This genus may be associated with MCS (see this post). High levels are seen with Irritable bowel syndrome patients negative for Blastocystis carriage .
For updated information see Microbiome Prescription
There are just 20 citations on PubMed.
- “At the genus level, there were declines in Christensenella, Gordonibacter and Anaerotruncus in the florfenicol group” 
- “Pomegranate polyphenols enhanced urolithin and propionate production, as well as Akkermansia and Gordonibacter prevalence with the highest effect in the descending colon”  
- “Walnuts act like pomegrantes” 
- “In vitro susceptibilities to penicillin, metronidazole, vancomycin, and amoxicillin-clavulanate were determined using the Etest method….The fever gradually subsided after 3 days of amoxicillin-clavulanate, and the patient’s general condition gradually improved. ”