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Maruri-Aransolo A, de Dios Caballero J, Michelena M, Medina-Pascual MJ, Carrasco G, Asensio O, Cols M, Cantón R. Evaluation of CHROMagar™ B. cepacia agar for the detection of Burkholderia cepacia complex species from sputum samples of patients with cystic fibrosis. Eur J Clin Microbiol Infect Dis 2024; 43:1349-1353. [PMID: 38780755 PMCID: PMC11271321 DOI: 10.1007/s10096-024-04845-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2024] [Accepted: 05/03/2024] [Indexed: 05/25/2024]
Abstract
INTRODUCTION Burkholderia cepacia complex (BCC) are non-fermenting Gram-negative bacteria that can chronically colonize the lungs of people with cystic fibrosis (pwCF), causing a severe and progressive respiratory failure, post-transplant complications and epidemic outbreaks. Therefore, rapid and accurate identification of these bacteria is relevant for pwCF, in order to facilitate early eradication and prevent chronic colonization. However, BCCs are often quite difficult to detect on culture media as they have a slow growth rate and can be hidden by other fast-growing microorganisms, including Pseudomonas aeruginosa and filamentous fungi. MATERIAL AND METHODS We evaluated the sensitivity of CHROMagar™ B. cepacia agar using 11 isolates from a well-characterized BCC collection, using BCA agar (Oxoid, UK) as a gold standard. We also studied 180 clinical sputum samples to calculate positive (PPV) and negative (NPV) predictive values. Furthermore, we used three of the well-characterized BCC isolates to determine the limit of detection (LOD). RESULTS Eleven isolates grew on CHROMagar™ B. cepacia at 37ºC after 48 h. The NPV and PPV of CHROMagar™ B. cepacia were 100% and 87.5%, respectively. The LOD of CHROMagar™ B. cepacia was around 1 × 103 CFU/ml, requiring a ten-fold dilution lower bacterial load than BCA for BCC detection. CONCLUSION CHROMagar™ B. cepacia agar proved to have a very good sensitivity and specificity for the detection of clinical BCCs. Moreover, the chromogenic nature of the medium allowed us to clearly differentiate BCC from other Gram-negative species, filamentous fungi and yeasts, thereby facilitating the identification of contaminants.
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Affiliation(s)
- Ainhize Maruri-Aransolo
- Servicio de Microbiología, Hospital Universitario Ramón y Cajal and Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid, Spain
| | - Juan de Dios Caballero
- Servicio de Microbiología, Hospital Universitario Ramón y Cajal and Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid, Spain.
- CIBER de Enfermedades Infecciosas CIBERINFEC, Instituto de Salud Carlos III, Madrid, Spain.
| | - Malkoa Michelena
- Servicio de Microbiología, Hospital Universitario Ramón y Cajal and Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid, Spain
| | - María José Medina-Pascual
- Laboratorio de Referencia e Investigación en Taxonomía, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Majadahonda, Madrid, Spain
| | - Gema Carrasco
- Laboratorio de Referencia e Investigación en Taxonomía, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Majadahonda, Madrid, Spain
| | - Oscar Asensio
- Pediatric Pulmonology Unit, Consorci Corporació Sanitària Parc Taulí, Sabadell, Spain
| | - Maria Cols
- Pediatric Pulmonology Department and Cystic Fibrosis Unit, Hospital Sant Joan de Déu, Barcelona, Spain
| | - Rafael Cantón
- Servicio de Microbiología, Hospital Universitario Ramón y Cajal and Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid, Spain
- CIBER de Enfermedades Infecciosas CIBERINFEC, Instituto de Salud Carlos III, Madrid, Spain
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Gruzelle V, Guet-Revillet H, Segonds C, Bui S, Macey J, Chiron R, Michelet M, Murris-Espin M, Mittaine M. Management of initial colonisations with Burkholderia species in France, with retrospective analysis in five cystic fibrosis Centres: a pilot study. BMC Pulm Med 2020; 20:159. [PMID: 32503487 PMCID: PMC7275364 DOI: 10.1186/s12890-020-01190-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2019] [Accepted: 05/19/2020] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND Whereas Burkholderia infections are recognized to impair prognosis in cystic fibrosis (CF) patients, there is no recommendation to date for early eradication therapy. The aim of our study was to analyse the current management of initial colonisations with Burkholderia cepacia complex (BCC) or B. gladioli in French CF Centres and its impact on bacterial clearance and clinical outcome. METHODS We performed a retrospective review of the primary colonisations (PC), defined as newly positive sputum cultures, observed between 2010 and 2018 in five CF Centres. Treatment regimens, microbiological and clinical data were collected. RESULTS Seventeen patients (14 with BCC, and 3 with B. gladioli) were included. Eradication therapy, using heterogeneous combinations of intravenous, oral or nebulised antibiotics, was attempted in 11 patients. Six out of the 11 treated patients, and 4 out of the 6 untreated patients cleared the bacterium. Though not statistically significant, higher forced expiratory volume in 1 second and forced vital capacity at PC and consistency of treatment with in vitro antibiotic susceptibility tended to be associated with eradication. The management of PC was shown to be heterogeneous, thus impairing the statistical power of our study. Large prospective studies are needed to define whom to treat, when, and how. CONCLUSIONS Pending these studies, we propose, due to possible spontaneous clearance, to check the presence of Burkholderia 1 month after PC before starting antibiotics, at least in the milder cases, and to evaluate a combination of intravenous beta-lactam + oral or intravenous fluoroquinolone + inhaled aminoglycoside.
