I would like to ask the group to try to clarify a question for me:

Why is pus green?

A medical student just called to ask me to clarify my comment
that membranes affected by acute inflammation, as in acute
chorioamnionitis, have a greenish color because of the presence
of myeloperoxidase.  Does development of the green color
require proteolysis or oxidation of a heme group, or does fixation
bring out the green as it does with bilirubin?  Is there a reference
I can cite, or is this strictly in the realm of lore?  Thanks,

Hal Hawkins
UTMB Galveston