Well, for someone with a Ph.D. in human nutrition and a postdoc in
developmental immunology, the relationship between "refined sugar"
(sucrose, glucose, dextrose, fructose ???) and "immune suppression"
(T-dependent, independent, complement-mediated, Th1, Th2 ???) is a new
one on me.  I would LOVE to see the references.  In any case, I would
advise against attributing mastitis to a diet containing a high
proportion of "refined sugar."

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J. Paul Zimmer, Ph.D.
Developmental and Clinical Immunology
University of Alabama at Birmingham