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Affiliation(s)
- Vianney Gruzelle
- CRCM pédiatrique, Service de Pneumo-Allergologie pédiatrique, Hôpital des Enfants, Centre Hospitalier Universitaire de Toulouse, 330 avenue de Grande-Bretagne - TSA 40031, 31059, Toulouse cedex 9, France
| | - Hélène Guet-Revillet
- Service de Bactériologie-Hygiène, Centre Hospitalier Universitaire de Toulouse, Toulouse, France
- Observatoire Burkholderia cepacia, Centre Hospitalier Universitaire de Toulouse, Toulouse, France / Vaincre la Mucoviscidose, Paris, France
| | - Christine Segonds
- Observatoire Burkholderia cepacia, Centre Hospitalier Universitaire de Toulouse, Toulouse, France / Vaincre la Mucoviscidose, Paris, France
| | - Stéphanie Bui
- CRCM pédiatrique, Service de pédiatrie médicale, Centre Hospitalier Universitaire de Bordeaux-GH Pellegrin, Bordeaux, France
| | - Julie Macey
- Service de pneumologie, Centre Hospitalier Universitaire de Bordeaux-GH Sud - Hôpital Haut-Lévêque, Pessac, France
| | - Raphaël Chiron
- CRCM pédiatrique, Service des maladies respiratoires, Centre Hospitalier Universitaire de Montpellier - Hôpital Arnaud de Villeneuve, Montpellier, France
| | - Marine Michelet
- CRCM pédiatrique, Service de Pneumo-Allergologie pédiatrique, Hôpital des Enfants, Centre Hospitalier Universitaire de Toulouse, 330 avenue de Grande-Bretagne - TSA 40031, 31059, Toulouse cedex 9, France
| | - Marlène Murris-Espin
- Service de pneumologie - Consultation Mucoviscidose, Pôle voies respiratoires, Centre Hospitalier Universitaire de Toulouse - Hôpital Larrey, Toulouse, France
| | - Marie Mittaine
- CRCM pédiatrique, Service de Pneumo-Allergologie pédiatrique, Hôpital des Enfants, Centre Hospitalier Universitaire de Toulouse, 330 avenue de Grande-Bretagne - TSA 40031, 31059, Toulouse cedex 9, France.
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Sýkorová P, Novotná J, Demo G, Pompidor G, Dubská E, Komárek J, Fujdiarová E, Houser J, Hároníková L, Varrot A, Shilova N, Imberty A, Bovin N, Pokorná M, Wimmerová M. Characterization of novel lectins from Burkholderia pseudomallei and Chromobacterium violaceum with seven-bladed β-propeller fold. Int J Biol Macromol 2020; 152:1113-1124. [DOI: 10.1016/j.ijbiomac.2019.10.200] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Revised: 10/22/2019] [Accepted: 10/23/2019] [Indexed: 01/08/2023]
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Medina-Pascual MJ, Monzón S, Villalón P, Cuesta I, González-Romo F, Valdezate S. Saezia sanguinis gen. nov., sp. nov., a Betaproteobacteria member of order Burkholderiales, isolated from human blood. Int J Syst Evol Microbiol 2020; 70:2016-2025. [PMID: 32003711 DOI: 10.1099/ijsem.0.004010] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The taxonomic position of an unknown bacterial strain designated CNM695-12, isolated from the blood of an immunocompromised subject, was investigated via phenotypic, chemotaxonomic, genotypic and genomic analyses. Bacterial cells were determined to be Gram-stain-negative bacilli, aerobic, non-motile and non-spore-forming. The strain showed catalase activity but no oxidase activity. Optimal growth occurred at 37 °C, pH 7 and with 0-1 % NaCl. C16 : 0, summed feature 8 (comprising C18 : 1ω7c /C18:1 ω6c), and C18 : 1ω9c were the most abundant fatty acids, and ubiquinone 8 was the major respiratory quinone. The polar lipids present included phosphatidylglycerol, phosphatidylethanolamine and other aminophospholipids. The 16S rRNA gene sequence showed approximately 93.5 % similarity to those of different species with validly published names within the order Burkholderiales (e.g. Leptothrix mobilis Feox-1T, Aquabacterium commune B8T , Aquabacterium citratiphilum B4T and Schlegelella thermodepolymerans K14T). Phylogenetic analyses based on 16S rRNA gene sequences and concatenated alignments including the sequences for 107 essential proteins, revealed the strain to form a novel lineage close to members of the family Comamonadaceae. The highest average nucleotide identity and average amino acid identity values were obtained with Schlegelella thermodepolymerans K14T (69.6 and 55.7 % respectively). The genome, with a size of 3.35 Mb, had a DNA G+C content of 52.4 mol% and encoded 3056 predicted genes, 3 rRNA, 1 transfer-messengerRNA and 51 tRNA. Strain CNM695-12 thus represents a novel species belonging to a novel genus within the order Burkholderiales, for which the name Saezia sanguinis gen. nov., sp. nov. is proposed. The type strain is CNM695-12T (=DSM 104959T=CECT 9208T).
