Which of the following statements about Clostridium tetani and the pathogenesis of tetanus is true?

• A. Clostridium tetani is an obligate aerobe that thrives in oxygen-rich environments.
• B. Tetanus is primarily transmitted through respiratory droplets from infected individuals.
• C. Clostridium tetani produces tetanospasmin, a neurotoxin that blocks inhibitory neurotransmitter release, leading to muscle spasms.
• D. The primary symptom of tetanus is a skin rash at the site of infection.

Answer: (C)

Verified step by step guidance

1. Step 1: Understand the characteristics of Clostridium tetani. It is important to know whether it is an obligate aerobe or anaerobe, and the type of environment it thrives in.
2. Step 2: Review the modes of transmission for tetanus. Determine if it is spread through respiratory droplets or another route.
3. Step 3: Examine the pathogenesis of tetanus, focusing on the toxin produced by Clostridium tetani and its effect on the nervous system.
4. Step 4: Identify the primary symptoms of tetanus and distinguish them from symptoms of other infections or diseases.
5. Step 5: Compare each statement with the scientific facts about Clostridium tetani and tetanus pathogenesis to determine which statement is true.