Microbial penetration of sterile packs was studied by using double-wrap (two layers each) muslin, single-wrap (two layers) muslin inner covering with single-wrap (one layer) two-way crepe paper outer covering, and single-wrap (two layers) muslin inner covering with single-layer BAR-BAC wrappers to wrap 20 gauze sponges (2 by 2 in.). These packs were stored on open shelves of a central sterile supply department of a hospital and processed for sterility at weekly intervals. Microorganisms penetrated the double-wrap muslin as early as 28 days, the single-wrap muslin and single-wrap two-way crepe paper combination in 77 days, and the single-wrap muslin and single-layer BAR-BAC combination in 63 days.
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机译：通过使用双层（每层两层）平纹细布，单层（两层）平纹薄纱布内衬，单层（一层）双向皱纹纸外壳和单层（两层）平纹细布内层覆盖物，用单层BAR-BAC包装纸包裹20条纱布海绵（2 x 2英寸）。这些包装存放在医院中央无菌供应部门的开放式架子上，并每周进行灭菌处理。微生物在28天之内就渗透了双层棉布，单层棉布和单层双向皱纹纸组合的渗透时间为77天，单层棉布和单层BAR-BAC组合的渗透时间为63天。
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