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Affiliation(s)
- María J Medina-Pascual
- Laboratorio de Referencia e Investigación en Taxonomía. Centro Nacional de Microbiología. Instituto de Salud Carlos III, Majadahonda, Madrid, Spain
| | - Sara Monzón
- Unidad de Bioinformática (BU-ISCIII). Instituto de Salud Carlos III, Majadahonda, Madrid, Spain
| | - Pilar Villalón
- Laboratorio de Referencia e Investigación en Taxonomía. Centro Nacional de Microbiología. Instituto de Salud Carlos III, Majadahonda, Madrid, Spain
| | - Isabel Cuesta
- Unidad de Bioinformática (BU-ISCIII). Instituto de Salud Carlos III, Majadahonda, Madrid, Spain
| | | | - Sylvia Valdezate
- Laboratorio de Referencia e Investigación en Taxonomía. Centro Nacional de Microbiología. Instituto de Salud Carlos III, Majadahonda, Madrid, Spain
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Hassan AA, Coutinho CP, Sá-Correia I. Burkholderia cepacia Complex Species Differ in the Frequency of Variation of the Lipopolysaccharide O-Antigen Expression During Cystic Fibrosis Chronic Respiratory Infection. Front Cell Infect Microbiol 2019; 9:273. [PMID: 31417878 PMCID: PMC6686744 DOI: 10.3389/fcimb.2019.00273] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Accepted: 07/17/2019] [Indexed: 11/13/2022] Open
Abstract
Burkholderia cepacia complex (Bcc) bacteria can adapt to the lung environment of cystic fibrosis (CF) patients resulting in the emergence of a very difficult to eradicate heterogeneous population leading to chronic infections associated with rapid lung function loss and increased mortality. Among the important phenotypic modifications is the variation of the lipopolysaccharide (LPS) structure at level of the O-antigen (OAg) presence, influencing adherence, colonization and the ability to evade the host defense mechanisms. The present study was performed to understand whether the loss of OAg expression during CF infection can be considered a general phenomenon in different Bcc species favoring its chronicity. In fact, it is still not clear why different Bcc species/strains differ in their ability to persist in the CF lung and pathogenic potential. The systematic two-decade-retrospective-longitudinal-screening conducted covered 357 isolates retrieved from 19 chronically infected patients receiving care at a central hospital in Lisbon. The study involved 21 Bcc strains of six/seven Bcc species/lineages, frequently or rarely isolated from CF patients worldwide. Different strains/clonal variants obtained during infection gave rise to characteristic OAg-banding patterns. The two most prevalent and feared species, B. cenocepacia and B. multivorans, showed a tendency to lose the OAg along chronic infection. B. cenocepacia recA lineage IIIA strains known to lead to particularly destructive infections exhibit the most frequent OAg loss, compared with lineage IIIB. The switch frequency increased with the duration of infection and the level of lung function deterioration. For the first time, it is shown that the rarely found B. cepacia and B. contaminans, whose representation in the cohort of patients examined is abnormally high, keep the OAg even during 10- or 15-year infections. Data from co-infections with different Bcc species reinforced these conclusions. Concerning the two other rarely found species examined, B. stabilis exhibited a stable OAg expression phenotype over the infection period while for the single clone of the more distantly related B. dolosa species, the OAg-chain was absent from the beginning of the 5.5-year infection until the patient dead. This work reinforces the relevance attributed to the OAg-expression switch suggesting marked differences in the various Bcc species.
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Affiliation(s)
- A. Amir Hassan
- iBB - Institute for Bioengineering, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
- Department of Bioengineering, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - Carla P. Coutinho
- Department of Bioengineering, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - Isabel Sá-Correia
- iBB - Institute for Bioengineering, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
- Department of Bioengineering, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
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Goodlet KJ, Nailor MD, Omar A, Huang JL, LiPuma JJ, Walia R, Tokman S. Successful Lung Re-transplant in a Patient with Cepacia Syndrome due to Burkholderia ambifaria. J Cyst Fibros 2018; 18:e1-e4. [PMID: 30224331 DOI: 10.1016/j.jcf.2018.08.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Revised: 07/05/2018] [Accepted: 08/27/2018] [Indexed: 11/17/2022]
Abstract
Chronic airway inflammation and infection drive morbidity and mortality among patients with cystic fibrosis (CF). While Haemophilus influenzae and Staphylococcus aureus predominate in children, the prevalence of Pseudomonas aeruginosa increases as patients age. Other bacteria, including species within the Burkholderia cepacia complex (Bcc), are also more prevalent among adults with CF. Species within the Bcc accelerate lung function decline and can trigger development of "cepacia syndrome," both before and after lung transplantation. As a result, some centers advise against lung transplantation for Bcc-infected patients; however, little is known about the relative virulence of uncommon Bcc species. We describe a successful lung re-transplant in a patient with CF, chronic Burkholderia ambifaria airway infection, and cepacia syndrome.
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Affiliation(s)
- Kellie J Goodlet
- Department of Pharmacy Practice, College of Pharmacy, Midwestern University, Glendale, AZ, United States
| | - Michael D Nailor
- Deparment of Pharmacy Services, St. Joseph's Hospital and Medical Center, Phoenix, AZ, United States
| | - Ashraf Omar
- Division of Transplant Pulmonology, Norton Thoracic Institute, St. Joseph's Hospital and Medical Center, Phoenix, AZ, United States
| | - Jasmine L Huang
- Division of Transplant Surgery, Norton Thoracic Institute, St. Joseph's Hospital and Medical Center, Phoenix, AZ, United States
| | - John J LiPuma
- Department of Pediatrics and Communicable Diseases, University of Michigan Medical School, Ann Arbor, MI, United States
| | - Rajat Walia
- Division of Transplant Pulmonology, Norton Thoracic Institute, St. Joseph's Hospital and Medical Center, Phoenix, AZ, United States
| | - Sofya Tokman
- Division of Transplant Pulmonology, Norton Thoracic Institute, St. Joseph's Hospital and Medical Center, Phoenix, AZ, United States.
