Suzanne:

   mary rose tully discusses in her book the matter of freezing milk and
thrush... unfortunately yes there can be reinfection... the choices are...
know this and plan to use the milk when imunne system is in  good form... for
warned is for armed... it is very difficult to pitch milk that has been
worked so hard for so that it may be worth knowing the possibily is there and
acting appropriately. heating will kill so mom may want to heat milk a tad
warmer than she would normally... i do not recall what temp kills but is is
not very hot....

                      Patricia