Medicine, Busan, Republic of Korea
| | - Byung Cheol Chung
- Division of Pulmonology and Critical Care Medicine, Department of Internal Medicine, Inje University Busan Paik Hospital, Inje University College of Medicine, Busan, Republic of Korea
| | - Seung Jung Yu
- Division of Pulmonology and Critical Care Medicine, Department of Internal Medicine, Inje University Busan Paik Hospital, Inje University College of Medicine, Busan, Republic of Korea
| | - Ho-Young Lee
- Division of Pulmonology and Critical Care Medicine, Department of Internal Medicine, Inje University Busan Paik Hospital, Inje University College of Medicine, Busan, Republic of Korea
| | - Jin-Han Park
- Division of Pulmonology and Critical Care Medicine, Department of Internal Medicine, Inje University Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea
| | - Sunyoung Kim
- Division of Pulmonology and Critical Care Medicine, Department of Internal Medicine, Inje University Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea
| | - Hyeon-Kuk Kim
- Division of Pulmonology and Critical Care Medicine, Department of Internal Medicine, Inje University Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea
| | - Sungmin Kiem
- Division of Infectious Diseases, Department of Internal Medicine, Inje University Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea
| | - Hang-Jea Jang
- Division of Pulmonology and Critical Care Medicine, Department of Internal Medicine, Inje University Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea
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Poulakou G, Siakallis G, Tsiodras S, Arfaras-Melainis A, Dimopoulos G. Nebulized antibiotics in mechanically ventilated patients: roadmap and challenges. Expert Rev Anti Infect Ther 2017; 15:211-229. [DOI: 10.1080/14787210.2017.1268052] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- G Poulakou
- 4th Department of Internal Medicine and Infectious Diseases Unit, Athens National and Kapodistrian University, Medical School, Attikon University General Hospital of Athens, Athens, Greece
| | - G Siakallis
- 4th Department of Internal Medicine and Infectious Diseases Unit, Athens National and Kapodistrian University, Medical School, Attikon University General Hospital of Athens, Athens, Greece
| | - S Tsiodras
- 4th Department of Internal Medicine and Infectious Diseases Unit, Athens National and Kapodistrian University, Medical School, Attikon University General Hospital of Athens, Athens, Greece
| | - A Arfaras-Melainis
- 4th Department of Internal Medicine and Infectious Diseases Unit, Athens National and Kapodistrian University, Medical School, Attikon University General Hospital of Athens, Athens, Greece
| | - G Dimopoulos
- Department of Critical Care, University Hospital ATTIKON, Faculty of Medicine, National and Kapodistrian University of Athens, Athens, Greece
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Wenzler E, Fraidenburg DR, Scardina T, Danziger LH. Inhaled Antibiotics for Gram-Negative Respiratory Infections. Clin Microbiol Rev 2016; 29:581-632. [PMID: 27226088 PMCID: PMC4978611 DOI: 10.1128/cmr.00101-15] [Citation(s) in RCA: 75] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Gram-negative organisms comprise a large portion of the pathogens responsible for lower respiratory tract infections, especially those that are nosocomially acquired, and the rate of antibiotic resistance among these organisms continues to rise. Systemically administered antibiotics used to treat these infections often have poor penetration into the lung parenchyma and narrow therapeutic windows between efficacy and toxicity. The use of inhaled antibiotics allows for maximization of target site concentrations and optimization of pharmacokinetic/pharmacodynamic indices while minimizing systemic exposure and toxicity. This review is a comprehensive discussion of formulation and drug delivery aspects, in vitro and microbiological considerations, pharmacokinetics, and clinical outcomes with inhaled antibiotics as they apply to disease states other than cystic fibrosis. In reviewing the literature surrounding the use of inhaled antibiotics, we also highlight the complexities related to this route of administration and the shortcomings in the available evidence. The lack of novel anti-Gram-negative antibiotics in the developmental pipeline will encourage the innovative use of our existing agents, and the inhaled route is one that deserves to be further studied and adopted in the clinical arena.
