Fig. 3: Scanning electron micrographs visualizing the cell morphology of enriched archaeal cultures and co-enriched background bacteria.

A enrichment culture P86, predominated by M. smithii. B enrichment culture P89, predominated by Cand. M. intestini. C enrichment culture P31, predominated by M. smithii. D enrichment culture P51, presence of Cand. M. intestini. E enrichment culture P86 (MS + B.t.), predominated by Cand. M. intestini, enlarged for better visibility of different cell phenotypes. Some rods appear bloated (arrows).