Exothrix refers to Dermatophyte infections of the hair that infect the hair surface. This is in contrast to Endothrix, where a Dermatophyte mainly invades the hair shaft. Using an ultraviolet Wood's lamp, endothrix infections will not fluoresce whereas exothrix infections will.
References
- Penzer, R.; Ersser, S. (2010). Principles of Skin Care: A Guide for Nurses and Health Care Practitioners. Wiley. p. 233. ISBN 978-1-4443-1981-1. Retrieved 2022-07-11.