| 41. |
- Oldberg, Karl, et al.
(författare)
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Enterococcus faecalis in blood cultures—a prospective study on the role of persistent bacteremia
- 2021
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Ingår i: Diagnostic Microbiology and Infectious Disease. - : Elsevier BV. - 0732-8893. ; 101:1
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Tidskriftsartikel (refereegranskat)abstract
- Enterococcus faecalis can cause infective endocarditis and other complicated infections. We prospectively investigate the incidence of persistent bacteremia with E. faecalis. Of 50 episodes with monomicrobial E. faecalis bacteremia the control blood culture after 48 to 72 hours was positive in 5 episodes (10%) of which 4 had a complicated focal infection.
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| 42. |
- Rockabrand, David M, et al.
(författare)
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Enterotoxigenic Escherichia coli colonization factor types collected from 1997 to 2001 in US military personnel during operation Bright Star in northern Egypt.
- 2006
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Ingår i: Diagnostic microbiology and infectious disease. - : Elsevier BV. - 0732-8893. ; 55:1, s. 9-12
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Tidskriftsartikel (refereegranskat)abstract
- Operation Bright Star (OBS) is a biennial, multinational exercise in Egypt involving 15000 US troops. Consistent with past observations in deployed troops, diarrhea is the most significant cause of morbidity. Focused efforts are ongoing to develop vaccines against the most common pathogens affecting our troops. As part of these efforts, diarrhea surveillance was conducted during OBS to monitor pathogens associated with illness and to identify new vaccine targets. A retrospective review was conducted of prior studies with similar methods. Soldiers with diarrhea presenting to the OBS clinic provided a stool sample that was inoculated into Carey-Blair transport media. Within 3 days, the Cary-Blair tubes were transported to the Naval Medical Research Unit no. 3 in Cairo where bacterial culture was performed. As part of the evaluation, 5 Escherichia coli-like colonies were collected and tested for toxin production using the GM1-ELISA. Toxin-positive isolates were further tested for colonization factors (CF) by a dot-blot assay using a standardized panel of monoclonal antibodies against CFA/I, CS1-CS7, CS17, CS8 (CFA/III), CS12 (PCFO159), and CS14 (PCFO166). Enterotoxigenic E. coli (ETEC) was the most frequently isolated pathogen during each OBS from which data were collected. The rate of ETEC-associated diarrhea ranged from 22% to 58%. Over time, there were dramatic shifts in the frequency and distribution of CFs. Over the 5 years of study, an increasing number of ETEC isolates had no known CF identified, and in 2001, only 40% of ETEC was associated with known CFs. The most commonly identified CF was CS6. Diarrheal disease, particularly ETEC, continues to be a common malady among US military personnel deployed to Egypt. We have identified ETEC CF types, especially CS6, which should be considered potential vaccine candidates. However, despite intensive testing, CFs could not be identified in most of the ETEC isolated, highlighting the need for further studies to identify novel CFs and alternative vaccine targets.
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| 43. |
- Ryding, Ulf, et al.
(författare)
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Evaluation of seven different enzyme-linked immunosorbent assays for serodiagnosis of Staphylococcus aureus bacteremia
- 2002
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Ingår i: Diagnostic Microbiology and Infectious Disease. - 1879-0070. ; 42:1, s. 9-15
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Tidskriftsartikel (refereegranskat)abstract
- Objective: Serologic assays for Staphylococcus aureus antibodies were evaluated regarding their ability to differentiate between uncomplicated and complicated S. aureus bacteremia, between S. aureus and non-S. aureus bacteremia, and between S. aureus and non-S. aureus endocarditis. Methods: Enzyme-linked immunosorbent assays (ELISAs) were performed to measure Ig G antibodies against seven S. altreus antigens (peptidoglycan, teichoic acid, S. aureus ultrasonicate, whole S. aureus cells, a-toxin, lipase and capsular polysaccharide) in 129 patients with S. aureus bacteremia (including 51 with endocarditis), 78 patients with non-S. aureus bacteremia (including 27 with endocarditis) and 100 febrile non-bacteremic controls. Results: Whole-cell ELISA was the most sensitive assay. The specificity of all assays was low. Two different combinations of ELISAs for whole cells, teichoic acid, a-toxin, lipase and capsular polysaccharide did distinguish between S. aureus and non-S. aureus endocarditis, but not between uncomplicated and complicated S. aureus bacteremia. (C) 2002 Elsevier Science Inc. All rights reserved.
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| 44. |
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| 45. |
- Trell, Kristina, et al.
