Biofilms Formation

A biofilm is a community of bacteria that attach to a surface by excreting a sticky, sugary substance that encompasses the bacteria in a matrix. It is composed of a single species or a conglomerate of species. In many cases, biofilms are only bacteria, but they can also include other living things such as fungi and algae, creating a microbial stew of sorts. It is also considered a hydrogel, which is a complex polymer that contains many times its dry weight in water. The biofilm bacteria can share nutrients and are sheltered from harmful factors in the environment, such as desiccation, antibiotics, and a host body’s immune system. A biofilm usually begins to form when a free-swimming bacterium attaches to a surface.

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