Abstract：
:We performed a comparison of four selected protocols from the literature using microtitre-plate and colorimetric biomass assay for evaluation of enterococci biofilm formation ability and optimized a protocol after the identification and stringent performance of biofilm formation steps. The optimized protocol uses a dynamic model that provided a greater discrimination of enterococci biofilm formation ability, and could better simulate in vivo real conditions. Moreover different biofilm quantification approaches, such as the colorimetric biomass (crystal violet), the resazurin and CFU's assays could be used with the optimized protocol, with adequate reproducibility. This study also recognizes that parameters such as the biofilm formation index (BFi), the cut-off values and the Z' factor provide greater accuracy, possibility of inter and intra laboratory comparison and quality evaluation of the biofilm screening assays, respectively.
journal_name
J Microbiol Methodsjournal_title
Journal of microbiological methodsauthors
Extremina CI,Costa L,Aguiar AI,Peixe L,Fonseca APdoi
10.1016/j.mimet.2010.11.007subject
Has Abstractpub_date
2011-02-01 00:00:00pages
167-73issue
2eissn
0167-7012issn
1872-8359pii
S0167-7012(10)00386-6journal_volume
84pub_type
杂志文章abstract：:Chemotactic behaviour is an important part of the lifestyle of motile bacteria and enables cells to respond to various environmental stimuli. The Hard Agar Plug (HAP) method is used to study the chemotactic behaviour of bacteria, including the fastidious microaerophile Campylobacter jejuni, an intestinal pathogen of h...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2018.02.008
更新日期：2018-03-01 00:00:00
abstract：:Watermelon peel waste (WPW) is a zero value material containing a high amount of nutrients that could be utilized in microbial growth medium production. In the present work, WPW was used to produce universal fungal growth medium with great nutritional profile to use instead of other expensive media particularly the Po...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2019.105802
更新日期：2020-01-01 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：: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：:Preservation of strains is important to further studies and characterization; we have shown a technique of long-term preservation of Neisseria spp. and Haemophilus spp. by freezing cotton tip swabs impregnated with fastidious organisms at -80 °C without the addition of cryoprotectants. ...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2020.105969
更新日期：2020-08-01 00:00:00
abstract：:Chlamydophila pneumoniae (C. pneumoniae) has been detected in macrophages (Mø) and dendritic cells (DC) in vascular diseases. To understand the importance of these cell types in C. pneumoniae infection and transmission, we infected DC and cultivated them with Mø in a coculture model system which precludes cell-to-cell...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2007.12.010
更新日期：2008-03-01 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：:Bacterial identification methods used in routine identification of pathogens in medical microbiology include a combination approach of biochemical tests, mass spectrometry or molecular biology techniques. Extensive publicly-available databases of DNA sequence data from pathogenic bacteria have been amassed in recent y...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2019.03.016
更新日期：2019-05-01 00:00:00
abstract：:A real-time quantitative polymerase chain reaction (Q-PCR) assay was developed for detecting and quantifying Escherichia coli in water samples from agricultural watersheds. The assay included optimization of DNA extraction and purification from water samples, and Q-PCR amplification conditions using newly designed spe...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2007.02.016
更新日期：2007-06-01 00:00:00
abstract：:A novel method for the measurement of dissolved adenosine-5'-triphosphate and guanosine-5'-triphosphate (D-ATP and D-GTP, respectively) in marine and freshwater habitats was developed and applied to samples collected from the oligotrophic North Pacific Ocean. Both D-ATP and D-GTP are co-precipitated by authigenically ...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/s0167-7012(01)00301-3
更新日期：2001-11-01 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 strain-specific assay was developed for the detection of viable Lactobacillus on cattle feed. The DNA sequences of the 16S rRNA gene and four different 16S/23S rRNA intergenic spacer regions (ISR) from Lactobacillus sp. HOFG1 were determined. Based on these sequences, a strain-specific primer was designed for the am...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2004.12.002
更新日期：2005-05-01 00:00:00
abstract：:Fluorescence in situ hybridization has been used for the identification and analysis of populations of the dinoflagellate Symbiodinium that lives symbiotically in marine invertebrates. Conditions for in situ hybridization of Symbiodinium were optimized and used to identify the clade to which the isolate belongs using ...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/s0167-7012(02)00250-6
更新日期：2003-06-01 00:00:00
abstract：:Brucella melitensis and Brucella abortus account for almost all cases of brucellosis in Turkish population. We developed a fourplex quantitative real-time PCR (qPCR) assay for the electrophoresis-free, rapid and cost-effective differentiation of B. abortus and B. melitensis from the other Brucella spp. The 4-plex spec...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2020.106125
更新日期：2021-01-01 00:00:00
