Can you access it thru these links maybe?:
https://www.ncbi.nlm.nih.gov/pubmed/26828918
https://www.researchgate.net/publication/292590776_Gut_microbiota_in_2015_Prevotella_in_the_gut_Choose_carefully
don’t know if that helps, or this 2016 article that references the original as source material:
https://www.gutmicrobiotaforhealth.com/the-latest-advances-regarding-the-link-between-prevotella-genus-diet-and-its-impact-on-host-health/