What does Pseudomonas aeruginosa do in response to quorum sensing?
Pseudomonas aeruginosa is an opportunistic pathogen of humans that uses a process called quorum sensing (QS) to regulate gene transcription in response to cell density (1, 2).
What does Pseudomonas aeruginosa have to do with the ear?
Pseudomonas aeruginosa commonly causes low-grade infections of the external auditory canal. If these infections are inadequately treated, they can progress into a severe form of external otitis called malignant external otitis (MEO).
How can quorum sensing be used to fight infection disease?
Quorum sensing is thought to afford pathogenic bacteria a mechanism to minimize host immune responses by delaying the production of tissue-damaging virulence factors until sufficient bacteria have amassed and are prepared to overwhelm host defense mechanisms and establish infection.
How do you get rid of Pseudomonas in your ear?
Most minor Pseudomonas infections resolve either without treatment or after minimal treatment. If symptoms are mild or nonexistent, it is not necessary to treat the infection. In the case of swimmer’s ear, rinsing the ear with vinegar can help. A doctor may also prescribe an antibiotic called polymyxin.
What causes Pseudomonas ear infection?
Pseudomonas infections are caused by a free-living bacterium from the genus Pseudomonas. They favor moist areas and are widely found in soil and water. Only a few of the many species cause disease. The most common species that causes infection is called Pseudomonas aeruginosa .
What types of bacteria use quorum sensing?
Gram-positive and Gram-negative bacteria use quorum sensing communication circuits to regulate a diverse array of physiological activities. These processes include symbiosis, virulence, competence, conjugation, antibiotic production, motility, sporulation, and biofilm formation.
Why do bacteria use quorum sensing?
Bacteria use quorum sensing to regulate certain phenotype expressions, which in turn, coordinate their behaviours. Some common phenotypes include biofilm formation, virulence factor expression, and motility. Certain bacteria are able to use quorum sensing to regulate bioluminescence, nitrogen fixation and sporulation.
Is quorum sensing specific to bacteria?
Quorum sensing (QS) is a communication mechanism between bacteria that allows specific processes to be controlled, such as biofilm formation, virulence factor expression, production of secondary metabolites and stress adaptation mechanisms such as bacterial competition systems including secretion systems (SS).
