Abstract:
:Aggregatibacter (A.) actinomycetemcomitans is a periodontopathogenic bacterium causing aggressive periodontitis. Here we describe a single-step transconjugation system as novel and easily applicable protocol for site-specific genetic manipulation of A. actinomycetemcomitans. Deletion of PgaC, which is involved in the synthesis of biofilm matrix, led to a reduced biofilm formation.
journal_name
J Microbiol Methodsjournal_title
Journal of microbiological methodsauthors
Stumpp NS,Konze SA,Gerardy-Schahn R,Stiesch M,Buettner FFRdoi
10.1016/j.mimet.2018.04.002subject
Has Abstractpub_date
2018-05-01 00:00:00pages
74-77eissn
0167-7012issn
1872-8359pii
S0167-7012(18)30084-8journal_volume
148pub_type
杂志文章abstract::The susceptibility protocol established in this study takes into account that complex media are capable to buffer H2O2 which otherwise may adulterate test results. Furthermore, we demonstrate that clinical isolates of Staphylococcus aureus showed a higher resistance against H2O2 than Streptococcus pyogenes after 30 mi...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2018.11.001
更新日期:2018-12-01 00:00:00
abstract::Site-directed mutagenesis is one of the most widely used techniques in life sciences. Here we describe an improved and simplified method for introducing mutations at desired sites. It consists of an inverse PCR using a plasmid template and two partially complementary primers. The synthesis step is followed by annealin...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2014.08.003
更新日期:2014-11-01 00:00:00
abstract::To ensure quality management during the production processes of probiotics and for efficacy testing in vivo, accurate tools are needed for the identification and quantification of probiotic strains. In this study, a strain-specific qPCR assay based on Suppression Subtractive Hybridisation (SSH) for identifying unique ...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2016.02.011
更新日期:2016-04-01 00:00:00
abstract::Recently, a unique method for bacterial transformation using nanofibers to inoculate DNA has been developed by Naoto Yoshida and colleagues. We have verified the principle, transforming Escherichia coli, Yersinia enterocolitica and Acinetobacter baumannii, and have established a user-friendly protocol. A buffered susp...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2009.12.002
更新日期:2010-02-01 00:00:00
abstract::Metagenomic sequencing of bacterial samples has become the gold standard for profiling microbial populations, but 16S rRNA profiling remains widely used due to advantages in sample throughput, cost, and sensitivity even though the approach is hampered by primer bias and lack of specificity. We hypothesized that a hybr...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2018.09.019
更新日期:2018-11-01 00:00:00
abstract::The biotechnologically important white-rot fungus Physisporinus vitreus was co-cultivated with Agrobacterium tumefaciens AGL-1 carrying plasmids with nourseothricin resistance as the selectable marker gene and red fluorescence protein as a visual marker. Mitotically stable transformed isolates were obtained showing re...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2013.09.001
更新日期:2013-11-01 00:00:00
abstract::Geosmin is a volatile fungal metabolite with an earthy aroma produced in grape products from rotten grapes. The accumulation of geosmin in grapes is caused by the interaction of Botrytis cinerea and Penicillium expansum. Solid Phase Microextraction (SPME) has great utility for collecting volatile compounds in wine. Ho...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2010.07.013
更新日期:2010-10-01 00:00:00
abstract::The aim of this study was to demonstrate that flow cytometry (FACS) could potentially be employed for rapid viability assessment of probiotic bacteria immobilized or encapsulated in complex matrices. Lactobacillus rhamnosus GG was immobilized within six different protein environments using whey protein isolate (WPI) a...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2010.07.003
更新日期:2010-09-01 00:00:00
abstract::Mycobacterium tuberculosis (MTB) is the causative agent of pulmonary tuberculosis. Rapid and accurate diagnosis is crucial to tuberculosis control and prevention. A series of diagnostic methods has been available for MTB detection; however, new rapid, simple and affordable methods are needed. In this study, a multiple...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2017.11.003
更新日期:2018-02-01 00:00:00
abstract::Fourier transform-infrared (FT-IR) spectroscopy has been used to rapidly and nondestructively analyze bacteria, bacteria-polymer mixtures, digester samples and microbial biofilms. Diffuse reflectance FT-IR (DRIFT) analysis of freeze-dried, powdered samples offered a means of obtaining structural information. The bac...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/0167-7012(85)90023-5
更新日期:1985-01-01 00:00:00
abstract::We have developed a method to identify and amplify differential fragments between two complex genomes. This technique, named hybridization-monitored genome differential analysis (HMDA), incorporates a monitor system into a PCR-based solid subtraction hybridization that tracks the entire hybridization process. This is ...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2005.05.010
更新日期:2006-03-01 00:00:00
abstract::Complementation of chromosomal mutations in trans can introduce artifacts due to the number of episomal copies of the gene in question. One solution is to study the gene expressed at a single ectopic site in cis. We have designed and constructed a vector that allows homologous recombination into a gene encoding a fram...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2004.02.014
更新日期:2004-06-01 00:00:00
abstract::Surface interfacial physiology is particularly important to unicellular organisms with regard to maintenance of optimal cell function. Bacterial cell surfaces possess net negative electrostatic charge by virtue of ionized phosphoryl and carboxylate substituents on outer cell envelope macromolecules which are exposed t...
