1
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Vieira PC, de Oliveira RB, da Silva Mendonça TM. Should oral chlorhexidine remain in ventilator-associated pneumonia prevention bundles? Med Intensiva 2022; 46:259-268. [PMID: 35598950 DOI: 10.1016/j.medine.2020.09.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Accepted: 09/23/2020] [Indexed: 01/19/2023]
Abstract
Ventilator-associated pneumonia (VAP) is related with high mortality, duration of mechanical ventilation and costs. Recent studies have questioned the safety and effectiveness of oral chlorhexidine to prevent VAP. We sought to verify whether the adverse effects of this substance outweigh its benefits. We searched several databases and selected studies that investigated the use of oral chlorhexidine and its impact on mortality. No association between oral chlorhexidine and lower VAP rates was found on meta-analyses of double-blind randomized trials, however significant increase in mortality was reported. It is speculated that chlorhexidine can cause damage to several organic sectors and cytotoxicity. Although it still can be beneficial in specific settings, robust evidence to recommend its routine application for all mechanically ventilated patients is lacking; therefore, given the possibility of harm, it would be better to follow the principle of non-maleficence until more studies becomes available.
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Affiliation(s)
- P C Vieira
- Intensive Care Unit, Uberlândia Clinical Hospital, Uberlândia Federal University, Uberlândia, Minas Gerais, Brazil; Health Science PhD Program, Faculty of Medicine, Uberlândia Federal University, Uberlândia, Minas Gerais, Brazil; Neurointensivism Postgraduate Program, Teaching and Research Institute, Sírio-Libanês Hospital, Bela Vista, São Paulo, Brazil.
| | - R B de Oliveira
- Intensive Care Unit, Uberlândia Clinical Hospital, Uberlândia Federal University, Uberlândia, Minas Gerais, Brazil
| | - T M da Silva Mendonça
- Health Science PhD Program, Faculty of Medicine, Uberlândia Federal University, Uberlândia, Minas Gerais, Brazil
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2
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Honore PM, Djimafo P, Redant S, Attou R, Labeau S. Contamination of antimicrobial-resistant bacteria on toothbrushes used with mechanically ventilated patients: A cross sectional study. Intensive Crit Care Nurs 2022; 70:103226. [PMID: 35249793 DOI: 10.1016/j.iccn.2022.103226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Accepted: 02/18/2022] [Indexed: 11/26/2022]
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3
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Reduced chlorhexidine susceptibility is associated with tetracycline resistance tet genes in clinical isolates of Escherichia coli. Antimicrob Agents Chemother 2022; 66:e0197221. [PMID: 35225650 DOI: 10.1128/aac.01972-21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Chlorhexidine is a widely used antiseptic in hospital and community healthcare. Decreased susceptibility to this compound has been recently described in Klebsiella pneumoniae and Pseudomonas aeruginosa, together with cross-resistance to colistin. Surprisingly, few data are available for Escherichia coli, the main species responsible for community and healthcare-associated infections. In order to decipher chlorhexidine resistance mechanisms in E. coli, we studied both in vitro derived and clinical isolates through whole-genome sequence analysis. Comparison of strains grown in vitro under chlorhexidine pressure identified mutations in the gene mlaA coding for a phospholipid transport system. Phenotypic analyses of single-gene mutant from the Keio collection confirmed the role of this mutation in the decreased susceptibility to chlorhexidine. However, mutations in mlaA were not found in isolates from large clinical collections. In contrast, genome wide association studies (GWAS) showed that, in clinical strains, chlorhexidine reduced susceptibility was associated with the presence of tetA genes of class B coding for efflux pumps and located in a Tn10 transposon. Construction of recombinant strains in E. coli K-12 confirmed the role of tetA determinant in acquired resistance to both chlorhexidine and tetracycline. Our results reveal two different evolutionary paths leading to chlorhexidine decreased susceptibility: one restricted to in vitro evolution conditions and involving a retrograde phospholipid transport system; the other observed in clinical isolates associated with efflux pump TetA. None of these mechanisms provides cross-resistance to colistin. This work demonstrates the GWAS power to identify new resistance mechanisms in bacterial species.
