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Waris RS, Ballard M, Hong D, Seddik TB. Meningitis due to Roseomonas in an immunocompetent adolescent. Access Microbiol 2021; 3:000213. [PMID: 34151165 PMCID: PMC8209696 DOI: 10.1099/acmi.0.000213] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Accepted: 02/21/2021] [Indexed: 11/29/2022] Open
Abstract
Both bacterial and aseptic meningitis can complicate neurosurgery, but they are often difficult to distinguish clinically or by cerebrospinal fluid (CSF) analysis. We present an adolescent with subacute meningitis after neurosurgery, eventually diagnosed with meningitis caused by Roseomonas mucosa via 16S rRNA gene sequencing after two negative CSF cultures. He was treated successfully with intravenous meropenem with full recovery. This case shows that distinguishing bacterial from aseptic meningitis is important to allow directed antibiotic therapy. We recommend considering bacterial meningitis in the differential diagnosis of aseptic meningitis complicating neurosurgery, and to perform molecular diagnostics such as bacterial sequencing if the suspicion of bacterial meningitis is high.
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Affiliation(s)
- Rabbia S Waris
- Pediatric Hospital Medicine, Stanford University, Stanford, CA, USA
| | - Melissa Ballard
- Pediatric Neurosurgery, Lucile Packard Children's Hospital, Stanford, CA, USA
| | - David Hong
- Pediatric Neurosurgery, Stanford University, Stanford, CA, USA
| | - Talal B Seddik
- Pediatric Infectious Diseases, Stanford University, Stanford, CA, USA
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2
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Lazzarini TA, Al-khersan H, Patel NA, Yannuzzi NA, Martinez JD, Altamirano D, Torres LK, Miller D, Batlle JF, Amescua G, Flynn HW. Chronic, Recurrent Bacterial Endophthalmitis Caused by Achromobacter xylosoxidans: Clinical Features and Management. Int Med Case Rep J 2020; 13:265-269. [PMID: 32753980 PMCID: PMC7358084 DOI: 10.2147/imcrj.s259899] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2020] [Accepted: 06/08/2020] [Indexed: 01/15/2023] Open
Abstract
A 79-year-old man presented to a tertiary referral center from the Dominican Republic with an opaque corneal graft and a diagnosis of chronic, recurrent culture-positive Achromobacter xylosoxidans endophthalmitis of the left eye. The patient had a history of penetrating keratoplasty for Fuchs' dystrophy and had undergone multiple intraocular surgeries including pars plana vitrectomy and anterior chamber wash out for the diagnosis and management of chronic endophthalmitis. After being referred, the patient underwent a third PKP, removal of his intraocular lens (IOL), capsulectomy, and injection of intravitreal antibiotics. All surgical specimens demonstrated the growth of A. xylosoxidans. Five months after surgery, the graft remained clear without evidence of infection and best-corrected visual acuity was 20/350.
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Affiliation(s)
- Thomas A Lazzarini
- Department of Ophthalmology, Bascom Palmer Eye Institute, University of Miami, Miller School of Medicine, Miami, FL, 33136, USA
| | - Hasenin Al-khersan
- Department of Ophthalmology, Bascom Palmer Eye Institute, University of Miami, Miller School of Medicine, Miami, FL, 33136, USA
| | - Nimesh A Patel
- Department of Ophthalmology, Bascom Palmer Eye Institute, University of Miami, Miller School of Medicine, Miami, FL, 33136, USA
| | - Nicolas A Yannuzzi
- Department of Ophthalmology, Bascom Palmer Eye Institute, University of Miami, Miller School of Medicine, Miami, FL, 33136, USA
| | - Jaime D Martinez
- Department of Ophthalmology, Bascom Palmer Eye Institute, University of Miami, Miller School of Medicine, Miami, FL, 33136, USA
| | - Diego Altamirano
- Department of Ophthalmology, Bascom Palmer Eye Institute, University of Miami, Miller School of Medicine, Miami, FL, 33136, USA
| | | | - Darlene Miller
- Department of Ophthalmology, Bascom Palmer Eye Institute, University of Miami, Miller School of Medicine, Miami, FL, 33136, USA
| | - Juan F Batlle
- Department of Ophthalmology, Bascom Palmer Eye Institute, University of Miami, Miller School of Medicine, Miami, FL, 33136, USA
- Laser Center, Santo Domingo, Dominican Republic
| | - Guillermo Amescua
- Department of Ophthalmology, Bascom Palmer Eye Institute, University of Miami, Miller School of Medicine, Miami, FL, 33136, USA
| | - Harry W Flynn
- Department of Ophthalmology, Bascom Palmer Eye Institute, University of Miami, Miller School of Medicine, Miami, FL, 33136, USA
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3
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Seth-Smith HMB, Casanova C, Sommerstein R, Meinel DM, Abdelbary MMH, Blanc DS, Droz S, Führer U, Lienhard R, Lang C, Dubuis O, Schlegel M, Widmer A, Keller PM, Marschall J, Egli A. Phenotypic and Genomic Analyses of Burkholderia stabilis Clinical Contamination, Switzerland. Emerg Infect Dis 2020; 25:1084-1092. [PMID: 31107229 PMCID: PMC6537712 DOI: 10.3201/eid2506.172119] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
A recent hospital outbreak related to premoistened gloves used to wash patients exposed the difficulties of defining Burkholderia species in clinical settings. The outbreak strain displayed key B. stabilis phenotypes, including the inability to grow at 42°C; we used whole-genome sequencing to confirm the pathogen was B. stabilis. The outbreak strain genome comprises 3 chromosomes and a plasmid, sharing an average nucleotide identity of 98.4% with B. stabilis ATCC27515 BAA-67, but with 13% novel coding sequences. The genome lacks identifiable virulence factors and has no apparent increase in encoded antimicrobial drug resistance, few insertion sequences, and few pseudogenes, suggesting this outbreak was an opportunistic infection by an environmental strain not adapted to human pathogenicity. The diversity among outbreak isolates (22 from patients and 16 from washing gloves) is only 6 single-nucleotide polymorphisms, although the genome remains plastic, with large elements stochastically lost from outbreak isolates.
