Stained light micrograph (LM) of Bacillus anthracis, a large, chained, spore-forming bacteria that causes the disease Anthrax. Symptoms vary depending on the type of exposure. With skin exposure, swollen lymph glands and a boil-like lesion will appear. With respiratory exposure, symptoms resemble a common cold at first, but progress to severe breathing problems and shock. Inhalation of anthrax is usually fatal as its spores produce lethal toxins that rupture the alveoli in the lungs. Respiratory anthrax is a potential agent in biological warfare, as the spores of the bacterium can be freeze-dried and disseminated as an aerosol or powder. Magnification: 1000x at 35mm.