(A) Chain.
(B) Cluster.
Reproduced with permission from: Marler LM, Siders JA, Allen SD. Direct Smear Atlas: A Monograph of Gram-Stained Preparations of Clinical Specimens. Lippincott Williams & Wilkins, Philadelphia 2001. Copyright © 2001 Lippincott Williams & Wilkins.
www.lww.com.