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Affiliation(s)
- Eric Wenzler
- University of Illinois at Chicago, College of Pharmacy, Chicago, Illinois, USA
| | - Dustin R Fraidenburg
- Department of Medicine, Division of Pulmonary, Critical Care, Sleep and Allergy Medicine, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Tonya Scardina
- Loyola University Medical Center, Chicago, Illinois, USA
| | - Larry H Danziger
- University of Illinois at Chicago, College of Pharmacy, Chicago, Illinois, USA University of Illinois at Chicago, College of Medicine, Chicago, Illinois, USA
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Intravenous combined with aerosolised polymyxin versus intravenous polymyxin alone in the treatment of pneumonia caused by multidrug-resistant pathogens: a systematic review and meta-analysis. Int J Antimicrob Agents 2015; 46:603-9. [PMID: 26607337 DOI: 10.1016/j.ijantimicag.2015.09.011] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2015] [Revised: 09/12/2015] [Accepted: 09/28/2015] [Indexed: 11/21/2022]
Abstract
Colistin has been used to treat nosocomial pneumonia (NP) caused by multidrug-resistant (MDR) Gram-negative bacteria (GNB) via different administration routes. Whether patients may benefit from aerosolised colistin as adjunctive treatment was contradictory. We aimed to clarify the safety and efficacy of administering aerosolised and intravenous (IV-AS) colistin versus intravenous (IV) colistin alone in patients with NP caused by MDR-GNB. Two reviewers independently evaluated and extracted data from PubMed, EMBASE and Cochrane databases. Primary outcomes were clinical response rate, all-cause mortality (ICU or hospital), microbiological eradication and nephrotoxicity. Pooled odds ratios (ORs) were calculated and significance was determined by the Z test. Nine eligible studies involving 672 participants were included. The overall clinical response rate (improvement and cure) was significantly higher in the IV-AS group than that in the IV group [OR=1.81, 95% confidence interval (CI) 1.30-2.53; P=0.0005]. Patients treated with IV-AS colistin showed a higher rate of pathogen eradication (OR=1.66, 95% CI 1.11-2.49; P=0.01) and lower all-cause mortality compared with IV colistin (OR=0.69, 95% CI 0.50-0.95; P=0.02). Nephrotoxicity did not differ significantly between IV-AS and IV groups (five studies; 383 patients) (OR=1.11, 95% CI 0.69-1.80; P=0.67). These data indicate that IV-AS colistin has additional benefits compared with IV colistin alone. Clinicians should be encouraged to give combined administration routes in critically ill patients with NP caused by MDR-GNB.
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Wang KC, Liu MF, Lin CF, Shi ZY. The impact of revised CLSI cefazolin breakpoints on the clinical outcomes of Escherichia coli bacteremia. JOURNAL OF MICROBIOLOGY, IMMUNOLOGY, AND INFECTION = WEI MIAN YU GAN RAN ZA ZHI 2015; 49:768-774. [PMID: 26493889 DOI: 10.1016/j.jmii.2015.08.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Revised: 08/30/2015] [Accepted: 08/31/2015] [Indexed: 10/23/2022]
Abstract
BACKGROUND/PURPOSE The susceptibility breakpoints of cephalosporins for Enterobacteriaceae were revised by the Clinical and Laboratory Standards Institute (CLSI) in 2010 and 2011. The clinical outcome and susceptibility data were analyzed to evaluate the impact of revised CLSI cefazolin breakpoints on the treatment of Escherichia coli bacteremia. METHODS Forty-three bacteremic Escherichia coli isolates from Taichung Veterans General Hospital, Taichung, Taiwan, during the period from January 2013 to December 2013, were selected to analyze the minimum inhibitory concentration (MIC) distributions of cefazolin and the correlated clinical responses to cefazolin therapy. RESULTS The modal cefazolin MIC among the 43 isolates was 1 μg/mL and accounted for 18 (42%) isolates. The cumulative percentage for MICs ≤ 2 μg/mL was 79%. The conventional dosing regimens achieved clinical cure in 33 (97%) of 34 patients with bacteremia due to E. coli with a cefazolin MIC ≤ 2 μg/mL, in all of the six patients with a cefazolin MIC of 4 μg/mL, and all of the three patients with a cefazolin MIC of 8 μg/mL. CONCLUSION The microbiological data support the revised CLSI breakpoints of cefazolin. The conventional cefazolin dosing regimens can still achieve satisfactory clinical cure rates for bacteremia of E. coli with a cefazolin MIC ≤ 2 μg/mL in patients without severe septic shock. Before the approval of the efficacy of cefazolin for the treatment of E. coli isolates with a cefazolin MIC of 4 μg/mL, it is prudent to use cefazolin only when a high drug level can be achieved in the infection site, such as the urinary tract.
