Table T1. Definitions of terms used in microbiology sampling.
Term
Definition
Aseptic A clinical definition referring to freedom from pathogens. Clinical conditions are not applicable to ODP operations.
Sterile The most stringent category used during Leg 201. Sterile indicates the absence of contaminating prokaryotic cells that are capable of metabolism and growth and their nucleic acids.
Clean Defined as giving careful consideration and effort to avoid cross-contamination. May involve ethanol washing, flaming instruments, etc., and may approach sterile conditions.
Anaerobic A property of organisms indicating the ability to live without oxygen. Also a property of a method ("anaerobic cultivation") or of laboratory cultivation equipment ("anaerobic chambers").
Anoxic Property of an oxygen-free environment such as used in a glove bag or N2-flushed sampling bucket.