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Microorganisms, Volume 9, Issue 2

February 2021 - 260 articles

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Cover Story: Streptococcus suis, an emerging zoonotic pathogen, is a common coloniser of the respiratory tract of pigs. It can cause invasive disease with symptoms such as pneumonia, arthritis, meningitis, endocarditis and acute sepsis. Cyclooxygenase-2 (COX-2) and its metabolites play an important regulatory role in different biological processes of the host, such as inflammation and immune activation. Induction of COX-2 and the production of its metabolite prostaglandin E2 (PGE2) were demonstrated in a porcine precision-cut lung slice model infected with S. suis. The time-dependent induction of COX-2 in the infected tissue, with a strong signal mainly in bronchial fibroblasts, resulted in increased PGE2 levels. Furthermore, the pore-forming toxin suilysin played an important role in this process. View this paper

Articles (260)

  • Article
  • Open Access
23 Citations
8,048 Views
15 Pages

The Autotrophic Core: An Ancient Network of 404 Reactions Converts H2, CO2, and NH3 into Amino Acids, Bases, and Cofactors

  • Jessica L. E. Wimmer,
  • Andrey do Nascimento Vieira,
  • Joana C. Xavier,
  • Karl Kleinermanns,
  • William F. Martin and
  • Martina Preiner

The metabolism of cells contains evidence reflecting the process by which they arose. Here, we have identified the ancient core of autotrophic metabolism encompassing 404 reactions that comprise the reaction network from H2, CO2, and ammonia (NH3) to...

  • Article
  • Open Access
8 Citations
2,940 Views
13 Pages

A Mucoralean White Collar-1 Photoreceptor Controls Virulence by Regulating an Intricate Gene Network during Host Interactions

  • Carlos Pérez-Arques,
  • María Isabel Navarro-Mendoza,
  • Laura Murcia,
  • Carlos Lax,
  • Marta Sanchis,
  • Javier Capilla,
  • Eusebio Navarro,
  • Victoriano Garre and
  • Francisco Esteban Nicolás

Mucolares are an ancient group of fungi encompassing the causal agents for the lethal infection mucormycosis. The high lethality rates, the emerging character of this disease, and the broad antifungal resistance of its causal agents are mucormycosis...

  • Article
  • Open Access
19 Citations
6,396 Views
12 Pages

Shift from Carbon Flow through the Microbial Loop to the Viral Shunt in Coastal Antarctic Waters during Austral Summer

  • Claire Evans,
  • Joost Brandsma,
  • Michael P. Meredith,
  • David N. Thomas,
  • Hugh J. Venables,
  • David W. Pond and
  • Corina P. D. Brussaard

The relative flow of carbon through the viral shunt and the microbial loop is a pivotal factor controlling the contribution of secondary production to the food web and to rates of nutrient remineralization and respiration. The current study examines...

  • Article
  • Open Access
2 Citations
2,955 Views
13 Pages

We previously developed a transmission dynamic model of Neisseria meningitidis serogroup A (NmA) with the aim of forecasting the relative benefits of different immunisation strategies with MenAfriVac. Our findings suggested that the most effective st...

  • Article
  • Open Access
8 Citations
2,880 Views
15 Pages

The novel extreme obligate alkaliphilic Bacillus marmarensis DSM 21297 is known to produce polyhydroxybutyrate (PHB). However, the detailed mechanism of PHB synthesis in B. marmarensis is still unknown. Here, we investigated which metabolic pathways...

  • Article
  • Open Access
11 Citations
4,377 Views
19 Pages

Direct and Indirect Effects of Management Intensity and Environmental Factors on the Functional Diversity of Lichens in Central European Forests

  • Steffen Boch,
  • Hugo Saiz,
  • Eric Allan,
  • Peter Schall,
  • Daniel Prati,
  • Ernst-Detlef Schulze,
  • Dominik Hessenmöller,
  • Laurens B. Sparrius and
  • Markus Fischer

Using 642 forest plots from three regions in Germany, we analyzed the direct and indirect effects of forest management intensity and of environmental variables on lichen functional diversity (FDis). Environmental stand variables were affected by mana...

  • Review
  • Open Access
18 Citations
7,222 Views
16 Pages

The stinkbugs of the infraorder Pentatomomorpha are a group of important plant sap-feeding insects, which host diverse microorganisms. Some are located in their complex morphological midgut compartments, while some within the specialized bacteriomes...

  • Article
  • Open Access
8 Citations
3,780 Views
16 Pages

In Vitro Anti-Biofilm and Antibacterial Properties of Streptococcus downii sp. nov.

  • Maigualida Cuenca,
  • María Carmen Sánchez,
  • Pedro Diz,
  • Lucía Martínez-Lamas,
  • Maximiliano Álvarez,
  • Jacobo Limeres,
  • Mariano Sanz and
  • David Herrera

The aim of this study was to evaluate the potential anti-biofilm and antibacterial activities of Streptococcus downii sp. nov. To test anti-biofilm properties, Streptococcus mutans, Actinomyces naeslundii, Veillonella parvula, Fusobacterium nucleatum...

  • Review
  • Open Access
47 Citations
7,107 Views
26 Pages

The Shigella Type III Secretion System: An Overview from Top to Bottom

  • Meenakumari Muthuramalingam,
  • Sean K. Whittier,
  • Wendy L. Picking and
  • William D. Picking

Shigella comprises four species of human-restricted pathogens causing bacillary dysentery. While Shigella possesses multiple genetic loci contributing to virulence, a type III secretion system (T3SS) is its primary virulence factor. The Shigella T3SS...

  • Article
  • Open Access
29 Citations
3,859 Views
12 Pages

Supernatants of Bifidobacterium longum and Lactobacillus plantarum Strains Exhibited Antioxidative Effects on A7R5 Cells

  • Yusheng Wang,
  • Zhifeng Fang,
  • Qixiao Zhai,
  • Shumao Cui,
  • Jianxin Zhao,
  • Hao Zhang,
  • Wei Chen and
  • Wenwei Lu

Vascular reactive oxygen species (ROS) play an essential role in cardiovascular diseases and the antioxidative effects of probiotics have been widely reported. To screen the probiotic strains that may prevent cardiovascular diseases, we tested the an...

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