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4
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Seth-Smith HM, Casanova C, Sommerstein R, Meinel DM, Abdelbary MM, Blanc DS, Droz S, Führer U, Lienhard R, Lang C, Dubuis O, Schlegel M, Widmer A, Keller PM, Marschall J, Egli A. Phenotypic and Genomic Analyses of Burkholderia stabilisClinical Contamination, Switzerland. Emerg Infect Dis 2019. [DOI: 10.3201/eid2406.172119] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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5
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Burkholderia cepacia complex Cervical Osteomyelitis in an Intravenous Drug User. Case Rep Infect Dis 2018; 2018:7638639. [PMID: 30271645 PMCID: PMC6151243 DOI: 10.1155/2018/7638639] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Accepted: 08/19/2018] [Indexed: 01/17/2023] Open
Abstract
Gram-negative vertebral osteomyelitis infections are increasing due to rising intravenous drug use but overall remain uncommon. Here, we present a case of Burkholderia cepacia complex cervical osteomyelitis in an intravenous drug user. Burkholderia cepaciacomplex vertebral osteomyelitis has been infrequently described in the literature thus far with varied antibiotic treatment regimens. A 68-year-old male presented to the emergency department with neck pain after minor trauma. He endorsed active intravenous heroin and methamphetamine use. CT and MRI imaging of the cervical spine revealed destructive changes of C5-C6 vertebral bodies consistent with osteomyelitis. Neurological exam was stable and vital signs were within normal limits; so, antibiotics were held, and he was admitted for diagnostic evaluation. Five sets of blood cultures were drawn on admission and were ultimately negative. He subsequently underwent C5-C6 corpectomy, C4-C7 anterior fusion, and C3-T1 posterior fusion with allograft placement. Deep operative tissue cultures grew Burkholderia cepacia complex. He was treated with 6 weeks of intravenous ceftazidime followed by indefinite oral minocycline due to hardware placement. Burkholderia cepacia complex should be considered among pathogenic etiologies of pyogenic vertebral osteomyelitis, particularly among patients with intravenous drug use. Ceftazidime monotherapy was an effective treatment in this particular case.
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6
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Eladli MG, Alharbi NS, Khaled JM, Kadaikunnan S, Alobaidi AS, Alyahya SA. Antibiotic-resistant Staphylococcus epidermidis isolated from patients and healthy students comparing with antibiotic-resistant bacteria isolated from pasteurized milk. Saudi J Biol Sci 2018; 26:1285-1290. [PMID: 31516359 PMCID: PMC6733385 DOI: 10.1016/j.sjbs.2018.05.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2018] [Revised: 04/22/2018] [Accepted: 05/03/2018] [Indexed: 11/30/2022] Open
Abstract
Antibiotic-resistant Staphylococci are a global issue affecting humans, animals, and numerous natural environments. Antibiotic-resistant Staphylococcus epidermidis is an opportunistic pathogen frequently isolated from patients and healthy individuals. This study aimed to examine the antibiotic resistance of S. epidermidis isolated from patients, healthy students and compare the results with antibiotic-resistant bacteria isolated from pasteurized milk. Clinical strain isolation was performed in several hospitals in the Riyadh. Skin swabs from 100 healthy undergraduate candidate students were obtained at King Saud University. The pasteurized milk samples were obtained from local market (company, X). After isolation, identification and susceptibility tests were performed using an automated system. A multiplex tuf gene-based PCR assay was used to confirm identification. Biofilm production and biofilm-related gene expression were studied. S. epidermidis represented 17% of clinical bacterial isolates, and 1.7% of isolates obtained from healthy students were multiantibiotic-resistant. All patient strains were teicoplanin- and vancomycin-susceptible, while all student strains were gentamicin-, levofloxacin-, moxifloxacin-, and trimethoprim/sulfamethoxazole-susceptible. All the bacteria isolated from pasteurized milk were benzylpenicillin and oxacillin-resistant strains. Of the S. epidermidis strains, 91% could produce biofilms, and mecA, icaADBR, ica-ADB, ica-AD, ica-A only, and ica-C only were expressed in 83, 17.1, 25.7, 37.1, 20, and 0% of the strains, respectively. This work demonstrates that S. epidermidis can be accurately identified using a multiplex tuf-based assay, and that multiantibiotic-resistant S. epidermidis strains are widespread amongst patients and healthy students.
