<研究報告>家庭洗濯の衛生学的研究 : 洗浄後附着している大腸菌

概要

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The purpose of this study is to examine the hygienic condition of cotton cloth washed and dried, which was purposely contaminated. The dryness of cloth is determined from the amount of water it absorbed. The most probable number of Escherichia-coli is detected by Homma's modified method. 1) Cotton cloth soiled with excrement, washed with soap and water, and squeezed, has a large number of Escherichia-coli still attached to it, but when the humidity of the cloth is less than 2%, it is found, neither under the direct rays of the sun nor indoors, with the bacilli. 2) Escherichia-coli on the washed cotton cloth can be destroyed by hot ironing even while the cloth is considerably wet. 3) In the experiment, two kinds of diapers, cotton and teviron, are purposely contaminated and washed ; the latter is found less with the germs than the former. 4) The cotton cloth, when washed with the indicated amount of a certain detergent with surface active agent and sodium hypochlorite, is found without the bacilli. 5) Diaper-covers are not readily rendered without Escherichia-coli by mere washing, because the covers are structurally and materially hard to be dried.
福岡女子大学の論文
1961-03-25