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Affiliation(s)
- Kung-Ching Wang
- Division of Infectious Diseases, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Meei-Fang Liu
- Division of Infectious Diseases, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Chin-Fu Lin
- Microbiology Section of the Medical Laboratory, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Zhi-Yuan Shi
- Division of Infectious Diseases, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung, Taiwan; School of Medicine, National Yang-Ming University, Taipei, Taiwan.
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Tajima K, Miyake T, Koike N, Hattori T, Takahashi H, Matsumoto T, Fujita K, Kuroda M, Ito N, Goto H. Two Different Concentrations of Topical Levofloxacin for the Treatment of Multidrug-Resistant Pseudomonas aeruginosa Keratitis. J Ocul Pharmacol Ther 2015; 31:636-41. [PMID: 26348840 DOI: 10.1089/jop.2015.0026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
PURPOSE To compare the efficacy of topical 1.5% and 0.5% levofloxacin (LVFX) for the treatment of multidrug-resistant Pseudomonas aeruginosa (MDRP) keratitis in rabbits. METHODS In a rabbit eye, we produced an MDRP keratitis model by excising a 2-mm circular disc of the cornea up to a depth of one-half of the stromal layer and inoculated an MDRP strain into the corneal concavity. Nine hours after inoculation and after confirming that MDRP keratitis had developed, we treated the eyes topically with 0.5% levofloxacin, 1.5% levofloxacin, or phosphate-buffered saline (PBS) every 6 h until 57 h postinfection. The infected eyes were evaluated by clinical score, histopathological examination, and viable bacterial count (colony forming units). RESULTS In the MDRP keratitis model, clinical score was significantly lower in 0.5% and 1.5% levofloxacin-treated groups than in PBS-treated group and was the lowest in 1.5% levofloxacin-treated group. Histopathological examination showed maintenance of corneal translucency and little influx of polymorphonuclear neutrophils in 1.5% levofloxacin-treated group. Viable bacterial count in the infected cornea was significantly lower in 0.5% levofloxacin-treated group compared with PBS-treated group, while no viable bacteria were detected in 1.5% levofloxacin-treated group. CONCLUSIONS Using our MDRP keratitis model, we showed that topical 0.5% levofloxacin is not adequately effective, while 1.5% levofloxacin is efficacious in controlling MDRP keratitis.
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Affiliation(s)
- Kazuki Tajima
- 1 Department of Ophthalmology, Tokyo Medical University , Tokyo, Japan .,2 Department of Surgery, Keio University , Tokyo, Japan
| | - Taku Miyake
- 1 Department of Ophthalmology, Tokyo Medical University , Tokyo, Japan
| | - Naohito Koike
- 3 Department of Microbiology, Tokyo Medical University , Tokyo, Japan
| | - Takaaki Hattori
- 1 Department of Ophthalmology, Tokyo Medical University , Tokyo, Japan
| | - Hiroki Takahashi
- 1 Department of Ophthalmology, Tokyo Medical University , Tokyo, Japan
| | - Tetsuya Matsumoto
- 3 Department of Microbiology, Tokyo Medical University , Tokyo, Japan
| | - Koji Fujita
- 4 Department of Molecular Pathology, Tokyo Medical University , Tokyo, Japan
| | - Masahiko Kuroda
- 4 Department of Molecular Pathology, Tokyo Medical University , Tokyo, Japan
| | - Norihiko Ito
- 1 Department of Ophthalmology, Tokyo Medical University , Tokyo, Japan .,5 University Veterinary Medical Center, Tottori University , Tottori, Japan
| | - Hiroshi Goto
- 1 Department of Ophthalmology, Tokyo Medical University , Tokyo, Japan
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Izadpanah M, Khalili H. Antibiotic regimens for treatment of infections due to multidrug-resistant Gram-negative pathogens: An evidence-based literature review. J Res Pharm Pract 2015; 4:105-14. [PMID: 26312249 PMCID: PMC4548428 DOI: 10.4103/2279-042x.162360] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Evidences regarding the efficacy of different antibiotic regimens proposed for treatment of multidrug-resistant (MDR) Gram-negative pathogens have been reviewed. Available data in Scopus, Medline, EMBASE, the Cochrane central register of controlled trials, and Cochrane database of systematic reviews have been collected. Several antibiotic regimens are proposed for treatment of MDR Gram-negative infections (defined as nonsusceptibility to at least one agent in three or more antimicrobial categories). The most challenging issue is the treatment of carbapenem-resistant (CR) Gram-negative pathogens. A carbapenem plus either colistin or tigecycline was the most effective regimen for treatment of CR Gram-negative pathogens with low-level resistance (minimal inhibitory concentration [MIC] ≤ 8 mg/L). However, in high-level resistance (MIC > 8 mg/L), combination of colistin and tigecycline showed promising effect.
