Anthrax

Disease Description (Causes and Symptoms)

• Cause: Infection with Bacillus anthracis (anthrax bacteria). It occurs after exposure to heat-resistant spores present in soil and can be transmitted to humans mainly through contaminated animals (herbivores) or their by-products (fur, leather, bones, etc.). Spores can survive in the environment for long periods. Person-to-person transmission is rare.
• Pathophysiology: When spores entering the body transform into active cells and produce toxins (e.g., protective antigen and lethal factor), they can cause tissue necrosis, spread into the bloodstream, sepsis·shock, and toxin-related organ damage.
• Major clinical forms and symptoms:
  • Cutaneous anthrax: Initial localized itching·rash → vesicular lesions → formation of central ischemic necrosis (black eschar); pain may be mild. Systemic symptoms (fever·lymph node enlargement) occur in severe cases.
  • Gastrointestinal anthrax: Nausea·vomiting·abdominal pain·diarrhea·fever; may progress to intestinal perforation·bleeding·sepsis. The mortality rate is high (25–60% in the literature).
  • Inhalational (pulmonary) anthrax: Initially cold·bronchitis-like symptoms → rapidly progressive respiratory failure, hemorrhagic mediastinal lymphadenitis, and shock. Without treatment, the fatality rate is very high.
• Diagnostic clues: Exposure history (contact with contaminated animals·animal products, regional outbreaks), typical skin lesions, observation of gram-positive bacilli in blood·tissue, culture·PCR·blood culture, etc.

Treatment Methods and Precautions

• General principles: If anthrax is suspected, immediately transfer the patient to a medical institution and isolate them (following infection-control guidelines), and report the case to public health authorities. Early antibiotic treatment is important for the prognosis.
• Antibiotics:
  • Initial treatment·post-exposure prophylaxis and mild cutaneous anthrax: Ciprofloxacin or Doxycycline or penicillin-class antibiotics (when susceptibility is confirmed) are recommended (the choice and duration are determined according to the clinical form·severity·susceptibility).
  • Severe·inhalational·gastrointestinal anthrax: Combination therapy with intravenous (IV) antibiotics (e.g., Ciprofloxacin + clindamycin/linezolid/carbapenem, etc.) and supportive treatment.
• Antitoxin treatment: In severe inhalational or systemic anthrax, antitoxin agents (e.g., raxibacumab, obiltoxaximab, Anthrax Immune Globulin, etc.) may be used as adjunctive treatment (depending on availability and national guidelines).
• Surgery/procedures: Surgical treatment such as debridement of necrotic tissue or drainage of empyema may be necessary (depending on the situation).
• Lifestyle management·self-care:
  • If symptoms develop after contact with animal-derived materials, visit a medical institution immediately.
  • Practice thorough hand hygiene after touching skin lesions, and wash·disinfect contaminated clothing separately.
• Risk of complications: Sepsis, toxic meningitis (related to anthrax bacteria), respiratory failure, and multiorgan failure.
• Precautions:
  • When handling suspected animal carcasses or contaminated materials, follow the relevant guidelines (incineration or deep burial, in accordance with public health guidelines).
  • Spores are resistant to ordinary boiling·ultraviolet light. According to RAG information, they are known to be capable of being killed by boiling sufficiently for 10 minutes or longer; however, follow public health authority guidelines for on-site disinfection·handling methods.
  • The availability of anthrax vaccines in Korea may be limited (varies by country).

Checklist Before an Outpatient Visit (Including Items to Bring and Example Questions)

• Items to bring:
  • List of medications currently being taken (including prescriptions)·allergies
  • Record of the onset and course of any recent fever·symptoms (symptom onset date; take photos of lesions if possible)
  • Recent animal contact history (type, date of contact), and whether there was contact with animal products (wool·leather·fur, etc.)
  • Travel history·local outbreak information (if applicable)
  • Previous test results (blood tests, chest imaging, etc.) and underlying conditions (including whether immunocompromised)
• Key information to tell the healthcare provider during the outpatient visit:
  • When symptoms began and how they have changed (fever, shortness of breath, abdominal pain, changes in skin lesions, etc.)
  • Recent animal contact or suspected exposure
  • Whether you have any antibiotic allergies
• Expected tests·evaluation: Blood tests, blood culture, culture and PCR of lesion discharge·tissue, chest X-ray/CT (if inhalational anthrax is suspected), and lumbar puncture if necessary (when meningitis is suspected).

General Example Questions to Ask the Doctor

• "What are the main side effects of this medication (the recommended antibiotic), and what should I be careful about?"
• "What is the prognosis for my condition? Approximately how long will recovery take?"
• "Is there a risk of recurrence after treatment? Will follow-up tests or additional preventive measures be needed?"
• "When can I return to work (or the workplace)? Are there any special guidelines if my work involves handling animals?"

Examples of Condition-Specific Questions

• "What tests can confirm anthrax in my skin lesion (culture, PCR, biopsy, etc.)? How long will it take to receive the test results?"
• "Exposure is suspected (e.g., contact with contaminated woolen fabric). Do I need preventive antibiotics after exposure? How will the treatment duration and choice of medication be determined?"