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4
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Abstract
Severe pneumonia is associated with high mortality (short and long term), as well as pulmonary and extrapulmonary complications. Appropriate diagnosis and early initiation of adequate antimicrobial treatment for severe pneumonia are crucial in improving survival among critically ill patients. Identifying the underlying causative pathogen is also critical for antimicrobial stewardship. However, establishing an etiological diagnosis is challenging in most patients, especially in those with chronic underlying disease; those who received previous antibiotic treatment; and those treated with mechanical ventilation. Furthermore, as antimicrobial therapy must be empiric, national and international guidelines recommend initial antimicrobial treatment according to the location's epidemiology; for patients admitted to the intensive care unit, specific recommendations on disease management are available. Adherence to pneumonia guidelines is associated with better outcomes in severe pneumonia. Yet, the continuing and necessary research on severe pneumonia is expansive, inviting different perspectives on host immunological responses, assessment of illness severity, microbial causes, risk factors for multidrug resistant pathogens, diagnostic tests, and therapeutic options.
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Affiliation(s)
- Catia Cillóniz
- Department of pneumology, Hospital Clinic of Barcelona, Spain
- August Pi i Sunyer Biomedical Research Institute (IDIBAPS), Barcelona, Spain
- University of Barcelona, Barcelona, Spain
- Biomedical Research Networking Centers in Respiratory Diseases (CIBERES), Barcelona, Spain
| | - Antoni Torres
- Department of pneumology, Hospital Clinic of Barcelona, Spain
- August Pi i Sunyer Biomedical Research Institute (IDIBAPS), Barcelona, Spain
- University of Barcelona, Barcelona, Spain
- Biomedical Research Networking Centers in Respiratory Diseases (CIBERES), Barcelona, Spain
| | - Michael S Niederman
- Weill Cornell Medical College, Department of Pulmonary Critical Care Medicine, New York, NY, USA
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5
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Royer G, Poirel L, La Combe B, Clermont O, Chau F, Mercier-Darty M, Denamur E, Nordmann P, Ricard JD, Decousser JW. Lack of association between colistin resistance and chlorhexidine reduced susceptibility in clinical isolates of Escherichia coli. J Antimicrob Chemother 2021; 76:2736-2737. [PMID: 34245272 DOI: 10.1093/jac/dkab235] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2021] [Accepted: 06/14/2021] [Indexed: 11/12/2022] Open
Affiliation(s)
- Guilhem Royer
- Université de Paris, IAME, UMR 1137, INSERM, 75018 Paris, France.,LABGeM, Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Université Paris-Saclay, 91000 Evry, France.,Département de Prévention, Diagnostic et Traitement des Infections, Hôpital Henri Mondor, APHP, 94000 Créteil, France
| | - Laurent Poirel
- Laboratoire Européen Associé INSERM, Emerging Antibiotic Resistance in Gram-Negative Bacteria, Emerging Antibiotic Resistance Unit, Medical and Molecular Microbiology, Faculty of Science and Medicine, University of Fribourg, Fribourg, Switzerland.,National Reference Centre for Emerging Antibiotic Resistance (NARA), Fribourg, Switzerland
| | - Béatrice La Combe
- Université de Paris, IAME, UMR 1137, INSERM, 75018 Paris, France.,APHP, Hôpital Louis Mourier, DMU ESPRIT, Service de Médecine Intensive Réanimation, 92700 Colombes, France.,Service de Réanimation polyvalente, Hôpital du Scorff - Groupe Hospitalier Bretagne Sud Lorient, 5 Avenue Choiseul, 56322 Lorient, France