journal_title:Journal of microbiological methods
pub_type: 杂志文章,评审
doi:10.1016/s0167-7012(00)00224-4
更新日期:2001-01-01 00:00:00
abstract::Any forms of valorization of microorganisms would require accurate identity recognition to ensure repeatability, reproducibility and quality assurance. This study aimed to evaluate the effectiveness of different primers for identifying cultured eukaryotic microalgae using a simple 18S rDNA approach. A total of 34 isol...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2020.105890
更新日期:2020-05-01 00:00:00
abstract::A simple methodology based in a modified mosquito cage with a Petri dish containing culture medium was successfully used as an alternative method to the traditional digestive tract dissection protocol to collect bacteria from the feces of the mosquito Anopheles darlingi. ...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2017.08.004
更新日期:2017-10-01 00:00:00
abstract::A discontinuous lactate dehydrogenase coupled assay is described for the evaluation of the pyruvate carboxylase activity (Pc, EC 6.4.1.1) in a glutamate overproducing strain of Corynebacterium glutamicum. After an initial permeabilisation period of the cells, the method consisted of the fluorometric determination of t...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/s0167-7012(99)00104-9
更新日期:1999-12-01 00:00:00
abstract::This article presents an experimental design for measuring the mRNA expression in Salmonella enterica of the mntH gene in phagosome-mimicking conditions. The expression of mntH was quantified by real-time reverse transcription PCR for different S. enterica strains of porcine origin under different biological growth co...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2005.11.003
更新日期:2006-07-01 00:00:00
abstract::To prevent postoperative infectious complications, a urinary tract infection should be either diagnostically excluded or treated prior to ureterorenoscopy (URS). URS is a frequently performed endoscopic surgery for urological stone removal. Although the urinary dipstick test represents a simple and cost-effective meth...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2020.105933
更新日期:2020-06-01 00:00:00
abstract::In this study extruded bean was used as a nitrogen source substitute in culture medium formulation. A 3-factor simplex-lattice mixture design was used to establish better growth conditions. Completely substituted medium resulted in 43% of increase in the growth of Saccharomyces cerevisiae. Mixtures containing 1% extru...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2013.01.002
更新日期:2013-03-01 00:00:00
abstract::This paper describes a method that facilitates the extraction of PCR-compatible DNA from different activated sludge samples. The approach involves a novel preprocessing step in DNA extraction, which removes potential PCR inhibitors. The sludge was washed with different ratios of acetone and petroleum ether after pretr...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/s0167-7012(02)00185-9
更新日期:2003-03-01 00:00:00
abstract::Culture-independent molecular techniques and advances in next generation sequencing (NGS) technologies make large-scale epidemiological studies on microbiota feasible. A challenge using NGS is to obtain high reproducibility and repeatability, which is mostly attained through robust amplification. We aimed to assess th...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2018.03.003
更新日期:2018-04-01 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::Although recent technological advances in DNA sequencing and computational biology now allow scientists to compare entire microbial genomes, comparisons of closely related bacterial species and individual isolates by whole-genome sequencing approaches remains prohibitively expensive for most laboratories. Here we repo...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2005.12.006
更新日期:2006-08-01 00:00:00
abstract::Two novel modifications of continuous culture with gradual change of dilution rate (A-stat): D-stat and auxo-accelerostat were evaluated in the studies of the effect of changing individual environmental parameters (T, pH, pO(2), substrate concentration, etc.) on growth characteristics of different microorganisms. Comm...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/s0167-7012(03)00143-x
更新日期:2003-10-01 00:00:00
abstract::Interest in using Bacillus strains as probiotic components of animal feeds has grown in recent years. However, some of these strains, especially those taxonomically related to the Bacillus cereus group, may have enterotoxigenic activity. Assessment of their toxigenic potential by well-established and robust protocols ...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2014.05.019
更新日期:2014-08-01 00:00:00
abstract::Denaturing gradient gel electrophoresis (DGGE) of PCR-amplified ribosomal RNA gene amplicons was used to study the stool microbiota of hospitalized patients and to examine the effect of antibiotic therapy. For one patient, 16 anaerobic species identified by random cloning and sequencing of PCR-amplified rRNA genes fro...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/s0167-7012(03)00059-9
更新日期:2003-08-01 00:00:00
abstract::The reproducibility and reliability of quantitative microbiological assessments using the DNA-DNA hybridization "checkerboard method" (CKB) were assessed. The data originated from 180 chronic periodontitis patients, who were enrolled in a clinical trial and sampled at baseline, and 3 and 12m post-therapy. The samples ...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2015.01.010
更新日期:2015-03-01 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
abstract::Attachment of Shiga toxigenic Escherichia coli (STEC) to surfaces and the formation of biofilms may enhance persistence in a food processing environment and present a risk of contaminating products. Seven strains of STEC and three non-STEC strains were selected to compare two biofilm quantification methods; epifluores...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2006.11.014
更新日期:2007-04-01 00:00:00
abstract::Brucella is a Gram-negative facultative bacterium that persists intracellularly in macrophages. However, the intracellular survival mechanisms used by Brucella are not fully understood. Isolation of Brucella RNA from infected macrophages has been challenging, and the inability to isolate sufficient Brucella RNA from i...
journal_title:Journal of microbiological methods
pub_type: 杂志文章
doi:10.1016/j.mimet.2004.10.018
更新日期:2005-03-01 00:00:00