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Affiliation(s)
- Mohammed G Eladli
- Department of Botany and Microbiology, College of Science, King Saud University, PO Box 4255, Riyadh 11451, Saudi Arabia
| | - Naiyf S Alharbi
- Department of Botany and Microbiology, College of Science, King Saud University, PO Box 4255, Riyadh 11451, Saudi Arabia
| | - Jamal M Khaled
- Department of Botany and Microbiology, College of Science, King Saud University, PO Box 4255, Riyadh 11451, Saudi Arabia.,Department of Biotechnology and Food Technology, Thamar University, Yemen
| | - Shine Kadaikunnan
- Department of Botany and Microbiology, College of Science, King Saud University, PO Box 4255, Riyadh 11451, Saudi Arabia
| | - Ahmed S Alobaidi
- Department of Botany and Microbiology, College of Science, King Saud University, PO Box 4255, Riyadh 11451, Saudi Arabia
| | - Sami A Alyahya
- National Center for Biotechnology, King Abdulaziz City for Science and Technology, Riyadh 11442, Saudi Arabia
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7
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Fernández-Cuenca F, Tomás M, Tormo N, Gimeno C, Bou G, Pascual Á. Reporting identification of Acinetobacter spp genomic species: A nationwide proficiency study in Spain. Enferm Infecc Microbiol Clin 2018; 37:89-92. [PMID: 29605096 DOI: 10.1016/j.eimc.2018.02.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Revised: 02/01/2018] [Accepted: 02/07/2018] [Indexed: 11/25/2022]
Abstract
Acinetobacter baumannii is the most important genomic species of Acinetobacter from a clinical and epidemiological point of view. Nevertheless, genomic species other than A. baumannii are increasingly recognized as nosocomial pathogens. Molecular methods of identification (genotypic and proteomic assays) are more accurate and reliable and have greater discriminatory power than phenotypic methods. Eleven genomic species of Acinetobacter spp. (8 A. baumannii, 1 A. pittii, 1 A. nosocomialis and 1 A. lwoffii) with different antimicrobial resistance phenotypes and mechanisms of resistance to antimicrobial agents were sent to 48 participating Spanish centers to evaluate their ability for correct identification at the genomic species level. Identification of the genomic species was performed at the two Clinical Microbiology reference laboratories (Hospital Universitario Virgen Macarena, Seville, Spain; and Complejo Hospitalario Universitario de A Coruña, A Coruña, Spain) by partial DNA sequencing of the rpoB gene and MALDI-TOF. The mean percentage of agreement was 76.1%. Fifty percent of CC-01 (A. pittii) and 50% of CC-02 (A. nosocomialis) identification results were reported as A. baumannii. Discrepancies by type of systems used for identification were: MicroScan WA (51.1%), Vitek 2 (19.5%), MALDI-TOF (18.0%), Phoenix (4.5%), Wider (3.8%) and API 20 NE (3.0%). In conclusion, clinical microbiology laboratories must improve their ability to correctly identify the most prevalent non A. baumannii genomic species.
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Affiliation(s)
- Felipe Fernández-Cuenca
- Unidad Clínica de Enfermedades Infecciosas y Microbiología Clínica y Medicina, Hospital Universitario Virgen Macarena, Sevilla, Spain; Departamento de Microbiología, Universidad de Sevilla, Sevilla, Spain; Spanish Network for the Research in Infectious Diseases (REIPIRD12/0015), Instituto de Salud Carlos III, Madrid, Spain; Instituto de Biomedicina de Sevilla IBIs, Sevilla, Spain.
| | - María Tomás
- Spanish Network for the Research in Infectious Diseases (REIPIRD12/0015), Instituto de Salud Carlos III, Madrid, Spain; Servicio de Microbiología, Complexo Hospitalario Universitario de A Coruña (CHUAC), A Coruña, Spain; Instituto de Investigación Biomédica (INIBIC) , A Coruña, Spain
| | - Nuria Tormo
- Servicio de Microbiología, Hospital General de Valencia, Valencia, Spain
| | - Concha Gimeno
- Servicio de Microbiología, Hospital General de Valencia, Valencia, Spain
| | - Germán Bou
- Spanish Network for the Research in Infectious Diseases (REIPIRD12/0015), Instituto de Salud Carlos III, Madrid, Spain; Servicio de Microbiología, Complexo Hospitalario Universitario de A Coruña (CHUAC), A Coruña, Spain; Instituto de Investigación Biomédica (INIBIC) , A Coruña, Spain
| | - Álvaro Pascual
- Unidad Clínica de Enfermedades Infecciosas y Microbiología Clínica y Medicina, Hospital Universitario Virgen Macarena, Sevilla, Spain; Departamento de Microbiología, Universidad de Sevilla, Sevilla, Spain; Spanish Network for the Research in Infectious Diseases (REIPIRD12/0015), Instituto de Salud Carlos III, Madrid, Spain; Instituto de Biomedicina de Sevilla IBIs, Sevilla, Spain
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8
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Jhingan M, Balakrishnan D, Rani PK, Tyagi M, Joseph J. Microbiological Characteristics and Clinical Outcomes of Acinetobacter spp. Endophthalmitis with the First Reported Case of Acinetobacter haemolyticus Endophthalmitis. Semin Ophthalmol 2017; 33:477-481. [DOI: 10.1080/08820538.2017.1301498] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Mahima Jhingan
- Kannuri Santhamma Centre for Vitreoretinal Diseases, L. V. Prasad Eye Institute, Hyderabad, India
| | - Divya Balakrishnan
- Kannuri Santhamma Centre for Vitreoretinal Diseases, L. V. Prasad Eye Institute, Hyderabad, India
| | - Padmaja Kumari Rani
- Kannuri Santhamma Centre for Vitreoretinal Diseases, L. V. Prasad Eye Institute, Hyderabad, India
| | - Mudit Tyagi
- Kannuri Santhamma Centre for Vitreoretinal Diseases, L. V. Prasad Eye Institute, Hyderabad, India
| | - Joveeta Joseph
- Jhaveri Microbiology Centre, L.V. Prasad Marg, Banjara Hills, Hyderabad, Telangana, India
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9
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Khan S, Kumar A. Microbial identification systems: Making us tilt at windmills? Indian J Med Microbiol 2016; 34:260-1. [DOI: 10.4103/0255-0857.176849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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10
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Multicenter Evaluation of the Bruker MALDI Biotyper CA System for the Identification of Clinical Aerobic Gram-Negative Bacterial Isolates. PLoS One 2015; 10:e0141350. [PMID: 26529504 PMCID: PMC4631355 DOI: 10.1371/journal.pone.0141350] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Accepted: 10/06/2015] [Indexed: 11/19/2022] Open
Abstract
The prompt and accurate identification of bacterial pathogens is fundamental to patient health and outcome. Recent advances in matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) have revolutionized bacterial identification in the clinical laboratory, but uniform incorporation of this technology in the U.S. market has been delayed by a lack of FDA-cleared systems. In this study, we conducted a multicenter evaluation of the MALDI Biotyper CA (MBT-CA) System (Bruker Daltonics Inc, Billerica, MA) for the identification of aerobic gram-negative bacteria as part of a 510(k) submission to the FDA. A total of 2,263 aerobic gram negative bacterial isolates were tested representing 23 genera and 61 species. Isolates were collected from various clinical sources and results obtained from the MBT-CA System were compared to DNA sequencing and/or biochemical testing. Isolates that failed to report as a "high confidence species ID" [log(score) ≥2.00] were re-tested using an extraction method. The MBT-CA System identified 96.8% and 3.1% of isolates with either a "high confidence" or a "low confidence" [log(score) value between 1.70 and <2.00] species ID, respectively. Two isolates did not produce acceptable confidence scores after extraction. The MBT-CA System correctly identified 99.8% (2,258/2,263) to genus and 98.2% (2,222/2,263) to species level. These data demonstrate that the MBT-CA System provides accurate results for the identification of aerobic gram-negative bacteria.