| | - Olivier Clermont
- Université de Paris, IAME, UMR 1137, INSERM, 75018 Paris, France
| | - Françoise Chau
- Université de Paris, IAME, UMR 1137, INSERM, 75018 Paris, France
| | - Mélanie Mercier-Darty
- Département de Prévention, Diagnostic et Traitement des Infections, Hôpital Henri Mondor, APHP, 94000 Créteil, France
| | - Erick Denamur
- Université de Paris, IAME, UMR 1137, INSERM, 75018 Paris, France.,Laboratoire de Génétique Moléculaire, Hôpital Bichat, APHP, 75018 Paris, France
| | - Patrice Nordmann
- Laboratoire Européen Associé INSERM, Emerging Antibiotic Resistance in Gram-Negative Bacteria, Emerging Antibiotic Resistance Unit, Medical and Molecular Microbiology, Faculty of Science and Medicine, University of Fribourg, Fribourg, Switzerland.,National Reference Centre for Emerging Antibiotic Resistance (NARA), Fribourg, Switzerland
| | - Jean-Damien Ricard
- Université de Paris, IAME, UMR 1137, INSERM, 75018 Paris, France.,APHP, Hôpital Louis Mourier, DMU ESPRIT, Service de Médecine Intensive Réanimation, 92700 Colombes, France
| | - Jean-Winoc Decousser
- Département de Prévention, Diagnostic et Traitement des Infections, Hôpital Henri Mondor, APHP, 94000 Créteil, France.,EA 7380 Dynamyc, Université Paris-Est Créteil, 94000 Créteil, France
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6
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Zhao T, Wu X, Zhang Q, Li C, Worthington HV, Hua F. Oral hygiene care for critically ill patients to prevent ventilator-associated pneumonia. Cochrane Database Syst Rev 2020; 12:CD008367. [PMID: 33368159 PMCID: PMC8111488 DOI: 10.1002/14651858.cd008367.pub4] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
BACKGROUND Ventilator-associated pneumonia (VAP) is defined as pneumonia developing in people who have received mechanical ventilation for at least 48 hours. VAP is a potentially serious complication in these patients who are already critically ill. Oral hygiene care (OHC), using either a mouthrinse, gel, swab, toothbrush, or combination, together with suction of secretions, may reduce the risk of VAP in these patients. OBJECTIVES To assess the effects of oral hygiene care (OHC) on incidence of ventilator-associated pneumonia in critically ill patients receiving mechanical ventilation in hospital intensive care units (ICUs). SEARCH METHODS Cochrane Oral Health's Information Specialist searched the following databases: Cochrane Oral Health's Trials Register (to 25 February 2020), the Cochrane Central Register of Controlled Trials (CENTRAL) (the Cochrane Library, 2020, Issue 1), MEDLINE Ovid (1946 to 25 February 2020), Embase Ovid (1980 to 25 February 2020), LILACS BIREME Virtual Health Library (1982 to 25 February 2020) and CINAHL EBSCO (1937 to 25 February 2020). We also searched the VIP Database (January 2012 to 8 March 2020). The US National Institutes of Health Trials Registry (ClinicalTrials.gov) and the World Health Organization International Clinical Trials Registry Platform were searched for ongoing trials. No restrictions were placed on the language or date of publication when searching the electronic databases. SELECTION CRITERIA We included randomised controlled trials (RCTs) evaluating the effects of OHC (mouthrinse, gel, swab, toothbrush or combination) in critically ill patients receiving mechanical ventilation for at least 48 hours. DATA COLLECTION AND ANALYSIS At least two review authors independently assessed search results, extracted data and assessed risk of bias in included studies. We contacted study authors for additional information. We reported risk ratio (RR) for dichotomous outcomes and mean difference (MD) for continuous outcomes, using the random-effects model of meta-analysis when data from four or more trials were combined. MAIN RESULTS We included 40 RCTs (5675 participants), which were conducted in various countries including China, USA, Brazil and Iran. We categorised these RCTs into five main comparisons: chlorhexidine (CHX) mouthrinse or gel versus placebo/usual care; CHX mouthrinse versus other oral care agents; toothbrushing (± antiseptics) versus no toothbrushing (± antiseptics); powered versus manual toothbrushing; and comparisons of other oral care agents used in OHC (other oral care agents versus placebo/usual care, or head-to-head comparisons between other oral care agents). We assessed the overall risk of bias as high in 31 trials and low in two, with the rest being unclear. Moderate-certainty evidence from 13 RCTs (1206 participants, 92% adults) shows that CHX mouthrinse or gel, as part of OHC, probably reduces the incidence of VAP compared to placebo or usual care from 26% to about 18% (RR 0.67, 95% confidence intervals (CI) 0.47 to 0.97; P = 0.03; I2 = 66%). This is equivalent to a number needed to treat for an additional beneficial outcome (NNTB) of 12 (95% CI 7 to 128), i.e. providing OHC including CHX for 12 ventilated patients in intensive care would prevent one patient developing VAP. There was no evidence of a difference between interventions for the outcomes of mortality (RR 1.03, 95% CI 0.80 to 1.33; P = 0.86, I2 = 0%; 9 RCTs, 944 participants; moderate-certainty evidence), duration of mechanical ventilation (MD -1.10 days, 95% CI -3.20 to 1.00 days; P = 0.30, I2 = 74%; 4 RCTs, 594 participants; very low-certainty evidence) or duration of intensive care unit (ICU) stay (MD -0.89 days, 95% CI -3.59 to 1.82 days; P = 0.52, I2 = 69%; 5 RCTs, 627 participants; low-certainty evidence). Most studies did not mention adverse effects. One study reported adverse effects, which were mild, with similar frequency in CHX and control groups and one study reported there were no adverse effects. Toothbrushing (± antiseptics) may reduce the incidence of VAP (RR 0.61, 95% CI 0.41 to 0.91; P = 0.01, I2 = 40%; 5 RCTs, 910 participants; low-certainty evidence) compared to OHC without toothbrushing (± antiseptics). There is also some evidence that toothbrushing may reduce the duration of ICU stay (MD -1.89 days, 95% CI -3.52 to -0.27 days; P = 0.02, I2 = 0%; 3 RCTs, 749 participants), but this is very low certainty. Low-certainty evidence did not show a reduction in mortality (RR 0.84, 95% CI 0.67 to 1.05; P = 0.12, I2 = 0%; 5 RCTs, 910 participants) or duration of mechanical ventilation (MD -0.43, 95% CI -1.17 to 0.30; P = 0.25, I2 = 46%; 4 RCTs, 810 participants). AUTHORS' CONCLUSIONS Chlorhexidine mouthwash or gel, as part of OHC, probably reduces the incidence of developing ventilator-associated pneumonia (VAP) in critically ill patients from 26% to about 18%, when compared to placebo or usual care. We did not find a difference in mortality, duration of mechanical ventilation or duration of stay in the intensive care unit, although the evidence was low certainty. OHC including both antiseptics and toothbrushing may be more effective than OHC with antiseptics alone to reduce the incidence of VAP and the length of ICU stay, but, again, the evidence is low certainty. There is insufficient evidence to determine whether any of the interventions evaluated in the studies are associated with adverse effects.
