Abstract：
:Two rapid in situ enumeration methods using fluorescent probes were used to assess the physiological activities of Klebsiella pneumoniae biofilms on stainless steel. Fluorescent dyes, 5-cyano-2,3-ditolyl tetrazolium chloride (CTC) and rhodamine 123 (Rh 123), were chosen to perform this study. CTC is a soluble redox indicator which can be reduced by respiring bacteria to fluorescent CTC-formazan crystals. Rh 123 is incorporated into bacteria with respect to cellular proton motive force. The intracellular accumulation of these fluorescent dyes can be determined using epifluorescence microscopy. The results obtained with these two fluorescent probes in situ were compared to the plate count (PC) and in situ direct viable count (DVC) methods. Viable cell densities within biofilms determined by the three in situ methods were comparable and always showed approximately 2-fold higher values than those obtained with the PC method. As an additional advantage, the results were observed after 2 h, which was shorter than the 4 h incubation time required for the DVC method and 24 h for colony formation. The results indicate that staining with CTC and Rh 123 provides rapid information regarding cell numbers and physiological activities of bacteria within biofilms.
journal_name
J Microbiol Methodsjournal_title
Journal of microbiological methodsauthors
Yu FP,McFeters GAdoi
10.1016/0167-7012(94)90058-2subject
Has Abstractpub_date
1994-01-01 00:00:00pages
1-10eissn
0167-7012issn
1872-8359pii
0167-7012(94)90058-2journal_volume
20pub_type
杂志文章abstract：:Much of our knowledge concerned with microbial cells is based on population-based analysis of cultures, which give useful insights into average responses but neither on individual cells nor subpopulations. In this work we demonstrate how to access and utilise large amounts of valuable information concerned with cell p...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2009.01.011
更新日期：2009-04-01 00:00:00
abstract：:In order to study functional gene expression in Streptomyces coelicolor, a mini-transposon encoding the apramycin resistance gene aac(3)IV within its inverted repeat (IR) boundaries was constructed based on IS204, which was previously identified in the genome of Nocardia asteroides YP21. The mini-transposon and IS204 ...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2011.10.018
更新日期：2012-01-01 00:00:00
abstract：:A simple, fast and cost-effective method for the taxon-specific separation of various 16S rRNAs was developed. This primer extension mediated separation of different RNA species was obtained on agarose gels. The method provides an easy way for the investigation of substrate mediated radioisotope incorporation into the...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2009.07.010
更新日期：2009-10-01 00:00:00
abstract：:Laser desorption-time of flight (LD-TOF) mass spectrometry-based detection of hemozoin was assessed for its performance characteristics as a rapid screening test for malaria. In spite of good specificity of >95%, poor sensitivity of 80.2% for microscopically positive samples makes the easy-to-apply and rapid approach ...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2019.04.002
更新日期：2019-05-01 00:00:00
abstract：:A new method is described for the rapid real-time screening of antioxidative properties using a recombinant Escherichia coli DPD2511 biosensor. This microplate technique, without time-consuming pre-incubations and handling, has potential for a high-throughput search of bioactive compounds. Special emphasis was given t...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2015.08.018
更新日期：2015-11-01 00:00:00
abstract：:Recent changes in Brazilian legislation for commercial disinfectants have been published due to the recent epidemic of nosocomial infections caused by rapidly growing mycobacteria (RGM) in many states of Brazil over the last 8years. One of these documents requires that all the manufacturers provide evidence of efficac...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2011.12.004
更新日期：2012-02-01 00:00:00
abstract：:Targeted mutagenesis is one of the major tools for determining the function of a given gene and its involvement in bacterial pathogenesis. In mycobacteria, gene deletion is often accomplished by using allelic exchange techniques that commonly utilise a suicide delivery vector. We have adapted a widely-used suicide del...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2010.07.014
更新日期：2010-10-01 00:00:00
abstract：:In Europe, alternative methods for the detection of food-borne pathogens can be used instead of the standard ISO/CEN reference protocol, if validated according to the protocol outlined in ISO 16140, 2003. In this study, the performance of two novel methods for the detection of Salmonella sp. using real-time PCR techno...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2010.10.004
更新日期：2011-01-01 00:00:00
abstract：:Antibiotic treatments can lead to a disruption of the human microbiota. In this in-vitro study, the impact of antibiotics on adult intestinal microbiota was monitored in a new high-throughput approach: a fermentation screening-platform was coupled with a phylogenetic microarray analysis (Intestinal-chip). Fecal inocul...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2012.12.011
更新日期：2013-03-01 00:00:00
abstract：:Characterization of commercial microbial consortia products for human and environmental health risk assessment is a major challenge for regulatory agencies. As a means to develop an approach to assess the potential environmental risk of these products, research was conducted to compare four genomics methods for charac...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2014.11.013
更新日期：2015-01-01 00:00:00
abstract：:A yeast transcriptional activator, Gcn4p, induces the expression of genes that are involved in amino acid and purine biosynthetic pathways under amino acid starvation. Gcn4p has an acidic activation domain in the central region and a bZIP domain in the C-terminus that is divided into the DNA-binding motif and dimeriza...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2007.02.010
更新日期：2007-06-01 00:00:00
abstract：:The immunoglobulin degrading enzyme of Streptococcus pyogenes, IdeS, is an unusual cysteine protease produced by group A streptococci for which the only known substrate is immunoglobulin G (IgG). To date, IdeS has not been found to cleave any of the known synthetic substrates that other cysteine proteases hydrolyse, t...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2007.04.017
更新日期：2007-08-01 00:00:00
abstract：:Thermophilic strains of Geobacillus, Anoxybacillus and Bacillus that are able to grow at 55 degrees C and above are recognized as commonly occurring contaminants during the production of milk powders. In particular, Anoxybacillus flavithermus strain C and Bacillus licheniformis strain F are often the most prevalent. W...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2004.09.008
更新日期：2005-02-01 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
abstract：:Bacteriophages have a potential in biofilm control. The aim of the study was to develop a method for selection of the most effective Pseudomonas aeruginosa phages for inhibition of biofilm formation and its eradication. The microtiter plate method is based on crystal violet staining and measuring of optical density. ...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2008.03.005
更新日期：2008-08-01 00:00:00
abstract：UNLABELLED:An important goal for the improved diagnosis and management of infectious and inflammatory diseases, such as periodontitis, is the development of rapid and accurate technologies for the decentralized detection of bacterial pathogens. The aim of this prospective multicenter study was to evaluate the clinical ...
