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. 2002 Oct;8(10):1060–1065. doi: 10.3201/eid0810.020392

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Direct fluorescent-antibody (DFA) staining of Bacillus anthracis cells. Panel A (cell wall DFA) and Panel B (capsule DFA) correspond to 1) Positive control (B. anthracis Pasteur strain), 2) Test isolate #2002013601 (environmental specimen, 2001 U.S. anthrax outbreak), and 3) Clinical specimen #2002007069 (lung tissue of patient 1, 2001 U.S. anthrax outbreak), original magnification x 400.