{"id":87591,"date":"2026-02-13T13:56:23","date_gmt":"2026-02-13T08:26:23","guid":{"rendered":"https:\/\/vajiramandravi.com\/current-affairs\/?p=87591"},"modified":"2026-02-13T14:50:12","modified_gmt":"2026-02-13T09:20:12","slug":"quorum-sensing","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/current-affairs\/quorum-sensing\/","title":{"rendered":"Quorum Sensing"},"content":{"rendered":"<h2><b>Quorum Sensing Latest News<\/b><\/h2>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">The phenomenon of bacterial communication, or \u201cquorum sensing\u201d could indeed be a game changer for medicine, by opening new avenues to develop anti-quorum sensing therapies instead of antibiotics.<\/span><\/p>\n<h2><b>About Quorum Sensing<\/b><\/h2>\n<ul>\n<li style=\"text-align: justify;\"><span style=\"font-weight: 400;\">It is a <\/span><b>mechanism <\/b><span style=\"font-weight: 400;\">by which<\/span><b> bacteria regulate gene expression in accordance with population density<\/b><span style=\"font-weight: 400;\"> through the<\/span><b> use of signal molecules.\u00a0<\/b><\/li>\n<li style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Quorum sensing <\/span><b>allows bacteria <\/b><span style=\"font-weight: 400;\">populations to<\/span><b> communicate and coordinate group behaviour<\/b><span style=\"font-weight: 400;\"> and <\/span><b>commonly is used by pathogen<\/b><span style=\"font-weight: 400;\">s (disease-causing organisms) <\/span><b>in disease and infection processes.\u00a0<\/b><\/li>\n<li style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Bacterial activity involving quorum sensing was first observed in the mid-1960s by Hungarian-born microbiologist Alexander Tomasz in his studies of the ability of Pneumococcus (later known as Streptococcus pneumoniae) to take up free DNA from its environment.<\/span><\/li>\n<li style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Standard <\/span><b>quorum-sensing pathways consist<\/b><span style=\"font-weight: 400;\"> of <\/span><b>bacteria populations, signal molecules, and behavioral genes.\u00a0<\/b><\/li>\n<li style=\"text-align: justify;\"><span style=\"font-weight: 400;\">The <\/span><b>signal molecules, known as autoinducers<\/b><span style=\"font-weight: 400;\">, are <\/span><b>secreted into the environmen<\/b><span style=\"font-weight: 400;\">t by bacteria and <\/span><b>gradually increase in concentration as the bacteria population grows.\u00a0<\/b><\/li>\n<li style=\"text-align: justify;\"><b>After reaching a certain concentration threshold<\/b><span style=\"font-weight: 400;\">, the molecules become <\/span><b>detectable to bacteria populations<\/b><span style=\"font-weight: 400;\">, which then a<\/span><b>ctivate corresponding response genes <\/b><span style=\"font-weight: 400;\">that <\/span><b>regulate various behaviours<\/b><span style=\"font-weight: 400;\">, such as virulence, horizontal gene transfer, biofilm formation, and competence (the ability to take up DNA).\u00a0<\/span><\/li>\n<li style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Since many of these processes are effective only at certain population sizes, quorum sensing is a<\/span><b> key behaviour-coordination mechanism in many microbes.<\/b><\/li>\n<li style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Although quorum sensing is common among bacteria, the<\/span><b> precise sensing system <\/b><span style=\"font-weight: 400;\">and <\/span><b>class of quorum-sensing compounds used may differ.\u00a0<\/b><\/li>\n<li style=\"text-align: justify;\"><span style=\"font-weight: 400;\">In addition, the <\/span><b>manner in which different types of bacteria apply quorum sensing varies <\/b><span style=\"font-weight: 400;\">greatly.\u00a0<\/span>\n<ul>\n<li style=\"text-align: justify;\"><b>For example, the bacterium Pseudomonas aeruginosa,<\/b><span style=\"font-weight: 400;\"> which can cause pneumonia and blood infections, <\/span><b>uses quorum sensing to regulate disease mechanisms.<\/b><\/li>\n<li style=\"text-align: justify;\"><b>In other organisms<\/b><span style=\"font-weight: 400;\">, quorum sensing is <\/span><b>used for symbiotic processes and cell growth;<\/b><span style=\"font-weight: 400;\"> an example is the nitrogen-fixation mechanism of the bacterium Rhizobium leguminosarum.<\/span><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><strong>Source: <a href=\"https:\/\/epaper.thehindu.com\/ccidist-ws\/th\/th_delhi\/issues\/170769\/OPS\/GN1FJ2J2D.1+GDHFJ43EG.1.html\" target=\"_blank\" rel=\"nofollow noopener\">TH<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Quorum Sensing is a mechanism by which bacteria regulate gene expression in accordance with population density through the use of signal molecules. Read more about Quorum Sensing, Meaning, Main Components, Latest News.<\/p>\n","protected":false},"author":23,"featured_media":87565,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[21,5378,22,23],"class_list":{"0":"post-87591","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-upsc-prelims-current-affairs","8":"tag-prelims-pointers","9":"tag-quorum-sensing","10":"tag-upsc-current-affairs","11":"tag-upsc-prelims-current-affairs","12":"no-featured-image-padding"},"acf":[],"_links":{"self":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/87591","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/users\/23"}],"replies":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/comments?post=87591"}],"version-history":[{"count":4,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/87591\/revisions"}],"predecessor-version":[{"id":87617,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/87591\/revisions\/87617"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media\/87565"}],"wp:attachment":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media?parent=87591"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/categories?post=87591"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/tags?post=87591"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}