journal
MENU ▼
Read by QxMD icon Read
search

Journal of Clinical Microbiology

journal
https://www.readbyqxmd.com/read/28637912/parallel-evaluation-of-the-maldi-sepsityper-and-verigene-bc-gn-assays-for-rapid-identification-of-gram-negative-bacilli-from-positive-blood-cultures
#1
Miguel A Arroyo, Gerald A Denys
Rapid identification of microorganisms from positive blood cultures has improved clinical management and antimicrobial stewardship. The advent of the matrix-assisted laser desorption time-of-flight Mass Spectrometry (MALDI-TOF MS) has reduced the time to identification of cultured isolates and is now often the definitive method used in the clinical microbiology laboratory. The commercial in vitro diagnostic MALDI Sepsityper (Sepsityper) kit has the potential for standardization and clinical routine use for the rapid identification of a broad range of bacteria from positive blood cultures...
June 21, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28637911/discovery-of-specific-antigens-that-can-predict-microfilarial-intensity-in-loa-loa-infection
#2
Papa M Drame, Sasisekhar Bennuru, Thomas B Nutman
Antigen-based immunoassays are currently needed for point-of-care quantification of Loa loa microfilariae (mf). Coupling transcriptomic approaches with bioinformatic analysis, we have identified 11 specific putative proteins (coding mRNAs) with potential utility as biomarkers of patent (mf (+) ) L. loa infection. We successfully developed antigen capture immunoassays to quantify 2 (LOAG_14221 and LOAG_15846) of these proteins in individual plasma/sera. Of the 2 quantifiable circulating biomarkers, LOAG_14221 showed the highest degree of specificity, particularly with a monoclonal antibody-based immunoassay...
June 21, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28637910/excellent-diagnostic-characteristics-for-ultra-fast-gene-profiling-of-defa1-il1b-ltf-in-the-detection-of-prosthetic-joint-infections
#3
Regina Fillerova, Jiri Gallo, Martin Radvansky, Veronika Kraiczova, Milos Kudelka, Eva Kriegova
The timely and exact diagnosis of prosthetic joint infection (PJI) is crucial for surgical decision-making. Intra-operatively, delivery of the result within an hour is required. Alpha-defensin lateral immunoassay of joint fluid (JF) is precise in the intra-operative exclusion of PJI, however in patients with a limited amount of JF and/or when the JF is bloody this test is unhelpful. Important information is hidden in the periprosthetic tissues that could much better reflect the current status of implant pathology...
June 21, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28637909/rapid-differentiation-of-haemophilus-influenzae-and-haemophilus-haemolyticus-using-maldi-tof-mass-spectrometry-with-clinprotools-mass-spectra-analysis
#4
Jonathan H K Chen, Vincent C C Cheng, Chun-Pong Wong, Sally C Y Wong, Wing-Cheong Yam, Kwok-Yung Yuen
Haemophilus influenzae is associated with severe invasive disease, while Haemophilus haemolyticus is considered part of the commensal flora in the human respiratory tract. Although the addition of a custom mass spectra library into the matrix-assisted laser desorption/ionization-time of flight mass spectrometry (MALDI-TOF MS) system could improve identification of these two species, the establishment of such a custom database is technically complicated and requires a large amount of resources, which most clinical laboratories cannot afford...
June 21, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28637908/rapid-filter-based-detection-and-culture-of-burkholderia-pseudomallei-from-small-volumes-of-urine
#5
Pierre A Michel, Christine Lascols, Jay E Gee, Linda M Weigel, David Sue
Clinical outcomes of melioidosis patients improve when the infecting agent, Burkholderia pseudomallei, is rapidly detected and identified by laboratory testing. Detection of B. pseudomallei DNA or recovery of the pathogen by culture from urine can support a diagnosis of melioidosis and guide patient care. Two new methods designated as Filter-Capture DNA Isolation (FCDI) and Filter Cellular Recovery (FCR) were developed to increase the sensitivity of detection and recovery of viable B. pseudomallei cells from small volumes (0...
