Yahoo Web Search

  1. Ads
    related to: wikipedia e coli bacteria
  1. From Wikipedia, the free encyclopedia Escherichia coli O157:H7 is a serotype of the bacterial species Escherichia coli and is one of the Shiga-like toxin–producing types of E. coli. It is a cause of disease, typically foodborne illness, through consumption of contaminated and raw food, including raw milk and undercooked ground beef.

    Escherichia coli O157:H7 - Wikipedia

    https://en.wikipedia.org/wiki/Escherichia_coli_O157:H7
  2. Escherichia coli - Wikipedia

    en.wikipedia.org › wiki › Escherichia_coli

    Escherichia coli ( / ˌɛʃəˈrɪkiə ˈkoʊlaɪ / ), also known as E. coli ( / ˌiː ˈkoʊlaɪ / ), is a Gram-negative, facultative anaerobic, rod-shaped, coliform bacterium of the genus Escherichia that is commonly found in the lower intestine of warm-blooded organisms (endotherms).

  3. Pathogenic Escherichia coli - Wikipedia

    en.wikipedia.org › wiki › Pathogenic_Escherichia_coli

    Escherichia coli (Latin pronunciation: [eskeˈrikja ˈkoli] Anglicized to / ˌɛʃəˈrɪkiə ˈkoʊlaɪ /; commonly abbreviated E. coli) is a gram-negative, rod-shaped bacterium that is commonly found in the lower intestine of warm-blooded organisms (endotherms).

  4. Escherichia coli - Simple English Wikipedia, the free ...

    simple.m.wikipedia.org › wiki › Escherichia_coli

    Escherichia coli or E. coli is a bacterium that can be found in human intestines. Scientists have studied E. coli a lot, and know more about how E. coli cells work than any other organism. E. coli is not always harmful. In fact, the only known harmful strand is O157.

  5. Escherichia coli - Simple English Wikipedia, the free ...

    simple.wikipedia.org › wiki › Escherichia_coli

    From Simple English Wikipedia, the free encyclopedia Escherichia coli or E. coli is a bacterium that lives in the intestines of people and other warm-blooded animals. Scientists have studied E. coli a lot, and know more about how E. coli cells work than any other organism. E. coli is usually not harmful.

  6. Escherichia coli O157:H7 - Wikipedia

    en.wikipedia.org › wiki › Escherichia_coli_O157:H7
    • Overview
    • Signs and symptoms
    • Bacteriology
    • Transmission
    • Diagnosis
    • Surveillance

    Escherichia coli O157:H7 is a serotype of the bacterial species Escherichia coli and is one of the Shiga-like toxin–producing types of E. coli. It is a cause of disease, typically foodborne illness, through consumption of contaminated and raw food, including raw milk and undercooked ground beef. Infection with this type of pathogenic bacteria may lead to hemorrhagic diarrhea, and to kidney failure; these have been reported to cause the deaths of children younger than five years of age, of...

    E. coli O157:H7 infection often causes severe, acute hemorrhagic diarrhea and abdominal cramps. Usually little or no fever is present, and the illness resolves in 5 to 10 days. It can also sometimes be asymptomatic. In some people, particularly children under five years of age, persons whose immunologies are otherwise compromised, and the elderly, the infection can cause hemolytic uremic syndrome, in which the red blood cells are destroyed and the kidneys fail. About 2–7% of infections ...

    Like the other strains of the species, O157:H7 is gram-negative and oxidase-negative. Unlike many other strains, it does not ferment sorbitol, which provides a basis for clinical laboratory differentiation of the strain. Strains of E. coli that express Shiga and Shiga-like toxins gained that ability via infection with a prophage containing the structural gene coding for the toxin, and nonproducing strains may become infected and produce shiga-like toxins after incubation with shiga toxin positiv

    Infection with E. coli O157:H7 can come from ingestion of contaminated food or water, or oral contact with contaminated surfaces. Examples of this can be undercooked ground beef but also leafy vegetables and raw milk. Fields often get contaminated with the bacterium through irrigation processes or contaminated water naturally entering the soil. It is highly virulent, with a low infectious dose: an inoculation of fewer than 10 to 100 CFU of E. coli O157:H7 is sufficient to cause infection, compar

    A stool culture can detect the bacterium, although it is not a routine test and so must be specifically requested. The sample is cultured on sorbitol-MacConkey agar, or the variant cefixime potassium tellurite sorbitol-MacConkey agar. On SMAC agar, O157:H7 colonies appear clear due to their inability to ferment sorbitol, while the colonies of the usual sorbitol-fermenting serotypes of E. coli appear red. Sorbitol nonfermenting colonies are tested for the somatic O157 antigen before being confirm

    E. coli O157:H7 infection is nationally reportable disease in the US, Great Britain, and Germany, and most US states. It is also reportable in most states of Australia including Queensland.

  7. Escherichia coli - Wikipedia, la enciclopedia libre

    es.wikipedia.org › wiki › Escherichia_coli
    • Historia
    • Microbiología
    • Epidemiología
    • Patogenia
    • Tratamiento
    • Enlaces Externos

    Theodore von Escherich, pediatra y microbiólogo alemán, estudió en el año 1884 los microbios que se encontraban en el intestino infantil, a partir de sus heces, para establecer su rol en la digestión y la enfermedad. En el año 1885 publicó los resultados de su estudio, en cuyo reporte describe el aislamiento y caracterización de bacterias de rápido crecimiento con forma de varas cortas y delgadas que llamó Bacterium coli commune. Aunque posteriormente el microorganismo fue descrito por varios otros investigadores con múltiples sinónimos, Escherich fue reconocido como el primero estableciéndose el nombre definitivo del microbio como Escherichia coli en 1954.[1]​[4]​[10]​ En 1933, Alfred Adam mostró que ciertos serotipos de «dyspepsie koli» (como le llamaba a las cepas de E. coli diarreogénicas) estaban implicados en epidemias de diarrea pediátrica. En 1944, Kauffman propuso un esquema de clasificación que aún se usa con el fin de diferenciar los tipos comensales de los patógenos y su...

