When confronted with an antibiotic, toxic substance, or other source of considerable stress, bacteria are able to activate a defense mechanism using cell-to-cell communication to 'warn' unaffected bacteria, which can then anticipate, shield themselves and spread the warning signal.
When confronted with an antibiotic, toxic substance, or other source of considerable stress, bacteria are able to activate a defense mechanism using cell-to-cell communication to 'warn' unaffected bacteria, which can then anticipate, shield themselves and spread the warning signal.
When they perceive a source of stress, bacteria spring into action, inducing changes in the expression of certain genes and their physiological properties to make them less vulnerable to the detected lethal substance. They also produce small 'alarmone' proteinson their surface in order to contact and activate random neighbouring bacteria. Unstressed bacteria can only change state in the presence of a sufficient amount of alarmones.
Researchers have discovered that a mutation in the cellulose making machinery of E. coli bacteria allows them to cause severe disease in people -- 'good' bacteria make cellulose and 'bad' bacteria ...
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