This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Systemic Bacteriology Pa 1 (Gram Positive Cocci, Gram Negative Cocci), Subject name: Microbiology
All are medically impoant streptococci except - 
Select and explain. 
A. Strep. pyogenes, B. Strep. agalactiae, C. Strep. equisimilus, D. Strep. salivarius
D: Strep. salivarius
Answer: D: Strep. salivarius 
Explanation: Option 1 Streptococcus pyogenes - suppurative ,nonsuppurative manifestations. Option 2 S. agalactiae Neonatal sepsis and meningitis Puerperal sepsis and peripaum fever Infections in elderly people with underlying illness Option 3 Streptococcus dysgalactiae subspecies equismilis (SDSE) Often referred to as b-hemolytic streptococci. Large colony-forming human groups C and G streptococci Option 4 Streptococcus salivarus (Alpha-hemolytic streptococci) is normal flora of oral cavity (saliva) and rarely causes disease to humans