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Individual Patterns of Complexity in Cystic Fibrosis Lung Microbiota, Including Predator Bacteria, over a 1-Year Period. mBio 2017; 8:mBio.00959-17. [PMID: 28951476 PMCID: PMC5615197 DOI: 10.1128/mbio.00959-17] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Cystic fibrosis (CF) lung microbiota composition has recently been redefined by the application of next-generation sequencing (NGS) tools, identifying, among others, previously undescribed anaerobic and uncultivable bacteria. In the present study, we monitored the fluctuations of this ecosystem in 15 CF patients during a 1-year follow-up period, describing for the first time, as far as we know, the presence of predator bacteria in the CF lung microbiome. In addition, a new computational model was developed to ascertain the hypothetical ecological repercussions of a prey-predator interaction in CF lung microbial communities. Fifteen adult CF patients, stratified according to their pulmonary function into mild (n = 5), moderate (n = 9), and severe (n = 1) disease, were recruited at the CF unit of the Ramón y Cajal University Hospital (Madrid, Spain). Each patient contributed three or four induced sputum samples during a 1-year follow-up period. Lung microbiota composition was determined by both cultivation and NGS techniques and was compared with the patients’ clinical variables. Results revealed a particular microbiota composition for each patient that was maintained during the study period, although some fluctuations were detected without any clinical correlation. For the first time, Bdellovibrio and Vampirovibrio predator bacteria were shown in CF lung microbiota and reduced-genome bacterial parasites of the phylum Parcubacteria were also consistently detected. The newly designed computational model allows us to hypothesize that inoculation of predators into the pulmonary microbiome might contribute to the control of chronic colonization by CF pathogens in early colonization stages. The application of NGS to sequential samples of CF patients demonstrated the complexity of the organisms present in the lung (156 species) and the constancy of basic individual colonization patterns, although some differences between samples from the same patient were observed, probably related to sampling bias. Bdellovibrio and Vampirovibrio predator bacteria were found for the first time by NGS as part of the CF lung microbiota, although their ecological significance needs to be clarified. The newly designed computational model allows us to hypothesize that inoculation of predators into the lung microbiome can eradicate CF pathogens in early stages of the process. Our data strongly suggest that lower respiratory microbiome fluctuations are not necessarily related to the patient’s clinical status.
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da Costa Capizzani CP, Caçador NC, Torres LAGMM, Tonani L, Vandamme P, da Costa Darini AL. Clinical and microbiological profile of chronic Burkholderia cepacia complex infections in a cystic fibrosis reference hospital in Brazil. Eur J Clin Microbiol Infect Dis 2017; 36:2263-2271. [PMID: 28840370 DOI: 10.1007/s10096-017-3058-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Accepted: 07/03/2017] [Indexed: 01/09/2023]
Abstract
Burkholderia sp. infections are extremely complex in cystic fibrosis (CF) patients, especially considering the lack of knowledge regarding its behavior, its relationship with prognosis, as well as its transmissibility and multidrug resistance features. This study evaluated the frequency of chronic infection by Burkholderia, using microbiological and clinical data. Ninety-eight patients with CF attended from July 2011 to April 2014 in a Brazilian reference hospital were included. Antimicrobial activity, molecular epidemiology, Shwachman score, body mass index, exacerbations, and lung function were analyzed. Nine patients had chronic colonization, and all of them showed preserved pulmonary function levels, body mass index, and Shwachman score. Meropenem was the most effective antibiotic; however, divergent results were shown by other studies. Cross-contamination may have occurred in only two unrelated patients of different ages, who were colonized by B. vietnamiensis, which does not occur frequently. Twelve new sequence types (STs) were identified and three STs have presented intercontinental distribution. None of the patients presented known epidemic strains. In conclusion, a relatively low number of patients with chronic colonization and suspected cross-infection were identified. Different from other studies that have found CF patients chronically colonized with Burkholderia sp. having a greater deterioration of lung function, more frequent antibiotic therapy, and increased mortality, in the current study, the patients showed good clinical outcomes and favorable options for antibiotics therapy. This study also updated the epidemiological database, which facilitates the multicentric collaborative analysis and assists in the control of global infection by these pathogens.
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Affiliation(s)
- C P da Costa Capizzani
- Department of Clinical Analysis, Toxicological and Bromatological, Faculty of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - N C Caçador
- Department of Clinical Analysis, Toxicological and Bromatological, Faculty of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - L A G M M Torres
- Department of Pediatrics, Cystic Fibrosis Referral Service, Clinic Hospital of the Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - L Tonani
- Department of Clinical Analysis, Toxicological and Bromatological, Faculty of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - P Vandamme
- Laboratory of Microbiology, Ghent University, Ghent, Belgium
| | - A L da Costa Darini
- Department of Clinical Analysis, Toxicological and Bromatological, Faculty of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil. .,Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil.
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Chien YC, Liao CH, Sheng WH, Chien JY, Huang YT, Yu CJ, Hsueh PR. Clinical characteristics of bacteraemia caused by Burkholderia cepacia complex species and antimicrobial susceptibility of the isolates in a medical centre in Taiwan. Int J Antimicrob Agents 2017; 51:357-364. [PMID: 28705667 DOI: 10.1016/j.ijantimicag.2017.07.004] [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] [Received: 03/13/2017] [Revised: 06/21/2017] [Accepted: 07/01/2017] [Indexed: 01/02/2023]
Abstract
This study investigated the clinical characteristics and outcomes of bacteraemia due to Burkholderia cepacia complex (BCC) species among 54 patients without cystic fibrosis from January 2013 to February 2015. BCC isolates were identified to the species level by the Bruker Biotyper MALDI-TOF MS system and by sequencing analysis of the 16S rRNA and recA genes. Antimicrobial susceptibilities of the isolates were determined by the agar dilution method. Sequencing of the recA gene in the 54 blood isolates revealed 37 (68.5%) isolates of B. cenocepacia, 9 (16.7%) of B. cepacia, 4 (7.4%) of B. multivorans and one isolate each of B. arboris, B. pseudomultivorans, B. seminalis, and B. vietnamiensis. The overall performance of the Bruker Biotyper MALDI-TOF MS system for correctly identifying the 54 BCC isolates to the species level was 79.6%, which was better than that (16.7%) by 16S RNA sequencing analysis. Bacteraemic pneumonia (n = 23, 42.6%) and catheter-related bacteraemia (n = 21, 38.9%) were the most common types of infection. Higher rates of ceftazidime and meropenem resistance were found in B. cepacia isolates (33.3% and 22.2%, respectively) than in isolates of B. cenocepacia (21.6% and 10.8%, respectively) and other species (12.5% and 12.5%, respectively). Overall, the 30-day mortality rate was 38.9% (21/54). Bacteraemia caused by BCC species other than B. cenocepacia and B. cepacia (adjusted odds ratio [aOR] 20.005, P = 0.024) and high SOFA score (aOR 1.412, P = 0.003) were predictive of higher 30-day mortality. Different BCC species are associated with different outcomes of bacteraemia and exhibit different susceptibility patterns.
