(Originally from the English Wikipedia, where it was uploaded by TenOfAllTrades)

Gram stained cerebrospinal fluid showing gram-positive anthrax baccilli (purple rods).

Image originally appeared in

John A. Jernigan, David S. Stephens, David A. Ashford, Carlos Omenaca, Martin S. Topiel, Mark Galbraith, Michael Tapper, Tamara L. Fisk, Sherif Zaki, Tanja Popovic, Richard F. Meyer, Conrad P. Quinn, Scott A. Harper, Scott K. Fridkin, James J. Sejvar, Colin W. Shepard, Michelle McConnell, Jeannette Guarner, Wun-Ju Shieh, Jean M. Malecki, Julie L. Gerberding, James M. Hughes, Bradley A. Perkins, and members of the Anthrax Bioterrorism Investigation Team. "Bioterrorism-Related Inhalational Anthrax: The First 10 Cases Reported in the United States". Emerging Infectious Diseases (Internet serial), 7(6), December 2001.

Accessed 19:15, 8 Mar 2005 (UTC) via [1].

Reproduction of this image is permitted as long as the source is credited.

Note: although this image is labeled here, and even described in the original publication as a Gram stain, it clearly is a Wright stain rather than a Gram stain; the white cell nuclei stain blue with a Wright stain, but pink with Gram's. Both are commonly used on CSF.

This image is a work of the Centers for Disease Control and Prevention, part of the United States Department of Health and Human Services, taken or made as part of an employee's official duties. As a work of the U.S. federal government, the image is in the public domain.