Bacterium
Explanation
Anthrax is a serious infectious disease caused by gram-positive, rod-shaped bacteria known as Bacillus anthracis. It primarily affects livestock and wild game, but humans can become infected through direct or indirect contact with sick animals.Detailed Analysis:
- Bacterium (Correct): The causative agent, Bacillus anthracis, is a bacterium. These bacteria can form dormant spores that are able to survive in the environment (soil) for long periods. When spores enter the body of an animal or person, they can activate, multiply, and produce toxins.
- Virus (Incorrect): Viral diseases include Influenza, HIV/AIDS, and COVID-19. Anthrax is not viral.
- Fungus (Incorrect): Fungal diseases include Ringworm and Mucormycosis. Anthrax is not fungal.
- Protozoan (Incorrect): Protozoan diseases include Malaria and Amoebiasis. Anthrax is not protozoan.
Key Takeaway: Anthrax is a bacterial disease caused by the spore-forming bacterium Bacillus anthracis.