title: A simple and widely applicable method for preparing homogeneous and stable quality control samples in water microbiology.
abstract: Test strains suspended in skim milk, quickly frozen in dry ice-ethanol, and stored at - 70 degrees C can be used as quality control samples that are immediately available by quickly thawing at 37 degrees C. The samples remain homogeneous and stable for at least 1 year, except for Aeromonas hydrophila, which decreases 20 to 30% in 1 year.
authors.affiliation: Laboratory of Water and Food Water Microbiology, National Institute of Environmental Protection and Public Health, 3720 BA Bilthoven, The Netherlands.
authors.forename: J F
authors.initials: JF
authors.lastname: Schijven
authors.forename: A H
authors.initials: AH
authors.lastname: Havelaar
authors.forename: M
authors.initials: M
authors.lastname: Bahar