Anthrax bacteria. Coloured transmission electron micrograph (TEM) of anthrax bacteria (Bacillus anthracis). Anthrax can infect humans and livestock. There are three main forms of the disease. Cutaneous (skin) anthrax causes a raised, itchy lesion at the site of entry of the bacteria. Antibiotic drugs can cure the disease, but it may be fatal if left untreated. Gastrointestinal anthrax is more serious, causing vomiting of blood and severe diarrhoea. Pulmonary (lung) anthrax, caused by inhaling the bacteria, is fatal in most cases unless treated soon after exposure. Magnification: x3175 when printed 10cm high.
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