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Affiliation(s)
- Ying-Chun Chien
- Department of Internal Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan; Graduate Institute of Clinical Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Chun-Hsing Liao
- Department of Internal Medicine, Far Eastern Memorial Hospital, New Taipei City, Taiwan; Department of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Wang-Huei Sheng
- Department of Internal Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Jung-Yien Chien
- Department of Internal Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Yu-Tsung Huang
- Department of Internal Medicine, Far Eastern Memorial Hospital, New Taipei City, Taiwan; Department of Laboratory Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Chong-Jen Yu
- Department of Internal Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Po-Ren Hsueh
- Department of Internal Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan; Department of Laboratory Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan.
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Macrophages, but not neutrophils, are critical for proliferation of Burkholderia cenocepacia and ensuing host-damaging inflammation. PLoS Pathog 2017. [PMID: 28651010 PMCID: PMC5501683 DOI: 10.1371/journal.ppat.1006437] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Bacteria of the Burkholderia cepacia complex (Bcc) can cause devastating pulmonary infections in cystic fibrosis (CF) patients, yet the precise mechanisms underlying inflammation, recurrent exacerbations and transition from chronic stages to acute infection and septicemia are not known. Bcc bacteria are generally believed to have a predominant extracellular biofilm life style in infected CF lungs, similar to Pseudomonas aeruginosa, but this has been challenged by clinical observations which show Bcc bacteria predominantly in macrophages. More recently, Bcc bacteria have emerged in nosocomial infections of patients hospitalized for reasons unrelated to CF. Research has abundantly shown that Bcc bacteria can survive and replicate in mammalian cells in vitro, yet the importance of an intracellular life style during infection in humans is unknown. Here we studied the contribution of innate immune cell types to fatal pro-inflammatory infection caused by B. cenocepacia using zebrafish larvae. In strong contrast to the usual protective role for macrophages against microbes, our results show that these phagocytes significantly worsen disease outcome. We provide new insight that macrophages are critical for multiplication of B. cenocepacia in the host and for development of a fatal, pro-inflammatory response that partially depends on Il1-signalling. In contrast, neutrophils did not significantly contribute to disease outcome. In subcutaneous infections that are dominated by neutrophil-driven phagocytosis, the absence of a functional NADPH oxidase complex resulted in a small but measurably higher increase in bacterial growth suggesting the oxidative burst helps limit bacterial multiplication; however, neutrophils were unable to clear the bacteria. We suggest that paradigm-changing approaches are needed for development of novel antimicrobials to efficiently disarm intracellular bacteria of this group of highly persistent, opportunistic pathogens.
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Kenna DTD, Lilley D, Coward A, Martin K, Perry C, Pike R, Hill R, Turton JF. Prevalence of Burkholderia species, including members of Burkholderia cepacia complex, among UK cystic and non-cystic fibrosis patients. J Med Microbiol 2017; 66:490-501. [PMID: 28463663 DOI: 10.1099/jmm.0.000458] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
PURPOSE We aimed to establish the prevalence of different Burkholderia species among UK cystic fibrosis (CF) and non-CF patients over a 2 year period. METHODOLOGY Matrix-assisted laser desorption/ionization-time of flight mass spectrometry was used to identify isolates to genus level, followed by recA/gyrB sequence clustering or species-specific PCR. In all, 1047 Burkholderia isolates were submitted for identification from 361 CF patients and 112 non-CF patients, 25 from the hospital environment and three from a commercial company. Potential cross-infection was assessed by pulsed-field gel electrophoresis (PFGE) and multi- locus-sequence typing (MLST). MICs were determined for 161 Burkholderia cepacia complex (Bcc) isolates. CF Trust registry data were sought to examine clinical parameters relating to Bcc infection. RESULTS Burkholderia multivorans was the most prevalent species among CF patients affecting 56 % (192) patients, followed by Burkholderia cenocepacia IIIA (15 %; 52 patients). Five novel recA clusters were found. Among non-CF patients, Burkholderia cepacia was the most prevalent species (37/112; 34 %), with 18 of 40 isolates part of a UK-wide B. cepacia 'cluster'. This and three other clusters were investigated by PFGE and MLST. Cable-pili positive isolates included two novel sequence types and representatives of ET12. Antibiotic susceptibility varied between and within species and CF/non- CF isolates. CF Trust registry data suggested no significant difference in lung function between patients harbouring B. cenocepacia, B. multivorans and other Bcc species (P=0.81). CONCLUSION The dominance of B. multivorans in CF, the presence of a B. cepacia cluster among non-CF patients and the existence of putative novel species all highlighted the continuing role of Burkholderia species as opportunistic pathogens.