June 21, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28637907/online-identification-of-fungi-using-maldi-tof-mass-spectrometry-validation-of-a-new-web-application
#6
A C Normand, P Becker, F Gabriel, C Cassagne, I Accoceberry, M Gari-Toussaint, L Hasseine, D De Geyter, D Pierard, I Surmont, F Djenad, J L Donnadieu, M Piarroux, S Ranque, M Hendrickx, R Piarroux
MALDI-TOF mass spectrometry has emerged as a reliable technique to identify molds involved in human diseases, including dermatophytes, provided that exhaustive reference databases are available. This study assessed an online identification application based on original algorithms and an extensive in-house reference database comprising 11,851 spectra (938 fungal species and 246 fungal genera).Validation criteria were established using an initial panel of 422 molds, including dermatophytes, previously identified via DNA sequencing (126 species)...
June 21, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28615471/clostridium-difficile-pcr-cycle-threshold-predicts-free-toxin
#7
Fiona Senchyna, Rajiv L Gaur, Saurabh Gombar, Cynthia Y Truong, Lee F Schroeder, Niaz Banaei
Background. There is no stand-alone Clostridium difficile diagnostic that can sensitively and rapidly detect fecal free toxins. We investigated the performance of C. difficile PCR cycle threshold (CT) for predicting free toxin status.Method. Consecutive stool samples (n=312) positive for toxigenic C. difficile with the GeneXpert C.diff Epi tcdB PCR assay were tested with the rapid membrane C. DIFF QUIK CHEK COMPLETE immunoassay (RMEIA). RMEIA toxin-negative samples were tested with the cell cytotoxicity neutralization assay (CCNA) and tgcBIOMICS ELISA...
June 14, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28615470/identification-of-the-group-b-streptococcus-capsule-type-using-a-dual-phenotypic-genotypic-assay
#8
Areej Alhhazmi, Armaan Pandey, Gregory J Tyrrell
The Group B streptococcus (GBS) capsular polysaccharide (CPS) is an important virulence factor which is also used for GBS typing. There are 10 CPS types (Ia, Ib and II-IX). GBS that do not phenotypically type are considered non-typable. All genes required for CPS synthesis are found on the GBS cps operon, which contains a highly variable CPS-determining region (cpsG-cpsK).The objective of this study was development of an assay to detect sialic acid on the GBS cell surface followed by a genotypic PCR CPS typing assay...
June 14, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28615469/is-this-the-carbapenemase-test-we-ve-been-waiting-for-a-multi-center-evaluation-of-the-modified-carbapenem-inactivation-method-mcim
#9
Susan M Butler-Wu, April N Abbott
A plethora of phenotypic methods exist for the detection of carbapenemases, however, clinical laboratories have struggled for years with accurate, objective phenotypic detection of carbapenemase activity in Enterobacteriaceae In this issue of the Journal of Clinical Microbiology, V. M. Pierce et al. (J Clin Microbiol 55:XXX-XXX, 2017, https://doi.org/10.1128/JCM.00193-17) report on a multicenter evaluation of the modified carbapenem inactivation method (mCIM). The high sensitivity, specificity, reproducibility and ease of interpretation associated with mCIM for Enterobacteriaceae will likely lead to its adoption by clinical laboratories...
June 14, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28615468/in-pursuit-of-the-evidence-a-short-biography-of-paul-c-schreckenberger-ph-d
#10
Karen C Carroll
On a bookshelf in my office, next to the Manual of Clinical Microbiology, still sits a dog-eared copy of a pamphlet entitled "Practical Approach to the Identification of Glucose-Nonfermenting Gram-negative Bacilli, a Guide to Identification" authored by Paul C Schreckenberger, Ph.D (1).….
June 14, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28615467/evaluation-of-the-bd-max%C3%A2-staphsr-assay-for-detecting-mrsa-and-mssa-in-eswab-collected-wound-samples
#11
Suzane Silbert, Alicia Gostnell, Carly Kubasek, Raymond Widen
Staphylococcus aureus (SA) is the most common pathogen involved in skin and soft tissue infections and it is the principal cause of surgical site infections (1, 2, 3).….
