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Lazzem A, Lekired A, Ouzari HI, Landoulsi A, Chatti A, El May A. Isolation and characterization of a newly chrysene-degrading Achromobacter aegrifaciens. Int Microbiol 2024; 27:857-869. [PMID: 37851202 DOI: 10.1007/s10123-023-00435-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 09/21/2023] [Accepted: 09/28/2023] [Indexed: 10/19/2023]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) are considered substances of potential human health hazards because of their resistance to biodegradation and carcinogenic index. Chrysene is a PAH with a high molecular weight (HMW) that poses challenges for its elimination from the environment. However, bacterial degradation is an effective, environmentally friendly, and cost-effective solution. In our study, we isolated a potential chrysene-degrading bacteria from crude oil-contaminated seawater (Bizerte, Tunisia). Based on 16SrRNA analysis, the isolate S5 was identified as Achromobacter aegrifaciens. Furthermore, the results revealed that A. aegrifaciens S5 produced a biofilm on polystyrene at 20 °C and 30 °C, as well as at the air-liquid (A-L) interface. Moreover, this isolate was able to swim and produce biosurfactants with an emulsification activity (E24%) over 53%. Chrysene biodegradation by isolate S5 was clearly assessed by an increase in the total viable count. Confirmation was obtained via gas chromatography-mass spectrometry (GC-MS) analyses. A. aegrifaciens S5 could use chrysene as its sole carbon and energy source, exhibiting an 86% degradation of chrysene on day 7. In addition, the bacterial counts reached their highest level, over 25 × 1020 CFU/mL, under the conditions of pH 7.0, a temperature of 30 °C, and a rotary speed of 120 rpm. Based on our findings, A. aegrifaciens S5 can be a potential candidate for bioremediation in HMW-PAH-contaminated environments.
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Affiliation(s)
- Assia Lazzem
- Laboratory of Risks Related to Environmental Stresses: Fight and Prevention, Faculty of Sciences of Bizerte, University of Carthage, 7021, Jarzouna, Tunisia.
| | - Abdelmalek Lekired
- Laboratory of Microorganisms and Actives Biomolecules, Faculty of Sciences of Tunis, University Tunis El Manar, 2092, Tunis, Tunisia
| | - Hadda-Imene Ouzari
- Laboratory of Microorganisms and Actives Biomolecules, Faculty of Sciences of Tunis, University Tunis El Manar, 2092, Tunis, Tunisia
| | - Ahmed Landoulsi
- Laboratory of Risks Related to Environmental Stresses: Fight and Prevention, Faculty of Sciences of Bizerte, University of Carthage, 7021, Jarzouna, Tunisia
| | - Abdelwaheb Chatti
- Laboratory of Risks Related to Environmental Stresses: Fight and Prevention, Faculty of Sciences of Bizerte, University of Carthage, 7021, Jarzouna, Tunisia
| | - Alya El May
- Laboratory of Risks Related to Environmental Stresses: Fight and Prevention, Faculty of Sciences of Bizerte, University of Carthage, 7021, Jarzouna, Tunisia
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Zhang S, Liu Y, Wang H, Xu Z, Peng J, Xu Q, Li K, Wang H, Guo Y. Achromobacter seleniivolatilans sp. nov. and Buttiauxella selenatireducens sp. nov., isolated from the rhizosphere of selenium hyperaccumulator Cardamine hupingshanesis. Int J Syst Evol Microbiol 2024; 74. [PMID: 38619980 DOI: 10.1099/ijsem.0.006334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/17/2024] Open
Abstract
Two Gram-stain-negative bacterial strains, R39T and R73T, were isolated from the rhizosphere soil of the selenium hyperaccumulator Cardamine hupingshanesis in China. Strain R39T transformed selenite into elemental and volatile selenium, whereas strain R73T transformed both selenate and selenite into elemental selenium. Phylogenetic and phylogenomic analyses indicated that strain R39T belonged to the genus Achromobacter, while strain R73T belonged to the genus Buttiauxella. Strain R39T (genome size, 6.68 Mb; G+C content, 61.6 mol%) showed the closest relationship to Achromobacter marplatensis LMG 26219T and Achromobacter kerstersii LMG 3441T, with average nucleotide identity (ANI) values of 83.6 and 83.4 %, respectively. Strain R73T (genome size, 5.22 Mb; G+C content, 50.3 mol%) was most closely related to Buttiauxella ferragutiae ATCC 51602T with an ANI value of 86.4 %. Furthermore, strain A111 from the GenBank database was found to cluster with strain R73T within the genus Buttiauxella through phylogenomic analyses. The ANI and digital DNA-DNA hybridization values between strains R73T and A111 were 97.5 and 80.0% respectively, indicating that they belong to the same species. Phenotypic characteristics also differentiated strain R39T and strain R73T from their closely related species. Based on the polyphasic analyses, strain R39T and strain R73T represent novel species of the genera Achromobacter and Buttiauxella, respectively, for which the names Achromobacter seleniivolatilans sp. nov. (type strain R39T=GDMCC 1.3843T=JCM 36009T) and Buttiauxella selenatireducens sp. nov. (type strain R73T=GDMCC 1.3636T=JCM 35850T) are proposed.
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Affiliation(s)
- Sasa Zhang
- College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, PR China
- Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, Beijing, 100193, PR China
| | - Yi Liu
- College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, PR China
- Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, Beijing, 100193, PR China
| | - Hao Wang
- Division of Biology and Biological Engineering, California Institute of Technology, California, 91125, USA
| | - Zhongnan Xu
- College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, PR China
- Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, Beijing, 100193, PR China
| | - Jing Peng
- College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, PR China
- Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, Beijing, 100193, PR China
| | - Qiaolin Xu
- College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, PR China
- Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, Beijing, 100193, PR China
| | - Kui Li
- College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, PR China
- Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, Beijing, 100193, PR China
| | - Haoyang Wang
- College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, PR China
- Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, Beijing, 100193, PR China
| | - Yanbin Guo
- College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, PR China
- Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, Beijing, 100193, PR China
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Qian ZM, Xu XS, Li CT, Song PY, Wang QR. Isolation, identification, and drug resistance of a partially isolated bacterium from the gill of Siniperca chuatsi. Open Life Sci 2023; 18:20220608. [PMID: 37304890 PMCID: PMC10251159 DOI: 10.1515/biol-2022-0608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 03/01/2023] [Accepted: 03/30/2023] [Indexed: 06/13/2023] Open
Abstract
This study was envisaged to identify a strain of bacteria isolated from the gill of mandarin fish. Identification and characterization of the bacterial strain were performed using morphological characteristics, growth temperature, physiological and biochemical tests, antibiotic sensitivity tests, artificial infection tests, and 16S rRNA gene sequencing homology analysis. The results showed that the bacterium was Gram-negative, with flagella at the end and the side. The bacterium exhibited a light brownish-gray colony on the Luria-Bertani culture and white colony on the blood agar plate without hemolytic ring. Normal growth was achieved at 42°C, and growth could be delayed in 7% NaCl broth medium. By homology comparison and analysis, the phylogenetic tree was constructed using MEGA7.0, and the bacterium was preliminarily identified as Achromobacter. The antibiotic sensitivity test showed that the strain was sensitive to piperacillin, carbenicillin, cefoperazone, cefazolin, ofloxacin, gentamicin, kanamycin, amikacin, neomycin, erythromycin, minocycline, doxycycline, polymyxin B, tetracycline, chloramphenicol, and other drugs. However, it was resistant to penicillin, ampicillin, oxacillin, ceftriaxone, cefradine, cefalexin, cefuroxime sodium, ciprofloxacin, norfloxacin, vancomycin, compound sulfamethoxazole, clindamycin, medimycin, and furazolidone.
