Medical Actu – Actualités Médicales Quotidienne – Actualité Santé

Tag: GNB

  • Yersinia

    Yersinia

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    Dr. Taoufik

    HISTORY: The genus Yersinia, named after the bacteriologist Alexandre Yersin who first isolated in 1894 the plague bacillus, was proposed in 1944 and formalized in 1974 after the breakup of the genre Pastewella. In 1883 Malassez and Vignal isolated Pasteurella pseudotuberculosis in guinea pigs with pseudo-tuberculous lesions of the liver, spleen, and lymph nodes; this…

  • Vibrio

    Vibrio

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    Dr. Taoufik

    DEFINITIONS AND CLASSIFICATION: The family Vibrionaceae: It includes gram-negative bacilli, mobile or mixed with polar cilia, optional aero-anaerobic growing on ordinary media, reducing nitrate to nitrite, fermenting carbohydrates and giving a positive oxidase reaction. It consists of four genera: Vibrio Plesiomonas, Aeromonas, Photobacterium. The Vibrionaceae are aquatic bacteria.The species of the genera Vibrio, Aeromonas, Plesiomonas…

  • Kingella

    Kingella

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    Dr. Taoufik

    This genus has been described by Henriksen and Bovre in 1976. Appearing in pairs or short chains, that Gram-negative bacilli tend to resist fading. Still, according to the usual criteria, it may possess fimbriaeand show mobility jerks. Bacteria optional aerobic or anaerobic, oxidase (+) catalase (-), it grows (more aerobically and anaerobically) on blood agar…

  • Pseudomonas genus

    Pseudomonas genus

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    Dr. Taoufik

    I – GENERAL CHARACTERISTICS: A – Definition: Gram-negative bacilli, by a polar mobile ciliature rarely still, non-spore forming. Chemo-organotrophic bacteria with a strictly respiratory metabolism with terminal electron acceptor such as oxygen aerobically and for some species anaerobically with nitrate synthesis of nitrate reductase (“breathing nitrates”). Oxidative or inactive in the trial of Hugh and…

  • General information on Clostridium

    General information on Clostridium

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    Dr. Taoufik

    Clostridium are Gram-positive spore forming bacilli, anaerobes. I – CLASSIFICATION: Among the bacilli and gram-positive cocci forming endospores, there are different kinds: Bacilli Cocri Aerobic Bacillus Sporosarcina Sporolactobacillus Oscilhspira Strict anaerobes Clostridium Desulfomaculum The observation of the spore is not always obvious, and put it in evidence using the properties conferred by this structure: –…

  • Francisella Tularensis

    Francisella Tularensis

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    Dr. Taoufik

    Francisella tularensis was isolated after the occurrence of a new disease, pseudo-plague squirrel, observed in Tulare County, California in 1911. In 1921, Francis, American bacteriologist, studied the causal agent and the pathogenesis and made the connection with a known disease in rabbits and cattle since the beginning of the century in the American West. It…

  • Enterobacteriaceae

    Enterobacteriaceae

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    Dr. Taoufik

    I – DEFINITION AND CLASSIFICATION: The Enterobacteriaceae family consists of bacterial genera that are assembled because of their common bacteriological characters. – These are Gram-negative bacilli ranging in size from January to June [im long and 0.3 to 1 microns wide; – Mobiles by peritrichous or immobile cilia; – If developing in aero-anaerobic and ordinary…

  • Clostridium Tetani

    Clostridium Tetani

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    Dr. Taoufik

    Clostridium tetani, formerly known as bacillus Nicolaier, is a gram-positive bacillus spore forming, anaerobic strict, which releases a neurotropic exotoxin entramant a formidable poisoning: tetanus. Despite the existence of an effective vaccine, tetanus is not a rare disease. HISTORY: Already described by Hippocrates, tetanus has been well studied by Larrey during the Napoleonic campaigns. Nicolaier…

  • Campylobacter

    Campylobacter

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    Dr. Taoufik

    HISTORY: In 1913 a mobile bacillus Vibrio-like, was made responsible for the epizootic bovine abortions tasks. This bacillus was designated as Vibrio fetus by Smith and Taylor (USA) in 1919. A French bacteriologist Vinzent, reported in 1949 the first case of human infection with Vibrio fetus. In 1963, through the study of G + C%…

  • Bordetella

    Bordetella

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    Dr. Taoufik

    HISTORY: In 1900 Bordet described a Gram-negative bacilli such as whooping cough agent. In 1906 Bordet and Gengou have managed to grow the bacillus on an agar medium containing peptone potato and mixed with blood. Pertussis has long been a major cause of infant mortality. Vaccination has helped to disappear France this killer.Nevertheless epidemics could…