    Escherichia coli, en su hábitat natural, vive en los intestinos de la mayor parte de los mamíferos sanos. Es el principal organismo anaerobio facultativo del sistema digestivo. En individuos sanos, es decir, si la bacteria no adquiere elementos genéticos que codifican factores virulentos, la bacteria actúa como un comensal formando parte de la microbiota intestinal y ayudando así a la absorción de nutrientes. En humanos, Escherichia coli coloniza el tracto gastrointestinal de un neonato adhiriéndose a las mucosidades del intestino grueso dentro de pocas horas de nacido. Desde entonces permanece en una relación de mutuo beneficio. No obstante, estas cepas comensales pueden producir infecciones en el paciente inmunodeprimido. Las cepas patógenas de E. coli, por el contrario, en cuanto colonizan un huésped sano, pueden producir infecciones de diversa severidad en el intestino, las vías urinarias, meningitis, sepsis, entre otras infecciones.[11]​ E. coli se puede aislar e identificar a...

    La diarrea producida por cepas patogénicas de E. coli es una causa importante de muerte en niños menores de 5 años, especialmente en las regiones de África subsahariana y Asia del Sur donde es una de las cuatro causas más importantes de diarrea moderada y severa, potencialmente letales. Un incremento en la fatalidad se asocia con las cepas enteropatogénica, ECEP, y enterotoxigénica, ECET.[4]​

    Escherichia coli puede causar infecciones intestinales y extra intestinales generalmente graves, tales como infecciones del aparato excretor, vías urinarias, cistitis, Uretritis, meningitis, peritonitis, mastitis, septicemia y neumoníaGram-negativa.

    El uso de antibióticoses poco eficaz y casi no se prescribe. Para la diarrea se sugiere el consumo de abundante líquido y evitar la deshidratación. Cuando una persona presenta diarrea no debe ir a trabajar o asistir a lugares públicos para evitar el contagio masivo. En algunas patologías como la pielonefritis hay que considerar el uso de alguna cefalosporinaendovenosa.

  8. Escherichia - Wikipedia

    en.wikipedia.org › wiki › Escherichia

    Escherichia / ˌɛʃəˈrɪkiə / is a genus of Gram-negative, non- spore -forming, facultatively anaerobic, rod-shaped bacteria from the family Enterobacteriaceae.

  9. Molecular cloning - Wikipedia

    en.wikipedia.org › wiki › Molecular_cloning
    • Summary
    • History
    • Overview
    • Steps
    • Applications

    Molecular cloning is a set of experimental methods in molecular biology that are used to assemble recombinant DNA molecules and to direct their replication within host organisms. The use of the word cloning refers to the fact that the method involves the replication of one molecule to produce a population of cells with identical DNA molecules. Molecular cloning generally uses DNA sequences from two different organisms: the species that is the source of the DNA to be cloned, and the species that

    Prior to the 1970s, the understanding of genetics and molecular biology was severely hampered by an inability to isolate and study individual genes from complex organisms. This changed dramatically with the advent of molecular cloning methods. Microbiologists, seeking to understand the molecular mechanisms through which bacteria restricted the growth of bacteriophage, isolated restriction endonucleases, enzymes that could cleave DNA molecules only when specific DNA sequences were encountered. Th

    Molecular cloning takes advantage of the fact that the chemical structure of DNA is fundamentally the same in all living organisms. Therefore, if any segment of DNA from any organism is inserted into a DNA segment containing the molecular sequences required for DNA replication, and the resulting recombinant DNA is introduced into the organism from which the replication sequences were obtained, then the foreign DNA will be replicated along with the host cell's DNA in the transgenic organism. Mole

    In standard molecular cloning experiments, the cloning of any DNA fragment essentially involves seven steps: Choice of host organism and cloning vector, Preparation of vector DNA, Preparation of DNA to be cloned, Creation of recombinant DNA, Introduction of recombinant DNA into host organism, Selection of organisms containing recombinant DNA, Screening for clones with desired DNA inserts and biological properties. Although the detailed planning of the cloning can be done in any text editor, toge

    Molecular cloning provides scientists with an essentially unlimited quantity of any individual DNA segments derived from any genome. This material can be used for a wide range of purposes, including those in both basic and applied biological science. A few of the more important applications are summarized here.

  10. Bacteria - Wikipedia

    en.wikipedia.org › wiki › Bacteria

    This is achievable in some well-studied bacteria, with models of Escherichia coli metabolism now being produced and tested. [198] [199] This understanding of bacterial metabolism and genetics allows the use of biotechnology to bioengineer bacteria for the production of therapeutic proteins, such as insulin , growth factors , or antibodies .

  11. Walkerton E. coli outbreak - Wikipedia

    en.wikipedia.org › wiki › Walkerton_E

    From Wikipedia, the free encyclopedia The Walkerton E. coli outbreak was the result of a contamination of the drinking water supply of Walkerton, Ontario, Canada, with E. coli and Campylobacter jejuni bacteria.

  12. People also search for
  1. Ads
    related to: wikipedia e coli bacteria