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11
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Use of 16S rRNA gene-based sequencing for identification of Oligella urethralis that was misidentified as Fransciella tularensis by an automated system. JMM Case Rep 2015. [DOI: 10.1099/jmmcr.0.000092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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12
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A type III secretion negative clinical strain of Pseudomonas aeruginosa employs a two-partner secreted exolysin to induce hemorrhagic pneumonia. Cell Host Microbe 2014; 15:164-76. [PMID: 24528863 DOI: 10.1016/j.chom.2014.01.003] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2013] [Revised: 12/05/2013] [Accepted: 01/02/2014] [Indexed: 11/21/2022]
Abstract
Virulence of Pseudomonas aeruginosa is typically attributed to its type III secretion system (T3SS). A taxonomic outlier, the P. aeruginosa PA7 strain, lacks a T3SS locus, and no virulence phenotype is attributed to PA7. We characterized a PA7-related, T3SS-negative P. aeruginosa strain, CLJ1, isolated from a patient with fatal hemorrhagic pneumonia. CLJ1 is highly virulent in mice, leading to lung hemorrhage and septicemia. CLJ1-infected primary endothelial cells display characteristics of membrane damage and permeabilization. Proteomic analysis of CLJ1 culture supernatants identified a hemolysin/hemagglutinin family pore-forming toxin, Exolysin (ExlA), that is exported via ExlB, representing a putative two-partner secretion system. A recombinant P. aeruginosa PAO1ΔpscD::exlBA strain, deficient for T3SS but engineered to express ExlA, gained lytic capacity on endothelial cells and full virulence in mice, demonstrating that ExlA is necessary and sufficient for pathogenicity. This highlights clinically relevant T3SS-independent hypervirulence, isolates, and points to a broader P. aeruginosa pathogenic repertoire.
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13
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Investigating specific bacterial resistance to AMPs by using a magainin I-resistant Escherichia coli model. J Antibiot (Tokyo) 2014; 67:681-7. [DOI: 10.1038/ja.2014.48] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2013] [Revised: 02/17/2014] [Accepted: 03/24/2014] [Indexed: 11/09/2022]
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14
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Boszczowski I, do Prado GVB, Dalben MF, Telles RCP, Freire MP, Guimarães T, Oliveira MS, Rosa JF, Soares RE, Llacer PED, Dulley FL, Costa SF, Levin AS. Polyclonal outbreak of bloodstream infections caused by Burkholderia cepacia complex in hematology and bone marrow transplant outpatient units. Rev Inst Med Trop Sao Paulo 2014; 56:71-6. [PMID: 24553612 PMCID: PMC4085834 DOI: 10.1590/s0036-46652014000100011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2013] [Accepted: 05/23/2013] [Indexed: 11/22/2022] Open
Abstract
Aim: The objective was to describe an outbreak of bloodstream infections
by Burkholderia cepacia complex (Bcc) in bone marrow transplant and
hematology outpatients. Methods: On February 15, 2008 a Bcc outbreak was suspected. 24 cases
were identified. Demographic and clinical data were evaluated. Environment and
healthcare workers' (HCW) hands were cultured. Species were determined and typed.
Reinforcement of hand hygiene, central venous catheter (CVC) care, infusion therapy,
and maintenance of laminar flow cabinet were undertaken. 16 different HCWs had cared
for the CVCs. Multi-dose heparin and saline were prepared on counter common to both
units. Findings: 14 patients had B. multivorans (one patient
had also B. cenopacia), six non-multivorans Bcc and
one did not belong to Bcc. Clone A B. multivorans occurred in 12
patients (from Hematology); in 10 their CVC had been used on February 11/12.
Environmental and HCW cultures were negative. All patients were treated with
meropenem, and ceftazidime lock-therapy. Eight patients (30%) were hospitalized. No
deaths occurred. After control measures (multidose vial for single patient; CVC lock
with ceftazidime; cleaning of laminar flow cabinet; hand hygiene improvement; use of
cabinet to store prepared medication), no new cases occurred. Conclusions: This polyclonal outbreak may be explained by a common
source containing multiple species of Bcc, maybe the laminar flow cabinet common to
both units. There may have been contamination by B. multivorans
(clone A) of multi-dose vials.
