What is bacterial aggregation?
Autoaggregation is macroscopically observed as the formation of bacterial clumps that settle at the bottom of culture tubes. In autoaggregation, bacteria of the same type, e.g. in pure culture, form these clumps.
Why do bacteria aggregate?
We found that entropic forces generated by polymers abundant at chronic infection sites can cause bacteria to aggregate by a mechanism known as “depletion aggregation.” This aggregation mechanism does not require biofilm formation functions, but it does cause bacteria to become much less susceptible to killing by …
When bacteria are rod like they are called?
A bacillus ( pl. bacilli), or bacilliform bacterium, is a rod-shaped bacterium or archaeon. Bacilli are found in many different taxonomic groups of bacteria. However, the name Bacillus, capitalized and italicized, refers to a specific genus of bacteria.
What is a colony on an agar plate?
In microbiology, a “colony” is a group of bacteria, fungi, and other microorganisms grown on a solid agar medium. The cells plated on this medium grow to form a mass, which can then be duplicated for further use in the lab.
What are biofilms in bacteria?
Bacterial biofilms are complex surface attached communities of bacteria held together by self-produced polymer matrixs mainly composed of polysaccharides, secreted proteins, and extracellular DNAs.
How are bacteria multilingual?
Bacteria need siblings in order to act in concert, mustering enough power to cause harm. A bacteria’s private language depends on a lock-and-key system in which a hormonelike molecule fits into a receptor in the bacterial cell. But bacteria can also talk to other species — are “multilingual,” said Bassler.
What diseases are caused by rod-shaped bacteria?
Anthrax is a serious infectious disease caused by gram-positive, rod-shaped bacteria known as Bacillus anthracis.