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Chetouane Y, Dubourg G, Gallian P, Delerce J, Levasseur A, Flaudrops C, Chabrière E, Chiaroni J, Raoult D, Camoin-Jau L. In vitro detection of bacterial contamination in platelet concentrates by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry: a preliminary study. J Med Microbiol 2017; 66:1523-1530. [PMID: 28984240 DOI: 10.1099/jmm.0.000533] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
PURPOSE Platelet concentrates are at risk of transfusion-related sepsis. The microbial detection methods currently available have reached their limits, as they do not completely prevent transfusion-related bacterial contamination.The aim of this study was to develop a new strategy to detect the risk of platelet transfusion-related bacterial contamination using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS). METHODOLOGY In vitro, platelet concentrates were seeded with known concentrations of bacterial strains. Protein mass profiles were acquired by using a Microflex MALDI-TOF instrument. Dedicated 'Platelet' software was used as a spectrum subtraction tool to reveal specific peaks caused by the presence of pathogens in samples. RESULTS The MALDI-TOF spectra of platelets were characterized and the reproducibility over time, regardless of the blood donor, was demonstrated with a positive predictive value of 100 %. In addition, the negative predictive value of the total number of specific peaks to predict contamination was 100 %. CONCLUSION Detecting bacteria in platelet concentrates using the MALDI-TOF approach and analysing spectra with the Platelet software present the advantage of combining the precocity of results and sufficient sensitivity (10 c.f.u. ml-1). Further research will be conducted to compare this novel method with the current conventional method in order to validate our results, the objective being to reduce the risk of platelet transfusion-related bacterial contamination.
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Affiliation(s)
- Yasmine Chetouane
- Aix-Marseille Université, Institut Hospitalo-Universitaire (IHU) Méditerranée Infection, Unité de Recherche sur les Maladies Infectieuses et Tropicales Emergentes (URMITE), Faculté de Médecine, CNRS UMR 7278, IRD 198, Marseille, France
| | - Gregory Dubourg
- Aix-Marseille Université, Institut Hospitalo-Universitaire (IHU) Méditerranée Infection, Unité de Recherche sur les Maladies Infectieuses et Tropicales Emergentes (URMITE), Faculté de Médecine, CNRS UMR 7278, IRD 198, Marseille, France
| | - Pierre Gallian
- Aix-Marseille Université, Institut Hospitalo-Universitaire (IHU) Méditerranée Infection, Unité de Recherche sur les Maladies Infectieuses et Tropicales Emergentes (URMITE), Faculté de Médecine, CNRS UMR 7278, IRD 198, Marseille, France.,Etablissement Français du Sang (EFS), La Plaine Saint-Denis, France
| | - Jeremy Delerce
- Aix-Marseille Université, Institut Hospitalo-Universitaire (IHU) Méditerranée Infection, Unité de Recherche sur les Maladies Infectieuses et Tropicales Emergentes (URMITE), Faculté de Médecine, CNRS UMR 7278, IRD 198, Marseille, France
| | - Anthony Levasseur
- Aix-Marseille Université, Institut Hospitalo-Universitaire (IHU) Méditerranée Infection, Unité de Recherche sur les Maladies Infectieuses et Tropicales Emergentes (URMITE), Faculté de Médecine, CNRS UMR 7278, IRD 198, Marseille, France
| | - Christophe Flaudrops
- Aix-Marseille Université, Institut Hospitalo-Universitaire (IHU) Méditerranée Infection, Unité de Recherche sur les Maladies Infectieuses et Tropicales Emergentes (URMITE), Faculté de Médecine, CNRS UMR 7278, IRD 198, Marseille, France
| | - Eric Chabrière
- Aix-Marseille Université, Institut Hospitalo-Universitaire (IHU) Méditerranée Infection, Unité de Recherche sur les Maladies Infectieuses et Tropicales Emergentes (URMITE), Faculté de Médecine, CNRS UMR 7278, IRD 198, Marseille, France
| | - Jacques Chiaroni
- Etablissement Français du Sang (EFS), La Plaine Saint-Denis, France.,Aix-Marseille Université, CNRS, EFS, ADES UMR 7268, Marseille, France
| | - Didier Raoult
- Aix-Marseille Université, Institut Hospitalo-Universitaire (IHU) Méditerranée Infection, Unité de Recherche sur les Maladies Infectieuses et Tropicales Emergentes (URMITE), Faculté de Médecine, CNRS UMR 7278, IRD 198, Marseille, France
| | - Laurence Camoin-Jau
- AP-HM, Laboratoire d'Hématologie, CHU Timone, Marseille, France.,Aix-Marseille Université, Institut Hospitalo-Universitaire (IHU) Méditerranée Infection, Unité de Recherche sur les Maladies Infectieuses et Tropicales Emergentes (URMITE), Faculté de Médecine, CNRS UMR 7278, IRD 198, Marseille, France
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Störmer M, Vollmer T. Diagnostic methods for platelet bacteria screening: current status and developments. ACTA ACUST UNITED AC 2013; 41:19-27. [PMID: 24659944 DOI: 10.1159/000357651] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2013] [Accepted: 11/20/2013] [Indexed: 11/19/2022]