abstract：:Development of a high-throughput eukaryotic screening procedure is important to increase success in obtaining improved enzymes through directed enzyme evolution. This procedure was developed for the yeast Yarrowia lipolytica which becomes the second eukaryotic host for this purpose. The extracellular lipase Lip2 was u...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2007.06.008
更新日期：2007-09-01 00:00:00
abstract：:Yersinia pestis is a Department of Health and Human Services select agent as defined in federal regulations. Certain attenuated strains of Y. pestis, such as the pgm(-) strain, are exempt from these regulations. Herein we describe a strategy to verify the absence of the pgm locus in Y. pestis strains being considered ...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2009.02.013
更新日期：2009-06-01 00:00:00
abstract：:Traditional antibiotic susceptibility testing methods take several days to confirm and start disease treatment. The lack of new antibiotics or drugs warrants a need for optimization of current diagnostic tools for immediate antibiotic susceptibility testing. We present a rapid screening method to evaluate the response...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2019.05.009
更新日期：2019-07-01 00:00:00
abstract：:Corynebacterium matruchotii is a microbial inhabitant in the oral cavity of humans and is associated with the formation of dental calculi. C. matruchotii forms highly specific morphological units, which are referred to as corn-cobs. Although other Corynebacterium species have frequently been isolated from the oral cav...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2014.06.005
更新日期：2014-09-01 00:00:00
abstract：:In this study an on-line electrochemical method was developed to examine the one-step growth cycle (OSGC) of the bacteriophage Bam35. The on-line conditions for monitoring the OSGC and the effect of aeration on the duration of the OSGC were defined. The data indicate that binding of phenyldicarbaundecaborane anions to...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2006.12.023
更新日期：2007-04-01 00:00:00
abstract：:This study evaluated the effect of skimmed milk as a cryoprotectant for the maintenance and long-term preservation of 70 Malassezia pachydermatis strains. An initial suspension of each strain was prepared in sterile distilled water with skimmed milk. The most effective method was cryopreservation that ensured 100% via...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2016.12.003
更新日期：2017-01-01 00:00:00
abstract：:Bacillus anthracis, the causative agent of the human disease anthrax, Bacillus cereus, a food-borne pathogen capable of causing human illness, and Bacillus thuringiensis, a well-characterized insecticidal toxin producer, all cluster together within a very tight clade (B. cereus group) phylogenetically and are indistin...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2003.11.004
更新日期：2004-03-01 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：: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 fluorescent redox dye 5-cyano-2,3-ditolyl tetrazolium chloride (CTC), combined with fluorescein-labeled antibodies, was tested for the simultaneous detection of the respiratory electron transport system (ETS) activity and enumeration of Giardia cysts and Cryptosporidium oocysts by spectral microfluorometry and epi...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/s0167-7012(01)00249-4
更新日期：2001-07-30 00:00:00
abstract：:Silver scurf caused by Helminthosporium solani causes significant economic losses in table stock, seed and processing potatoes. Specific polymerase chain reaction (PCR) primers, Hs1F1/Hs2R1, from H. solani were used for the amplification of a 447-bp product from 20 tissue samples and 54 single spore H. solani isolates...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/s0167-7012(00)00240-2
更新日期：2001-02-01 00:00:00
abstract：:Serology is commonly used for the diagnosis of acute Chlamydia pneumoniae infections and also for the diagnosis of complicated Chlamydia trachomatis infections. Furthermore, recent sero-epidemiological studies have linked C. pneumoniae infection with several diseases traditionally considered non-infectious. The object...
journal_title：Journal of microbiological methods
pub_type： 杂志文章,评审
doi：10.1016/s0167-7012(00)00209-8
更新日期：2000-11-01 00:00:00
abstract：:We monitored Chlamydia trachomatis growth in HeLa cells cultured with either DMEM or RPMI medium containing 10% FCS under 2% or 21% O2 conditions for 2 days. Bacterial numbers, host cell numbers, and fibrosis-related gene expression in the host cells were estimated by an inclusion forming unit assay, a cell counting a...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2018.09.007
更新日期：2018-10-01 00:00:00
abstract：:Molecular methods for bacterial pathogen identification are gaining increased importance in routine clinical diagnostic laboratories. Achieving reliable results using DNA based technologies is strongly dependent on pre-analytical processes including isolation of target cells and their DNA of high quality and purity. I...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2011.03.003
更新日期：2011-06-01 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：:The antifungal activity of 10 dehydroabietic acid derivatives with different configuration in A and B rings (cis/trans A/B junction) and different substituents and/or functionalities was evaluated in bioassays in vitro and in situ (pine wood blocks). The test compounds dissolved in acetone were assayed at several conc...
journal_title：Journal of microbiological methods
pub_type： 杂志文章
doi：10.1016/j.mimet.2007.06.001
更新日期：2007-09-01 00:00:00
