Kay Hoover's 4 page handout titled, "The Link Between Infants' Oral Thrush
and Nipple/Breast Pain in Lactating Women," dated 8/96, states:

"Freezing does not kill yeast, so feed the baby any milk collected during
the yeast infection within 24 hours of pumping.  If breastmilk has been
stored in the freezer during a bout with yeast, it could be brought to a
boil to kill the yeast."

She cites Rosa C. et al. Yeasts from human milk collected in Rio de
Janeiro, Brazil.  Rev Microbiol 21(4):361-363, 1990.

By the way, I find this a very helpful handout.  Two pages are color photos
of oral thrush, nipple thrush, yeast diaper rash, how to use oral and
topical nystatin and gentian violet, other remedies such as handwashing,
doing laundry in hot water and hanging it out in the sun to dry, etc.
There are also two pages of clear and detailed written instructions.  I
think the pictures help mothers understand better just how to deal with
this frustrating problem.
Available from Kay Hoover, IBCLC, 613 Yale Ave, Morton, PA 19070-1922
phone and fax (610)543-5995  She gives permission to photocopy it.

Anne Altshuler, RN, MS, IBCLC and LLL leader in Madison, WI
e-mail address:  [log in to unmask]