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Affiliation(s)
- Icaro Boszczowski
- Infection Control Department, Hospital das Clinicas, Universidade de São Paulo, SP, Brazil, Infection Control Department, Hospital das Clinicas, Universidade de São Paulo, SP, Brazil
| | - Gladys Villas Boas do Prado
- Infection Control Department, Hospital das Clinicas, Universidade de São Paulo, SP, Brazil, Infection Control Department, Hospital das Clinicas, Universidade de São Paulo, SP, Brazil
| | - Mirian F Dalben
- Infection Control Department, Hospital das Clinicas, Universidade de São Paulo, SP, Brazil, Infection Control Department, Hospital das Clinicas, Universidade de São Paulo, SP, Brazil
| | - Roberto C P Telles
- Department of Infectious Diseases and LIM-54, University of São Paulo, São PauloSP, Brazil, Department of Infectious Diseases and LIM-54, University of São Paulo, São Paulo, SP, Brazil
| | - Maristela Pinheiro Freire
- Infection Control Department, Hospital das Clinicas, Universidade de São Paulo, SP, Brazil, Infection Control Department, Hospital das Clinicas, Universidade de São Paulo, SP, Brazil
| | - Thaís Guimarães
- Infection Control Department, Hospital das Clinicas, Universidade de São Paulo, SP, Brazil, Infection Control Department, Hospital das Clinicas, Universidade de São Paulo, SP, Brazil
| | - Maura S Oliveira
- Infection Control Department, Hospital das Clinicas, Universidade de São Paulo, SP, Brazil, Infection Control Department, Hospital das Clinicas, Universidade de São Paulo, SP, Brazil
| | - Juliana F Rosa
- Department of Infectious Diseases and LIM-54, University of São Paulo, São PauloSP, Brazil, Department of Infectious Diseases and LIM-54, University of São Paulo, São Paulo, SP, Brazil
| | - Robson E Soares
- Department of Infectious Diseases and LIM-54, University of São Paulo, São PauloSP, Brazil, Department of Infectious Diseases and LIM-54, University of São Paulo, São Paulo, SP, Brazil
| | - Pedro Enrique Dorlhiac Llacer
- Hematology Unit, Hospital das Clínicas, University of São Paulo, São PauloSP, Brazil, Hematology Unit, Hospital das Clínicas, University of São Paulo, São Paulo, SP, Brazil
| | - Frederico Luiz Dulley
- Chief of Bone Marrow Transplant Unit, Hospital das Clínicas, University of São Paulo, São PauloSP, Brazil, Chief of Bone Marrow Transplant Unit, Hospital das Clínicas, University of São Paulo, São Paulo, SP, Brazil
| | - Silvia F Costa
- Department of Infectious Diseases and LIM-54, University of São Paulo, São PauloSP, Brazil, Department of Infectious Diseases and LIM-54, University of São Paulo, São Paulo, SP, Brazil
| | - Anna S Levin
- Infection Control Department, Hospital das Clinicas, Universidade de São Paulo, SP, Brazil, Infection Control Department, Hospital das Clinicas, Universidade de São Paulo, SP, Brazil
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15
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Abstract
Survival has improved in patients with cystic fibrosis (CF), in part because of aggressive antimicrobial management. Two multidrug-resistant environmental bacteria, the Burkholderia cepacia group and nontuberculous mycobacteria, have emerged. Improving genomic and proteomic technologies are allowing better identification of bacteria and fungi found in the CF lung and detection of viral agents that may be associated with pulmonary exacerbations. Anaerobic bacteria and Streptococcus angionsus group organisms may play a role in chronic CF lung infections. The diversity of organisms declines perhaps as a result of aggressive antimicrobial therapy, and an apex predator, Pseudomonas aeruginosa, may emerge in many patients with CF.
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16
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Gallo SW, Ramos PL, Ferreira CAS, Oliveira SDD. A specific polymerase chain reaction method to identify Stenotrophomonas maltophilia. Mem Inst Oswaldo Cruz 2014; 108:S0074-02762013000300390. [PMID: 23778655 DOI: 10.1590/s0074-02762013000300020] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2012] [Accepted: 10/18/2012] [Indexed: 12/22/2022] Open
Abstract
Stenotrophomonas maltophilia is a multidrug-resistant nosocomial pathogen that is difficult to identify unequivocally using current methods. Accordingly, because the presence of this microorganism in a patient may directly determine the antimicrobial treatment, conventional polymerase chain reaction (PCR) and real-time PCR assays targeting 23S rRNA were developed for the specific identification of S. maltophilia. The PCR protocol showed high specificity when tested against other species of Stenotrophomonas, non-fermentative Gram-negative bacilli and 100 clinical isolates of S. maltophilia previously identified using the Vitek system.
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Affiliation(s)
- Stephanie Wagner Gallo
- Pontifícia Universidade Católica do Rio Grande do Su, Faculdade de Biociências, Departamento de Biologia Celular e Molecular, Laboratório de Imunologia e Microbiologia, Porto Alegre, RS, Brasil
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17
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Yoo SH, Kim MJ, Roh KH, Kim SH, Park DW, Sohn JW, Yoon YK. Liver abscess caused by Brevundimonas vesicularis in an immunocompetent patient. J Med Microbiol 2012; 61:1476-1479. [PMID: 22767540 DOI: 10.1099/jmm.0.045120-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Invasive infections caused by Brevundimonas vesicularis are very rare in humans. We experienced an unusual case of liver abscess due to B. vesicularis in an immunocompetent young male. The patient was successfully treated by liver abscess drainage and with antimicrobial therapy of ceftriaxone followed by ampicillin/sulbactam. The organism found in the aspiration culture of the abscess material was initially reported, by using a VITEK 2 system, as Sphingomonas paucimobilis. However, later, B. vesicularis was confirmed as the true pathogen through 16S rRNA gene sequencing. To our knowledge, this is the first case of liver abscess caused by B. vesicularis.