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Affiliation(s)
- Tingting Zhao
- Hubei-MOST KLOS & KLOBM, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Xinyu Wu
- Hubei-MOST KLOS & KLOBM, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Qi Zhang
- Department of Oral Implantology, The Affiliated Stomatology Hospital, Zhejiang University School of Medicine, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Hangzhou, China
| | - Chunjie Li
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Head and Neck Oncology, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Helen V Worthington
- Cochrane Oral Health, Division of Dentistry, School of Medical Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, UK
| | - Fang Hua
- Hubei-MOST KLOS & KLOBM, School and Hospital of Stomatology, Wuhan University, Wuhan, China
- Division of Dentistry, School of Medical Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, UK
- Centre for Evidence-Based Stomatology, School and Hospital of Stomatology, Wuhan University, Wuhan, China
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7
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Vieira PC, de Oliveira RB, da Silva Mendonça TM. Should oral chlorhexidine remain in ventilator-associated pneumonia prevention bundles? Med Intensiva 2020; 46:S0210-5691(20)30325-9. [PMID: 33160703 DOI: 10.1016/j.medin.2020.09.009] [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] [Received: 06/15/2020] [Revised: 08/15/2020] [Accepted: 09/23/2020] [Indexed: 12/12/2022]
Abstract
Ventilator-associated pneumonia (VAP) is related with high mortality, duration of mechanical ventilation and costs. Recent studies have questioned the safety and effectiveness of oral chlorhexidine to prevent VAP. We sought to verify whether the adverse effects of this substance outweigh its benefits. We searched several databases and selected studies that investigated the use of oral chlorhexidine and its impact on mortality. No association between oral chlorhexidine and lower VAP rates was found on meta-analyses of double-blind randomized trials, however significant increase in mortality was reported. It is speculated that chlorhexidine can cause damage to several organic sectors and cytotoxicity. Although it still can be beneficial in specific settings, robust evidence to recommend its routine application for all mechanically ventilated patients is lacking; therefore, given the possibility of harm, it would be better to follow the principle of non-maleficence until more studies becomes available.
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Affiliation(s)
- P C Vieira
- Intensive Care Unit, Uberlândia Clinical Hospital, Uberlândia Federal University, Uberlândia, Minas Gerais, Brazil; Health Science PhD Program, Faculty of Medicine, Uberlândia Federal University, Uberlândia, Minas Gerais, Brazil; Neurointensivism Postgraduate Program, Teaching and Research Institute, Sírio-Libanês Hospital, Bela Vista, São Paulo, Brazil.
| | - R B de Oliveira
- Intensive Care Unit, Uberlândia Clinical Hospital, Uberlândia Federal University, Uberlândia, Minas Gerais, Brazil
| | - T M da Silva Mendonça
- Health Science PhD Program, Faculty of Medicine, Uberlândia Federal University, Uberlândia, Minas Gerais, Brazil
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8
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Labeau SO, Conoscenti E, Blot SI. Less daily oral hygiene is more in the ICU: not sure. Intensive Care Med 2020; 47:334-336. [PMID: 32239243 PMCID: PMC7222041 DOI: 10.1007/s00134-020-06021-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Accepted: 03/20/2020] [Indexed: 10/29/2022]
Affiliation(s)
- S O Labeau
- Nursing Department, Faculty of Education, Health and Social Work, HOGENT University of Applied Sciences and Arts, Ghent, Belgium.
| | - E Conoscenti
- Infection Control Department, Mediterranean Institute for Transplantation and Advanced Specialized Therapies (ISMETT), Palermo, Italy
| | - S I Blot
- Department of Internal Medicine and Pediatrics, Ghent University, Ghent, Belgium
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9
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Oropharyngeal Bacterial Colonization after Chlorhexidine Mouthwash in Mechanically Ventilated Critically Ill Patients. Anesthesiology 2019; 129:1140-1148. [PMID: 30247201 DOI: 10.1097/aln.0000000000002451] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
WHAT WE ALREADY KNOW ABOUT THIS TOPIC WHAT THIS ARTICLE TELLS US THAT IS NEW: BACKGROUND:: Oropharyngeal care with chlorhexidine to prevent ventilator-associated pneumonia is currently questioned, and exhaustive microbiologic data assessing its efficacy are lacking. The authors therefore aimed to study the effect of chlorhexidine mouthwash on oropharyngeal bacterial growth, to determine chlorhexidine susceptibility of these bacteria, and to measure chlorhexidine salivary concentration after an oropharyngeal care. METHODS This observational, prospective, single-center study enrolled 30 critically ill patients under mechanical ventilation for over 48 h. Oropharyngeal contamination was assessed by swabbing the gingivobuccal sulcus immediately before applying 0.12% chlorhexidine with soaked swabs, and subsequently