Page 33 - School Infection Control Handbook - 2010

Chapter 3: Development of Protocols
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x Home or coin-operated machines:
ƒ Water-to-fabric ratio is about 10:1 (w/w).
ƒ Dosage instructions will be different for front-loading
automatics (e.g., 8- to 10-gallon water capacity) and for
top-loading automatics and wringer-type washers (e.g.,
12- to 15-gallon water capacity).
x Industrial laundering operations:
ƒ Water-to-fabric ratio is about 5:1 (w/w).
ƒ Dosage instructions for industrial laundering may be
based on pounds of dry fabric.
ƒ Sponges and dishcloths are not recommended due to the cross-contamination
risk and the fact that they can provide an ideal medium for microbial growth.
The findings of a study by the University of Arizona on bacteria that were
found on cellulose sponges and dishcloths concluded that these items may be
an important source of bacterial contamination of surfaces, hands, and foods
in home kitchens.7 Options to address this issue include the use of
x Microwave oven heat for decontamination. Microwave heat has been
reported to be an efficient method for decontaminating cellulose
sponges and cotton dishcloths and for preventing cross-contamination
of other food-contact surfaces. Research found that exposures of 60
seconds in a common household microwave oven on the highest
settings were sufficient to kill bacteria.8 Caution is advised, however,
because the sponge or dishcloth will be extremely hot after
microwaving.
x Microfiber cloths as an alternative to sponges. Microfiber cloths are an
ideal substitute for sponges due to their ability to remove microbes and
the conditions they need to thrive and to inhibit microbial growth
within their fibers. See Chapter 6.C. Using Microfiber Cloths and
Mops for Infection Control.
Consider the Surface Before, During, and After Disinfecting
1. Compatibility of product with surface – Always check the product label for compatibility
because some products can permanently damage surfaces, such as the use of bleach on a
metal surface.
2. Orientation of surface (horizontal or vertical) – Consider what application process and
equipment would work the best to keep the surface wet long enough to meet the required
contact time period.
3. Final treatment of the surface: rinsed, wiped off, or air dried – Always read labels for
instructions. Several issues to consider when determining whether to rinse off the
disinfectant or sanitizer: