Antidermatophytic Effect of Black Walnut hull, Juglans nigra

King, Rosanna, Andrea Lutac, Natalie Rubio, Jenna Yutzy, and Rebecca Rashid Achterman.
Bastyr University, Kenmore, WA.

(Presented at The Future of Ginseng and Forest Botanicals Symposium, July 12-14, 2017, Morgantown, WV)

Abstract

Athlete’s foot, ringworm, jock itch and fungal nail infections are all caused by dermatophytes, making dermatophytosis the most common type of fungal infection. More than $500 million is spent worldwide to treat these fungal infections. Juglans nigra has a long history of use by herbalists in the treatment of fungal infections. Several studies have been published on the antifungal activity of the related Juglans regia, which is used in Europe and Asia, but little research has been published exploring anti-fungal effects of J. nigra, which is endemic to eastern North America and preferred by American herbalists. Fresh and dry black walnut hull preparations are used with the fresh often considered more potent than the dry hull. The objective of this project was to investigate the difference in anti-dermatophyte activity of fresh and dry ethanolic, aqueous, and glycerin extracts of black walnut hull.