Abstract:
:Molecular diagnostic devices are increasingly finding utility in clinical laboratories. Demonstration of the effectiveness of these devices is dependent upon comparing results from clinical samples tested with the new device to an alternative testing method. The preparation of mock clinical specimens will be necessary for the validation of molecular diagnostic devices when a sufficient number of clinical specimens is unobtainable. Examples include rare pathogens, some of which are pathogens posing a biological weapon threat. Here we describe standardized steps for developers to follow for the culture and quantification of three organisms used to spike human whole blood to create mock specimens. The three organisms chosen for this study were the Live Vaccine Strain (LVS) of Francisella tularensis, surrogate for a potential biothreat pathogen, Escherichia coli, a representative Gram-negative bacterium and Babesia microti (Franca) Reichenow Peabody strain, representing a protozoan parasite. Mock specimens were prepared with blood from both healthy donors and donors with nonspecific symptoms including fever, malaise, and flu-like symptoms. There was no significant difference in detection results between the two groups for any pathogen. Testing of the mock samples was compared on two platforms, Target Enriched Multiplex-PCR (TEM-PCR™) and singleplex real-time PCR (RT-PCR). Results were reproducible on both platforms. The reproducibility demonstrated by obtaining the same results between two testing methods and between healthy and symptomatic mock specimens, indicates the standardized methods described for creating the mock specimens are valid and effective for evaluating diagnostic devices.
journal_name
J Microbiol Methodsjournal_title
Journal of microbiological methodsauthors
Hockman D,Dong M,Zheng H,Kumar S,Huff MD,Grigorenko E,Beanan M,Duncan Rdoi
10.1016/j.mimet.2016.11.005subject
Has Abstractpub_date
2017-01-01 00:00:00pages
76-82eissn
0167-7012issn
1872-8359pii
S0167-7012(16)30314-1journal_volume
132pub_type
杂志文章abstract::Viability PCR (v-PCR) as a method to selectively detect intact live cells has gained considerable interest over the last years with an increasing number of applications. The principle is based on treatment of microbiological samples with a viability dye prior to extraction of genomic DNA and its amplification. The dye...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2013.01.018
更新日期:2013-04-01 00:00:00
abstract::Idiopathic interstitial pneumonias are interstitial lung diseases of unknown etiology which prognosis is usually fatal. Microbiota associated to bronchoalveolar lavage from 20 patients with negative bacterial cultures was explored by 16S-rDNA PCR-DGGE, showing a clearly negative relation among the presence of P. jirov...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2010.03.026
更新日期:2010-07-01 00:00:00
abstract::Despite its long-standing history as a model organism, Neurospora crassa has limited tools for repetitive gene deletions utilizing recyclable self-excising marker systems. Here we describe, for the first time, the functionality of a bacterial recombination system employing β-recombinase acting on six recognition seque...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2012.12.004
更新日期:2013-03-01 00:00:00
abstract::This study compared an automated Escherichia coli and coliform detection system with the membrane filtration direct count technique for water testing. The automated instrument performed equal to or better than the membrane filtration test in analyzing E. coli-spiked samples and blind samples with interference from Pro...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2009.08.009
更新日期:2009-10-01 00:00:00
abstract::The mesophilic fungus Eupenicillium parvum 4-14 is an important producer of thermotolerant hemicellulolytic and cellulolytic enzymes. The aim of this study was to establish a method for genetic manipulation of the fungus by Agrobacterium tumefaciens. The promotor PgpdA of a glyceraldehyde-3-phosphate dehydrogenase gen...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2018.01.013
更新日期:2018-03-01 00:00:00
abstract::A method to detect and enumerate bacterial colonies grown on membrane filters (MF) was described. The colonies were stained with an ethanolic solution of 0.1% Amido black 10B. The procedure yielded the rapid detection of colonies as compared to a conventional plate counting method. ...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/s0167-7012(03)00170-2
更新日期:2003-11-01 00:00:00
abstract::Mycobacterium avium subsp. paratuberculosis (MAP) is the etiologic agent of paratuberculosis, a chronic granulomatous enteric disease of ruminants. MAP detection by faecal culture provides the definitive diagnosis of the infection. Automated liquid systems for MAP culture are more sensitive and rapid than culture on s...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2011.01.019
