He aha te rereketanga o te rihi Petri me te pereti ahurea?
He Rihi Petri—te ipu papaku, porowhita, kapi i hangaia e Julius Richard Petri i te tau 1887—e noho tonu ana hei kohatu kokonga o te mahi moroiti mata totoka, engari ko te pereti ahurea (te nuinga he pereti moroiti puna-maha) he paraharaha, tapawhā, ANSI-paerewa pereti kirihou kei roto nga puna wehe.