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Affiliation(s)
- Mandana Izadpanah
- Department of Clinical Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Hossein Khalili
- Department of Clinical Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
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Effect of nebulized colistin on the ventilator circuit: a prospective pilot case- control study from a single cancer center. Mediterr J Hematol Infect Dis 2015; 7:e2015032. [PMID: 25960860 PMCID: PMC4418373 DOI: 10.4084/mjhid.2015.032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Accepted: 03/23/2015] [Indexed: 11/25/2022] Open
Abstract
Nebulized colistin (NC) is used for the treatment of pneumonia due to multidrug- resistant Gram-negative bacteria. In this one-year case-control study, our objective was to evaluate the effect of NC on the ventilator circuit (VC) components. The case group consisted of 25 mechanically-ventilated patients who received NC for the treatment of nosocomial pneumonia while the control group was 25 mechanically-ventilated patients who did not receive NC. Respiratory therapists inspected the VC every 4 hrs and whenever a ventilator alarm was reported. The VC component was changed if the alarm did not subside after necessary measures were performed. Patients from both groups were treated at the adult medical/surgical intensive care unit at King Hussein Cancer Center. In the case group, 22 (88%) patients required changing at least one of the circuit components (flow sensor, exhalation membrane, or nebulizer kit). The median number of changes (range) per patient of the flow sensor, exhalation membrane, and nebulizer kit were: 2 (1–3), 2 (1–6), and 1 (1–2), respectively. Large amounts of white crystals, which resembled the colistin powder, were reported on the replaced VC components. The flow sensor was changed in 2 control patients, but white crystals were absent. Crystals obtained from one case subject were confirmed to be colistin by chromatographic mass spectroscopy. Further studies are needed to evaluate the effect of crystal formation on the efficacy of NC and clinical outcomes.
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The role of aerosolized colistin in the treatment of ventilator-associated pneumonia: a systematic review and metaanalysis. Crit Care Med 2015; 43:527-33. [PMID: 25493971 DOI: 10.1097/ccm.0000000000000771] [Citation(s) in RCA: 93] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
OBJECTIVES The present meta-analysis and systematic review evaluated the efficacy and safety of aerosolized colistin as adjunctive therapy to i.v. antimicrobials or as monotherapy in the treatment of ventilator-associated pneumonia. DESIGN The databases of MEDLINE and Cochrane Library up to June 2013 and all reference lists of the included studies and relevant reviews were searched. Studies were eligible if the efficacy and safety of aerosolized colistin in the treatment of ventilator-associated pneumonia was evaluated. An overall effect estimate for all dichotomous data as an odds ratio with 95% CI was calculated by the Mantel-Haenszel or the DerSimonian and Laird method depending on the statistical heterogeneity. The Grading of Recommendations Assessment, Development, and Evaluation approach was used to interpret the findings. INTERVENTIONS None. MEASUREMENTS AND MAIN RESULTS Sixteen studies fulfilled the inclusion criteria: eight were comparing adjunctive aerosolized versus i.v. colistin (seven observational cohort or case-control studies and one randomized trial) and were meta-analyzed, and eight were single arm and were only systematically reviewed. The Grading of Recommendations Assessment, Development, and Evaluation approach showed limitations of the study design and presence of inconsistency in most of the outcomes, but no obvious indirectness or imprecision of results reporting. Based on the above assessments, the quality of evidence presented for each outcome ranged from "very low" to "low." A significant improvement in clinical response (odds ratio, 1.57; 95% CI, 1.14-2.15; p = 0.006; I2 = 37%), microbiological eradication (odds ratio, 1.61; 95% CI, 1.11-2.35; p = 0.01; I2 = 0%), and infection-related mortality (odds ratio, 0.58; 95% CI, 0.34-0.96; p = 0.04; I2 = 46%) was observed with the addition of aerosolized colistin to i.v. treatment, whereas the addition of aerosolized colistin did not affect overall mortality (odds ratio, 0.74; 95% CI, 0.54-1.01; p = 0.06; I2 = 25%) or nephrotoxicity (odds ratio, 1.18; 95% CI, 0.76-1.83; p = 0.45; I2 = 0%). CONCLUSION Based on the present results and awaiting further evidence from randomized trials, aerosolized colistin is associated with improved outcome in the treatment of ventilator-associated pneumonia although the level of evidence was low.