at 15, 60, 120, 240, and 360 min after. Bacterial growth and identification were performed, and chlorhexidine minimal inhibitory concentration of recovered pathogens was determined. Saliva was collected in 10 patients, at every timepoint, with an additional timepoint after 30 min, to measure chlorhexidine concentration. RESULTS Two hundred fifty bacterial samples were analyzed and identified 48 pathogens including Streptococci (27.1%) and Enterobacteriaceae (20.8%). Oropharyngeal contamination before chlorhexidine mouthwash ranged from 10 to 10 colony-forming units (CFU)/ml in the 30 patients (median contamination level: 2.5·10 CFU/ml), and remained between 8·10 (lowest) and 3·10 CFU/ml (highest count) after chlorhexidine exposure. These bacterial counts did not decrease overtime after chlorhexidine mouthwash (each minute increase in time resulted in a multiplication of bacterial count by a coefficient of 1.001, P = 0.83). Viridans group streptococci isolates had the lowest chlorhexidine minimal inhibitory concentration (4 [4 to 8] mg/l); Enterobacteriaceae isolates had the highest ones (32 [16 to 32] mg/l). Chlorhexidine salivary concentration rapidly decreased, reaching 7.6 [1.8 to 31] mg/l as early as 60 min after mouthwash. CONCLUSIONS Chlorhexidine oropharyngeal care does not seem to reduce bacterial oropharyngeal colonization in critically ill ventilated patients. Variable chlorhexidine minimal inhibitory concentrations along with low chlorhexidine salivary concentrations after mouthwash could explain this ineffectiveness, and thus question the use of chlorhexidine for ventilator-associated pneumonia prevention.
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10
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Dray S, Forel JM, Papazian L. What's new in the prevention of healthcare-associated infections using chlorhexidine gluconate-impregnated washcloths. Intensive Care Med 2018; 45:249-251. [PMID: 30478623 DOI: 10.1007/s00134-018-5354-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Accepted: 08/21/2018] [Indexed: 10/27/2022]
Affiliation(s)
- Sandrine Dray
- Centre d'Etudes et de Recherches sur les Services de Santé et qualité de vie EA3279; APHM, Hôpital Nord, Médecine Intensive-Réanimation, Aix-Marseille Université, Chemin des Bourrely, 13015, Marseille, France
| | - Jean-Marie Forel
- Centre d'Etudes et de Recherches sur les Services de Santé et qualité de vie EA3279; APHM, Hôpital Nord, Médecine Intensive-Réanimation, Aix-Marseille Université, Chemin des Bourrely, 13015, Marseille, France
| | - Laurent Papazian
- Centre d'Etudes et de Recherches sur les Services de Santé et qualité de vie EA3279; APHM, Hôpital Nord, Médecine Intensive-Réanimation, Aix-Marseille Université, Chemin des Bourrely, 13015, Marseille, France.
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11
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Messika J, La Combe B, Ricard JD. Oropharyngeal colonization: epidemiology, treatment and ventilator-associated pneumonia prevention. ANNALS OF TRANSLATIONAL MEDICINE 2018; 6:426. [PMID: 30581834 DOI: 10.21037/atm.2018.10.17] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Oropharyngeal (OP) colonization and ventilator-associated pneumonia (VAP) mechanisms are tightly linked. A significant within-population variation in OP colonization has been described, with its composition being dependent from patients' severity. For instance, healthy subjects have a very low rate in Gram-negative bacteria (GNB) colonization, while its rate rises in comorbid patients, reaching high proportions in ICU patients. Various factors can be put forward to explain the modifications of hospital acquired OP. ICU patients might suffer from underlying diseases; the gastric reflux induced by the presence of nasogastric tubes and the patients' position influences OP colonization; salivary composition might influence OP content, as it modulates bacterial adhesion and induces reversible bacterial changes enhancing bacterial binding. The transition from OP colonization to VAP has been shown in numerous studies, with the digestive tract acting as a filter, or as a reservoir. Some therapies have been investigated to modulate OP colonization, in order to reduce the risk for VAP. Among those, mammalian antimicrobial peptides have been shown effective in reducing GNB colonization in healthy subjects, but failed in preventing VAP in ICU patients. The widely used chlorhexidine was tested in numerous trials. Data on its efficacy are conflicting, and meta-analyses yield discordant results. Above all, several drawbacks have aroused: a poor tolerance of concentrated solutions; an increased risk of death in the less severe patients; and a reduced susceptibility towards chlorhexidine of number of VAP pathogens. Proanthocyanidins, used to prevent Escherichia coli adhesion to the urothelium, have been tested in mice model of pneumonia with interesting results. Some complementary data are needed before moving to clinical research. Future research paths should include a reappraisal of OP colonization; finding better formulations for chlorhexidine; define the best populations to target oral decontamination and developing other strategies to prevent and treat OP colonization.
