Quorum sensing

Quorum sensing is the regulation of gene expression in response to fluctuations in cell-population density. Quorum sensing bacteria produce and release chemical signal molecules called autoinducers that increase in concentration as a function of cell density. The term Single Cell Protein (SCP) refers to the dried microbial cells or total protein extracted from pure microbial cell culture (Algae, bacteria, filamentous fungi, yeasts), which can be used as a food supplement to humans (Food Grade) or animals (Feed grade). Probiotics may seem new to the food and supplement industry, but they have been with us from our first breath. Probiotics serve as a source of functional and medical food.

Scope and Importance: The discovery that bacteria are able to communicate with each other changed our general perception of many single, simple organisms inhabiting our world. Instead of language, bacteria use signalling molecules which are released into the environment. As well as releasing the signalling molecules, bacteria are also able to measure the number (concentration) of the molecules within a population. Nowadays we use the term 'Quorum Sensing' (QS) to describe the phenomenon whereby the accumulation of signalling molecules enable a single cell to sense the number of bacteria (cell density). In the natural environment, there are many different bacteria living together which use various classes of signalling molecules. As they employ different languages they cannot necessarily talk to all other bacteria. Today, several quorum sensing systems are intensively studied in various organisms such as marine bacteria and several pathogenic bacteria.

  • Quorum sensing in Bacteria
  • Quorum sensing in Archaea
  • Quorum sensing in Plants
  • Quorum sensing in Biofilms
  • Quorum sensing in eukaryotes
  • Cell signalling and Quorum sensing
  • Collective behavior
  • Inter-species quorum sensing
  • Microbial intelligence and Swarm intelligence
  • Quorum quenching
  • Molecular pathways of Quorum Sensing
  • Alternative mode of bacterial quorum sensing
  • Bacterial reign in pathogenic origins
  • Computational models or algorithms
  • Chemical coating effects in Quorum Sensing of bacteria
  • Immune responses to against viruses
  • Tumour necrosis factor alpha (TNF-?) role in hair follicles regenerative
  • Engineered bacterium to enhance products for medical applications
  • Unique properties of Honey & Garlic to fight against infections

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