更新日期:2011-03-01 00:00:00
abstract::The ideal ecological metabolic activity assay would be applied to naturally occurring microbial populations immediately fixed in the field, and the assay would focus upon intracellular parameters indicative of a dynamic biogeochemical process. In this study, fluorescent in situ hybridization (FISH) with tyramide signa...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/s0167-7012(02)00015-5
更新日期:2002-06-01 00:00:00
abstract::Sensitive real-time sequence detection methods based on two different chemistries were developed for Mycobacterium avium subsp. paratuberculosis (Map), the causative agent of Johne's disease in cattle. One is based on the detection of SYBR Green bound to PCR products and the second method is more specific, detecting t...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2005.04.004
更新日期:2005-12-01 00:00:00
abstract::Analysis of microbial communities is of broad interest in biology and high throughput sequencing is now the preferred method. However, some studies may not need the level of detail high throughput sequencing provides and its cost may limit the number of samples that can be sequenced. High resolution melting analysis (...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2017.07.006
更新日期:2017-09-01 00:00:00
abstract::This paper describes a simple method for the isolation of salt-tolerant myxobacteria from marine conditions. As the results show in this paper, salt-tolerant myxobacteria are found to be able to grow, but unable to form fruiting bodies at high salt concentrations. The fruiting body structures of the salt-tolerant stra...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/s0167-7012(02)00029-5
更新日期:2002-07-01 00:00:00
abstract::Rapid and sensitive detection of extended-spectrum β-lactamases (ESBLs) is essential for infection control and antimicrobial treatment. Recently, a matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS)-based MBT STAR-BL software module has been used for detecting β-lactamase activ...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2019.105734
更新日期:2019-12-01 00:00:00
abstract::Lactobacillus animalis NP51 is a direct-fed microbial strain (DFM) extensively used as a pre-harvest food safety mitigation in feedlot cattle due to its antagonistic effects against human foodborne pathogens such as Salmonella and Escherichia coli O157:H7. NP51 not only promotes overall gut health but interferes with ...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2018.04.012
更新日期:2018-06-01 00:00:00
abstract::Sequences in public databases may contain a number of sequencing errors. A double binomial model describing the distribution of indel-excluded similarity coefficients (S) among repeatedly sequenced 16S rRNA was previously developed and it produced a confidence interval of S useful for testing sequence identity among s...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2007.11.013
更新日期:2008-02-01 00:00:00
abstract::A simple, rapid, sensitive microtiter plate method detecting N-acyl homoserine lactone (HSL)-related compounds was established using an Agrobacterium tumefaciens strain harboring a traG::lacZ/traR reporter gene responsive to HSLs. This strain did not produce its own HSL, but the traG::lacZ reporter gene was induced on...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2005.06.003
更新日期:2006-04-01 00:00:00
abstract::Although epitope tagging has been widely used for analyzing protein function in many organisms, there are few genetic tools for epitope tagging in Tetrahymena. In this study, we describe several C-terminal epitope tagging modules that can be used to express tagged proteins in Tetrahymena cells by both plasmid- and PCR...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2010.07.009
更新日期:2010-09-01 00:00:00
abstract::Leishmaniasis is a disease, caused by Leishmania parasites, which infect humans and animals, posing a major social and economic burden worldwide. The need for accurate and sensitive disease diagnosis led to the widespread adoption of PCR amplification. Detection of the amplification products (i.e. gel electrophoresis)...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2016.05.027
更新日期:2016-08-01 00:00:00
abstract::A new concept for multiplex detection and quantification of microbes is here demonstrated on a range of infectious fungal species. Padlock probe methodology in conjunction with qPCR and Luminex technology was used for simultaneous detection of ten fungal species in one single experiment. By combining the multiplexing ...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2009.05.016
更新日期:2009-08-01 00:00:00
