This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
All are medically important streptococci except - 
Select and explain. 
A. Strep. pyogenes, B. Strep. agalactiae, C. Strep. equisimilis, D. Strep. salivarius
D: Strep. salivarius
Answer: D: Strep. salivarius 
Explanation: STREPTOCOCCI 

Streptococci are gram-positive, nonmotile, non-spore-forming, catalase & oxidase negative medically important bacteria.
Many organisms of streptococcus genus cause human diseases.