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Abstract
Increasing incidence of resistance of gram-negative bacteria against even newer antibiotic including carbapenem has generated interest in the old antibiotic colistin, which are being used as salvage therapy in the treatment of multidrug resistant infection. Colistin has excellent bactericidal activity against most gram-negative bacilli. It has shown persist level in the liver, kidney, heart, and muscle; while it is poorly distributed to the bones, cerebrospinal fluid, lung parenchyma, and pleural cavity. Being an old drug, colistin was never gone through the drug development process needed for compliance with competent regulatory authorities that resulted in very much limited understanding of pharmacokinetic (PK) and pharmacodynamic (PD) parameters, such as Cmax/MIC ratio, AUC/MIC and T > MIC that could predict the efficacy of colistin. In available PK/PD studies of colistin, mean maximum serum concentration (Cmax) of colistin were found just above the MIC breakpoint at steady states that would most probably lead to suboptimal for killing the bacteria, even at dosages of 3.0 million international units (MIU) i.e., 240 mg of colistimethate sodium (CMS) intravenously every 8 h. These finding stresses to use high loading as well as high maintenance dose of intravenous colistin. It is not only suboptimal plasma concentration of colistin but also poor lung tissue concentration, which has been demonstrated in recent studies, poses major concern in using intravenous colistin. Combination therapy mainly with carbapenems shows synergistic effect. In recent studies, inhaled colistin has been found promising in treatment of lung infection due to MDR gram-negative bacteria. New evidence shows less toxicity than previously reported.
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Affiliation(s)
- Mohan Gurjar
- Department of Critical Care Medicine, Sanjay Gandhi Postgraduate Institute of Medical Sciences (SGPGIMS), Lucknow, UP India
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Chuang CH, Liu MF, Lin CF, Shi ZY. Impact of revised susceptibility breakpoints on bacteremia of Klebsiella pneumoniae: Minimum inhibitory concentration of cefazolin and clinical outcomes. JOURNAL OF MICROBIOLOGY, IMMUNOLOGY, AND INFECTION = WEI MIAN YU GAN RAN ZA ZHI 2014; 49:679-684. [PMID: 25442869 DOI: 10.1016/j.jmii.2014.08.021] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2014] [Revised: 08/28/2014] [Accepted: 08/29/2014] [Indexed: 12/01/2022]
Abstract
BACKGROUND The Clinical and Laboratory Standards Institute (CLSI) revised the susceptibility breakpoints of cephalosporins for Enterobacteriaceae in 2010 and 2011. However, there is a lack of clinical data about the correlation of minimum inhibitory concentrations (MICs) and clinical outcome. Data for the distribution of MICs and clinical outcomes were analyzed in this study to evaluate the impact of changes in the CLSI breakpoints on the treatment of Klebsiella pneumoniae bacteremia. METHODS Ninety-seven bacteremic K. pneumoniae isolates from Taichung Veterans General Hospital, Taichung, Taiwan were collected for study during the period 2009-2011. The cefazolin MIC was determined by the broth microdilution method according to the recommendations of the CLSI. The MIC distribution of cefazolin and the clinical responses to definitive cefazolin treatment were analyzed. RESULTS The modal cefazolin MIC among the 97 isolates was 1 μg/mL and accounted for 73 (75.3%) isolates. There were 18 (18.6%) isolates with a cefazolin MIC of 2 μg/mL. The conventional dosage regimens of cefazolin (1 g every 6 hours or 8 hours) achieved a clinical cure in 70 (97.2%) of 72 patients in the group with a cefazolin MIC ≤1 μg/mL and in 14 (87.5%) of 16 patients in the group with a cefazolin MIC of 2 μg/mL. With the conventional dose, the cumulative clinical cure rate for K. pneumoniae bacteremia with cefazolin MIC ≤2 μg/mL was 95.5% (84/88 patients). CONCLUSION The conventional cefazolin dose still can result in satisfactory clinical cure rates for bacteremic episodes due to K. pneumoniae with cefazolin MIC ≤2 μg/mL, the revised susceptible breakpoint of CLSI 2011.
