Streptococcus pneumoniae

(A) Reproduced with permission from: McClatchey KD M.D., D.D.S. Clinical Laboratory Medicine, 2nd Edition. Philadelphia: Lippincott Williams & Wilkins, 2002. Copyright © 2002 Lippincott Williams & Wilkins.
(B) Reproduced with permission from: Koneman's Color Atlas and Textbook of Diagnostic Microbiology, 6th ed. Philadelphia: Lippincott Williams & Wilkins, 2006. Copyright © 2006 Lippincott Williams & Wilkins.