For bacterial and fungal stains. References: Helicobactor pylori in peptic ulcer disease, NIH Consensus Statement Online, January 1994, 12(1): 1:23. Luna 1AFIP 3rd ed. McGraw Hill, 236. Fail, Rena, AS, HT (ASCP) Medical University of South Carolina, Histologic. Vol. XXXIV, No 2, Nov. 2001, p. 32.