abstract::In this research work, the synthesis of Ag doped hydroxyapatite coatings for dental or orthopedic implants was performed. The main goal was to determine the influence of Ag content on the roughness and antimicrobial performance of the prepared thin films. The films were deposited on Ti6Al4V alloy by means of RF magnet...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2016.03.016
更新日期:2016-06-01 00:00:00
abstract:BACKGROUND:In a two-stage exchange protocol for prosthetic joint infection (PJI), bacteria surviving over the antibiotic-loaded cement spacers may cause the persistence of infection with renewed clinical symptoms following the surgery. Culture after sonication of removed prosthesis is more sensitive than conventional p...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2018.12.006
更新日期:2019-01-01 00:00:00
abstract::A rapid immunological method for trapping and selection of functionally regulated prokaryotic promoters is described. The method is based on application of a novel mini-Tn5 derived promoter probe (pUTTKZY-promoterless lacZY as a reporter and kanamycin resistance) to mutagenise a plant growth promoting fluorescent pseu...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/s0167-7012(00)00139-1
更新日期:2000-06-01 00:00:00
abstract::The aim of the present investigation was to develop a novel approach for rapid identification and differentiation of Pseudomonas aeruginosa clones from Canadian cystic fibrosis patients by capillary electrophoresis-mass spectrometry. We screened P. aeruginosa isolates for lipopolysaccharide structure and presence/abse...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2008.10.008
更新日期:2009-02-01 00:00:00
abstract::The functional mcrA gene of methanogens can generate phylogeny as congruent as the 16S rRNA gene phylogeny. For the mcrA sequences amplified by mlas/mcrA-rev primers, we created a database for taxonomical classification and propose cut-off values for OTU clustering and further analysis of α- and β-diversity with the M...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2014.05.006
更新日期:2014-08-01 00:00:00
abstract::Listeria monocytogenes internalin gene inlJ has been described previously for differentiation of virulent from avirulent strains. However, a recent report indicated that there exist some unusual lineage IIIB strains (e.g., serotype 7 strain R2-142) that possess no inlJ gene but have the capacity to cause mouse mortali...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2007.08.007
更新日期:2007-11-01 00:00:00
abstract::A 16S rRNA gene-based fingerprinting method was developed for the identification of Azotobacteraceae and tested onto 48 soil isolates and 28 reference strains belonging to the free-living nitrogen-fixing bacterial group and to the most common species found in soil samples. According to this method, the 16S rRNA gene w...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2004.01.006
更新日期:2004-05-01 00:00:00
abstract::Rapid and accurate detection of the pathogens that cause gastrointestinal infection is important for appropriate therapy and proper infection control. This study assesses the performance of a new molecular assay for simultaneous detection of 13 different gastrointestinal bacteria in stool specimens. Using the Allplex ...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2017.10.016
更新日期:2018-01-01 00:00:00
abstract::A sensitive, selective, and rapid protocol for detecting Ralstonia solanacearum from soil and plant tissues was developed based on the integration of the rapid self-replicating ability of bacteriophages with quantitative PCR (q-PCR). Six bacteriophages were isolated and selected for their ability to specifically infec...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2008.11.008
更新日期:2009-03-01 00:00:00
abstract::We developed an immunocapture-based polymerase chain reaction (PCR) assay for simultaneous detection of Cryptosporidium parvum oocysts and Giardia intestinalis cysts in surface water. Using primer pairs Cry9/Cry15 and LaxA/LaxB for Cryptosporidium and Gdh1/Gdh4 for Giardia, the sensitivity of the entire detection proc...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/s0167-7012(02)00047-7
更新日期:2002-08-01 00:00:00
abstract::In this report, a passive microfluidic chip design was developed for fast and sensitive fluorometric determination of Escherichia coli (E. coli) based on sandwich immunoassay. Initially, magnetic nanoparticles (MNPs) and chitosan modified mercaptopropionic acid capped cadmium telluride (CdTe) quantum dots (QDs) were f...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2019.105680
更新日期:2019-09-01 00:00:00
abstract::The description of microbial diversity by molecular culture-independent techniques most often involves the amplification of the 16S rRNA by PCR gene and either analysis of the diversity of amplified molecules (community fingerprinting) that allows the simultaneous study of many samples or the cloning and sequencing of...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/s0167-7012(99)00011-1
更新日期:1999-05-01 00:00:00