In fact , participants with butyrate > @ mmol/kg of wet feces had a mean butyrate reduction of @ @ % and a concomitant decrease in the sum of @ Clostridiales genera , namely Faecalibacterium , Blautia , Anaerostipes , Pseudobutyrivibrio , Clostridium , and Butyrivibrio ( P = @ ) , after the probiotic intervention .