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Affiliation(s)
- Zheng-Min Qian
- Biological and Agricultural Science Technology Institute, Zunyi Normal College, Zunyi, Guizhou, 563006, China
| | - Xiao-Shu Xu
- Biological and Agricultural Science Technology Institute, Zunyi Normal College, Zunyi, Guizhou, 563006, China
| | - Chun-Tao Li
- Biological and Agricultural Science Technology Institute, Zunyi Normal College, Zunyi, Guizhou, 563006, China
| | - Pei-Yong Song
- Biological and Agricultural Science Technology Institute, Zunyi Normal College, Zunyi, Guizhou, 563006, China
| | - Qing-Rong Wang
- Biological and Agricultural Science Technology Institute, Zunyi Normal College, Zunyi, Guizhou, 563006, China
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Achromobacter spp. prevalence and adaptation in cystic fibrosis lung infection. Microbiol Res 2022; 263:127140. [DOI: 10.1016/j.micres.2022.127140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 07/11/2022] [Accepted: 07/20/2022] [Indexed: 11/30/2022]
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Genomic Insights into Achromobacter mucicolens IA Antibiotic Resistance. Microbiol Spectr 2022; 10:e0191621. [PMID: 35377213 PMCID: PMC9045304 DOI: 10.1128/spectrum.01916-21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Achromobacter denitrificans is an environmental opportunistic pathogen that is infecting a large number of immunocompromised patients. A more recently identified strain from the historical collection of strains of Achromobacter denitrificans is Achromobacter mucicolens. In hosts with a variety of underlying diseases, Achromobacter spp. can induce a wide spectrum of disorders. Because of the bacterium’s intrinsic genetic constitution and resistance gained over time, antibiotics are challenged to handle A. mucicolens. Due to the fact that A. mucicolens is rare and its taxonomy is not completely understood, it is difficult to define clinical symptoms, acquisition risk factors, and thus the best therapeutic course of action. To help comprehend this intrinsic and acquired resistance, we analyzed the entire genome of the A. mucicolens IA strain and utilized bioinformatics methods to estimate the strain's probable drug resistance profile. In our study, we have isolated and cultured a clinically important A. mucicolens strain and subjected it to antimicrobial susceptibility tests against antibiotics in the Vitek 2 testing system. The strain’s genome sequence as well as an investigation of 27 of its phenotypic traits provides important information regarding this pathogen. The genome of this A. mucicolens IA strain possesses a number of antibiotic resistance genes that code for efflux pump systems and other antibiotic-regulating as well as -modifying enzymes. Our research analysis predicted genes involved in drug resistance, including genes for efflux pump systems, antibiotic efflux, antibiotic inactivation, and antibiotic target alteration. In vitro studies validated the genomic evidence for its ability to exhibit resistance against a wide range of antibiotics. Our investigation paves the way for more research on understanding the functioning of the key discovered genes that contribute toward the pathogenicity of A. mucicolens and hence gives new information and treatment options for this emerging pathogen. IMPORTANCEAchromobacter species are well-known opportunistic human pathogens that can be found in water and soil and most commonly in hospital settings. They thrive in immunocompromised individuals, producing sporadic cases of pneumonia, septicemia, peritonitis, urinary tract infections, and other illnesses. Achromobacter strains are inherently resistant to a wide spectrum of antibiotics, making them difficult to treat promptly. The strain under study, A. mucicolens, was notably resistant to various antibiotics, and the infection could be controlled only after several rounds of prescription medications at different doses. This consumed a lot of time and put the already immunosuppressed leukemic patient through a great ordeal. The study aimed to raise awareness about the importance of the Achromobacter bacterium’s lethality, and doctors should evaluate the bacterium’s potential for resistance before prescribing antibiotics. Sanitation and other precautions should also be implemented in hospitals and other public places.
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Sviridov AV, Shushkova TV, Epiktetov DO, Tarlachkov SV, Ermakova IT, Leontievsky AA. Biodegradation of Organophosphorus Pollutants by Soil Bacteria: Biochemical Aspects and Unsolved Problems. APPL BIOCHEM MICRO+ 2021. [DOI: 10.1134/s0003683821070085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Abstract
Cystic fibrosis patients frequently suffer from recurring respiratory infections caused by colonizing pathogenic and commensal bacteria. Although modern therapies can sometimes alleviate respiratory symptoms by ameliorating residual function of the protein responsible for the disorder, management of chronic respiratory infections remains an issue. In cystic fibrosis, dynamic and complex communities of microbial pathogens and commensals can colonize the lung. Cultured isolates from lung sputum reveal high inter- and intraindividual variability in pathogen strains, sequence variants, and phenotypes; disease progression likely depends on the precise combination of infecting lineages. Routine clinical protocols, however, provide a limited overview of the colonizer populations. Therefore, a more comprehensive and precise identification and characterization of infecting lineages could assist in making corresponding decisions on treatment. Here, we describe longitudinal tracking for four cystic fibrosis patients who exhibited extreme clinical phenotypes and, thus, were selected from a pilot cohort of 11 patients with repeated sampling for more than a year. Following metagenomics sequencing of lung sputum, we find that the taxonomic identity of individual colonizer lineages can be easily established. Crucially, even superficially clonal pathogens can be subdivided into multiple sublineages at the sequence level. By tracking individual allelic differences over time, an assembly-free clustering approach allows us to reconstruct multiple lineage-specific genomes with clear structural differences. Our study showcases a culture-independent shotgun metagenomics approach for longitudinal tracking of sublineage pathogen dynamics, opening up the possibility of using such methods to assist in monitoring disease progression through providing high-resolution routine characterization of the cystic fibrosis lung microbiome.
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Isler B, Kidd TJ, Stewart AG, Harris P, Paterson DL. Achromobacter Infections and Treatment Options. Antimicrob Agents Chemother 2020; 64:e01025-20. [PMID: 32816734 PMCID: PMC7577122 DOI: 10.1128/aac.01025-20] [Citation(s) in RCA: 77] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Achromobacter is a genus of nonfermenting Gram-negative bacteria under order Burkholderiales Although primarily isolated from respiratory tract of people with cystic fibrosis, Achromobacter spp. can cause a broad range of infections in hosts with other underlying conditions. Their rare occurrence and ever-changing taxonomy hinder defining their clinical features, risk factors for acquisition and adverse outcomes, and optimal treatment. Achromobacter spp. are intrinsically resistant to several antibiotics (e.g., most cephalosporins, aztreonam, and aminoglycosides), and are increasingly acquiring resistance to carbapenems. Carbapenem resistance is mainly caused by multidrug efflux pumps and metallo-β-lactamases, which are not expected to be overcome by new β-lactamase inhibitors. Among the other new antibiotics, cefiderocol, and eravacycline were used as salvage therapy for a limited number of patients with Achromobacter infections. In this article, we aim to give an overview of the antimicrobial resistance in Achromobacter species, highlighting the possible place of new antibiotics in their treatment.
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Affiliation(s)
- Burcu Isler
- University of Queensland, Faculty of Medicine, UQ Center for Clinical Research, Brisbane, Australia
| | - Timothy J Kidd
- Central Microbiology, Pathology Queensland, Royal Brisbane and Women's Hospital, Brisbane, Australia
- University of Queensland, Faculty of Science, School of Chemistry and Molecular Biosciences, Brisbane, Australia
| | - Adam G Stewart
- University of Queensland, Faculty of Medicine, UQ Center for Clinical Research, Brisbane, Australia
- Infectious Diseases Unit, Royal Brisbane and Women's Hospital, Brisbane, Australia
| | - Patrick Harris
- University of Queensland, Faculty of Medicine, UQ Center for Clinical Research, Brisbane, Australia
- Central Microbiology, Pathology Queensland, Royal Brisbane and Women's Hospital, Brisbane, Australia
| | - David L Paterson
- University of Queensland, Faculty of Medicine, UQ Center for Clinical Research, Brisbane, Australia
- Infectious Diseases Unit, Royal Brisbane and Women's Hospital, Brisbane, Australia
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Achromobacter aestuarii sp. nov., Isolated from an Estuary. Curr Microbiol 2020; 78:411-416. [PMID: 33033853 DOI: 10.1007/s00284-020-02231-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Accepted: 09/29/2020] [Indexed: 10/23/2022]
Abstract
A novel strain KS-M25T was isolated from estuary water in South Korea. Strain KS-M25T was Gram-staining-negative, strictly aerobic, motile rods-shaped bacterium and showed oxidase- and catalase-positive reactions. Growth of strain KS-M25T was observed at 10-25 °C (optimum, 20 °C), at pH 5.5-9.0 (optimum, pH 7.5), and with 0-6.0% (w/v) NaCl (optimum, 1%). Ubiquinone-8 was identified as the sole isoprenoid quinone and the major fatty acids were C16:0, cyclo-C17:0 and sum in feature 3 (comprising C16:1 ω7c and/or C16:1 ω6c). The G+C content values based on genome sequences was 62.3 mol%. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain KS-M25T formed a clear cluster within the genus Achromobacter. Strain KS-M25T was most closely related to Achromobacter anxifer LMG 26857T, Achromobacter dolens LMG 26840T, and Achromobacter xylosoxidans NBRC 15126T with 97.8%, 97.8%, and 97.7% 16S rRNA gene sequence similarities, respectively. Based on phenotypic, chemotaxonomic, and phylogenetic analysis, strain KS-M25T represents a novel species of the genes Achromobacter, for which the name Achromobacter aestuarii sp. nov. is proposed. The type strain is KS-M25T (= KACC 21219T = JCM 33329T).
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Insights into growth kinetics and roles of enzymes of Krebs' cycle and sulfur oxidation during exochemolithoheterotrophic growth of Achromobacter aegrifaciens NCCB 38021 on succinate with thiosulfate as the auxiliary electron donor. Arch Microbiol 2020; 203:561-578. [PMID: 32989476 DOI: 10.1007/s00203-020-02028-1] [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: 05/28/2020] [Revised: 08/18/2020] [Accepted: 09/02/2020] [Indexed: 10/23/2022]
Abstract
Achromobacter aegrifaciens NCCB 38021 was grown heterotrophically on succinate versus exochemolithoheterotrophically on succinate with thiosulfate as auxiliary electron donor. In batch culture, no significant differences in specific molar growth yield or specific growth rate were found for the two growth conditions, but in continuous culture in the succinate-limited chemostat, the maximum specific growth yield coefficient increased by 23.3% with thiosulfate present, consistent with previous studies of endo- and exochemolithoheterotrophs and thermodynamic predictions. Thiosulfate oxidation was coupled to respiration at cytochrome c551, and thiosulfate-dependent ATP biosynthesis occurred. Specific activities of cytochrome c-linked thiosulfate dehydrogenase (E.C. 1.8.2.2) and two other enzymes of sulfur metabolism were significantly higher in exochemolithoheterotrophically grown cell extracts, while those of succinyl-transferring 2-oxoglutarate dehydrogenase (E.C. 1.2.4.2), fumarate hydratase (E.C. 4.2.1.2) and malate dehydrogenase (NAD+, E.C. 1.1.1.37) were significantly lower-presumably owing to less need to generate reducing equivalents during Krebs' cycle, since they could be produced from thiosulfate oxidation.