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Affiliation(s)
- Chia-Hui Chuang
- Division of Infectious Diseases, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Meei-Fang Liu
- Division of Infectious Diseases, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Chin-Fu Lin
- Microbiology Section of the Medical Laboratory, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Zhi-Yuan Shi
- Division of Infectious Diseases, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung, Taiwan; School of Medicine, National Yang-Ming University, Taipei, Taiwan.
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Cervera C, van Delden C, Gavaldà J, Welte T, Akova M, Carratalà J. Multidrug-resistant bacteria in solid organ transplant recipients. Clin Microbiol Infect 2014; 20 Suppl 7:49-73. [DOI: 10.1111/1469-0691.12687] [Citation(s) in RCA: 110] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Revised: 05/16/2014] [Accepted: 05/18/2014] [Indexed: 12/23/2022]
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Conway H, Dix KJ, McDonald JD, Miller RA, Wall HG, Wolff RK, Reed MD. Comparison of inhalation toxicity studies of gentamicin in rats and dogs. Inhal Toxicol 2014; 25:714-24. [PMID: 24255949 DOI: 10.3109/08958378.2013.843043] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Nebulized gentamicin solution was administered to rats (nose-only) and dogs (face mask) for 14 days with a 14-day recovery period. Control groups of each were exposed to saline aerosols. Mean estimated inhaled lung doses of gentamicin were 39, 123 and 245 mg/kg for rats (deposited doses 6, 17 and 34 mg/kg) over 30, 90 and 180 min, respectively. Since dogs do not tolerate exposures as long as rats, inhaled lung doses were limited to 7, 14 and 41 mg/kg (deposited doses of 1, 3 and 8 mg/kg) over 15, 30 and 60 min. Comparable doses were achieved at the low dose for rats and high dose for dogs. Serum AUCs (14 ± 2 µg/mL h (mean ± SD) at 6 mg/kg in rats and 11 ± 7 µg/mL h at 8 mg/kg in dogs) showed comparable exposure between the two, implying similar absorbed doses and confirming similar deposited lung doses. Rat exposures resulted in dose-related lung pathology (including low dose) manifested as upper respiratory tract irritant reactions with alveolar histiocytosis, inflammation, airway epithelial metaplasia and lymphomegaly in lung tissue. This was associated with high lung tissue gentamicin levels 24 h post-dose on Day 14 (375 ± 33 µg/g at deposited dose of 6 mg/kg). Dose-related kidney tubular necrosis (a well-known toxicity of parenteral gentamicin) was observed, but no test-article related effects on lung histopathology in dogs (even at highest deposited dose of 8 mg/kg) and low levels of lung tissue gentamicin (42 ± 11 µg/g) 24 h post-dose on Day 14.
