Diphtheria bacteria. Coloured transmission electron micrograph (TEM) of Corynebacterium diphtheriae bacteria,the cause of diphtheria. The bacteria are Gram-positive,non-motile rods (bacilli). Surrounding each cell is a mucus cell wall (red). Diphtheria is caused by a potent exotoxin released from the bacterium. Symptoms include sore throat,fever and breathing difficulties. Exotoxin damage to the heart and nerves can occur. Treatment is with antitoxins,antibiotics and complete rest | |
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