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Price EP, Soler Arango V, Kidd TJ, Fraser TA, Nguyen TK, Bell SC, Sarovich DS. Duplex real-time PCR assay for the simultaneous detection of Achromobacter xylosoxidans and Achromobacter spp. Microb Genom 2020; 6:mgen000406. [PMID: 32667877 PMCID: PMC7478622 DOI: 10.1099/mgen.0.000406] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Accepted: 06/26/2020] [Indexed: 01/10/2023] Open
Abstract
Several members of the Gram-negative environmental bacterial genus Achromobacter are associated with serious infections, with Achromobacter xylosoxidans being the most common. Despite their pathogenic potential, little is understood about these intrinsically drug-resistant bacteria and their role in disease, leading to suboptimal diagnosis and management. Here, we performed comparative genomics for 158 Achromobacter spp. genomes to robustly identify species boundaries, reassign several incorrectly speciated taxa and identify genetic sequences specific for the genus Achromobacter and for A. xylosoxidans. Next, we developed a Black Hole Quencher probe-based duplex real-time PCR assay, Ac-Ax, for the rapid and simultaneous detection of Achromobacter spp. and A. xylosoxidans from both purified colonies and polymicrobial clinical specimens. Ac-Ax was tested on 119 isolates identified as Achromobacter spp. using phenotypic or genotypic methods. In comparison to these routine diagnostic methods, the duplex assay showed superior identification of Achromobacter spp. and A. xylosoxidans, with five Achromobacter isolates failing to amplify with Ac-Ax confirmed to be different genera according to 16S rRNA gene sequencing. Ac-Ax quantified both Achromobacter spp. and A. xylosoxidans down to ~110 genome equivalents and detected down to ~12 and ~1 genome equivalent(s), respectively. Extensive in silico analysis, and laboratory testing of 34 non-Achromobacter isolates and 38 adult cystic fibrosis sputa, confirmed duplex assay specificity and sensitivity. We demonstrate that the Ac-Ax duplex assay provides a robust, sensitive and cost-effective method for the simultaneous detection of all Achromobacter spp. and A. xylosoxidans and will facilitate the rapid and accurate diagnosis of this important group of pathogens.
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Affiliation(s)
- Erin P. Price
- GeneCology Research Centre, University of the Sunshine Coast, Sippy Downs, Queensland, Australia
- Sunshine Coast Health Institute, Birtinya, Queensland, Australia
| | - Valentina Soler Arango
- GeneCology Research Centre, University of the Sunshine Coast, Sippy Downs, Queensland, Australia
- Sunshine Coast Health Institute, Birtinya, Queensland, Australia
| | - Timothy J. Kidd
- School of Chemistry and Molecular Biosciences, Faculty of Science, The University of Queensland, St Lucia, Queensland, Australia
- QIMR Berghofer Medical Research Institute, Herston, Queensland, Australia
- Faculty of Medicine, The University of Queensland, Herston, Queensland, Australia
| | - Tamieka A. Fraser
- GeneCology Research Centre, University of the Sunshine Coast, Sippy Downs, Queensland, Australia
- Sunshine Coast Health Institute, Birtinya, Queensland, Australia
| | - Thuy-Khanh Nguyen
- QIMR Berghofer Medical Research Institute, Herston, Queensland, Australia
| | - Scott C. Bell
- QIMR Berghofer Medical Research Institute, Herston, Queensland, Australia
- Faculty of Medicine, The University of Queensland, Herston, Queensland, Australia
- Adult Cystic Fibrosis Centre, The Prince Charles Hospital, Chermside, Queensland, Australia
| | - Derek S. Sarovich
- GeneCology Research Centre, University of the Sunshine Coast, Sippy Downs, Queensland, Australia
- Sunshine Coast Health Institute, Birtinya, Queensland, Australia
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Garrigos T, Neuwirth C, Chapuis A, Bador J, Amoureux L. Development of a database for the rapid and accurate routine identification of Achromobacter species by matrix-assisted laser desorption/ionization-time-of-flight mass spectrometry (MALDI-TOF MS). Clin Microbiol Infect 2020; 27:126.e1-126.e5. [PMID: 32283265 DOI: 10.1016/j.cmi.2020.03.031] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Revised: 02/17/2020] [Accepted: 03/26/2020] [Indexed: 10/24/2022]
Abstract
OBJECTIVES Achromobacter spp. are emerging pathogens in respiratory samples from cystic fibrosis patients. The current reference methods (nrdA-sequencing or multilocus sequence typing) can identify 18 species which are often misidentified by conventional techniques as A. xylosoxidans. A few studies have suggested that matrix-assisted laser desorption/ionization-time-of-flight mass spectrometry (MALDI-TOF/MS) provides accurate identification of the genus but not of species. The aims of this study were (a) to generate a database for MALDI-TOF/MS Bruker including the 18 species, (b) to evaluate the suitability of the database for routine laboratory identification, and (c) to compare its performance with that of the currently available Bruker default database. METHODS A total of 205 isolates belonging to the 18 species identified by nrdA sequencing were used to build a local database. Main spectra profiles (MSPs) were created according to Bruker's recommendations for each isolate with the Biotyper software. Performance of the default Bruker database and ours for routine use were compared by testing 167 strains (including 38 isolates used from MSP creation) belonging to the 18 species identified by nrdA sequencing directly from colonies cultivated on various media. RESULTS Our new database accurately identified 99.4% (166/167) of the isolates from the 18 species (score ≥2.0) versus only 50.9% (85/167) with the Bruker database. In the Bruker database 17.3% of the isolates (29/167) were incorrectly identified as another species despite a score of ≥2.0. CONCLUSIONS The use of MALDI-TOF/MS in combination with a database developed with samples from 18 Achromobacter species provides rapid and accurate identification. This tool could be used to help future clinical studies.
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Affiliation(s)
- T Garrigos
- Department of Bacteriology, University Hospital of Dijon, BP 37013, 21070, Dijon Cedex, France
| | - C Neuwirth
- Department of Bacteriology, University Hospital of Dijon, BP 37013, 21070, Dijon Cedex, France; UMR/CNRS 6249 Chrono-environnement, University of Bourgogne- Franche-Comté, Besançon, France
| | - A Chapuis
- Department of Bacteriology, University Hospital of Dijon, BP 37013, 21070, Dijon Cedex, France
| | - J Bador
- Department of Bacteriology, University Hospital of Dijon, BP 37013, 21070, Dijon Cedex, France; UMR/CNRS 6249 Chrono-environnement, University of Bourgogne- Franche-Comté, Besançon, France
| | - L Amoureux
- Department of Bacteriology, University Hospital of Dijon, BP 37013, 21070, Dijon Cedex, France; UMR/CNRS 6249 Chrono-environnement, University of Bourgogne- Franche-Comté, Besançon, France.
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Dumolin C, Peeters C, Ehsani E, Tahon G, De Canck E, Cnockaert M, Boon N, Vandamme P. Achromobacter veterisilvae sp. nov., from a mixed hydrogen-oxidizing bacteria enrichment reactor for microbial protein production. Int J Syst Evol Microbiol 2020; 70:530-536. [PMID: 31613739 DOI: 10.1099/ijsem.0.003786] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Strain LMG 30378T was isolated from a hydrogen-oxidizing bacteria enrichment reactor inoculated with forest soil. Phylogenetic analysis based on the 16S rRNA gene sequence indicated that this strain belonged to the genus Achromobacter. Multilocus sequence analysis combined with sequence analysis of a 765 bp nrd A gene fragment both showed Achromobacter agilis LMG 3411T and Achromobacter denitrificans LMG 1231T to be the closest-related neighbours to strain LMG 30378T. Genome sequence analysis revealed a draft genome of 6.81 Mb with a G+C content of 67.2 mol%. In silico DNA-DNA hybridization with A. denitrificans LMG 1231T and A. agilis LMG 3411T showed 42.7 and 42.5% similarity, respectively, confirming that strain LMG 30378T represented a novel Achromobacter species. Phenotypic and metabolic characterization revealed acid phosphatase activity and the absence of phosphoamidase activity as distinctive features. The draft genome composes all necessary metabolic components to fix carbon dioxide and to oxidize molecular hydrogen, suggesting that strain LMG 30378T is a key organism in the enrichment reactor. Together, these data demonstrate that strain LMG 30378T represents a novel species of the genus Achromobacter, for which the name Achromobacter veterisilvae sp. nov. is proposed. The type strain is LMG 30378T (=CCUG 71558T).