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Affiliation(s)
- Dervla T D Kenna
- Antimicrobial Resistance and Healthcare Associated Infections (AMRHAI) Reference Unit, National Infection Service, Public Health England, 61 Colindale Avenue, London NW9 5EQ, UK
| | - Daniel Lilley
- Antimicrobial Resistance and Healthcare Associated Infections (AMRHAI) Reference Unit, National Infection Service, Public Health England, 61 Colindale Avenue, London NW9 5EQ, UK
| | - Amy Coward
- Antimicrobial Resistance and Healthcare Associated Infections (AMRHAI) Reference Unit, National Infection Service, Public Health England, 61 Colindale Avenue, London NW9 5EQ, UK
| | - Kate Martin
- Antimicrobial Resistance and Healthcare Associated Infections (AMRHAI) Reference Unit, National Infection Service, Public Health England, 61 Colindale Avenue, London NW9 5EQ, UK
| | - Claire Perry
- Antimicrobial Resistance and Healthcare Associated Infections (AMRHAI) Reference Unit, National Infection Service, Public Health England, 61 Colindale Avenue, London NW9 5EQ, UK
| | - Rachel Pike
- Antimicrobial Resistance and Healthcare Associated Infections (AMRHAI) Reference Unit, National Infection Service, Public Health England, 61 Colindale Avenue, London NW9 5EQ, UK
| | - Robert Hill
- Antimicrobial Resistance and Healthcare Associated Infections (AMRHAI) Reference Unit, National Infection Service, Public Health England, 61 Colindale Avenue, London NW9 5EQ, UK
| | - Jane F Turton
- Antimicrobial Resistance and Healthcare Associated Infections (AMRHAI) Reference Unit, National Infection Service, Public Health England, 61 Colindale Avenue, London NW9 5EQ, UK
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Shahcheraghi F, Aslani MM, Mahmoudi H, Karimitabar Z, Solgi H, Bahador A, Alikhani MY. Molecular study of carbapenemase genes in clinical isolates of Enterobacteriaceae resistant to carbapenems and determining their clonal relationship using pulsed-field gel electrophoresis. J Med Microbiol 2017; 66:570-576. [DOI: 10.1099/jmm.0.000467] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Affiliation(s)
| | | | - Hassan Mahmoudi
- Department of Microbiology, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Zahra Karimitabar
- Department of Microbiology, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Hamid Solgi
- Department of Microbiology, Pasteur Institute of Iran, Tehran, Iran
| | - Abbas Bahador
- Department of Microbiology, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Yousef Alikhani
- Department of Microbiology, Hamadan University of Medical Sciences, Hamadan, Iran
- Brucellosis Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
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13
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Peeters C, Cooper VS, Hatcher PJ, Verheyde B, Carlier A, Vandamme P. Comparative genomics of Burkholderia multivorans, a ubiquitous pathogen with a highly conserved genomic structure. PLoS One 2017; 12:e0176191. [PMID: 28430818 PMCID: PMC5400248 DOI: 10.1371/journal.pone.0176191] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Accepted: 04/06/2017] [Indexed: 12/23/2022] Open
Abstract
The natural environment serves as a reservoir of opportunistic pathogens. A well-established method for studying the epidemiology of such opportunists is multilocus sequence typing, which in many cases has defined strains predisposed to causing infection. Burkholderia multivorans is an important pathogen in people with cystic fibrosis (CF) and its epidemiology suggests that strains are acquired from non-human sources such as the natural environment. This raises the central question of whether the isolation source (CF or environment) or the multilocus sequence type (ST) of B. multivorans better predicts their genomic content and functionality. We identified four pairs of B. multivorans isolates, representing distinct STs and consisting of one CF and one environmental isolate each. All genomes were sequenced using the PacBio SMRT sequencing technology, which resulted in eight high-quality B. multivorans genome assemblies. The present study demonstrated that the genomic structure of the examined B. multivorans STs is highly conserved and that the B. multivorans genomic lineages are defined by their ST. Orthologous protein families were not uniformly distributed among chromosomes, with core orthologs being enriched on the primary chromosome and ST-specific orthologs being enriched on the second and third chromosome. The ST-specific orthologs were enriched in genes involved in defense mechanisms and secondary metabolism, corroborating the strain-specificity of these virulence characteristics. Finally, the same B. multivorans genomic lineages occur in both CF and environmental samples and on different continents, demonstrating their ubiquity and evolutionary persistence.
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Affiliation(s)
| | - Vaughn S. Cooper
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States of America
| | - Philip J. Hatcher
- Department of Computer Science, University of New Hampshire, Durham, NH, United States of America
| | - Bart Verheyde
- Laboratory of Microbiology, Ghent University, Ghent, Belgium
| | | | - Peter Vandamme
- Laboratory of Microbiology, Ghent University, Ghent, Belgium
- * E-mail:
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14
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Roszniowski B, Latka A, Maciejewska B, Vandenheuvel D, Olszak T, Briers Y, Holt GS, Valvano MA, Lavigne R, Smith DL, Drulis-Kawa Z. The temperate Burkholderia phage AP3 of the Peduovirinae shows efficient antimicrobial activity against B. cenocepacia of the IIIA lineage. Appl Microbiol Biotechnol 2017; 101:1203-1216. [PMID: 27770178 PMCID: PMC5247547 DOI: 10.1007/s00253-016-7924-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Revised: 10/02/2016] [Accepted: 10/09/2016] [Indexed: 01/17/2023]
Abstract
Burkholderia phage AP3 (vB_BceM_AP3) is a temperate virus of the Myoviridae and the Peduovirinae subfamily (P2likevirus genus). This phage specifically infects multidrug-resistant clinical Burkholderia cenocepacia lineage IIIA strains commonly isolated from cystic fibrosis patients. AP3 exhibits high pairwise nucleotide identity (61.7 %) to Burkholderia phage KS5, specific to the same B. cenocepacia host, and has 46.7-49.5 % identity to phages infecting other species of Burkholderia. The lysis cassette of these related phages has a similar organization (putative antiholin, putative holin, endolysin, and spanins) and shows 29-98 % homology between specific lysis genes, in contrast to Enterobacteria phage P2, the hallmark phage of this genus. The AP3 and KS5 lysis genes have conserved locations and high amino acid sequence similarity. The AP3 bacteriophage particles remain infective up to 5 h at pH 4-10 and are stable at 60 °C for 30 min, but are sensitive to chloroform, with no remaining infective particles after 24 h of treatment. AP3 lysogeny can occur by stable genomic integration and by pseudo-lysogeny. The lysogenic bacterial mutants did not exhibit any significant changes in virulence compared to wild-type host strain when tested in the Galleria mellonella moth wax model. Moreover, AP3 treatment of larvae infected with B. cenocepacia revealed a significant increase (P < 0.0001) in larvae survival in comparison to AP3-untreated infected larvae. AP3 showed robust lytic activity, as evidenced by its broad host range, the absence of increased virulence in lysogenic isolates, the lack of bacterial gene disruption conditioned by bacterial tRNA downstream integration site, and the absence of detected toxin sequences. These data suggest that the AP3 phage is a promising potent agent against bacteria belonging to the most common B. cenocepacia IIIA lineage strains.
