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Morphology of non-purified spores of Clostridium botulinum CB11/1-1. CB11/1-1 spores show a morphology reminiscent of both Beluga and Eklund 17B morphologies. (A) CB11/1-1 spore displaying both appendages (white arrow) and exosporium (black arrow). (B) The morphologic scheme of CB11/1-1 spore: Cr, core; Cx, cortex; Co, coat; Exp, exosporium; and App, appendages.
