Picture of Rickettsialpox (Tâche Noire)

Rickettsialpox: tâche noire. A crusted, ulcerated papule (eschar) with a red halo resembling a cigarette burn at the site of a tick bite.
Image Source: Fitzpatrick's Color Atlas & Synopsis of Clinical Dermatology Klaus Wolff, Richard Allen Johnson, Dick Suurmond Copyright 2005, 2001, 1997, 1993 by The McGraw-Hill Companies. All Rights reserved.
Text: WebMD Medical Reference
Text: WebMD Medical Reference