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Affiliation(s)
- Bartosz Roszniowski
- Institute of Genetics and Microbiology, University of Wroclaw, Przybyszewskiego 63/77, 51-148, Wroclaw, Poland
| | - Agnieszka Latka
- Institute of Genetics and Microbiology, University of Wroclaw, Przybyszewskiego 63/77, 51-148, Wroclaw, Poland
| | - Barbara Maciejewska
- Institute of Genetics and Microbiology, University of Wroclaw, Przybyszewskiego 63/77, 51-148, Wroclaw, Poland
| | - Dieter Vandenheuvel
- Laboratory of Gene Technology, KU Leuven, Kasteelpark Arenberg 21, box 2462, 3001, Leuven, Belgium
| | - Tomasz Olszak
- Institute of Genetics and Microbiology, University of Wroclaw, Przybyszewskiego 63/77, 51-148, Wroclaw, Poland
| | - Yves Briers
- Laboratory of Gene Technology, KU Leuven, Kasteelpark Arenberg 21, box 2462, 3001, Leuven, Belgium
- Department of Applied Biosciences, Ghent University, Valentin Vaerwyckweg 1, 9000, Ghent, Belgium
| | - Giles S Holt
- Applied Sciences, University of Northumbria, Ellison Building EBD222, Newcastle upon Tyne, NE1 8ST, UK
| | - Miguel A Valvano
- Center for Experimental Medicine, Queen's University of Belfast, 97 Lisburn Rd., Belfast, BT9 7BL, UK
| | - Rob Lavigne
- Laboratory of Gene Technology, KU Leuven, Kasteelpark Arenberg 21, box 2462, 3001, Leuven, Belgium
| | - Darren L Smith
- Applied Sciences, University of Northumbria, Ellison Building EBD222, Newcastle upon Tyne, NE1 8ST, UK
| | - Zuzanna Drulis-Kawa
- Institute of Genetics and Microbiology, University of Wroclaw, Przybyszewskiego 63/77, 51-148, Wroclaw, Poland.
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Peeters C, Depoorter E, Praet J, Vandamme P. Extensive cultivation of soil and water samples yields various pathogens in patients with cystic fibrosis but not Burkholderia multivorans. J Cyst Fibros 2016; 15:769-775. [PMID: 26996269 DOI: 10.1016/j.jcf.2016.02.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Revised: 02/26/2016] [Accepted: 02/29/2016] [Indexed: 10/22/2022]
Abstract
BACKGROUND While the epidemiology of Burkholderia cepacia complex (Bcc) bacteria in cystic fibrosis (CF) patients suggests that Burkholderia multivorans is acquired from environmental sources, this species has rarely been isolated from soil and water samples. METHODS Multiple isolation strategies were applied to water and soil samples that were previously shown to be B. multivorans PCR positive. These included direct plating and liquid enrichment procedures and the use of selective media, acclimatizing recovery and co-cultivation with CF sputum. MALDI-TOF mass spectrometry and sequence analysis of 16S rRNA and housekeeping genes were used to identify all isolates. RESULTS None of the approaches yielded B. multivorans isolates. Other Burkholderia species, several Gram-negative non-fermenting bacteria (including Cupriavidus, Inquilinus, Pandoraea, Pseudomonas and Stenotrophomonas) and rapidly growing mycobacteria (including Mycobacterium chelonae) were all isolated from water and soil samples. CONCLUSIONS The use of Bcc isolation media yielded a surprisingly wide array of rare but often clinically relevant CF pathogens, confirming that soil and water are reservoirs of these infectious agents.
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Affiliation(s)
- Charlotte Peeters
- Laboratory of Microbiology, Ghent University, K. L. Ledeganckstraat 35, 9000 Ghent, Belgium.
| | - Eliza Depoorter
- Laboratory of Microbiology, Ghent University, K. L. Ledeganckstraat 35, 9000 Ghent, Belgium.
| | - Jessy Praet
- Laboratory of Microbiology, Ghent University, K. L. Ledeganckstraat 35, 9000 Ghent, Belgium.
| | - Peter Vandamme
- Laboratory of Microbiology, Ghent University, K. L. Ledeganckstraat 35, 9000 Ghent, Belgium.
