This is the latest discovery of an unusual probiotic, it is used for acute adult diarrhea. Availability is in Germany (unfortunately Amazon.de does not carry it). On line German pharmacies do, for example at this site.
What do we know about it? There are 13 PubMed articles:
- “Probiotic enterococci a widely used by pediatricians and infection diseases doctors in Russia as means for the treatment of dysbiosis, irritated bowel syndrome and in the treatment and prevention of different functional and chronic intestinal diseases. Strains E. faecium M74 and E. faecium SF-68 are included in several probiotic drugs and have been proved as effective and safe.” 
- “Enterococcus faecium SF 68 (sensitive to penicillin, tetracycline, virginiamicin and tylosin, but resistant to streptomycin)” 
- “An antagonistic activity of Enterococcus faecium SF 68 towards Plesiomonas shigelloides, Aeromonas sp., enteropathogenic Escherichia coli and Yersinia enterocolitica has been studied and demonstrated.’ 
- “All treatments were continued for 7 days. Enterococcus SF 68 was shown to be effective in reducing the incidence of antibiotic-associated diarrhoea in comparison with placebo (8.7% compared with 27.2%, respectively). Patients with acute enteritis showed a significantly faster resolution of bowel abnormalities during treatment with Enterococcus SF68 compared with placebo.” 
NOTE: It appears to be available in the US as a probiotic for dogs — “FORTIFLORA® CANINE NUTRITIONAL SUPPLEMENT”