Best practices highlighted to prevent infections during healthcare laundry process

"We asked the question if current industrial laundry processes are sufficient to interrupt patient-to-patient transmission via clean healthcare textiles (HCT). The evidence we examined suggests this is indeed the case; we found no evidence of microbial carry-over from one patient to the next for patient-care textiles when proper textile management and laundering specifications were used " said Lynne Sehulster, PhD, an infectious disease epidemiologist at the Centers for Disease Control and Prevention, and lead author..

Outbreaks of infectious disease associated with laundered HCT are rare: only 12 such outbreaks have been reported worldwide in the past four decades. Analyses have identified inadvertent exposure of clean HCTs to environmental contamination, including exposure to dust in storage areas, or a process failure during laundering.

"Current infection prevention strategies for laundering and handling HCT appear to be adequate in preventing healthcare-associated infections, provided that every step is taken to maintain the hygienic quality of HCTs prior to use. However, if an outbreak occurs linked to HCT, it is not enough to conduct microbial sampling of laundered textiles and declare the laundry process to be the source of the problem. Each of the distinct operations of the laundry-handling process needs to be evaluated in order to pinpoint the root of the problem. Our review was limited to clean HCT from laundries. We did not address contamination that occurs while the HCT are in use. That's a topic for future study," said Sehulster.

Recommendations on optimal infection-prevention strategies used during the laundering process of HCT include:

• Adherence to Standard Precautions (gown and gloves) and minimal textile agitation when handling contaminated laundry in isolation rooms are considered sufficient to prevent the dispersal of potentially infectious aerosols.
• Offsite laundries should carefully package or cover clean textile bundles prior to transport to prevent inadvertent contamination from dust and dirt during loading and unloading.
• Laundered HCT must be stored in a manner to keep them dry and free from soil contamination.
• If alterations occur in water temperature, agitation, chemical type and concentration, and duration of laundering cycle, the addition of a disinfecting laundry chemical can compensate for the anticipated loss of antimicrobial effectiveness of the overall process.
• Laundry additives, such as hydrogen peroxide, peracetic acid and acetic acid, can provide extra disinfection options for short wash cycles of HCT or for those laundry situations in which chlorine bleach is not indicated.
• Industrial laundering offers more control of the process and can be tailored to adequately disinfect HCT with more choices of detergent and laundry additives compared to home laundering.
• The importance of temperature, relative humidity, and moisture control in storage areas is central to preventing microbial proliferation in and on materials that have some organic components.

As new technology and treatments (such as antimicrobial treatments of healthcare textiles) emerge, Sehulster recommends further research on the development of laundry processing in addition to current operations. "Studies are needed to demonstrate an impact on healthcare-associated infection incidence and increased patient safety in a cost-effective manner," Sehulster said.