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Bacillus anthracis Sterne 34F2 spores (selectively highlighted with red arrows) are clearly outlined in the pharynx (A), gut (B), and anus (C) of Caenorhabditis elegans N2 indicating that spores do survive ingestion by the nematode. Vegetative cells would be recognized by a more elongated shape typical of rod-shaped bacteria of the Bacillus spp. group.