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Affiliation(s)
- Charles Dumolin
- Laboratory of Microbiology, Department of Biochemistry and Microbiology, Ghent University, K. L. Ledeganckstraat 35, B-9000 Ghent, Belgium
| | - Charlotte Peeters
- Laboratory of Microbiology, Department of Biochemistry and Microbiology, Ghent University, K. L. Ledeganckstraat 35, B-9000 Ghent, Belgium
| | - Elham Ehsani
- Center for Microbial Ecology and Technology (CMET), Department of Biochemical and Microbial Technology, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - Guillaume Tahon
- BCCM/LMG Bacteria Collection, Laboratory of Microbiology, Department of Biochemistry and Microbiology, Ghent University, K. L. Ledeganckstraat 35, B-9000 Ghent, Belgium.,Laboratory of Microbiology, Department of Biochemistry and Microbiology, Ghent University, K. L. Ledeganckstraat 35, B-9000 Ghent, Belgium
| | - Evelien De Canck
- Laboratory of Microbiology, Department of Biochemistry and Microbiology, Ghent University, K. L. Ledeganckstraat 35, B-9000 Ghent, Belgium
| | - Margo Cnockaert
- Laboratory of Microbiology, Department of Biochemistry and Microbiology, Ghent University, K. L. Ledeganckstraat 35, B-9000 Ghent, Belgium
| | - Nico Boon
- Center for Microbial Ecology and Technology (CMET), Department of Biochemical and Microbial Technology, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - Peter Vandamme
- BCCM/LMG Bacteria Collection, Laboratory of Microbiology, Department of Biochemistry and Microbiology, Ghent University, K. L. Ledeganckstraat 35, B-9000 Ghent, Belgium.,Laboratory of Microbiology, Department of Biochemistry and Microbiology, Ghent University, K. L. Ledeganckstraat 35, B-9000 Ghent, Belgium
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First Documented Case of Percutaneous Endoscopic Gastrostomy (PEG) Tube-Associated Bacterial Peritonitis due to Achromobacter Species with Literature Review. Case Rep Gastrointest Med 2020; 2020:4397930. [PMID: 32047677 PMCID: PMC7007964 DOI: 10.1155/2020/4397930] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Revised: 10/24/2019] [Accepted: 11/11/2019] [Indexed: 01/25/2023] Open
Abstract
Introduction. Achromobacter species (spp.) peritonitis has seldom been identified in medical literature. Scarce cases of Achromobacter peritonitis described previously have been correlated with peritoneal dialysis and more sparingly with spontaneous bacterial peritonitis. Achromobacter exhibits intrinsic and acquired resistance, especially in chronic infections, to most antibiotics. This article conducts a literature review of all previously reported Achromobacter spp. peritonitis and describes the first reported case of Achromobacter peritonitis as a complication of percutaneous endoscopic gastrostomy (PEG) tube placement. Discussion. Achromobacter peritonitis as a complication of PEG-tube placement has not been previously reported. In our patients' case, the recently placed PEG-tube with ascitic fluid leakage was identified as the most plausible infection source. Although a rare bacterial peritonitis pathogen, Achromobacter may be associated with wide antimicrobial resistance and unfavorable outcomes. Conclusion. No current guidelines provide significant guidance on treatment of PEG-tube peritonitis regardless of microbial etiology. Infectious Disease Society of America identifies various broad-spectrum antibiotics targeting nosocomial intra-abdominal coverage; some of these antimicrobial selections (such as cefepime and metronidazole combination) may yet be inadequate for widely resistant Achromobacter spp. Recognizably, the common antibiotics utilized for spontaneous bacterial peritonitis, i.e., third generation cephalosporins and fluoroquinolones, to which Achromobacter is resistant and variably susceptible, respectively, would be extensively insufficient. Piperacillin/tazobactam (P/T) and carbapenem were identified to provide the most reliable coverage in vitro; clinically, 5 out of the 8 patients who received either P/T or a carbapenem, or both, eventually experienced clinical improvement.
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15
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Ying JJ, Zhang SL, Huang CY, Xu L, Zhao Z, Wu M, Sun C. Algicoccus marinus gen. nov. sp. nov., a marine bacterium isolated from the surface of brown seaweed Laminaria japonica. Arch Microbiol 2019; 201:943-950. [PMID: 31025054 DOI: 10.1007/s00203-019-01664-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 03/27/2019] [Accepted: 04/15/2019] [Indexed: 11/26/2022]
Abstract
A Gram-staining-negative, strictly aerobic, non-motile, ovoid- to rod-shaped bacterium, designated as HZ20T, was isolated from the surface of a brown seaweed (Laminaria japonica) sample collected from the East China Sea. Colonies are 1.0-2.0 mm in diameter, smooth, circular, convex and yellow after grown on MA at 28 °C for 72 h. The strain was found to grow at 4-50 °C (optimum, 37 °C), pH 5.0-9.5 (optimum, pH 7.0-7.5) and with 0-10% (w/v) NaCl (optimum, 1.0-1.5%). Chemotaxonomic analysis showed ubiquinone-8 as the only quinone, C17:0 cyclo, C16:0, summed feature 8 (C18:1ω7c and/or C18:1ω6c) and summed feature 2 (C12:0 aldehyde/unknown 10.9525/C16:1 iso I/C14:0 3OH) as the major fatty acids (> 5%), and diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylglycerol, one unidentified amino phospholipid, two unidentified phospholipids, five unidentified glycolipid and two unidentified lipids as the polar lipids. The DNA G + C content was 55.5 mol %. 16S rRNA gene sequences of the isolate showed highest similarities to Bordetella flabilis AU10664T (97.1%), Parapusillimonas granuli Ch07T (97.1%), Paracandidimonas soli IMT-305T (97.1%), Kerstersia gyiorum LMG5906T (97.0%) and Bordetella sputigena LMG 28641T (97.0%). The phylogenetic trees using 16S rRNA gene and genome sequences both showed that the strain HZ20T formed a deep branch separated from other related genera, indicating that it represents a novel species of a novel genus. The calculated average nucleotide identity (ANI) and percent of conserved proteins (POCP) values using genome sequences of strain HZ20T and related strains also support this conclusion. Based on the phenotypic properties and phylogenetic distinctiveness, we propose strain HZ20T (= MCCC 1K03465T = KCTC 62330T) to represent a novel species of a novel genus with the name Algicoccus marinus gen. nov. sp. nov.
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Affiliation(s)
- Jun-Jie Ying
- Lab of Marine Functional Molecules, 928th Second Avenue, College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, 310018, People's Republic of China
| | - Shun-Li Zhang
- Lab of Marine Functional Molecules, 928th Second Avenue, College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, 310018, People's Republic of China
| | - Chao-Yu Huang
- Lab of Marine Functional Molecules, 928th Second Avenue, College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, 310018, People's Republic of China
| | - Lin Xu
- Lab of Marine Functional Molecules, 928th Second Avenue, College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, 310018, People's Republic of China
| | - Zhe Zhao
- College of Life Sciences, Zhejiang University, Hangzhou, 310058, People's Republic of China
| | - Min Wu
- College of Life Sciences, Zhejiang University, Hangzhou, 310058, People's Republic of China
- Ocean College, Zhejiang University, Zhoushan, 316000, People's Republic of China
| | - Cong Sun
- Lab of Marine Functional Molecules, 928th Second Avenue, College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, 310018, People's Republic of China.
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16
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Role of AxyZ Transcriptional Regulator in Overproduction of AxyXY-OprZ Multidrug Efflux System in Achromobacter Species Mutants Selected by Tobramycin. Antimicrob Agents Chemother 2017; 61:AAC.00290-17. [PMID: 28584156 DOI: 10.1128/aac.00290-17] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Accepted: 03/31/2017] [Indexed: 11/20/2022] Open
Abstract
AxyXY-OprZ is an RND-type efflux system that confers innate aminoglycoside resistance to Achromobacter spp. We investigated here a putative TetR family transcriptional regulator encoded by the axyZ gene located upstream of axyXY-oprZ An in-frame axyZ gene deletion assay led to increased MICs of antibiotic substrates of the efflux system, including aminoglycosides, cefepime, fluoroquinolones, tetracyclines, and erythromycin, indicating that the product of axyZ negatively regulates expression of axyXY-oprZ Moreover, we identified an amino acid substitution at position 29 of AxyZ (V29G) in a clinical Achromobacter strain that occurred during the course of chronic respiratory tract colonization in a cystic fibrosis (CF) patient. This substitution, also detected in three other strains exposed in vitro to tobramycin, led to an increase in the axyY transcription level (5- to 17-fold) together with an increase in antibiotic resistance level. This overproduction of AxyXY-OprZ is the first description of antibiotic resistance acquisition due to modification of a chromosomally encoded mechanism in Achromobacter and might have an impact on the management of infected CF patients. Indeed, tobramycin is widely used for aerosol therapy within this population, and we have demonstrated that it easily selects mutants with increased MICs of not only aminoglycosides but also fluoroquinolones, cefepime, and tetracyclines.
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17
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Singh P, Kim YJ, Singh H, Farh MEA, Yang DC. Achromobacter panacis sp. nov., isolated from rhizosphere of Panax ginseng. J Microbiol 2017; 55:428-434. [PMID: 28551873 DOI: 10.1007/s12275-017-6612-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Revised: 01/26/2017] [Accepted: 01/27/2017] [Indexed: 11/28/2022]
Abstract
A novel strain DCY105T was isolated from soil collected from the rhizosphere of ginseng (Panax ginseng), in Gochang, Republic of Korea. Strain DCY105T is Gram-reaction-negative, white, non-motile, non-flagellate, rod-shaped and aerobic. The bacteria grow optimally at 30°C, pH 6.5-7.0 and in the absence of NaCl. Phylogenetically, strain DCY105T is most closely related to Achromobacter marplatensis LMG 26219T (96.81%). The DNA G+C content of strain DCY105T was 64.4 mol%. Ubiquinone 8 was the major respiratory quinone, and phosphatidylethanolamine, phosphatidylglycerol, and diphosphatidylglycerol were amongst the major polar lipids. C16:00, C8:03OH and iso-C17:03OH were identified as the major fatty acids present in DCY105T. The results of physiological and biochemical tests allowed strain DCY105T to be differentiated phenotypically from other recognized species belonging to the genus Achromobacter. Therefore, it is suggested that the newly isolated organism represents a novel species, for which the name Achromobacter panacis sp. nov. is proposed with the type strain designated as DCY105T (=CCTCCAB 2015193T =KCTC 42751T).