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Tajima K, Miyake T, Koike N, Hattori T, Kumakura S, Yamaguchi T, Matsumoto T, Fujita K, Kuroda M, Ito N, Goto H. In vivo challenging of polymyxins and levofloxacin eye drop against multidrug-resistant Pseudomonas aeruginosa keratitis. J Infect Chemother 2014; 20:343-9. [DOI: 10.1016/j.jiac.2013.10.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Revised: 10/28/2013] [Accepted: 10/29/2013] [Indexed: 11/25/2022]
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Biopharmaceutical characterization of nebulized antimicrobial agents in rats: 2. Colistin. Antimicrob Agents Chemother 2014; 58:3950-6. [PMID: 24798284 DOI: 10.1128/aac.02819-14] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
The purpose of this study was to investigate the pharmacokinetic properties of colistin following intrapulmonary administration of colistin sulfate in rats. Colistin was infused or delivered in nebulized form at a dose of 0.35 mg/kg of body weight in rats, and plasma drug concentrations were measured for 4 h after administration. Bronchoalveolar lavages (BAL) were also conducted at 0.5, 2, and 4 h after intravenous (i.v.) administration and administration via nebulized drug to estimate epithelial lining fluid (ELF) drug concentrations. Unbound colistin plasma concentrations at distribution equilibrium (2 h postdosing) were almost identical after i.v. infusion and nebulized drug inhalation. ELF drug concentrations were undetectable in BAL samples after i.v. administration, but they were about 1,800 times higher than unbound plasma drug levels at 2 h and 4 h after administration of the nebulized drug. Simultaneous pharmacokinetic modeling of plasma and ELF drug concentrations was performed with a model characterized by a fixed physiological volume of ELF (VELF), a passive diffusion clearance (QELF) between plasma and ELF, and a nonlinear influx transfer from ELF to the central compartment, which was assessed by reducing the nebulized dose of colistin by 10-fold (0.035 mg kg(-1)). The km was estimated to be 133 μg ml(-1), and the Vmax, in-to-Km ratio was equal to 2.5 × 10(-3) liter h(-1) kg(-1), which was 37 times higher than the QELF (6.7 × 10(-5) liter h(-1) kg(-1)). This study showed that with the higher ELF drug concentrations after administration via nebulized aerosol than after intravenous administration, for antibiotics with low permeability such as colistin, nebulization offers a real potential over intravenous administration for the treatment of pulmonary infections.
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Kang CH, Tsai CM, Wu TH, Wu HY, Chung MY, Chen CC, Huang YC, Liu SF, Liao DL, Niu CK, Lee CH, Yu HR. Colistin inhalation monotherapy for ventilator-associated pneumonia of Acinetobacter baumannii in prematurity. Pediatr Pulmonol 2014; 49:381-8. [PMID: 23359527 DOI: 10.1002/ppul.22750] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2012] [Accepted: 12/18/2012] [Indexed: 11/08/2022]
Abstract
BACKGROUND Ventilator-associated pneumonia (VAP) caused by Acinetobacter baumannii is increasing. It has a high mortality rate but experience in using inhaled colistin as monotherapy for VAP in children, especially pre-term infants, is limited. This study presents experiences using aerosolized colistin as monotherapy for VAP due to A. baumannii infection in pre-term infants. METHODS Eight pre-term infants (gestational age 25-36 weeks) admitted to the neonatal intensive care unit (NICU) of Kaohsiung Chang Gung Memorial Hospital in Taiwan from January 2006 to December 2010 who received inhaled colistin as monotherapy for VAP due to A. baumannii infection were retrospectively evaluated. Of the isolated microorganisms, five were multi-drug resistant strains of A. baumannii (MDR-AB) but all were sensitive to colistin. All patients received inhaled colistin at a dose of 1,000,000 IU (33.4 mg) twice daily for an average of 9.1 days (range, 4-22 days). RESULTS All pre-term infants were cured, with A. baumannii eradicated from airway secretions. There were no clinical or laboratory adverse events related to colistin use. CONCLUSIONS Aerosolized colistin may be used as monotherapy for VAP due to A. baumannii infection in pre-term infants. A larger controlled study is warranted to corroborate the findings.
