- endoderm absent
Animals lack the early blast cells that give rise to the gut tissue (Wormatlas).
- gut Enterobacteriaceae bloom
Animals exhibit a greater abundance of bacteria of the Enterobacteriaceae family in the gut, compared to controls.
- bacterial load in gut variant
Animals exhibit variations in the load of bacteria, of a particular clade or in general, in the gut, compared to controls.
- defecation variant
Animals exhibit variations in the processes involved in eliminating gut contents compared to control animals. In C. elegans the sequence of events during defecation includes posterior body contraction (pBoc), relaxation, anterior body contraction (aBoc), expulsion of gut contents by enteric muscle contraction (Emc) and opening of anus (Exp), and intercycle period (Wormatlas).
- expulsion infrequent
The final step of the defecation motor program does not occur at each cycle, but is activated occasionally. During this step in C. elegans specialized enteric muscles contract to expel the contents of the gut through the anus.
- defecation contraction variant
Any variation in the stereotyped muscle contractions that result in defecation compared to control . In C. elegans these contractions include posterior body contraction (pBoc), anterior body contraction (aBoc), expulsion of gut contents by enteric muscle contraction (Emc) and opening of anus (Exp).
- expulsion defective
Animals exhibit defects in the expulsion of gut contents. In C. elegans, this refers to the final step of the defecation cycle in which the intestinal muscle and anal depressor contractions further pressurize intestinal contents and open the anus to permit expulsion.
- proctodeum morphology variant
Animals exhibit variations in the structure and organization of the chamber in the male tail that extends from the termination of four canals (vas deferens, gut, and left and right spicule channels) to just before the cloaca, from that observed in control animals.
- defecation missing motor steps
Animals lack one or more of the stereotyped muscle contractions that result in defecation compared to control. In C. elegans these contractions include posterior body contraction (pBoc), anterior body contraction (aBoc), expulsion of gut contents by enteric muscle contraction (Emc) and opening of anus (Exp).