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Identification and Characteristics of Corynebacterium diphtheriae

Corynebacterium diphtheriae is the causative agent of diphtheria, an infectious disease characterized by symptoms such as a sore throat, fever, and the formation of a pseudomembrane in the throat. Morphologically, C. diphtheriae appears as Gram-positive, non-spore forming, non-motile bacilli that are club-shaped and can be seen arranged at acute angles or parallel to each other, resembling Chinese letters. These bacteria often contain beaded structures known as metachromatic granules, contributing to their unique appearance during microscopical examination.

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Identification and Characteristics of Corynebacterium diphtheriae

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    4. Most Important Species: C. diphtheriae causes diphtheria.

    5. Identification of Corynebacteria (I) Morphology (microscopical examination): Gram +ve, nonspore forming nonmotile bacilli club-shaped (Coryne= club) arranged at acute angles or parallel to each other? a Chinese letters appearance Beaded (metachromatic granules)

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