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Affiliation(s)
- Jonathan Messika
- Medical-Surgical Intensive Care Unit, Hôpital Louis Mourier, AP-HP, Colombes, France.,Univ Paris Diderot, Sorbonne Paris Cité, IAME, UMR 1137, Paris, France.,INSERM, IAME, UMR 1137, Paris, France
| | - Béatrice La Combe
- Medical-Surgical Intensive Care Unit, Hôpital Louis Mourier, AP-HP, Colombes, France.,Univ Paris Diderot, Sorbonne Paris Cité, IAME, UMR 1137, Paris, France.,INSERM, IAME, UMR 1137, Paris, France.,Intensive Care Unit, Lorient Hospital, Lorient, France
| | - Jean-Damien Ricard
- Medical-Surgical Intensive Care Unit, Hôpital Louis Mourier, AP-HP, Colombes, France.,Univ Paris Diderot, Sorbonne Paris Cité, IAME, UMR 1137, Paris, France.,INSERM, IAME, UMR 1137, Paris, France
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12
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Bouadma L, Klompas M. Oral care with chlorhexidine: beware! Intensive Care Med 2018; 44:1153-1155. [DOI: 10.1007/s00134-018-5221-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Accepted: 05/08/2018] [Indexed: 12/18/2022]
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13
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Ricard JD, Lisboa T. Caution for chlorhexidine gluconate use for oral care: insufficient data. Intensive Care Med 2018; 44:1162-1164. [PMID: 29766214 DOI: 10.1007/s00134-018-5217-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Accepted: 05/05/2018] [Indexed: 11/26/2022]
Affiliation(s)
- Jean-Damien Ricard
- Service de Réanimation Médico-Chirurgicale, Médecine Intensive et Réanimation, Hôpital Louis Mourier, AP-HP, 92700, Paris, Colombes, France.
- UMR 1137, IAME, INSERM, Paris, France.
- UMR 1137, IAME, Université Paris Diderot, Sorbonne Paris Cité, Paris, France.
| | - Thiago Lisboa
- Critical Care Department and Infection Control Committee, Hospital de Clinicas de Porto Alegre, Rua Ramiro Barcelos, 2350, Porto Alegre, CEP 90035-903, Brazil.
- Programa de Pos-Graduacao em Ciencias Pneumologicas, Universidade Federal do Rio Grande do Sul - UFRGS, Porto Alegre, Brazil.
- Rede Institucional de Pesquisa e Inovacao em Medicina Intensiva, Santa Casa de Misericordia de Porto Alegre, Porto Alegre, Brazil.
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14
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D’Journo XB, Falcoz PE, Alifano M, Le Rochais JP, D’Annoville T, Massard G, Regnard JF, Icard P, Marty-Ane C, Trousse D, Doddoli C, Orsini B, Edouard S, Million M, Lesavre N, Loundou A, Baumstarck K, Peyron F, Honoré S, Dizier S, Charvet A, Leone M, Raoult D, Papazian L, Thomas PA. Oropharyngeal and nasopharyngeal decontamination with chlorhexidine gluconate in lung cancer surgery: a randomized clinical trial. Intensive Care Med 2018; 44:578-587. [DOI: 10.1007/s00134-018-5156-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Accepted: 03/28/2018] [Indexed: 12/18/2022]
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