Because the pump inhales and exhales air over this debris, it > could certainly re-seed freshly pumped milk with blown down bacteria, > fungus, or virus . The Ameda/Hollister pumps use a different way of vacuum management. In these pumps vacuum is increased by enlarging the volume of the container and breastshield. This system is used on both manual and electric pumps. There really can be no air nor fluid contact between the motor and the container/shield. So I think there is very little to no chance of contamination of the motor and/or mechanical parts. Gonneke van Veldhuizen, IBCLC, living in Maaseik, Belgium http://www.users.skynet.be/eurolac [log in to unmask] *********************************************** The LACTNET mailing list is powered by L-Soft's renowned LISTSERV(R) list management software together with L-Soft's LSMTP(TM) mailer for lightning fast mail delivery. For more information, go to: http://www.lsoft.com/LISTSERV-powered.html