Antifungal Activity of Nanocapsule Suspensions Containing Tea Tree Oil on the Growth of Trichophyton rubrum

Abstract

The aim of this study was to evaluate, for the first time, the antifungal efficacy of nanocapsules and nanoemulsions containing Melaleuca alternifolia essential oil (tea tree oil) in an onychomycosis model. The antifungal activity of nanostructured formulations was evaluated against Trichophyton rubrum in two different in vitro models of dermatophyte nail infection. First, nail powder was infected with T. rubrum in a 96-well plate and then treated with the formulations. After 7 and 14 days, cell viability was verified. The plate counts for the samples were 2.37, 1.45 and 1.0 log CFU mL−1 (emulsion, nanoemulsion containing tea tree oil and nanocapsules containing tea tree oil, respectively). A second model employed nails fragments which were infected with the microorganism and treated with the formulations. The diameter of fungal colony was measured. The areas obtained were 2.88 ± 2.08 mm2, 14.59 ± 2.01 mm2, 40.98 ± 2.76 mm2 and 38.72 ± 1.22 mm2 for the nanocapsules containing tea tree oil, nanoemulsion containing tea tree oil, emulsion and untreated nail, respectively. Nail infection models demonstrated the ability of the formulations to reduce T. rubrum growth, with the inclusion of oil in nanocapsules being most efficient.

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Acknowledgments

The authors thank to CNPq-Brasília/Brazil for financial support.

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Correspondence to Cristiane Bona da Silva.

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Flores, F.C., de Lima, J.A., Ribeiro, R.F. et al. Antifungal Activity of Nanocapsule Suspensions Containing Tea Tree Oil on the Growth of Trichophyton rubrum . Mycopathologia 175, 281–286 (2013). https://doi.org/10.1007/s11046-013-9622-7

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Keywords

  • Nanoemulsions
  • Nanocapsules
  • Tea tree oil
  • Trichophyton rubrum
  • Onychomycosis