June 14, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28615466/a-pathotyping-multiplex-pcr-for-haemophilus-parasuis-a-tool-for-the-prediction-of-virulence
#12
Kate J Howell, Lucy A Weinert, Sarah E Peters, Jinhong Wang, Juan Hernandez-Garcia, Roy R Chaudhuri, Shi-Lu Luan, Øystein Angen, Virginia Aragon, Susanna M Williamson, Paul R Langford, Andrew N Rycroft, Brendan W Wren, Duncan J Maskell, Alexander W Tucker
Haemophilus parasuis is a diverse bacterial species found in the upper respiratory tract of pigs that can also cause Glässer's disease and pneumonia. A previous pan-genome study of H. parasuis identified 48 genes that were associated with clinical disease. Here we describe the development of a generalised linear model (termed a pathotyping model) to predict the potential virulence of isolates of H. parasuis, based on a subset of 10 genes from the pan-genome. A multiplex PCR (mPCR) was constructed based on these genes, the results of which were entered into the pathotyping model to yield a prediction of virulence...
June 14, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28615465/emergency-department-urinary-antibiograms-differ-by-specific-patient-groups
#13
S Jorgensen, M Zurayk, S Yeung, J Terry, M Dunn, P Nieberg, A Wong-Beringer
Background: Patients presenting to the ED represent a heterogeneous population comprised of all ages, from the community and skilled-nursing facilities (SNF), and at varying risk for resistant pathogens. The aim of this study was to compare patient group-specific urinary antibiograms in ED.Methods: Adults presented to ED with an ICD 9/10 UTI diagnosis during 7/15 - 6/16 were randomly selected (n=500) to extract relevant demographic, laboratory, and clinical data from the medical record. Urinary E. coli antibiograms were compared between: institutional vs...
June 14, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28592553/accurate-and-rapid-differentiation-of-acinetobacter-baumannii-strains-by-raman-spectroscopy-a-comparative-study
#14
Meron Ghebremedhin, Rae Heitkamp, Shubha Yesupriya, Bradford Clay, Nicole J Crane
In recent years matrix-assisted laser ionization time-of-flight mass spectrometry (MALDI-TOF MS) has become the standard for routine bacterial species identification due to its rapidity and low costs for consumables compared to traditional DNA-based methods. However, it has been observed that some bacterial species such as Acinetobacter baumannii strains cannot be reliably identified using mass spectrometry (MS). Raman spectroscopy is a rapid technique, as fast as MALDI-TOF, and has been shown to accurately identify bacterial strains and species...
June 7, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28592552/colistin-and-polymyxin-b-susceptibility-testing-for-carbapenem-resistant-and-mcr-positive-enterobacteriaceae-comparison-of-sensititre-microscan-vitek-2-and-etest-with-broth-microdilution
#15
Ka Lip Chew, My-Van La, Raymond T P Lin, Jeanette W P Teo
Colistin and polymyxin B remain part of the last line of antibiotics for multi-drug-resistant Gram negative bacteria such as carbapenem-resistant-Enterobacteriaceae Current EUCAST-CLSI joint recommendations are for broth microdilution to be performed for MIC testing of colistin. Commercial susceptibility testing methods were evaluated and compared against reference broth microdilution (BMD), using a susceptible breakpoint of ≤2mg/L for both colistin and polymyxin B. Seventy-six Enterobacteriaceae were included, of which twenty-one were mcr-1 positive...
June 7, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28592551/molecular-identification-of-saprochaete-capitata-in-human-blood-and-paraffinized-tissue-samples
#16
I Arrieta-Aguirre, P Menéndez-Manjón, M S Cuétara, L Lopez-Soria, J C García-Ruiz, M D Moragues
Invasive fungal infections (IFIs) caused by Candida and Aspergillus species are the most prevalent in hospitals; however, those caused by rare fungal species have increased in recent years.….
