Bacteria communicate differently among themselves and between themselves and other microorganisms as well as with other biological systems. Collectively, microbial communications, whether chemical or electrical, are wrapped up in one expression, viz Quorum-sensing. Think of the amount of voltage a single bacterium will be able to produce to get the necessary attention it deserves. It takes a quorum of cells to pull the electrical signalling communication mechanism through.

Bacteria communicate with one another using chemical signal molecules. ... This process, termed quorum sensing, allows bacteria to monitor the environment for other bacteria and to alter behavior on a population-wide scale in response to changes in the number and/or species present in a community.

Hello

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https://www.cs.montana.edu/webworks/projects/stevesbook/contents/chapters/chapter001/section006/green/page002.htm

Hi,

Based on bacterial species it may differ. For example, gram positive bacteria have their own system for communicating together. I could suggest to categorized your search based on bacterial type.

Bacteria have elaborate chemical singnaing systems that enable them to communicate within and between species.

Communication among bacteria proceeds in more ways. Not only signaling molecules but also burst of electricity serve for communication (https://www.quantamagazine.org/bacteria-use-brainlike-bursts-of-electricity-to-communicate-20170905/), they can use bioluminescence (https://science.howstuffworks.com/life/cellular-microscopic/bacteria-communication.htm) for communication, too.

Best regards Vit

Bacteria communicate differently among themselves and between themselves and other microorganisms as well as with other biological systems. Collectively, microbial communications, whether chemical or electrical, are wrapped up in one expression, viz Quorum-sensing. Think of the amount of voltage a single bacterium will be able to produce to get the necessary attention it deserves. It takes a quorum of cells to pull the electrical signalling communication mechanism through.

Quorum-sensing regulation of density-dependent genes has been described for numerous bacterial species. Pathogen Bacillus anthracis produces the quorum-sensing signaling molecule autoinducer-2 (AI-2). AI-2 activity is greatest during the exponential phase of growth. If B. anthracis regulates gene expression by means of an AI molecule, as do other pathogens, cells might have the ability to suppress virulence gene expression until the total population reaches a threshold density. Suppression of virulence gene expression by quorum sensing could allow B. anthracis to evade immune detection until its population is at a density sufficiently high to overwhelm the host’s innate and adaptive defenses.

Reference

Jones M. B. and Blaser M.J. Detection of a luxS-Signaling Molecule in Bacillus anthracis. INFECTION AND IMMUNITY. 2003, 71(7): 3914–3919.