| First, with respect to virion structure, the virions of both evolved from an icosahedral symmetry to a reniform or bacilliform shape. |
| The particles of the virus are in general bacilliform, but bullet-shaped particles also occur. |
| If, however, all the larger diameter microbes are only 2-3 m long, they should be treated as bacilliform microbes rather than filamentous microbes. |
| In this article, we have developed a general geometrical model to describe the structure of prolate or bacilliform capsids. |
| Clusters of corkscrew-shaped, bacilliform organisms, consistent with Helicobacter heilmannii, were seen in these gastric pits. |
| The virus had 30 x 150 nm non-enveloped bacilliform particles typical of badnaviruses. |
