Abstract
Copper oxide (CuO) has broad-spectrum anti-microbial and anti-fungal properties. The aim of this study was to test the acaricidal efficacy of CuO-impregnated fabrics on the common house dust mite, Dermatophagoides farinae. The overall vitality/mobility of the mites was reduced when they were exposed to the CuO-impregnated fabrics and, when possible, the dust mites migrated to fabrics where no CuO was present. The mortality of mites exposed for 10 days to fabrics containing 0.2% (w/w) CuO was significantly higher than the mortality of mites on control fabrics (72 ± 4 and 18.9 ± 0.3%, respectively). The mortality reached 95.4 and 100% with fabrics containing 0.4 and 2% CuO after 47 and 5 days, respectively. The acaricidal effect of copper oxide seems to be due to direct toxicity. The use of fabrics containing copper oxide may thus be an important avenue for reducing house dust mite populations, and for reducing the load of dust mite allergens.
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