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Under a high magnification of 12,483X, this scanning electron micrograph (SEM) depicted spores from the Sterne strain of Bacillus anthracis bacteria. A key characteristic of the Sterne strain of B. anthracis is the wrinkled surface of the protein coat of these bacterial spores. These spores can live for many years which, enables the bacteria to survive in a dormant state. Anthrax is an acute disease caused by the bacterium Bacillus anthracis. Bacillus anthracis is a rod-shaped, Gram-positive, aerobic bacterium about 1 by 9 micrometers in length. Most forms of the disease are lethal, and it affects both humans and other animals. There are effective vaccines against anthrax, and some forms of the disease respond well to antibiotic treatment. When spores are inhaled, ingested, or come into contact with a skin lesion on a host, they may become reactivated and multiply rapidly. Anthrax spores can be produced in vitro and used as a biological weapon. Anthrax does not spread directly from one infected animal or person to another; it is spread by spores. Bacillus anthracis bacterial spores are soil-borne. There are three types of anthrax cutaneous, inhalation, and gastrointestinal. Symptoms of cutaneous anthrax include a swollen glands, muscle ache, headache, fever, nausea, vomiting, and a red-brown raised spot that enlarges, blisters, and hardens, forming an ulcer crater with black crust. Symptoms of inhalation anthrax are flulike and may progress to respiratory distress, shock, coma, and death. Symptoms of gastrointestinal anthrax include loss of appetite, bloody diarrhea, and abdominal pain.
June 2nd, 2013
Viewed 3 Times - Last Visitor from Ottawa, ON - Canada on 02/12/2014 at 4:31 PM