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Florida Poison Information Center/Jacksonville
At Shands Jacksonville
University of Florida Health Science Center
Mechanism of Action
It is a naturally occurring disease of plant eating animals such as swine, goats, sheep and cattle. It is caused by the bacterium, Bacillus anthracis.
Anthrax is a highly lethal agent. It is estimated that there are 100 million lethal doses per gram of spores. Anthrax spores can remain viable for decades in soil and animal products. It is a stable substance, easy to produce in large quantities and difficult to detect. Aerosol or munitions for warfare purposes can be used to distribute anthrax.
- humans are infected by one of 3 ways
most common form. Occurs through breaks in the skin, typically as a result of contact with an infected animal. It presents with itching (first 2-3 hours) at the site followed by formation of a necrotic ulcer (36 hours). This may progress to systemic infection. The lesion discharge is potentially infectious. Five to twenty percent of untreated cutaneous anthrax may be fatal.
results in pulmonary infection and occurs from breathing in spores. Initial symptoms are non-specific with malaise, myalgias, a dry hacking cough and low grade fevers. There may be improvement after 2-4 days, but this is followed by sudden worsening symptoms with respiratory distress, cyanosis, hemoptysis, shock and death within 24 hours. Most cases are fatal despite treatment.
is caused by eating the meat of an infected animal. This route has very low potential for use as a biologic warfare agent. Presentation includes abdominal distress, rapidly developing ascites, diarrhea, fever, and signs of sepsis.
- Human to human transmission has not been known to occur with inhalational or intestinal modes, but has rarely occurred with the cutaneous form. However, clothes should be bagged until incinerated or autoclaved. The skin should be washed with soap and water. Appropriate protective garments (gloves, gowns) should be used when in contact with infective material. Patients should be isolated with drainage/secretion precautions until antibiotics are completed and lesions have healed. Surgical tampering of the lesions of the skin should be avoided. All patients with suspected anthrax should be admitted to an intensive care unit.
For anthrax inhalational
Ciprofloxacin IV If PCN sensitive strain Age < 12: penicillin G IV Age >12: penicillin G IV Doxycycline
1. Franz DR, Jahrling PB, Friedlander AM. Clinical Recognition and Management of Patients
Exposed to Biological Warfare Agents. JAMA 1997;278:399-411.
2. Ibrahim KH, Wright DH, Rotschafer JC. Bacillis anthracis: Medical Issues of Biologic Warfare.
3. Inglesby TV, et al. Anthrax as a Biological Weapon. JAMA 1999;281:1735-45.
Florida Poison Information Center Network
Centers are located in Jacksonville, Tampa, & Miami
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