| Definition |
identifies sequences derived by direct molecular isolation from a bulk environmental DNA sample
(by PCR with or without subsequent cloning of the
product, DGGE, or other anonymous methods) with no
reliable identification of the source organism.
Environmental samples include clinical samples,
gut contents, and other sequences from anonymous
organisms that may be associated with a particular
host. They do not include endosymbionts that can be
reliably recovered from a particular host, organisms
from a readily identifiable but uncultured field sample
(e.g., many cyanobacteria), or phytoplasmas that can be
reliably recovered from diseased plants (even though
these cannot be grown in axenic culture).
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