Bacillus anthracis is a bacteria that causes the disease anthrax.
Links for Category A:
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  http://www.microbes.info/resources/153/anthrax
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  Chapare mammarenavirus is a virus that belongs to the virus family Arenaviridae. This virus causes viral hemorrhagic fever. http://www.microbes.info/resources/1114/chapare-mammarenavirus
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  Clostridium botulinum is a bacteria that causes botulism. http://www.microbes.info/resources/512/clostridium-botulinum
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  Dengue virus is a virus that belongs to the virus family Flaviviridae. This virus causes viral hemorrhagic fever. http://www.microbes.info/resources/682/dengue-virus
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  Ebola virus is a virus that belongs to the virus family Filoviridae. This virus causes viral hemorrhagic fever. http://www.microbes.info/resources/676/ebola-virus
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  Francisella tularensis is a bacteria that causes tularemia. http://www.microbes.info/resources/527/francisella-tularensis
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  Guanarito mammarenavirus is a virus that belongs to the virus family Arenaviridae. This virus causes viral hemorrhagic fever. http://www.microbes.info/resources/1113/guanarito-mammarenavirus
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  Hantaviruses are viruses that belongs to the virus family Bunyaviridae. These viruses cause hanta pulmonary syndrome, rift valley fever and crimean congo hemorrhagic fever. http://www.microbes.info/resources/656/hantavirus
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  Junin mammarenavirus is a virus that belongs to the virus family Arenaviridae. This virus causes viral hemorrhagic fever. http://www.microbes.info/resources/643/junin-mammarenavirus
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  Lassa mammarenavirus is a virus that belongs to the virus family Arenaviridae. This virus causes viral hemorrhagic fever. http://www.microbes.info/resources/644/lassa-mammarenavirus
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  Lujo mammarenavirus is a virus that belongs to the virus family Arenaviridae. This virus causes viral hemorrhagic fever. http://www.microbes.info/resources/1115/lujo-mammarenavirus
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  Machupo mammarenavirus is a virus belonging to the Arenaviridae virus family. This virus causes viral hemorrhagic fever. http://www.microbes.info/resources/1112/machupo-mammarenavirus
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  Marburgvirus is a virus genus that belongs to the virus family Filoviridae. Viruses belonging to this genus causes viral hemorrhagic fever. http://www.microbes.info/resources/677/marburgvirus
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  Variola virus belongs to the virus family Poxviridae and causes the disease smallpox. http://www.microbes.info/resources/742/variola-virus
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  Yersinia pestis is a bacteria that causes plague. http://www.microbes.info/resources/569/yersinia-pestis


