Journal ArticleDOI
Medium volume and the survival of Serratia marcescens.
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TLDR
Experiments were designed to test the null hypothesis that volume of agar medium in 100 mm Petri dishes has no influence on the colony count of the facultative organism, Serratia marcescens, and the surface counts were statistically equivalent but the subsurface counts increased as a direct function of volume variation.Abstract:
Summary
Experiments were designed to test the null hypothesis that volume of agar medium in 100 mm Petri dishes has no influence on the colony count of the facultative organism, Serratia marcescens. With a constant inoculum in 9, 12, 15 and 18 ml volume of medium the surface counts were statistically equivalent, but the subsurface counts increased as a direct function of volume variation. Over the range studied, at the P= 0.95 level, the null hypothesis was accepted for surface colony counts but was rejected for subsurface colony counts.read more
References
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Incidence and kinds of microorganisms associated with commercially dressed poultry.
Homer W. Walker,John C. Ayres +1 more
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A Proposed Method for Control of Food Utensil Sanitation.
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Evaluation of disinfectants for hospital housekeeping use.
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The inhibiting effect of serine upon the growth of the indigenous flora of cream filling.
TL;DR: The milk was used instead of distilled water because the plating of control fillings revealed that, although an uncountable number of colonies appeared on the 10-4 plate, the expected number did not appear on the10-5 plate, and the expected decimal sequence was obtained, however, with the milk diluent.
Journal ArticleDOI
Statistical analysis of standard plate counts of a food sample split among laboratories
TL;DR: In this paper, one-gram samples of kitchen-contaminated egg salad were analyzed in nine public health laboratories on three successive days, and the major sources of variation both between and within laboratories were identified.
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