Sometimes they do. While the exact mechanism for the development of this property is not yet known, it has been demonstrated that many filaments associated with Bovine Digital Dermatitis also fluoresce under UV exposure.u003cbr/u003eu003cimg alt=u0022Fluorescent Morgellons fiberu0022 src=u0022https://www.morgellonssurvey.org/wp-content/uploads/2021/07/download-2.gifu0022/u003eu003cbr/u003eFigure 2H: Striking iridescence of a red fiber from Case 1 (100x magnification).u003cbr/u003e(u003ca href=u0022https://www.longdom.org/open-access/morgellons-disease-a-chemical-and-light-microscopic-study-2155-9554.1000140.pdfu0022 target=u0022_blanku0022 rel=u0022noreferrer noopeneru0022u003eMorgellons Disease: A Chemical and Light Microscopic Study (longdom.org)u003c/au003e)