Microbiology Waterhouse -Friderichsen syndrome is caused by which of the following organisms? A Streptococcus Pyogenes B Neisseria Meningitidis C Clostridium Perfringens D Staphylococcus Aureus 💡 Explanation Waterhouse -Friderichsen syndrome is caused by which of the following organisms? ✓ Correct Answer: B. Neisseria Meningitidis