1. Actin tails formed by Rickettsia spp.
Actin tails formed by Rickettsia spp. Fluorescence microscopy of Rickettsia-infected Vero cells, labeled for actin (red) and Rickettsia (green). (A) Actin tails formed by spotted fever group species R. rickettsii. (B) Higher magnification of the inset from panel A, showing distinct actin bundles of the tail wrapped in a helical fashion. (C) Short hook-shaped actin tails formed by typhus group species R. typhi. (D) Absence of actin tails on typhus group species R. prowazekii. (Adapted from reference 75 with permission of the American Society for Microbiology.)‏
Marcia B. Goldberg Microbiol. Mol. Biol. Rev. 2001; doi: /MMBR