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  2. Penicillin - Wikipedia

    en.wikipedia.org/wiki/Penicillin

    Penicillin and other β-lactam antibiotics act by inhibiting penicillin-binding proteins, which normally catalyze cross-linking of bacterial cell walls. Penicillin kills bacteria by inhibiting the completion of the synthesis of peptidoglycans, the structural component of the bacterial cell wall. It specifically inhibits the activity of enzymes ...

  3. Discovery of penicillin - Wikipedia

    en.wikipedia.org/wiki/Discovery_of_penicillin

    In 1944, Margaret Jennings determined how penicillin acts, and showed that it has no lytic effects on mature organisms, including staphylococci; lysis occurs only if penicillin acts on bacteria during their initial stages of division and growth, when it interferes with the metabolic process that forms the cell wall. This brought Fleming's ...

  4. β-Lactam antibiotic - Wikipedia

    en.wikipedia.org/wiki/Β-Lactam_antibiotic

    β-Lactam antibiotics are indicated for the prevention and treatment of bacterial infections caused by susceptible organisms. At first, β-lactam antibiotics were mainly active only against gram-positive bacteria, yet the recent development of broad-spectrum β-lactam antibiotics active against various gram-negative organisms has increased their usefulness.

  5. A new type of bacteria was found in 50% of colon cancers ...

    www.aol.com/news/type-bacteria-found-50-colon...

    A type of bacteria that causes dental plaque may be behind a treatment-resistant form of colorectal cancer, a study published Wednesday in the journal Nature found.. The particular bacterium ...

  6. Penicillin-binding proteins - Wikipedia

    en.wikipedia.org/wiki/Penicillin-binding_proteins

    PBPs bind to β-lactam antibiotics because they are similar in chemical structure to the modular pieces that form the peptidoglycan. [9] When they bind to penicillin, the β-lactam amide bond is ruptured to form a covalent bond with the catalytic serine residue at the PBPs active site. This is an irreversible reaction and inactivates the enzyme.

  7. Vaccine targeting common gut bacteria E.coli could help ...

    www.aol.com/vaccine-targeting-common-gut...

    Vaccines targeting common gut bacteria E.coli could reduce rates of colon cancer in countries such as the UK, scientists have suggested.. Researchers from the Wellcome Sanger Institute have ...

  8. Carcinogenic bacteria - Wikipedia

    en.wikipedia.org/wiki/Carcinogenic_bacteria

    Bacteria involved in causing and treating cancers. Cancer bacteria are bacteria infectious organisms that are known or suspected to cause cancer. [1] While cancer-associated bacteria have long been considered to be opportunistic (i.e., infecting healthy tissues after cancer has already established itself), there is some evidence that bacteria may be directly carcinogenic.

  9. Antibiotic - Wikipedia

    en.wikipedia.org/wiki/Antibiotic

    Antibiotics are also used to prevent infection in cases of neutropenia particularly cancer-related. [37] [38] The use of antibiotics for secondary prevention of coronary heart disease is not supported by current scientific evidence, and may actually increase cardiovascular mortality, all-cause mortality and the occurrence of stroke. [39]

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