Results 91 to 100 of about 48,037 (263)

Flagellin induces β-defensin 2 in human colonic ex vivo infection with enterohemorrhagic Escherichia coli [PDF]

, 2016
Enterohemorrhagic E. coli (EHEC) is an important foodborne pathogen in the developed world and can cause life-threatening disease particularly in children.
Chan, Simon, Cook, Vivienne, Ellis, Samuel, Gelson, William, Lewis, Steven, Prior, Alison, Schuller, Stephanie   +6 more
core   +1 more source

Description of a new species of Haemogamasus (Mesostigmata, Laelapidae, Haemogamasinae) from Chubut, Río Negro and Neuquén Provinces, Argentina [PDF]

, 2012
A new species of Haemogamasus mites is described from Chubut, Neuquén and Río Negro Provinces, Argentina. It was collected primarily from rodents of the genus Abrothrix (65 of 77 collections): Abrothrix longipilis (63), Abrothrix o.
Herrin, C. Selby, Sage, Richard
core   +2 more sources

Scorzonera sensu lato (Asteraceae, Cichorieae) – taxonomic reassessment in the light of new molecular phylogenetic and carpological analyses [PDF]

, 2020
Scorzonera comprises 180–190 species and belongs to the subtribe Scorzonerinae. Its circumscription has long been the subject of debate and available molecular phylogenetic analyses affirmed the polyphyly of Scorzonera in its wide sense.
Jones, Katy, Kilian, Norbert, Krinitsina, Anastasiya A., Nilova, Maya V., Speranskaya, Anna S., Sukhorukov, Alexander P., Zaika, Maxim A.   +6 more
core   +3 more sources

The Keystone‐Pathogen Hypothesis Updated: The Role of Porphyromonas gingivalis in Periodontitis

Journal of Periodontal Research, EarlyView.
Porphyromonas gingivalis orchestrates a coordinated manipulation of immune and inflammatory responses in periodontal tissues which leads to the generation of a dysbiotic, subgingival biofilm community, and progression of periodontitis. The type 9 secretion system, lipid A modification, and the formation of outer membrane vesicles are important ...
Mike A. Curtis, James A. Garnett, Richard P. Darveau   +2 more
wiley   +1 more source

IscR Regulation of Type 3 Fimbriae Expression in Klebsiella pneumoniae CG43

Frontiers in Microbiology, 2017
In Klebsiella pneumoniae, we have previously shown that IscR, an Fe–S cluster-containing transcriptional factor, plays a dual role in controlling capsular polysaccharide biosynthesis and iron-acquisition systems by switching between its holo and apo ...
Tien-Huang Lin, Tien-Huang Lin, Cheng-Yin Tseng, Cheng-Yin Tseng, Yi-Chyi Lai, Chien-Chen Wu, Chun-Fa Huang, Chun-Fa Huang, Ching-Ting Lin, Ching-Ting Lin   +9 more
doaj   +1 more source

Modeling fimbriae mediated parasite–host interactions

Journal of Theoretical Biology, 2010
Type 1 fimbriae are a known virulence factor in a number of pathogenic enterobacteriaceae, including Salmonella, Shigella and E. coli. Yet, they are also expressed by some commensal strains, notably of E. coli. One hypothesis of the role of fimbriae in commensals is that they evoke a small but tolerable host immune response in order to have the host ...
Chu, Dominique, Barnes, David J.
openaire   +2 more sources

Helical structure of Bordetella pertussis fimbriae [PDF]

Journal of Bacteriology, 1986
The helical structures of Bordetella pertussis fimbriae of serotypes 2 and 6 were determined by optical diffraction analysis of electron micrographs of negatively stained paracrystalline bundles of purified fimbriae. The fimbrial structure is based on an axial repeat of 13 nm that contains five repeating units in two complete turns of a single-start ...
A C, Steven, M E, Bisher, B L, Trus, D, Thomas, J M, Zhang, J L, Cowell   +5 more
openaire   +2 more sources

Chaperone-Usher Fimbriae of Escherichia coli

PLoS ONE, 2013
Chaperone-usher (CU) fimbriae are adhesive surface organelles common to many Gram-negative bacteria. Escherichia coli genomes contain a large variety of characterised and putative CU fimbrial operons, however, the classification and annotation of ...
Daniël J. Wurpel, S. Beatson, Makrina Totsika, Nicola K. Petty, M. Schembri   +4 more
semanticscholar   +1 more source

Random Mutagenesis in Porphyromonas gingivalis Enables Isolation of Mutants With Enhanced Secreted Protease Activity

Molecular Oral Microbiology, EarlyView.
ABSTRACT Porphyromonas gingivalis is a key pathogen in periodontitis, with secreted proteases as major virulence factors. We developed a screening method to generate and identify P. gingivalis mutants with elevated protease activity. Mutations were induced using the mutagens 2,6‐diaminopurine (2,6‐DAP) or ethyl methanesulfonate (EMS), and the ...
Takeru Nakabayashi, Satoshi Yuhara, Kosei Tanaka   +2 more
wiley   +1 more source

A novel approach for detecting Salmonella enterica strains frequently attributed to human illness—development and validation of the highly pathogenic Salmonella (HPS) multiplex PCR assay

Frontiers in Microbiology
IntroductionNon-typhoidal Salmonella enterica (NTS) are leading bacterial agents of foodborne illnesses and a global concern for human health. While there are over 2,600 different serovars of NTS, epidemiological data suggests that certain serovars are ...
Dayna M. Harhay, Kerry D. Brader, Tatum S. Katz, Gregory P. Harhay, James L. Bono, Joseph M. Bosilevac, Tommy L. Wheeler   +6 more
doaj   +1 more source