Pulmonary anthrax is the most deadly form because it primarily affects which system?

• A. Digestive system
• B. Respiratory system
• C. Nervous system
• D. Cardiovascular system

Answer: (B)

The main idea here is which body system is directly affected by pulmonary anthrax. Inhaled Bacillus anthracis spores germinate in the lungs and nearby mediastinal lymph nodes, and the bacteria release potent toxins that cause rapid edema, tissue necrosis, and inflammation in the respiratory tract. This direct involvement of the lungs and airways disrupts gas exchange and can quickly progress to respiratory failure. Because the lungs are essential for oxygen uptake, damage there makes pulmonary anthrax exceptionally dangerous, with toxins and bacteria also spreading systemically to cause septicemia and shock. The other systems aren’t the primary targets in this form—digestive would be involved in intestinal anthrax, the nervous system isn’t the main site of disease, and cardiovascular problems arise mainly as a consequence of systemic infection rather than as the initial target.