Photo Quiz Answer – Q.001 – June 10, 2011
Cutaneous anthrax due to Bacillus anthracis.
Most cases of cutaneous anthrax are caused by contamination of an open wound, often with bacteria present on wool, leather, or hair from infected animals, particularly goats.
Untreated, 20% of patients with cutaneous anthrax will die, though death is rare with appropriate antibiotic therapy (<1%).
Ciprofloxacin 500 mg twice daily or doxycycline 100 mg twice daily is recommended for the treatment of anthrax in adults and children (with the consideration that amoxicillin or penicillin may be preferable in growing children or pregnant women.)
Treatment should be continued for 10 days, unless a bio-terrorist attack is a concern, in which case 60 days of treatment is recommended.
The above image is a Gram stain of the anthrax bacterium. For additional images, see below.
For more information, visit Questions and Answers About Anthrax