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Bacterial survival was determined in linens (i) inoculated with Staphylococcus auerus (ii), taken from hospital isolation patients' beds, and (iii) used by students in their homes. Two different washers using temperatures of 38, 49, 54 and 60 C, respectively, for different times were empolyed along with a commercial tumbler dryer. Findings, after macerating the linens in Waring blender and enumerating on nonselective media, indicate that acceptable levels of survivors can be acheived in motel and hotel linens by an 8- to 10-min wash cycle at 54 C followed by adequate drying. However, it is recommended that a wash cycle with 60 C for 10 to 13 min be employed for linens in health care factilities. The microbial significance of various laundering practices is discussed.
Walter et al. (Sat,) studied this question.