Evaluation of donor skin disinfection methods

Area of Science:

• Microbiology
• Infectious Disease Prevention
• Healthcare-Associated Infections

Background:

• Bacterial contamination of platelet concentrates is a significant risk.
• Contaminants often originate from the donor's skin.
• Effective skin disinfection is crucial to minimize transfusion-related infections.

Purpose of the Study:

• To compare the efficacy of four skin disinfection methods for blood donors.
• To identify optimal disinfection protocols for reducing bacterial contamination.
• To evaluate alternatives for donors with iodine allergies.

Main Methods:

• A comparative study using contact plates for antecubital skin cultures.
• Four disinfection methods were tested: standard povidone-iodine, isopropyl alcohol/iodine tincture, green soap/isopropyl alcohol, and chlorhexidine gluconate/isopropyl alcohol.
• Bacterial colony counts were assessed pre- and post-disinfection.

Main Results:

• Isopropyl alcohol with iodine tincture showed significantly lower bacterial growth than the standard povidone-iodine method (p < 0.001).
• The green soap and isopropyl alcohol method resulted in significantly higher bacterial growth (p < 0.001).
• Chlorhexidine gluconate with isopropyl alcohol demonstrated comparable efficacy to the standard method (p > 0.3).

Conclusions:

• Isopropyl alcohol followed by iodine tincture is a more effective skin disinfection method than standard povidone-iodine.
• For donors allergic to iodine, chlorhexidine gluconate and isopropyl alcohol is a superior alternative to green soap and isopropyl alcohol.