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Affiliation(s)
- Seu Hee Yoo
- Division of Infectious Diseases, Department of Internal Medicine, Korea University College of Medicine, Seoul, Republic of Korea
| | - Min Ja Kim
- Division of Infectious Diseases, Department of Internal Medicine, Korea University College of Medicine, Seoul, Republic of Korea
| | - Kyoung Ho Roh
- Department of Laboratory Medicine, Korea University College of Medicine, Seoul, Republic of Korea
| | - Si Hyun Kim
- Division of Infectious Diseases, Department of Internal Medicine, Korea University College of Medicine, Seoul, Republic of Korea
| | - Dae Won Park
- Division of Infectious Diseases, Department of Internal Medicine, Korea University College of Medicine, Seoul, Republic of Korea
| | - Jang Wook Sohn
- Division of Infectious Diseases, Department of Internal Medicine, Korea University College of Medicine, Seoul, Republic of Korea
| | - Young Kyung Yoon
- Division of Infectious Diseases, Department of Internal Medicine, Korea University College of Medicine, Seoul, Republic of Korea
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18
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Tsai MT, Yang WC, Lin CC. Continuous ambulatory peritoneal dialysis-related exit-site infections caused by Achromobacter denitrificans and A. xylosoxidans. Perit Dial Int 2012; 32:362-3. [PMID: 22641747 DOI: 10.3747/pdi.2011.00207] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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19
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20
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Zhu S, Ratering S, Schnell S, Wacker R. Matrix-assisted laser desorption and ionization-time-of-flight mass spectrometry, 16S rRNA gene sequencing, and API 32E for identification of Cronobacter spp.: a comparative study. J Food Prot 2011; 74:2182-7. [PMID: 22186062 DOI: 10.4315/0362-028x.jfp-11-205] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Twenty-two isolates of the family Enterobacteriaceae, with focus on Cronobacter isolated from infant formula and the environment of milk powder plants, were comparatively identified using API 32E (bioMérieux, Marcy l'Etoile, France), 16S rRNA gene sequencing (Accugenix, Newark, USA), and matrix-assisted laser desorption and ionization-time-of-flight mass spectrometry (MALDI-TOF MS; Mabritec, Riehen, Switzerland and AnagnosTec, Potsdam, Germany). With API 32E, 22% of the isolates were assigned to species, 64% were assigned to a genus, and 14% could not be discriminated at any taxonomic level. Both 16S rRNA gene sequencing and MALDI-TOF MS assigned 100% of the isolates to species, but the identifications based on MALDI-TOF MS results were more discriminating and unequivocal. Our data indicate that MALDI-TOF MS provides the most rapid and unambiguous identification of Cronobacter and closely related Enterobacteriaceae isolates.
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Affiliation(s)
- Sha Zhu
- Central Laboratories Friedrichsdorf, Bahnstr. 14-30, 61381 Friedrichsdorf, Germany
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21
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Jin WY, Jang SJ, Lee MJ, Park G, Kim MJ, Kook JK, Kim DM, Moon DS, Park YJ. Evaluation of VITEK 2, MicroScan, and Phoenix for identification of clinical isolates and reference strains. Diagn Microbiol Infect Dis 2011; 70:442-7. [PMID: 21767700 DOI: 10.1016/j.diagmicrobio.2011.04.013] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2011] [Revised: 04/18/2011] [Accepted: 04/29/2011] [Indexed: 11/25/2022]
Abstract
To compare the identification accuracies of VITEK 2 (bioMérieux), MicroScan (Siemens Healthcare), and Phoenix (Becton Dickinson), microbial identification was performed on 160 clinical isolates and 50 reference strains on each of these 3 systems, using the appropriate identification kit provided by each system. Of the 142 clinical isolates that were identified at the species level, VITEK 2, MicroScan, and Phoenix correctly identified 93.7%, 82.4%, and 93.0%, and incorrectly identified 2.1%, 7.0%, and 0%, respectively. In the reference strain tests, VITEK 2, MicroScan, and Phoenix correctly identified 55.3%, 54.4%, and 78.0% of the reference strains at the species level and incorrectly identified 10.6%, 13.0%, and 6.0% of the reference strains, respectively. In conclusion, the identification rate of VITEK 2, Phoenix, and MicroScan was high or acceptable on clinical isolates. Phoenix showed a significantly higher performance than VITEK 2 or MicroScan in identifying the reference strains.
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Affiliation(s)
- Won-Young Jin
- Department of Laboratory Medicine, Chosun University Medical School, Gwang-Ju, South Korea
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22
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Rampini SK, Bloemberg GV, Keller PM, Büchler AC, Dollenmaier G, Speck RF, Böttger EC. Broad-Range 16S rRNA Gene Polymerase Chain Reaction for Diagnosis of Culture-Negative Bacterial Infections. Clin Infect Dis 2011; 53:1245-51. [DOI: 10.1093/cid/cir692] [Citation(s) in RCA: 121] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
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23
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Mahlen SD, Clarridge JE. Evaluation of a selection strategy before use of 16S rRNA gene sequencing for the identification of clinically significant gram-negative rods and coccobacilli. Am J Clin Pathol 2011; 136:381-8. [PMID: 21846913 DOI: 10.1309/ajcp61cgnxcxvspr] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
Abstract
Although 16S ribosomal RNA (rRNA) gene sequencing is well established for correctly identifying bacteria, its most efficient use in a routine clinical laboratory is not clear. We devised and evaluated a strategy to select gram-negative rods and coccobacilli (GNRCB) for which sequencing might be necessary before routine identification methods had been exhausted. The prospectively applied selection criteria were primarily based on the isolate's display of unusual or discordant phenotypic results and/or disease correlation. By using this strategy, we selected a total of 120 GNRCB (representing only ∼2% of all identified). The strategy was demonstrated to be efficient because the preliminary phenotypic identification for 79.2% of those isolates needed revision (18.2% were novel and about a third would have required further extensive testing). The knowledge that 1.6% (ie, 79% of 2%) of isolated GNRCB might benefit from sequence identification could provide guidelines for routine clinical laboratories toward efficient use of sequence analysis.
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Affiliation(s)
- Steven D. Mahlen
- Department of Laboratory Medicine, University of Washington, Seattle
| | - Jill E. Clarridge
- Department of Laboratory Medicine, University of Washington, Seattle
- Department of Pathology and Laboratory Medicine Service, Veterans Affairs Puget Sound Health Care System, Seattle
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24
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Pinot C, Deredjian A, Nazaret S, Brothier E, Cournoyer B, Segonds C, Favre-Bonté S. Identification of Stenotrophomonas maltophilia strains isolated from environmental and clinical samples: a rapid and efficient procedure. J Appl Microbiol 2011; 111:1185-93. [DOI: 10.1111/j.1365-2672.2011.05120.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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25
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Le Coustumier A, Njamkepo E, Cattoir V, Guillot S, Guiso N. Bordetella petrii infection with long-lasting persistence in human. Emerg Infect Dis 2011; 17:612-8. [PMID: 21470449 PMCID: PMC3377417 DOI: 10.3201/eid1704.101480] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
B. petrii infection can persist in persons with chronic obstructive pulmonary disease. We report the repeated isolation of Bordetella petrii in the sputum of a 79-year-old female patient with diffuse bronchiectasis and persistence of the bacterium for >1 year. The patient was first hospitalized due to dyspnea, which developed into severe cough with purulent sputum that yielded B. petrii on culture. After this first episode, the patient was hospitalized an additional 4 times with bronchorrhea symptoms. The isolates collected were analyzed by using biochemical, genotypic, and proteomic tools. Expression of specific proteins was analyzed by using serum samples from the patient. The B. petrii isolates were compared with other B. petrii isolates collected from humans or the environment and with isolates of B. pertussis, B. parapertussis, B. bronchiseptica, and B. holmesii, obtained from human respiratory tract infections. Our observations indicate that B. petrii can persist in persons with chronic pulmonary obstructive disease as has been previously demonstrated for B. bronchiseptica.
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Phoenix 100 versus Vitek 2 in the identification of gram-positive and gram-negative bacteria: a comprehensive meta-analysis. J Clin Microbiol 2011; 49:3284-91. [PMID: 21752980 DOI: 10.1128/jcm.00182-11] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Phoenix 100 and Vitek 2 (operating with the current colorimetric cards) are commonly used in hospital laboratories for rapid identification of microorganisms. The present meta-analysis aims to evaluate and compare their performance on Gram-positive and Gram-negative bacteria. The MEDLINE database was searched up to October 2010 for the retrieval of relevant articles. Pooled correct identification rates were derived from random-effects models, using the arcsine transformation. Separate analyses were conducted at the genus and species levels; subanalyses and meta-regression were undertaken to reveal meaningful system- and study-related modifiers. A total of 29 (6,635 isolates) and 19 (4,363 isolates) articles were eligible for Phoenix and colorimetric Vitek 2, respectively. No significant differences were observed between Phoenix and Vitek 2 either at the genus (97.70% versus 97.59%, P = 0.919) or the species (92.51% versus 88.77%, P = 0.149) level. Studies conducted with conventional comparator methods tended to report significantly better results compared to those using molecular reference techniques. Speciation of Staphylococcus aureus was significantly more accurate in comparison to coagulase-negative staphylococci by both Phoenix (99.78% versus 88.42%, P < 0.00001) and Vitek 2 (98.22% versus 91.89%, P = 0.043). Vitek 2 also reached higher correct identification rates for Gram-negative fermenters versus nonfermenters at the genus (99.60% versus 95.90%, P = 0.004) and the species (97.42% versus 84.85%, P = 0.003) level. In conclusion, the accuracy of both systems seems modified by underlying sample- and comparator method-related parameters. Future simultaneous assessment of the instruments against molecular comparator procedures may facilitate interpretation of the current observations.
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27
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Jacquier H, Carbonnelle E, Corvec S, Illiaquer M, Monnier A, Bille E, Zahar JR, Beretti JL, Jauréguy F, Fihman V, Tankovic J, Cattoir V. Revisited distribution of nonfermenting Gram-negative bacilli clinical isolates. Eur J Clin Microbiol Infect Dis 2011; 30:1579-86. [DOI: 10.1007/s10096-011-1263-5] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2010] [Accepted: 03/28/2011] [Indexed: 12/01/2022]
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28
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Lee G, Hong JH. Xanthogranulomatous pyelonephritis with nephrocutaneous fistula due to Providencia rettgeri infection. J Med Microbiol 2011; 60:1050-1052. [PMID: 21459904 DOI: 10.1099/jmm.0.028977-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
We describe what is to our knowledge the first case of xanthogranulomatous pyelonephritis combined with nephrocutaneous fistula caused by Providencia rettgeri. Surgical extirpation including nephrectomy and fistulectomy was successfully performed. The strain was identified by 16S rRNA gene sequencing in both renal tissue and pus culture from the fistula.
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Affiliation(s)
- Gilho Lee
- Department of Urology, Dankook University College of Medicine, Cheonan, Republic of Korea
| | - Jeong Hee Hong
- Department of Urology, Dankook University College of Medicine, Cheonan, Republic of Korea
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29
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Phenotypic and molecular characterization of Acinetobacter clinical isolates obtained from inmates of California correctional facilities. J Clin Microbiol 2011; 49:2121-31. [PMID: 21450955 DOI: 10.1128/jcm.02373-10] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Acinetobacter spp. increasingly have been wreaking havoc in hospitals and communities worldwide. Although much has been reported regarding Acinetobacter isolates responsible for nosocomial infections, little is known about these organisms in correctional facilities. In this study, we performed species identification, examined the antibiotic resistance profiles, and determined the mechanisms of resistance and clonal relationships of 123 Acinetobacter isolates obtained from inmates of 20 California correctional facilities (CCFs). We found that 57.7% of the isolates belong to A. baumannii, followed by isolates of Acinetobacter genomic species 3 (gen. sp. 3; 23.6%) and of Acinetobacter gen. sp. 13TU (10.6%). Multidrug-resistant (MDR) CCF isolates were found in only six CCFs. Additionally, DNA sequences of gyrA and parC genes were consistent with fluoroquinolone (FQ) susceptibility phenotypes. Furthermore, the presence of class 1 integrons was detected in 15 CCF isolates, all of which are MDR. Integron-associated gene cassettes encode several aminoglycoside modification enzymes, which correlate with most of the aminoglycoside-resistant phenotypes. Antimicrobial susceptibility testing in the presence of Phe-Arg-β-naphthylamide dihydrochloride and 1-(1-naphthylmethyl)-piperazine indicated the involvement of efflux pumps in the FQ resistance of only a few CCF isolates. Finally, genetic profiling showed that there was no evidence of A. baumannii outbreaks in CCFs. Instead, our analyses revealed only limited clonal dissemination of mostly non-MDR A. baumannii strains in a few facilities. This study represents the first report to characterize phenotypic and molecular features of Acinetobacter isolates in correctional facilities, which provides a baseline for monitoring the antimicrobial resistance changes and dissemination patterns of these organisms in such specialized institutions.
