Francisella tularensis bioweapon in waiting

http://en.wikipedia.org/wiki/Francisella_tularensis

Francisella tularensis is a pathogenic species of Gram-negative bacteria and the causative agent of tularemia, the pneumonic form of which is often lethal without treatment. It is a fastidious, facultative intracellular bacterium which requires cysteine for growth. Due to its low infectious dose, ease of spread by aerosol, and high virulence, F. tularensis is classified as a Tier 1 Select Agent by the U.S. government, along with other potential agents of bioterrorism such as Yersinia pestis, Bacillus anthracis and Ebola virus

Use as a biological weapon
When the U.S. biological warfare program ended in 1969, F. tularensis was one of seven standardized biological weapons it had developed

https://microbewiki.kenyon.edu/index.php/Francisella_tularensis

The F. tularensis is a highly contagious bacteria that can be spread from animals to humans, through vectors such as mosquitos and fleas, or from being breathed in from the air. The bacteria infects humans through skin, mucous membranes, lungs, and the gastrointestinal tract. It primarily infects macrophages of the host organism after it is ingested by phagocytosis. F. tularensis multiply inside the macrophage and later break out the macrophage and invades other cells. The major target organs are lymph nodes, lungs, liver, and kidneys. People infected with tularemia through inhalation also develop hemorrhagic inflammation of the airways early in the disease, and it might develop into bronchopneumonia. No proven vaccine has been created for tularemia, and the general treatment for the disease is antibiotics

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