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16
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Bronchopulmonary infection-colonization patterns in Spanish cystic fibrosis patients: Results from a national multicenter study. J Cyst Fibros 2015; 15:357-65. [PMID: 26429520 DOI: 10.1016/j.jcf.2015.09.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2015] [Revised: 09/04/2015] [Accepted: 09/09/2015] [Indexed: 02/01/2023]
Abstract
BACKGROUND Clinical and demographical knowledge on Spanish cystic fibrosis (CF) patients is incomplete as no national registry exists. CF-microbiology has not been studied at national level. The results of the first Spanish multicenter study on CF microbiology are presented. METHODS 24 CF-Units for adult (n=12) and pediatric (n=12) patients from 17 hospitals provided sputa and clinical data from 15 consecutive patients. Cultures and susceptibility testing were performed. Colonization impact on pulmonary function was assessed. RESULTS 341 patients [mean (SD) age 21 (11) years, 180≥18years, mean (SD) FEV1=68 (25)%] were included. Pseudomonas aeruginosa was reported as chronic, intermittent or absent in 46%, 22% and 32% of patients, respectively. The annual prevalence was 62%. Positive P. aeruginosa and methicillin-resistant Staphylococcus aureus cultures were significantly associated with lower FEV1 (p<0.001 and p=0.003, respectively). CONCLUSIONS The representative subset of the Spanish CF-population which has been clinically, demographically and microbiologically characterized will serve as a reference for future CF studies in Spain.
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Repeated Burkholderia cepacia Peritonitis in a Patient Undergoing Continuous Ambulatory Peritoneal Dialysis. W INDIAN MED J 2015; 64:288-90. [PMID: 26426187 DOI: 10.7727/wimj.2014.278] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Accepted: 10/31/2014] [Indexed: 11/18/2022]
Abstract
Burkholderia cepacia (B cepacia) is a rare opportunistic pathogen in continuous ambulatory peritoneal dialysis (CAPD) peritonitis. We describe the first case of repeated B cepacia CAPD peritonitis, occurring in an outpatient environment, treated with antimicrobial medication without peritoneal catheter removal. B cepacia may lead to repeat infection, therefore, we should insist on catheter removal during each peritonitis episode.
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18
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Wang L, Wang M, Zhang J, Wu W, Lu Y, Fan Y. An outbreak of Burkholderia stabilis colonization in a nasal ward. Int J Infect Dis 2015; 33:71-4. [PMID: 25578264 DOI: 10.1016/j.ijid.2014.12.046] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2014] [Revised: 12/05/2014] [Accepted: 12/26/2014] [Indexed: 10/24/2022] Open
Abstract
OBJECTIVE The aim of this study was to describe an outbreak of Burkholderia stabilis colonization among patients in a nasal ward. METHODS Multilocus sequence typing (MLST) was used for the molecular typing of B. stabilis isolates. Microbiological records were reviewed to delineate the colonization outbreak period. One hundred seventy-one cultures of environment and equipment samples from the nasal ward were performed to trace the source of contamination. Infection control measures were taken in order to end the outbreak. RESULTS All B. stabilis isolates were identified as a new MLST type, ST821. A total of 53 patients carried this B. stabilis in the nasal ward between March and September 2013, which was defined as the outbreak period. The source of the colonization was not determined because all environment cultures were negative for Burkholderia cepacia complex. No further B. stabilis carriers have been found in the ward since the implementation of interventions. CONCLUSIONS Attention must be paid to asymptomatic colonization in order to identify outbreaks early.
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Affiliation(s)
- Lijun Wang
- Department of Laboratory Medicine, Beijing Tsinghua Chang Gung Hospital, Medical Center, Tsinghua University, No. 168 Litang Road, Dongxiaokou Town, Changping District, Beijing 102218, China.
| | - Mei Wang
- Department of Laboratory Medicine, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Junyi Zhang
- Department of Otolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China; Department of Otolaryngology, Daqing Oilfield General Hospital, Daqing, Heilongjiang Province, China
| | - Wei Wu
- Department of Laboratory Medicine, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Yuan Lu
- Department of Laboratory Medicine, Xi'an No. 1 Hospital, Xi'an City, Shanxi Province, China
| | - Yanyan Fan
- Department of Laboratory Medicine, Beijing Tsinghua Chang Gung Hospital, Medical Center, Tsinghua University, No. 168 Litang Road, Dongxiaokou Town, Changping District, Beijing 102218, China
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Increase in isolation of Burkholderia contaminans from Spanish patients with cystic fibrosis. Clin Microbiol Infect 2014; 21:150-6. [PMID: 25658563 DOI: 10.1016/j.cmi.2014.07.014] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2014] [Revised: 07/22/2014] [Accepted: 07/31/2014] [Indexed: 11/22/2022]
Abstract
Species of the Burkholderia cepacia complex are associated with opportunistic infection in patients with cystic fibrosis. For years now, B. multivorans and B. cenocepacia have been the most frequently isolated species within the complex in such patients. However, between 2008 and 2012, the overall incidence of these species in Spain (17.7% and 12.5% respectively) was overtaken by that of B. contaminans (36.5%). The population structure of B. contaminans isolates from Spanish patients with cystic fibrosis was analysed using multilocus sequence typing and pulsed-field gel electrophoresis (PFGE). Three major known sequence types (ST102, ST404 and ST482) and a new one (ST771) were identified among 59 isolates. In addition, PFGE detected 17 pulsotypes. Susceptibility to antibiotics was examined using the Etest. Cotrimoxazole and ceftazidime were the most active antibiotics against B. contaminans, inhibiting growth in 88% and 86% of the isolates, respectively. In addition, this species showed less resistance to most of the antibiotics tested than did either B. multivorans or B. cenocepacia isolates recovered from similar Spanish patients.
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Clonal diversity among Burkholderia cepacia complex isolates from cystic fibrosis patients in a reference unit. Enferm Infecc Microbiol Clin 2013; 31:665-8. [DOI: 10.1016/j.eimc.2013.04.025] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2013] [Revised: 04/16/2013] [Accepted: 04/25/2013] [Indexed: 11/20/2022]
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