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Sönksen UW, Christensen JJ, Nielsen L, Hesselbjerg A, Hansen DS, Bruun B. Fastidious Gram-Negatives: Identification by the Vitek 2 Neisseria-Haemophilus Card and by Partial 16S rRNA Gene Sequencing Analysis. Open Microbiol J 2010; 4:123-31. [PMID: 21347215 PMCID: PMC3043276 DOI: 10.2174/1874285801004010123] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2010] [Revised: 10/31/2010] [Accepted: 11/02/2010] [Indexed: 11/22/2022] Open
Abstract
Taxonomy and identification of fastidious Gram negatives are evolving and challenging. We compared identifications achieved with the Vitek 2 Neisseria-Haemophilus (NH) card and partial 16S rRNA gene sequence (526 bp stretch) analysis with identifications obtained with extensive phenotypic characterization using 100 fastidious Gram negative bacteria. Seventy-five strains represented 21 of the 26 taxa included in the Vitek 2 NH database and 25 strains represented related species not included in the database. Of the 100 strains, 31 were the type strains of the species. Vitek 2 NH identification results: 48 of 75 database strains were correctly identified, 11 strains gave `low discrimination´, seven strains were unidentified, and nine strains were misidentified. Identification of 25 non-database strains resulted in 14 strains incorrectly identified as belonging to species in the database. Partial 16S rRNA gene sequence analysis results: For 76 strains phenotypic and sequencing identifications were identical, for 23 strains the sequencing identifications were either probable or possible, and for one strain only the genus was confirmed. Thus, the Vitek 2 NH system identifies most of the commonly occurring species included in the database. Some strains of rarely occurring species and strains of non-database species closely related to database species cause problems. Partial 16S rRNA gene sequence analysis performs well, but does not always suffice, additional phenotypical characterization being useful for final identification.
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Affiliation(s)
- Ute Wolff Sönksen
- Department of Clinical Microbiology, Hillerød Hospital, Hillerød, Denmark
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31
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Preiswerk B, Ullrich S, Speich R, Bloemberg GV, Hombach M. Human infection with Delftia tsuruhatensis isolated from a central venous catheter. J Med Microbiol 2010; 60:246-248. [PMID: 20965913 DOI: 10.1099/jmm.0.021238-0] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
We present the case of a patient with catheter-related infection caused by Delftia tsuruhatensis, a newly described species closely related to Delftia acidovorans (formerly Comamonas acidovorans). To date, D. tsuruhatensis has not been described as a pathogen. To the best of our knowledge, this is the first report describing D. tsuruhatensis as the causative agent of a human infection.
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Affiliation(s)
- Benjamin Preiswerk
- Clinic and Policlinic for Internal Medicine, University Hospital of Zurich, Raemisstrasse 100, 8091 Zurich, Switzerland
| | - Silvia Ullrich
- Clinic and Policlinic for Internal Medicine, University Hospital of Zurich, Raemisstrasse 100, 8091 Zurich, Switzerland
| | - Rudolf Speich
- Clinic and Policlinic for Internal Medicine, University Hospital of Zurich, Raemisstrasse 100, 8091 Zurich, Switzerland
| | - Guido V Bloemberg
- Institute for Medical Microbiology, University of Zurich, Gloriastrasse 30/32, 8006 Zurich, Switzerland
| | - Michael Hombach
- Institute for Medical Microbiology, University of Zurich, Gloriastrasse 30/32, 8006 Zurich, Switzerland
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32
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Recognition of potentially novel human disease-associated pathogens by implementation of systematic 16S rRNA gene sequencing in the diagnostic laboratory. J Clin Microbiol 2010; 48:3397-402. [PMID: 20631113 DOI: 10.1128/jcm.01098-10] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Clinical isolates that are difficult to identify by conventional means form a valuable source of novel human pathogens. We report on a 5-year study based on systematic 16S rRNA gene sequence analysis. We found 60 previously unknown 16S rRNA sequences corresponding to potentially novel bacterial taxa. For 30 of 60 isolates, clinical relevance was evaluated; 18 of the 30 isolates analyzed were considered to be associated with human disease.
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Abstract
Six patients with Acinetobacter genomic species 10 bacteremia were identified. The clinical features of the patients, phenotypic and genotypic identifications, antimicrobial susceptibilities, and genes flanking ISAba1 of the bacteria were described. The results revealed that this bacterium is a potentially lethal pathogen that can cause health care-associated infections in debilitated patients.
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34
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Liaqat I, Sabri AN. Isolation and characterization of biocides resistant bacteria from dental unit water line biofilms. J Basic Microbiol 2009; 49:275-84. [DOI: 10.1002/jobm.200800212] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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35
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New Vitek 2 colorimetric GN Card for identification of gram-negative nonfermentative bacilli. J Clin Microbiol 2008; 45:4094; author reply 4094-5. [PMID: 18056829 DOI: 10.1128/jcm.01457-07] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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