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Affiliation(s)
- Priyanka Singh
- Department of Oriental Medicine Biotechnology, Ginseng Bank, College of Life Science, Kyung Hee University, Yongin, 17104, Republic of Korea. .,Graduate School of Biotechnology, College of Life Science, Kyung Hee University, Yongin, 17104, Republic of Korea.
| | - Yeon Ju Kim
- Department of Oriental Medicine Biotechnology, Ginseng Bank, College of Life Science, Kyung Hee University, Yongin, 17104, Republic of Korea.
| | - Hina Singh
- Department of Oriental Medicine Biotechnology, Ginseng Bank, College of Life Science, Kyung Hee University, Yongin, 17104, Republic of Korea
| | - Mohamed El-Agamy Farh
- Graduate School of Biotechnology, College of Life Science, Kyung Hee University, Yongin, 17104, Republic of Korea
| | - Deok-Chun Yang
- Department of Oriental Medicine Biotechnology, Ginseng Bank, College of Life Science, Kyung Hee University, Yongin, 17104, Republic of Korea. .,Graduate School of Biotechnology, College of Life Science, Kyung Hee University, Yongin, 17104, Republic of Korea.
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18
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Jeukens J, Freschi L, Vincent AT, Emond-Rheault JG, Kukavica-Ibrulj I, Charette SJ, Levesque RC. A Pan-Genomic Approach to Understand the Basis of Host Adaptation in Achromobacter. Genome Biol Evol 2017; 9:1030-1046. [PMID: 28383665 PMCID: PMC5405338 DOI: 10.1093/gbe/evx061] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/04/2017] [Indexed: 12/13/2022] Open
Abstract
Over the past decade, there has been a rising interest in Achromobacter sp., an emerging opportunistic pathogen responsible for nosocomial and cystic fibrosis lung infections. Species of this genus are ubiquitous in the environment, can outcompete resident microbiota, and are resistant to commonly used disinfectants as well as antibiotics. Nevertheless, the Achromobacter genus suffers from difficulties in diagnosis, unresolved taxonomy and limited understanding of how it adapts to the cystic fibrosis lung, not to mention other host environments. The goals of this first genus-wide comparative genomics study were to clarify the taxonomy of this genus and identify genomic features associated with pathogenicity and host adaptation. This was done with a widely applicable approach based on pan-genome analysis. First, using all publicly available genomes, a combination of phylogenetic analysis based on 1,780 conserved genes with average nucleotide identity and accessory genome composition allowed the identification of a largely clinical lineage composed of Achromobacter xylosoxidans, Achromobacter insuavis, Achromobacter dolens, and Achromobacter ruhlandii. Within this lineage, we identified 35 positively selected genes involved in metabolism, regulation and efflux-mediated antibiotic resistance. Second, resistome analysis showed that this clinical lineage carried additional antibiotic resistance genes compared with other isolates. Finally, we identified putative mobile elements that contribute 53% of the genus's resistome and support horizontal gene transfer between Achromobacter and other ecologically similar genera. This study provides strong phylogenetic and pan-genomic bases to motivate further research on Achromobacter, and contributes to the understanding of opportunistic pathogen evolution.
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Affiliation(s)
- Julie Jeukens
- Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Quebec City, Quebec, Canada
| | - Luca Freschi
- Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Quebec City, Quebec, Canada
| | - Antony T Vincent
- Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Quebec City, Quebec, Canada.,Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec (CRIUCPQ), Quebec City, Quebec, Canada.,Département de Biochimie, de Microbiologie et de Bio-informatique, Université Laval, Quebec City, Quebec, Canada
| | | | - Irena Kukavica-Ibrulj
- Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Quebec City, Quebec, Canada
| | - Steve J Charette
- Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Quebec City, Quebec, Canada.,Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec (CRIUCPQ), Quebec City, Quebec, Canada.,Département de Biochimie, de Microbiologie et de Bio-informatique, Université Laval, Quebec City, Quebec, Canada
| | - Roger C Levesque
- Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Quebec City, Quebec, Canada
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19
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Achromobacter aloeverae sp. nov., isolated from the root of Aloe vera (L.) Burm.f. Int J Syst Evol Microbiol 2017; 67:37-41. [DOI: 10.1099/ijsem.0.001566] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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20
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Munson E, Carroll KC. What's in a Name? New Bacterial Species and Changes to Taxonomic Status from 2012 through 2015. J Clin Microbiol 2017; 55:24-42. [PMID: 27795334 PMCID: PMC5228236 DOI: 10.1128/jcm.01379-16] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Technological advancements in fields such as molecular genetics and the human microbiome have resulted in an unprecedented recognition of new bacterial genus/species designations by the International Journal of Systematic and Evolutionary Microbiology Knowledge of designations involving clinically significant bacterial species would benefit clinical microbiologists in the context of emerging pathogens, performance of accurate organism identification, and antimicrobial susceptibility testing. In anticipation of subsequent taxonomic changes being compiled by the Journal of Clinical Microbiology on a biannual basis, this compendium summarizes novel species and taxonomic revisions specific to bacteria derived from human clinical specimens from the calendar years 2012 through 2015.
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Affiliation(s)
- Erik Munson
- College of Health Sciences, Marquette University, Milwaukee, Wisconsin, USA
| | - Karen C Carroll
- Division of Medical Microbiology, Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
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21
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Belykh MP, Petrov SV, Chikin AJ, Belkova NL. Genetic diversity of bacteria adapted to cyanide-bearing compounds in the technogenic ecosystems as detected by 16S rDNA sequences. CONTEMP PROBL ECOL+ 2016. [DOI: 10.1134/s1995425516050012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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22
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Complete Genome Sequences of Bordetella flabilis, Bordetella bronchialis, and "Bordetella pseudohinzii". GENOME ANNOUNCEMENTS 2016; 4:4/5/e01132-16. [PMID: 27738041 PMCID: PMC5064114 DOI: 10.1128/genomea.01132-16] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
We report here the complete genome sequences of Bordetella flabilis and Bordetella bronchialis recovered from cultures of individuals with cystic fibrosis (CF), and “Bordetella pseudohinzii” recovered from a CF mouse model.
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23
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Vandamme PA, Peeters C, Inganäs E, Cnockaert M, Houf K, Spilker T, Moore ERB, LiPuma JJ. Taxonomic dissection of Achromobacter denitrificans Coenye et al. 2003 and proposal of Achromobacter agilis sp. nov., nom. rev., Achromobacter pestifer sp. nov., nom. rev., Achromobacter kerstersii sp. nov. and Achromobacter deleyi sp. nov. Int J Syst Evol Microbiol 2016; 66:3708-3717. [DOI: 10.1099/ijsem.0.001254] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Affiliation(s)
- Peter A. Vandamme
- Laboratorium voor Microbiologie, Vakgroep Biochemie en microbiologie, Faculteit Wetenschappen, Universiteit Gent, Gent, Belgium
| | - Charlotte Peeters
- Laboratorium voor Microbiologie, Vakgroep Biochemie en microbiologie, Faculteit Wetenschappen, Universiteit Gent, Gent, Belgium
| | - Elisabeth Inganäs
- Department of Clinical Microbiology, Sahlgrenska Academy, Culture Collection niversity of Gothenburg, University of Gothenburg, Gothenburg, 41346, Sweden
| | - Margo Cnockaert
- Laboratorium voor Microbiologie, Vakgroep Biochemie en microbiologie, Faculteit Wetenschappen, Universiteit Gent, Gent, Belgium
| | - Kurt Houf
- Vakgroep Veterinaire Volksgezondheid en Voedselveiligheid, Faculteit Diergeneeskunde, Universiteit Gent, Gent, Belgium
| | - Theodore Spilker
- Department of Pediatrics and Communicable Disease, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Edward R. B. Moore
- Department of Clinical Microbiology, Sahlgrenska Academy, Culture Collection niversity of Gothenburg, University of Gothenburg, Gothenburg, 41346, Sweden
| | - John J. LiPuma
- Department of Pediatrics and Communicable Disease, University of Michigan Medical School, Ann Arbor, MI 48109, USA
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24
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Firmida MC, Pereira RHV, Silva EASR, Marques EA, Lopes AJ. Clinical impact of Achromobacter xylosoxidans colonization/infection in patients with cystic fibrosis. Braz J Med Biol Res 2016; 49:e5097. [PMID: 26909788 PMCID: PMC4792508 DOI: 10.1590/1414-431x20155097] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Accepted: 12/17/2015] [Indexed: 12/20/2022] Open
Abstract
The rate of diagnosis of colonization/infection of the airways with
Achromobacter xylosoxidans has increased in cystic fibrosis
patients, but its clinical significance is still controversial. This retrospective,
case-control study aimed to evaluate the clinical impact of A.
xylosoxidans colonization/infection in cystic fibrosis patients.
Individuals who were chronically colonized/infected (n=10), intermittently
colonized/infected (n=15), and never colonized/infected with A.
xylosoxidans (n=18) were retrospectively evaluated during two
periods that were 2 years apart. Demographic characteristics, clinical data, lung
function, and chronic bacterial co-colonization data were evaluated. Of the total
study population, 87% were pediatric patients and 65.1% were female. Individuals
chronically colonized/infected with A. xylosoxidans had decreased
forced expiratory volume in 1 s (51.7% in the chronic colonization/infection group
vs 82.7% in the intermittent colonization/infection group
vs 76% in the never colonized/infected group). Compared with the
other two groups, the rate of co-colonization with methicillin-resistant
Staphylococcus aureus was higher in individuals chronically
colonized/infected with A. xylosoxidans (P=0.002).