Abstract
Bacterial contamination of blood components and the prevention of transfusion-associated bacterial infection still remains a major challenge in transfusion medicine. Over the past few decades, a significant reduction in the transmission of viral infections has been achieved due to the introduction of mandatory virus screening. Platelet concentrates (PCs) represent one of the highest risks for bacterial infection. This is due to the required storage conditions for PCs in gas-permeable containers at room temperature with constant agitation, which support bacterial proliferation from low contamination levels to high titers. In contrast to virus screening, since 1997 in Germany bacterial testing of PCs is only performed as a routine quality control or, since 2008, to prolong the shelf life to 5 days. In general, bacterial screening of PCs by cultivation methods is implemented by the various blood services. Although these culturing systems will remain the gold standard, the significance of rapid methods for screening for bacterial contamination has increased over the last few years. These new methods provide powerful tools for increasing the bacterial safety of blood components. This article summarizes the course of policies and provisions introduced to increase bacterial safety of blood components in Germany. Furthermore, we give an overview of the different diagnostic methods for bacterial screening of PCs and their current applicability in routine screening processes.
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Affiliation(s)
- Melanie Störmer
- Institut für Transfusionsmedizin, Blutspendezentrale, Universitätsklinikum Köln, Bad Oeynhausen, Germany
| | - Tanja Vollmer
- Institut für Laboratoriums- und Transfusionsmedizin, Herz- und Diabeteszentrum Nordrhein-Westfalen, Universitätsklinik der Ruhr-Universität Bochum, Bad Oeynhausen, Germany
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Schmidt M, Sireis W, Seifried E. Implementation of Bacterial Detection Methods into Blood Donor Screening - Overview of Different Technologies. ACTA ACUST UNITED AC 2011; 38:259-265. [PMID: 22016697 DOI: 10.1159/000330305] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2011] [Accepted: 06/08/2011] [Indexed: 11/19/2022]
Abstract
SUMMARY: BACKGROUND: Through the implementation of modern technology, such as nucleic acid testing, over the last two decades, blood safety has improved considerably in that the risk of viral infection is less than 1 in a million blood transfusions. By contrast, the residual risk of transfusion-associated bacterial infection is stable at approximately 1 in 2,000 to 1 in 3,000 in platelets. To improve blood safety with regard to bacterial infections, many countries have implemented bacterial screening methods as part of their blood donor screening programmes. METHODS: BACTERIAL DETECTION METHODS ARE CLUSTERED INTO THREE GROUPS: i) culture methods in combination with the 'negative-to-date' concept, ii) rapid detection systems with a late sample collection, and iii) bedside screening tests. RESULTS: The culture methods are convincing because of their very high analytical sensitivity. Nevertheless, false-negative culture results and subsequent fatalities were reported in several countries. Rapid bacterial systems are characterised as having short testing time but reduced sensitivity. Sample errors are prevented by late sample collection. Finally, bedside tests reduce the risk for sample errors to a minimum, but testing outside of blood donation services may have risks for general testing failures. CONCLUSION: Bacterial screening of blood products, especially platelets, can be performed using a broad range of technologies. Each system exhibits advantages and disadvantages and offers only a temporary solution until a general pathogen inactivation technology is available for all blood components.
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Affiliation(s)
- Michael Schmidt
- German Red Cross, Institute for Transfusion Medicine and Immunohaematology, Johann Wolfgang Goethe University, Frankfurt/M., Germany
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Abstract
Bacterial contamination of platelet products, both single donor apheresis platelet units and whole blood-derived platelet pools, continues to occur despite preventive measures. While some advances have been made in decreasing the rate of bacterial contamination of platelet units, particularly through diversion methods and early culture, a great deal remains to be done to eliminate the problem. Diversion methods have decreased contamination rates associated with skin commensal organisms. Culture methods are now widely used and many at-issue detection methods have been developed or are undergoing development. This article reviews the current developments and the challenges that remain to minimize and detect bacterial contamination of platelet products.
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