**Question:** All are true about cutaneous anthrax except ?

A. Anthrax is caused by the bacterium Bacillus anthracis
B. Cutaneous anthrax is the most common form of anthrax infection
C. Anthrax primarily affects livestock and other mammals
D. Anthrax is a rare disease in developed countries

**Core Concept:**

Cutaneous anthrax is a severe bacterial infection caused by the bacterium Bacillus anthracis. The infection occurs when the spores of Bacillus anthracis enter the body through a break in the skin, typically due to contact with infected animals or their products. Anthrax is a rare but potentially life-threatening illness, affecting both humans and animals. Among the different forms of anthrax, cutaneous anthrax is the most common, accounting for up to 90% of cases.

**Why the Correct Answer is Right:**

The correct answer is **D**: Anthrax is a rare disease in developed countries. This statement is correct because anthrax is primarily a disease of animals and remains endemic in regions with limited access to veterinary services and vaccination programs for livestock. In developed countries, anthrax is primarily associated with occupational risks, such as handling contaminated animal products or working with infected animals.

**Why Each Wrong Option is Incorrect:**

A. **True**: Anthrax is caused by Bacillus anthracis, which is the bacterium responsible for the disease.
B. **True**: Cutaneous anthrax is the most common form of anthrax infection, affecting approximately 90% of cases.
C. **True**: Anthrax primarily affects livestock and other animals, not just humans.

**Clinical Pearl:**

While anthrax is generally considered rare in developed countries, it remains a potential bioterrorism agent and should be considered in the differential diagnosis for any unexplained skin lesions, especially in areas with limited access to veterinary services and vaccination programs. Early diagnosis and treatment are crucial to ensure a favorable outcome. In developed countries, anthrax should be suspected in cases of unusual skin lesions, particularly in individuals with occupational exposure to contaminated animal products or working with infected animals. Rapid diagnosis and treatment are essential to improve patient outcomes.