Changes in lung function over 2 years in the three groups were not significant,
although a trend toward a greater decrease in lung function was observed in the
chronically colonized/infected group. Compared with the other two groups, there was a
greater number of annual hospitalizations in patients chronically colonized/infected
with A. xylosoxidans (P=0.033). In cystic fibrosis patients, there
was an increased frequency of A. xylosoxidans colonization/infection
in children, and lung function was reduced in patients who were chronically
colonized/infected with A. xylosoxidans. Additionally, there were no
differences in clinical outcomes during the 2-year period, except for an increased
number of hospitalizations in patients with A. xylosoxidans.
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Affiliation(s)
- M C Firmida
- Programa de Pós-Graduação em Ciências Médicas, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
| | - R H V Pereira
- Departamento de Microbiologia, Imunologia e Parasitologia, Faculdade de Ciências Médicas, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
| | - E A S R Silva
- Laboratório de Bacteriologia, Hospital Universitário Pedro Ernesto, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
| | - E A Marques
- Programa de Pós-Graduação em Ciências Médicas, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
| | - A J Lopes
- Programa de Pós-Graduação em Ciências Médicas, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
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25
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Amoureux L, Bador J, Bounoua Zouak F, Chapuis A, de Curraize C, Neuwirth C. Distribution of the species of Achromobacter in a French Cystic Fibrosis Centre and multilocus sequence typing analysis reveal the predominance of A. xylosoxidans and clonal relationships between some clinical and environmental isolates. J Cyst Fibros 2016; 15:486-94. [PMID: 26778615 DOI: 10.1016/j.jcf.2015.12.009] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Revised: 12/01/2015] [Accepted: 12/14/2015] [Indexed: 10/22/2022]
Abstract
BACKGROUND Achromobacter spp. are emerging pathogens in Cystic Fibrosis (CF) patients. Recent studies proposed Multilocus Sequence Typing (MLST) scheme and a species-level identification method by nrdA sequencing for this genus. Epidemiological data are needed to assess the species and/or the sequence types (STs) involved and their potential role in CF patients lung function degradation. The aims of this study were i) to describe the distribution of the different species of Achromobacter in our CF centre ii) to detect potential STs more involved in chronic colonisations iii) to detect a potential local or worldwide predominance of some STs among clinical and environmental isolates. METHODS All the isolates (477) collected in our CF centre from 2007 to 2014 among the 177 patients attending the centre were identified using nrdA sequencing. MLST analysis was performed for 37 clinical and 14 environmental isolates. RESULTS A total of 47 out of 177 patients presented positive culture(s) with Achromobacter spp., representing 12.7% of the patients of the centre each year. Eleven species were detected, A. xylosoxidans being the most prevalent species (27 patients). Only A. xylosoxidans (>80%) and A. insuavis were involved in chronic colonisation (6.7%). MLST analysis revealed a wide diversity among the isolates (36 STs for 51 isolates). Nevertheless, one third of the isolates belonged to STs previously detected in clinical isolates from other countries. CONCLUSIONS This study is a first approach in understanding the global epidemiology of Achromobacter species in CF. These results confirm the high prevalence of the species A. xylosoxidans among CF patients, reveal the worldwide distribution of some STs and point out the potential role of environmental sources of contamination. More studies are needed to search for relationships between species and/or ST and pathogenicity.
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Affiliation(s)
- Lucie Amoureux
- Department of Bacteriology, University Hospital of Dijon, BP 37013, 21070 DIJON CEDEX, France.
| | - Julien Bador
- Department of Bacteriology, University Hospital of Dijon, BP 37013, 21070 DIJON CEDEX, France
| | - Fatma Bounoua Zouak
- Department of Bacteriology, University Hospital of Dijon, BP 37013, 21070 DIJON CEDEX, France
| | - Angélique Chapuis
- Department of Bacteriology, University Hospital of Dijon, BP 37013, 21070 DIJON CEDEX, France
| | - Claire de Curraize
- Department of Bacteriology, University Hospital of Dijon, BP 37013, 21070 DIJON CEDEX, France
| | - Catherine Neuwirth
- Department of Bacteriology, University Hospital of Dijon, BP 37013, 21070 DIJON CEDEX, France
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26
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Vandamme PA, Peeters C, Cnockaert M, Gomila M, Moore ERB, Spilker T, LiPuma JJ. Reclassification of Achromobacter spiritinus Vandamme et al. 2013 as a later heterotypic synonym of Achromobacter marplatensis Gomila et al. 2011. Int J Syst Evol Microbiol 2016; 66:1641-1644. [PMID: 26738485 DOI: 10.1099/ijsem.0.000872] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A repeat multi-locus sequence analysis (MLSA) of concatenated nusA, eno, rpoB, gltB, lepA, nuoL and nrdA sequences of strains classified as Achromobacter marplatensis was performed. The results revealed that earlier reported sequence data of the proposed type strain were erroneous, and that the corrected concatenated sequence divergence between the A. marplatensis LMG 26219T (=CCUG 56371T) sequence type and that of strains of Achromobacter spiritinus was well below the 2.1% threshold value that delineates species of the genus Achromobacter. These results therefore demonstrated that strains which were classified as A. spiritinus should be reclassified as A. marplatensis and that the name Achromobacter spiritinus should no longer be used. An emendation of the description of Achromobacter marplatensis is warranted.
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Affiliation(s)
- Peter A Vandamme
- Laboratorium voor Microbiologie, Vakgroep Biochemie en microbiologie, Faculteit Wetenschappen, Universiteit Gent, Gent, Belgium
| | - Charlotte Peeters
- Laboratorium voor Microbiologie, Vakgroep Biochemie en microbiologie, Faculteit Wetenschappen, Universiteit Gent, Gent, Belgium
| | - Margo Cnockaert
- Laboratorium voor Microbiologie, Vakgroep Biochemie en microbiologie, Faculteit Wetenschappen, Universiteit Gent, Gent, Belgium
| | - Margarita Gomila
- Microbiology, Department of Biology, University of the Balearic Islands, Palma de Mallorca, Islas Baleares, Spain
| | - Edward R B Moore
- Culture Collection University of Gothenburg (CCUG), Department of Infectious Diseases, Sahlgrenska Academy of the University of Gothenburg, Gothenburg, Sweden
| | - Theodore Spilker
- Department of Pediatrics and Communicable Disease, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - John J LiPuma
- Department of Pediatrics and Communicable Disease, University of Michigan Medical School, Ann Arbor, MI 48109, USA
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Bador J, Neuwirth C, Liszczynski P, Mézier MC, Chrétiennot M, Grenot E, Chapuis A, de Curraize C, Amoureux L. Distribution of innate efflux-mediated aminoglycoside resistance among different Achromobacter species. New Microbes New Infect 2015; 10:1-5. [PMID: 26904200 PMCID: PMC4726742 DOI: 10.1016/j.nmni.2015.11.013] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Revised: 11/27/2015] [Accepted: 11/27/2015] [Indexed: 11/21/2022] Open
Abstract
Achromobacter spp. are emerging respiratory pathogens in cystic fibrosis patients. Since 2013 the genus Achromobacter includes 15 species for which innate antibiotic resistance is unknown. Previously the AxyXY-OprZ efflux system has been described to confer aminoglycoside (AG) resistance in A. xylosoxidans. Nevertheless, some Achromobacter spp. strains are susceptible to AG. This study including 49 Achromobacter isolates reveals that AG resistance is correlated with different Achromobacter spp. It is noteworthy that the axyXY-oprZ operon is detected only in AG-resistant species, including the most frequently encountered in cystic fibrosis patients: A. xylosoxidans, A. ruhlandii, A. dolens and A. insuavis.
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Affiliation(s)
| | - C. Neuwirth
- Corresponding author: C. Neuwirth, Laboratoire de Bactériologie, Hôpital Universitaire, Plateau technique de Biologie, BP 37013, 21070 Dijon, Cedex, France
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Abstract
Achromobacteria are ubiquitous environmental organisms that may also become opportunistic pathogens in certain conditions, such as cystic fibrosis, hematologic and solid organ malignancies, renal failure, and certain immune deficiencies. Some members of this genus, such as xylosoxidans, cause primarily nosocomially acquired infections affecting multiple organ systems, including the respiratory tract, urinary tract, and, less commonly, the cardiovascular and central nervous systems. Despite an increasing number of published case reports and literature reviews suggesting a global increase in achromobacterial disease, most clinicians remain uncertain of the organism's significance when clinically isolated. Moreover, effective treatment can be challenging due to the organism's inherent and acquired multidrug resistance patterns. We reviewed all published cases to date of non-cystic fibrosis achromobacterial lung infections to better understand the organism's pathogenic potential and drug susceptibilities. We found that the majority of these cases were community acquired, typically presenting as pneumonias (88%), and were most frequent in individuals with hematologic and solid organ malignancies. Our findings also suggest that achromobacterial lung infections are difficult to treat, but respond well to extended-spectrum penicillins and cephalosporins, such as ticarcillin, piperacillin, and cefoperazone.
