Experimental formation of "corn cob" in vitro.

Organisms isolated from corn cob were examined for aggregation with Bacterionema matruchotti. Such aggregations, interpreted as corn cob formation, in vitro, occurred with five isolated identified as Streptococcus sanguis. A cell-surface component of Streptococcus sanguis or a phospholipid-related substance of Bacterionema matruchotii appeared to be involved.