Examples of secondary etiology are those things that, by definition, cause microbic plaque accumulation, such as restoration overhangs and
Kaynak: Periodontitis

Also, it can be triggered by C-Reactive Protein binding to microbic polysaccharides such as phosphocholine. C1 and its subunits
Kaynak: Classical complement pathway

clouds; and the only traces of life they find are fossilized remains of microbic bacteria similar to those recovered from Martian meteorites .
Kaynak: Titan (Stephen Baxter novel)