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Effect of High-Dose Antimicrobials on Biofilm Growth of Achromobacter Species Isolated from Cystic Fibrosis Patients. Antimicrob Agents Chemother 2015; 60:650-2. [PMID: 26525791 DOI: 10.1128/aac.02240-15] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Accepted: 10/24/2015] [Indexed: 11/20/2022] Open
Abstract
MICs and biofilm inhibitory concentrations (BICs) were measured for 68 cystic fibrosis (CF) Achromobacter isolates for amikacin, aztreonam, colistin, levofloxacin, and tobramycin. With the exception of colistin and levofloxacin, the remaining antibiotics had MIC90s, BICs at which 50% of the isolates were susceptible (BIC50s), and BICs at which 90% of the isolates were susceptible (BIC90s) equal to or above the highest concentrations tested. In a biofilm model, tobramycin was able to significantly increase killing of bacterial cells compared to controls, for intermediate-resistant strains only, at concentrations of 1,000 and 2,000 μg/ml.
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Turon V, Trably E, Fayet A, Fouilland E, Steyer JP. Raw dark fermentation effluent to support heterotrophic microalgae growth: microalgae successfully outcompete bacteria for acetate. ALGAL RES 2015. [DOI: 10.1016/j.algal.2015.08.011] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Coward A, Kenna DTD, Perry C, Martin K, Doumith M, Turton JF. Use of nrdA gene sequence clustering to estimate the prevalence of different Achromobacter species among Cystic Fibrosis patients in the UK. J Cyst Fibros 2015; 15:479-85. [PMID: 26412052 DOI: 10.1016/j.jcf.2015.09.005] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Revised: 09/03/2015] [Accepted: 09/09/2015] [Indexed: 10/23/2022]
Abstract
BACKGROUND We aimed to estimate the prevalence of different Achromobacter species among UK Cystic Fibrosis (CF) patients. METHODS nrdA sequence clustering was used to identify 147 Achromobacter isolates from 96 patients from 27 hospitals to species level. Potential cross-infection was investigated by MLST, pulsed-field gel electrophoresis and whole genome sequencing (WGS). RESULTS Achromobacter xylosoxidans was the most prevalent species affecting 59 of 96 (61%) patients, followed by Achromobacter insuavis and Achromobacter dolens (12.4% and 8%, respectively). Three novel nrdA clusters were identified. One was further characterised by sequencing the intrinsic blaOXA gene, revealing novel variants. WGS of A. insuavis 2a isolates from four patients attending the same paediatric unit revealed that three were ST144, but differed from one another by a minimum of 385 SNPs, suggesting cross-infection was unlikely. CONCLUSIONS nrdA sequence clustering permitted an estimation of UK Achromobacter species prevalence, highlighted additional novel species, and aided cross-infection investigations.
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Affiliation(s)
- Amy Coward
- Antimicrobial Resistance and Healthcare Associated Infections (AMRHAI) Reference Unit, Public Health England, 61 Colindale Avenue, London NW9 5EQ, United Kingdom
| | - Dervla T D Kenna
- Antimicrobial Resistance and Healthcare Associated Infections (AMRHAI) Reference Unit, Public Health England, 61 Colindale Avenue, London NW9 5EQ, United Kingdom.
| | - Claire Perry
- Antimicrobial Resistance and Healthcare Associated Infections (AMRHAI) Reference Unit, Public Health England, 61 Colindale Avenue, London NW9 5EQ, United Kingdom
| | - Kate Martin
- Antimicrobial Resistance and Healthcare Associated Infections (AMRHAI) Reference Unit, Public Health England, 61 Colindale Avenue, London NW9 5EQ, United Kingdom
| | - Michel Doumith
- Antimicrobial Resistance and Healthcare Associated Infections (AMRHAI) Reference Unit, Public Health England, 61 Colindale Avenue, London NW9 5EQ, United Kingdom; Bioinformatics Unit, Public Health England, 61 Colindale Avenue, London NW9 5EQ, United Kingdom
| | - Jane F Turton
- Antimicrobial Resistance and Healthcare Associated Infections (AMRHAI) Reference Unit, Public Health England, 61 Colindale Avenue, London NW9 5EQ, United Kingdom
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Ntougias S, Tsiamis G, Soultani D, Melidis P. Dominance of rumen microorganisms during cheese whey acidification: acidogenesis can be governed by a rare Selenomonas lacticifex-type fermentation. Appl Microbiol Biotechnol 2015. [DOI: 10.1007/s00253-015-6827-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Voronina OL, Kunda MS, Ryzhova NN, Aksenova EI, Semenov AN, Lasareva AV, Amelina EL, Chuchalin AG, Lunin VG, Gintsburg AL. The Variability of the Order Burkholderiales Representatives in the Healthcare Units. BIOMED RESEARCH INTERNATIONAL 2015; 2015:680210. [PMID: 26114111 PMCID: PMC4465658 DOI: 10.1155/2015/680210] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/12/2014] [Accepted: 12/01/2014] [Indexed: 12/12/2022]
Abstract
BACKGROUND AND AIM The order Burkholderiales became more abundant in the healthcare units since the late 1970s; it is especially dangerous for intensive care unit patients and patients with chronic lung diseases. The goal of this investigation was to reveal the real variability of the order Burkholderiales representatives and to estimate their phylogenetic relationships. METHODS 16S rDNA and genes of the Burkholderia cenocepacia complex (Bcc) Multi Locus Sequence Typing (MLST) scheme were used for the bacteria detection. RESULTS . A huge diversity of genome size and organization was revealed in the order Burkholderiales that may prove the adaptability of this taxon's representatives. The following variability of the Burkholderiales in Russian healthcare units has been revealed: Burkholderiaceae (Burkholderia, Pandoraea, and Lautropia), Alcaligenaceae (Achromobacter), and Comamonadaceae (Variovorax). The Burkholderia genus was the most diverse and was represented by 5 species and 16 sequence types (ST). ST709 and 728 were transmissible and often encountered in cystic fibrosis patients and in hospitals. A. xylosoxidans was estimated by 15 genotypes. The strains of first and second ones were the most numerous. CONCLUSIONS Phylogenetic position of the genus Lautropia with smaller genome is ambiguous. The Bcc MLST scheme is applicable for all Burkholderiales representatives for resolving the epidemiological problems.
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Affiliation(s)
- Olga L. Voronina
- N.F. Gamaleya Federal Research Center for Epidemiology and Microbiology, Ministry of Health of Russia, Gamaleya Street 18, 123098 Moscow, Russia
| | - Marina S. Kunda
- N.F. Gamaleya Federal Research Center for Epidemiology and Microbiology, Ministry of Health of Russia, Gamaleya Street 18, 123098 Moscow, Russia
| | - Natalia N. Ryzhova
- N.F. Gamaleya Federal Research Center for Epidemiology and Microbiology, Ministry of Health of Russia, Gamaleya Street 18, 123098 Moscow, Russia
| | - Ekaterina I. Aksenova
- N.F. Gamaleya Federal Research Center for Epidemiology and Microbiology, Ministry of Health of Russia, Gamaleya Street 18, 123098 Moscow, Russia
| | - Andrey N. Semenov
- N.F. Gamaleya Federal Research Center for Epidemiology and Microbiology, Ministry of Health of Russia, Gamaleya Street 18, 123098 Moscow, Russia
| | - Anna V. Lasareva
- Federal State Budgetary Institution “Scientific Centre of Children Health” RAMS, 119991 Moscow, Russia
| | - Elena L. Amelina
- Research Institute of Pulmonology FMBA of Russia, 105077 Moscow, Russia
| | | | - Vladimir G. Lunin
- N.F. Gamaleya Federal Research Center for Epidemiology and Microbiology, Ministry of Health of Russia, Gamaleya Street 18, 123098 Moscow, Russia
| | - Alexandr L. Gintsburg
- N.F. Gamaleya Federal Research Center for Epidemiology and Microbiology, Ministry of Health of Russia, Gamaleya Street 18, 123098 Moscow, Russia
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Taxonomic update on proposed nomenclature and classification changes for bacteria of medical importance, 2013-2014. Diagn Microbiol Infect Dis 2015; 83:82-8. [PMID: 26014276 DOI: 10.1016/j.diagmicrobio.2015.04.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2015] [Accepted: 04/28/2015] [Indexed: 12/21/2022]
Abstract
A key aspect of medical, public health, and diagnostic microbiology laboratories is the accurate and rapid reporting and communications regarding infectious agents of clinical significance. Microbial taxonomy in the age of molecular diagnostics and phylogenetics causes changes in this taxonomy at a rapid rate further complicating this process. This review focuses on the description of new species and classification changes proposed over the past 2 years.
