This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General Microbiology Pa 1 (History, Microscopy, Stains and Structure and Physiology of Bacteria), Subject name: Microbiology
All of the following organisms are known to survive intracellularly except 
Select and explain. 
A. Neisseria meningitides, B. Salmonella typhi., C. Streptococcus pyogenes, D. Legionella pneumophila
C: Streptococcus pyogenes
Answer: C: Streptococcus pyogenes 
Explanation: 1. Streptococcus pyogenes grows extracellular and causes pyogenic infection. 2. Intracellular bacteria are - Listeria monocytogenes Legionella Yersinia Salmonella typhi Shigella Neisseria Mycobacterium Francisella tularensis Pneumococci. 3. Obligate intracellular (Rickettsia, Chlamydia).