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Pus is an exudate, typically white-yellow, yellow, or yellow-brown, formed at the site of inflammation during infections, regardless of cause. [1] [2] An accumulation of pus in an enclosed tissue space is known as an abscess, whereas a visible collection of pus within or beneath the epidermis is known as a pustule, pimple or spot.
The final structure of the abscess is an abscess wall, or capsule, that is formed by the adjacent healthy cells in an attempt to keep the pus from infecting neighboring structures. However, such encapsulation tends to prevent immune cells from attacking bacteria in the pus, or from reaching the causative organism or foreign object. [26]
Additionally, the extracellular matrix and dense outer layer of bacterial cells can protect the inner bacteria cells from antimicrobial drugs. [ 43 ] Phage therapy is a technique that was discovered before antibiotics, but fell to the wayside as antibiotics became predominate.
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The increased cell length can protect bacteria from protozoan predation and neutrophil phagocytosis by making ingestion of cells more difficult. [ 1 ] [ 3 ] [ 4 ] [ 5 ] Filamentation is also thought to protect bacteria from antibiotics, and is associated with other aspects of bacterial virulence such as biofilm formation.
Surgical and dental instruments are also sterilized to prevent infection by bacteria. Disinfectants such as bleach are used to kill bacteria or other pathogens on surfaces to prevent contamination and further reduce the risk of infection. Bacteria in food are killed by cooking to temperatures above 73 °C (163 °F). [citation needed]
The function of the slime layer is to protect the bacteria cells from environmental dangers such as antibiotics and desiccation. [1] The slime layer allows bacteria to adhere to smooth surfaces such as prosthetic implants and catheters, as well as other smooth surfaces like petri-dishes.
Rheumatic heart disease (a condition that can occur when the bacteria that causes strep throat isn’t treated with antibiotics) Endocarditis (an infection of the inner lining of your heart)