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Dupont C, Michon AL, Jumas-Bilak E, Nørskov-Lauritsen N, Chiron R, Marchandin H. Intrapatient diversity of Achromobacter spp. involved in chronic colonization of Cystic Fibrosis airways. INFECTION GENETICS AND EVOLUTION 2015; 32:214-23. [PMID: 25791931 DOI: 10.1016/j.meegid.2015.03.012] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Revised: 02/27/2015] [Accepted: 03/09/2015] [Indexed: 11/28/2022]
Abstract
Achromobacter spp. are increasingly identified in Cystic Fibrosis (CF) patients and their ability to persistently colonize the CF respiratory tract (CFRT) suggests that Achromobacter species possess adaptive characteristics. We studied genome dynamics in 118 isolates recovered from 13 patients with Achromobacter chronic colonization (5-26 isolates per patient recovered over 13-61 months). Isolates were identified to species level by nrdA gene sequencing, subjected to Pulsed-Field Gel Electrophoresis (PFGE) and multiplex rep-PCR (MR-PCR), and rrs intragenomic diversity was studied by PCR-Temporal Temperature Gel Electrophoresis (TTGE). Intrapatient diversity was assessed: (i) from dynamics of XbaI and/or SpeI-based pulsotypes, (ii) from comparison of MR-PCR profiles, and (iii) by longitudinal analysis of rrs intragenomic diversity. Patients were chronically colonized by Achromobacter xylosoxidans (n=10), Achromobacter dolens (n=1) or Achromobacter insuavis (n=2). All strains displayed genomic diversification over time but A. insuavis showed higher pulsotype diversity compared to other species. Intragenomic rrs heterogeneity was found in strains from 6 of 13 patients and may be persistently observed. Achromobacter genome evolution observed during chronic colonization of the CFRT warrants further investigation of the adaptation features of the different species, as well as of the selective forces driving this adaptation in the CFRT.
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Affiliation(s)
- Chloé Dupont
- Université Montpellier 1, UMR5119 ECOSYM, Equipe Pathogènes et Environnements, U.F.R des Sciences Pharmaceutiques et Biologiques, 15 avenue Charles Flahault, 34093 Montpellier Cedex 5, France
| | - Anne-Laure Michon
- Université Montpellier 1, UMR5119 ECOSYM, Equipe Pathogènes et Environnements, U.F.R des Sciences Pharmaceutiques et Biologiques, 15 avenue Charles Flahault, 34093 Montpellier Cedex 5, France; Centre Hospitalier Régional Universitaire de Montpellier, Hôpital Arnaud de Villeneuve, Laboratoire de Bactériologie, 371 avenue du Doyen Gaston Giraud, 34295 Montpellier Cedex 5, France
| | - Estelle Jumas-Bilak
- Université Montpellier 1, UMR5119 ECOSYM, Equipe Pathogènes et Environnements, U.F.R des Sciences Pharmaceutiques et Biologiques, 15 avenue Charles Flahault, 34093 Montpellier Cedex 5, France; Centre Hospitalier Régional Universitaire de Montpellier, Hôpital Saint-Eloi, Laboratoire d'Hygiène hospitalière, 80 avenue Augustin Fliche, 34295 Montpellier Cedex 5, France
| | - Niels Nørskov-Lauritsen
- Department of Clinical Microbiology, Aarhus University Hospital, Skejby, 8200 Aarhus, Denmark
| | - Raphaël Chiron
- Centre Hospitalier Régional Universitaire de Montpellier, Hôpital Arnaud de Villeneuve, Centre de Ressources et de Compétences de la Mucoviscidose, 371 avenue du Doyen Gaston Giraud, 34295 Montpellier Cedex 5, France
| | - Hélène Marchandin
- Université Montpellier 1, UMR5119 ECOSYM, Equipe Pathogènes et Environnements, U.F.R des Sciences Pharmaceutiques et Biologiques, 15 avenue Charles Flahault, 34093 Montpellier Cedex 5, France; Centre Hospitalier Régional Universitaire de Montpellier, Hôpital Arnaud de Villeneuve, Laboratoire de Bactériologie, 371 avenue du Doyen Gaston Giraud, 34295 Montpellier Cedex 5, France.
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Achromobacter bacteraemia outbreak in a paediatric onco-haematology department related to strain with high surviving ability in contaminated disinfectant atomizers. J Hosp Infect 2015; 89:116-22. [DOI: 10.1016/j.jhin.2014.07.012] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Accepted: 07/24/2014] [Indexed: 11/20/2022]
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Gomila M, Prince-Manzano C, Svensson-Stadler L, Busquets A, Erhard M, Martínez DL, Lalucat J, Moore ERB. Genotypic and phenotypic applications for the differentiation and species-level identification of achromobacter for clinical diagnoses. PLoS One 2014; 9:e114356. [PMID: 25474264 PMCID: PMC4256396 DOI: 10.1371/journal.pone.0114356] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2014] [Accepted: 11/10/2014] [Indexed: 11/18/2022] Open
Abstract
The Achromobacter is a genus in the family Alcaligenaceae, comprising fifteen species isolated from different sources, including clinical samples. The ability to detect and correctly identify Achromobacter species, particularly A. xylosoxidans, and differentiate them from other phenotypically similar and genotypically related Gram-negative, aerobic, non-fermenting species is important for patients with cystic fibrosis (CF), as well as for nosocomial and other opportunistic infections. Traditional phenotypic profile-based analyses have been demonstrated to be inadequate for reliable identifications of isolates of Achromobacter species and genotypic-based assays, relying upon comparative 16S rRNA gene sequence analyses are not able to insure definitive identifications of Achromobacter species, due to the inherently conserved nature of the gene. The uses of alternative methodologies to enable high-resolution differentiation between the species in the genus are needed. A comparative multi-locus sequence analysis (MLSA) of four selected ‘house-keeping’ genes (atpD, gyrB, recA, and rpoB) assessed the individual gene sequences for their potential in developing a reliable, rapid and cost-effective diagnostic protocol for Achromobacter species identifications. The analysis of the type strains of the species of the genus and 46 strains of Achromobacter species showed congruence between the cluster analyses derived from the individual genes. The MLSA gene sequences exhibited different levels of resolution in delineating the validly published Achromobacter species and elucidated strains that represent new genotypes and probable new species of the genus. Our results also suggested that the recently described A. spritinus is a later heterotypic synonym of A. marplatensis. Strains were analyzed, using whole-cell Matrix-Assisted Laser Desorption/Ionization Time-Of-Flight mass spectrometry (MALDI-TOF MS), as an alternative phenotypic profile-based method with the potential to support the identifications determined by the genotypic DNA sequence-based MLSA. The MALDI-TOF MS data showed good accordance in strain groupings and identifications by the MLSA data.
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Affiliation(s)
- Margarita Gomila
- Microbiology, Department of Biology, University of the Balearic Islands, Palma de Mallorca, Islas Baleares, Spain
- * E-mail:
| | - Claudia Prince-Manzano
- Microbiology, Department of Biology, University of the Balearic Islands, Palma de Mallorca, Islas Baleares, Spain
| | - Liselott Svensson-Stadler
- Department of Infectious Diseases, Culture Collection University of Gothenburg (CCUG), Sahlgrenska Academy of the University of Gothenburg, Gothenburg, Sweden
| | - Antonio Busquets
- Microbiology, Department of Biology, University of the Balearic Islands, Palma de Mallorca, Islas Baleares, Spain
| | | | - Deny L. Martínez
- Microbiology, Department of Biology, University of the Balearic Islands, Palma de Mallorca, Islas Baleares, Spain
| | - Jorge Lalucat
- Microbiology, Department of Biology, University of the Balearic Islands, Palma de Mallorca, Islas Baleares, Spain
- Mediterranean Institute for Advanced Studies (IMEDEA) (CSIC-UIB), Palma de Mallorca, Islas Baleares, Spain
| | - Edward R. B. Moore
- Department of Infectious Diseases, Culture Collection University of Gothenburg (CCUG), Sahlgrenska Academy of the University of Gothenburg, Gothenburg, Sweden
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Traglia G, Papalia M, Almuzara M, Gutkind G, Centrón D, Vay C, Radice M, Ramírez MS. Presence of OXA-Type Enzymes in Achromobacter insuavis and A. dolens. Curr Microbiol 2014; 69:501-6. [DOI: 10.1007/s00284-014-0611-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2013] [Accepted: 04/13/2014] [Indexed: 10/25/2022]
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Oren A, Garrity GM. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2014. [DOI: 10.1099/ijs.0.060285-0] [Citation(s) in RCA: 86] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The purpose of this announcement is to effect the valid publication of the following effectively published new names and new combinations under the procedure described in the Bacteriological Code (1990 Revision). Authors and other individuals wishing to have new names and/or combinations included in future lists should send three copies of the pertinent reprint or photocopies thereof, or an electronic copy of the published paper to the IJSEM Editorial Office for confirmation that all of the other requirements for valid publication have been met. It is also a requirement of IJSEM and the ICSP that authors of new species, new subspecies and new combinations provide evidence that types are deposited in two recognized culture collections in two different countries. It should be noted that the date of valid publication of these new names and combinations is the date of publication of this list, not the date of the original publication of the names and combinations. The authors of the new names and combinations are as given below. Inclusion of a name on these lists validates the publication of the name and thereby makes it available in the nomenclature of prokaryotes. The inclusion of a name on this list is not to be construed as taxonomic acceptance of the taxon to which the name is applied. Indeed, some of these names may, in time, be shown to be synonyms, or the organisms may be transferred to another genus, thus necessitating the creation of a new combination.
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Affiliation(s)
- Aharon Oren
- Department of Plant and Environmental Sciences, Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - George M. Garrity
- Department of Microbiology & Molecular Genetics, Biomedical Physical Sciences, Michigan State University, East Lansing, MI 48824-4320, USA
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A simplified sequence-based identification scheme for Bordetella reveals several putative novel species. J Clin Microbiol 2013; 52:674-7. [PMID: 24478511 DOI: 10.1128/jcm.02572-13] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The differentiation of Bordetella species, particularly those causing human infection, is problematic. We found that sequence analysis of an internal fragment of nrdA allowed differentiation of the currently named Bordetella species. Analysis of 107 "Bordetella" isolates recovered almost exclusively from human respiratory tract specimens identified several putative novel species.
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