June 7, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28592550/validation-and-implementation-of-clinical-laboratory-improvements-act-clia-compliant-whole-genome-sequencing-in-public-health-microbiology-laboratory
#17
Varvara K Kozyreva, Chau-Linda Truong, Alexander L Greninger, John Crandall, Rituparna Mukhopadhyay, Vishnu Chaturvedi
Public health microbiology laboratories (PHL) are on the cusp of unprecedented improvements in pathogen identification, antibiotic resistance detection, and outbreak investigation by using whole genome sequencing (WGS). However, considerable challenges remain due to the lack of common standards. Herein, we describe the validation of WGS on Illumina platform for routine use in PHL according to the Clinical Laboratory Improvements Act (CLIA) guidelines for the laboratory developed tests (LDTs). We developed a validation panel comprising ten Enterobacteriaceae isolates, five Gram-positive cocci, five Gram-negative non-fermenting species, nine Mycobacterium tuberculosis, and five miscellaneous bacteria...
June 7, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28592549/emergence-of-a-staphylococcus-aureus-clone-resistant-to-mupirocin-and-fusidic-acid-carrying-exotoxin-genes-and-causing-mainly-skin-infections
#18
Anastassios Doudoulakakis, Iris Spiliopoulou, Nikolaos Spyridis, Nikolaos Giormezis, John Kopsidas, Maria Militsopoulou, Evangelia Lebessi, Maria Tsolia
Objectives: Skin and soft tissue infections (SSTIs) caused by mupirocin-resistant Staphylococcus aureus strains have recently increased in our settings. We sought to evaluate the characteristics of these cases over a 43-month period.Methods: All community-acquired staphylococcal infections caused by mupirocin-resistant strains were retrospectively reviewed. Genes encoding high level (HLR) mupirocin resistance (mupA), fusidic acid resistance (fusB), ermA, ermC, PVL (lukS/lukF-PV), exfoliative toxins (eta, etb), fibronectin binding protein A (fnbA) were investigated in 102 preserved selected strains by PCRs...
June 7, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28592548/evaluation-of-the-aptima-hiv-1-quant-dx-assay-for-hiv-1-rna-quantitation-in-different-biological-specimen-types
#19
Christina Yek, Marta Massanella, Tashi Peling, Kristen Lednovich, Sangeetha V Nair, Andrew Worlock, Milenka Vargas, Sara Gianella, Ronald J Ellis, Matthew C Strain, Michael P Busch, C Thomas Nugent, Douglas D Richman
Background The search for a cure for HIV infection has highlighted the need for increasingly sensitive and precise assays to measure viral burden in various tissues and body fluids. We describe the application of a standardized assay for HIV-1 RNA in multiple specimen types.Methods The fully automated Aptima HIV-1 Quant Dx assay (Aptima assay) is FDA-cleared for blood plasma HIV-1 RNA quantitation. In this study, the Aptima assay was applied for the quantitation of HIV RNA in peripheral blood mononuclear cells (PBMC; n=72), seminal plasma (n=20), cerebrospinal fluid (CSF; n=36), dried blood spots (DBS; n=104) and dried plasma spots (DPS; n=104)...
June 7, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28592547/performance-of-the-abbott-realtime-mtb-and-mtb-rif-inh-assays-in-a-high-tb-and-hiv-coinfection-setting-in-south-africa
#20
Lesley Scott, Anura David, Lara Noble, Matilda Nduna, Pedro Da Silva, Andrew Black, Francois Venter, Wendy Stevens
Background: South Africa is a country with a high incidence of tuberculosis (TB), complicated by coinfection with HIV. The Xpert MTB/RIF (Cepheid, Sunnyvale, CA, USA) is used in South Africa as the test for initial diagnosis of TB, and other molecular platforms such as the m2000 (Abbott Molecular, Des Plaines, IL, USA) are widely used for molecular monitoring of HIV viral load. This latter platform is now also equipped with the RealTime MTB and RealTime MTB RIF/INH assays for TB and first line drug resistance screening, but has not been evaluated in settings of HIV and TB coinfection...
June 7, 2017: Journal of Clinical Microbiology
journal
journal
26018
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"