journal_title：Journal of microbiological methods
pub_type： 杂志文章,多中心研究
doi：10.1016/j.mimet.2015.07.002
更新日期：2015-10-01 00:00:00
abstract：:Bacterial polyhydroxyalkanoate (PHA) is an attractive biopolyester for medical applications due to its biocompatibility. However, inappropriate extraction of PHA from bacterial biomass results in contamination by pyrogenic compounds (e.g. lipopolysaccharides) and thus influences medical testing. This problem was solve...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2007.01.002
更新日期：2007-04-01 00:00:00
abstract：:An acute hepatopancreatic necrosis disease (AHPND) causes serious losses to the global shrimp industry. The etiologic agent of AHPND is Vibrio spp. carrying a large plasmid which encodes a binary toxin, PirAB. Currently, AHPND is diagnosed by PCR based methods that detect the presences of both pirA and pirB genes. How...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2020.106002
更新日期：2020-09-01 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：:Recently we showed the applicability and sensitivity of the RNA-based sandwich hybridisation assay (SHA) for detection of gram-negative cells in environmental samples [Leskelä, T., Tilsala-Timisjärvi, A., Kusnetsov, J., Neubauer, P., Breitenstein, A., 2005. Sensitive genus-specific detection of Legionella by a 16S rRN...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2006.10.009
更新日期：2007-03-01 00:00:00
abstract：:A simplified amplified-fragment length polymorphism (AFLP) method was developed and applied to genotype 52 Mycobacterium tuberculosis isolates. This method can be carried out using only one restriction enzyme (XhoI), one double strand adapter, and one PCR primer. The amounts of DNA and DNA polymerase, and the concentr...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2009.07.007
更新日期：2009-09-01 00:00:00
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...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2016.11.005
更新日期：2017-01-01 00:00:00
abstract：:Biotransformation of natural products to the natural flavoring, gamma-decalactone (GDL), has attracted considerable attention. However, improving its yield is challenging due to its high feedback inhibition of yeast cells, which lowers the productivity of the biotransformation process. In this study, we compared two i...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2020.106041
更新日期：2020-09-03 00:00:00
abstract：:Paper-based nucleic acid testing techniques are increasingly in demand. Hence, we have developed a simple and cheap paper fluidic device to detect multiple gene targets in Leptospira. Fluidic channels of the penta-clover device are drawn using a correction pen on Whatman filter paper 1. The fluid blocks the pores of t...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2020.105962
更新日期：2020-07-01 00:00:00
abstract：:Rapid pathogen identification (ID) and antimicrobial susceptibility testing (AST) in bacteremia cases or sepsis could improve patient prognosis. Thus, it is important to provide timely reports, which make it possible for clinicians to set up appropriate antibiotic therapy during the early stages of bloodstream infecti...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2018.01.012
更新日期：2018-03-01 00:00:00
abstract：:Terminal Restriction Fragment (TRF) pattern analysis has become a widely used and informative tool for studying microbial communities. Variation between sequence-determined or true TRF length and observed TRF length (TRF drift) has been previously reported and can significantly affect identification of bacterial speci...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/s0167-7012(03)00003-4
更新日期：2003-07-01 00:00:00
abstract：:The U.S. Environmental Protection Agency's (EPA) Water Laboratory Alliance (WLA) currently uses ultrafiltration (UF) for concentration of biosafety level 3 (BSL-3) agents from large volumes (up to 100-L) of drinking water prior to analysis. Most UF procedures require comprehensive training and practice to achieve and ...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2015.08.013
更新日期：2015-11-01 00:00:00
abstract：:The purpose of this study was to explore the potential of using cationic polyethylenimine (PEI) to deliver green fluorescent protein (GFP) to protozoan parasite Toxoplasma gondii. PEI/DNA polyplexes were formed using branched PEI and pEGFP-N1 plasmid with various N/P ratios that ranged from 5 to 50. With the increment...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2012.08.001
更新日期：2012-10-01 00:00:00
abstract：:Neisseria gonorrhoeae (NG) has developed resistance to most antibiotics, making it increasingly difficult to treat. Previous studies have predicted antimicrobial NG susceptibility based on the antimicrobial gene target DNA gyrase subunit A (gyrA) codon serine 91 and the penicillin-binding protein 2 (penA) using Roche ...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2019.105783
更新日期：2020-01-01 00:00:00
abstract：:A method to extract mold spores from porous ceiling tiles was developed using a masticator blender. Ceiling tiles were inoculated and analyzed using four species of mold. Statistical analysis comparing results obtained by masticator extraction and the swab method was performed. The masticator method was demonstrated a...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2004.12.013
更新日期：2005-06-01 00:00:00
