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Phage therapy is the use of bacteriophages to treat bacterial infections. Bacteriophage treatment offers a possible alternative to conventional antibiotic treatments for bacterial infection. [55] It is conceivable that, although bacteria can develop resistance to phages, the resistance might be easier to overcome than resistance to antibiotics.
Structural model at atomic resolution of bacteriophage T4 [1] The structure of a typical myovirus bacteriophage Anatomy and infection cycle of bacteriophage T4.. A bacteriophage (/ b æ k ˈ t ɪər i oʊ f eɪ dʒ /), also known informally as a phage (/ ˈ f eɪ dʒ /), is a virus that infects and replicates within bacteria and archaea.
[10] [11] [12] Other related research also explored the role of bacteriophage in disease and bacterial survival, showing that lysogenic bacteriophages are activated in vivo in the presence of a small molecule found in saliva. [13] From his work on bacteriophage, Fischetti coined the term 'phages control the biosphere' in 2018. [14]
The bacteria are infected with phages and die, producing new phages; the medium clears. The medium is filtered through porcelain filter, holding back bacteria and larger objects; only the smaller phages pass through. In early 1919, d'Hérelle isolated phages from chicken feces, successfully treating a plague of chicken typhoid with them. [13]
T7 has a life cycle of 17 min at 37˚C, i.e. the time from infection to the lysis of the host cell when new phages are released. Due to the short latent period, most physiological studies are conducted at 30˚C where infected cells lyse after 30 min. However, high-fitness strains of T7 have been isolated with a latent period of only ~11 min at ...
Methylene blue is used in aquaculture and by tropical fish hobbyists as a treatment for fungal infections. It can also be effective in treating fish infected with ich, the parasitic protozoa Ichthyophthirius multifiliis. It is usually used to protect newly laid fish eggs from being infected by fungus or bacteria.
Edwardsiella tarda is a member of the family Hafniaceae. [1] [2] The bacterium is a facultatively anaerobic, small, motile, gram negative, straight rod with flagella.[1] [2] Infection causes Edwardsiella septicemia (also known as ES, edwardsiellosis, emphysematous putrefactive disease of catfish, fish gangrene, and red disease) in channel catfish, eels, and flounder.
Bacterial resistance to phages puts pressure on the phages to develop stronger effects on the bacteria. The Red Queen hypothesis describes this relationship, as the organisms must constantly adapt and evolve in order to survive. [15] This relationship is important to understand as phages are now being used for more practical and medicinal purposes.