I'm a bit behind in reading but wanted to be sure that the question asked about yeast and milk storage was addressed. Yeast CAN survive in refrigerated milk as well as FROZEN milk. One way to address it during treatment is to boil the milk (and cool of course) before feeding it to baby. The reference is Rosa C et al: Yeasts from human milk collected in Rio de Janeiro, Brazil. Rev Microbiol 21(4):361-363, 1990. Mary Kay Smith, CLE, IBCLC Romeoville, IL near chicago