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Affiliation(s)
- Chia-Hao Kang
- Department of Pediatrics, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
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Choi HK, Kim YK, Kim HY, Uh Y. Inhaled colistin for treatment of pneumonia due to colistin-only-susceptible Acinetobacter baumannii. Yonsei Med J 2014; 55:118-25. [PMID: 24339296 PMCID: PMC3874897 DOI: 10.3349/ymj.2014.55.1.118] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
PURPOSE Colistin is used for the treatment of pneumonia associated with multidrug- resistant Acinetobacter baumannii and Pseudomonas aeruginosa. However, the best route of administration and dosage is not known. We report our experience with aerosolized colistin in twelve patients with pneumonia caused by colistin-only-susceptible (COS) A. baumannii. MATERIALS AND METHODS We retrospectively reviewed patients' medical records who were treated with aerosolized colistin for the treatment of pneumonia. RESULTS Ten patients were treated only with aerosolized colistin inhalation and two patients received a 3-day course intravenous colistin, and then switched to colistin inhalation therapy. The median duration of aerosolized colistin therapy was 17 days (5-31 days). Four patients were treated only with aerosolized colistin, whereas 4 patients received concomitant glycopeptides, and 4 received concomitant levofloxacin or cefoperazone/sulbactam. At the end of the therapy, the clinical response rate and bacteriological clearance rate was 83% and 50%, respectively. Colistin-resistant strains were isolated from 3 patients after aerosolized colistin therapy; however, all of them showed favorable clinical response. The median interval between inhalation therapy and resistance was 7 days (range 5-19 days). Acute kidney injury developed in 3 patients. Two patients experienced Clostridium difficile associated diarrhea. One patient developed fever and skin rash after aerosolized colistin therapy. No patient developed neurotoxicity or bronchospasm. CONCLUSION Colistin inhalation therapy is deemed tolerable and safe, and could be beneficial as an adjuctive therapy for the management of pneumonia due to COS A. baumannii. However, the potential development of colistin resistance cannot be overlooked.
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Affiliation(s)
- Hee Kyoung Choi
- Department of Laboratory Medicine, Yonsei University Wonju College of Medicine, 20 Ilsan-ro, Wonju 220-701, Korea.
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Luyt CE, Bréchot N, Combes A, Trouillet JL, Chastre J. Delivering antibiotics to the lungs of patients with ventilator-associated pneumonia: an update. Expert Rev Anti Infect Ther 2013; 11:511-21. [PMID: 23627857 DOI: 10.1586/eri.13.36] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Ventilator-associated pneumonia is a serious hospital-acquired infection, with 20-70% crude mortality and 10-40% estimated attributable mortality. Insufficient antibiotic concentrations at the infection site when these drugs are given intravenously may lead to poor outcomes, particularly when difficult-to-treat pathogens are responsible; for example, Pseudomonas aeruginosa, extended spectrum beta lactamase-producing Gram-negative bacilli, Acinetobacter spp. and/or methicillin-resistant Staphylococcus aureus. Direct drug delivery to the infection site via aerosolization combined with intravenous administration achieves concentrations exceeding MICs of the pathogens, even those with impaired susceptibility. Experimental and recent clinical results demonstrated our markedly improved ability to deliver aerosolized antibiotics to the lung with new-generation devices, for example, vibrating-mesh nebulizers. Convincing clinical data from a large randomized trial are still lacking to support the routine administration of aerosolized antibiotics to treat ventilator-associated pneumonia, even though some small-randomized trials' observations are encouraging.
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Affiliation(s)
- Charles-Edouard Luyt
- Service de Réanimation Médicale, Institut de Cardiologie, Groupe Hospitalier Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris, 47-83, Boulevard de l'Hôpital, 75651 Paris Cedex 13, France.
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van Duin D, van Delden C. Multidrug-resistant gram-negative bacteria infections in solid organ transplantation. Am J Transplant 2013; 13 Suppl 4:31-41. [PMID: 23464996 DOI: 10.1111/ajt.12096] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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Athanassa ZE, Markantonis SL, Fousteri MZF, Myrianthefs PM, Boutzouka EG, Tsakris A, Baltopoulos GJ. Pharmacokinetics of inhaled colistimethate sodium (CMS) in mechanically ventilated critically ill patients. Intensive Care Med 2012; 38:1779-86. [DOI: 10.1007/s00134-012-2628-7] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2012] [Accepted: 06/03/2012] [Indexed: 10/28/2022]
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