(författare)
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Clinical and microbiological features of bacteremia with Streptococcus equi
- 2017
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Ingår i: Diagnostic Microbiology and Infectious Disease. - : Elsevier BV. - 0732-8893. ; 87:2, s. 196-198
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Tidskriftsartikel (refereegranskat)abstract
- Streptococcus equi (SE) rarely causes human infections. We identified 18 SE isolates from blood cultures. The focus of infection was unknown (n = 5), arthritis (n = 3), catheter-related (n = 2), pneumonia (n = 2), or other (n = 6). There were no fatalities. Several patients had animal contacts but there were no indications of clonal outbreaks.
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| 46. |
- Trell, Kristina, et al.
(författare)
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Species and emm-type distribution of group C and G streptococci from different sites of isolation
- 2016
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Ingår i: Diagnostic Microbiology and Infectious Disease. - : Elsevier BV. - 0732-8893. ; 86:4, s. 467-469
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Tidskriftsartikel (refereegranskat)abstract
- beta-Haemolytic streptococci of groups C (GCS) and G (GGS) from human infections typically belong to Streptococcus dysgalactiae and are important human pathogens. Among GGS (183 isolates), several emm-types were identified without significant differences between different sites of isolation. For GCS (79 isolates), the type-distribution was markedly different and more restricted.
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| 47. |
- Zhao, M. C., et al.
(författare)
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Clinical evaluation of a new single-tube multiplex reverse transcription PCR assay for simultaneous detection of 11 respiratory viruses, Mycoplasma pneumoniae and Chlamydia in hospitalized children with acute respiratory infections
- 2017
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Ingår i: Diagnostic Microbiology and Infectious Disease. - : Elsevier BV. - 0732-8893. ; 88:2, s. 115-119
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Tidskriftsartikel (refereegranskat)abstract
- Respiratory Pathogen 13 Detect:ion Kit (13x kit) is able to simultaneously detect 11 respiratory viruses, Mycoplasma pneumoniae (MP) and Chlamydia in a single reaction. Using 572 Nasopharyngeal aspirates collected from hospitalized children, the clinical performance of 13x kit for detecting 11 respiratory viruses was evaluated in comparison with a routinely used 2-tube multiplex reverse transcription PCR assay (2-tube assay) at provincial Centers for Disease Control and Prevention in China. The clinical performance of 13x kit for detecting MP and Chlamydia was evaluated by commercial real-time quantitative PCR (qPCR) kits or sequencing. For tested viruses, the assay concordance was 95.98% and the kappa coefficient was 0.89. All the MP and Chlamydia positive samples detected by 13x kit were confirmed as true positives. The utilization of the 13x kit in clinical settings will be helpful for doctors to assess clinical outcome according to virus type or multiple infections, and to limit the use of antibiotics. (C) 2017 Elsevier Inc. All rights reserved.
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| 48. |
- Öberg, Jonas, et al.
(författare)
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Improved identification of Streptococcus bovis-Streptococcus equinus-complex species and subspecies by MALDI-TOF MS using a novel library
- 2023
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Ingår i: Diagnostic Microbiology and Infectious Disease. - 0732-8893. ; 107:3
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Tidskriftsartikel (refereegranskat)abstract
- ObjectivesTo develop an in-house matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) library for improved identification of species and subspecies of the Streptococcus bovis/Streptococcus equinus-complex (SBSEC).Methods236 SBSEC isolates from blood stream infections and culture collections, determined by whole genome sequencing to subspecies level, were grown in brain heart infusion broth. Mass spectra were collected using the Bruker MALDI Biotyper system after ethanol-formic acid extraction. Main spectral profiles from 117 isolates were used to create the “SBSEC-CMRS library”. The remaining 119 spectra were used for evaluation of Bruker MBT Compass Library Revision K (2022) and the SBSEC-CMRS library.ResultsThe Bruker library correctly identified species and subspecies in 72/119 (61 %) isolates, while the SBSEC-CMRS library identified 116/119 (97 %), using a cutoff score of ≥2.0.ConclusionsThe SBSEC-CMRS library showed sufficient diagnostic accuracy, and can be implemented in clinical practice for SBSEC species and subspecies identification.KeywordsStreptococcus bovisStreptococcus gallolyticusMALDI-TOF MSsubspecies identificationAbbreviationsMALDI-TOF MSMatrix-assisted laser desorption/ionization time-of-flight mass spectrometrySBSECStreptococcus bovis/Streptococcus equinus-complexCMRSClinical Microbiology Region SkåneSBSEC-CMRS libraryStreptococcus bovis/Streptococcus equinus-complex-Clinical Microbiology Region Skåne librarySg pasteurianusStreptococcus gallolyticus subsp. pasteurianusSg gallolyticusStreptococcus gallolyticus subsp. gallolyticusSg macedonicusS. gallolyticus subsp. macedonicusSi infantariusS. infantarius subsp. infantariusBHIBrain heart infusionWGSWhole genome sequencing
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