Compositions comprising bacterial strains

A method of treatment of cancer in a subject in need thereof, comprising:

• administering to the subject a therapeutically effective amount of a pharmaceutical composition that comprises:
• a bacteria strain with a 16s rRNA gene sequence with at least 99.5% sequence identity to the polynucleotide of SEQ ID NO:2, wherein the sequence identity is determined by the Smith-Waterman homology search algorithm using an affine gap search with a gap open penalty of 12 and a gap extension penalty of 2, and a BLOSUM matrix of 62;
• wherein said bacteria strain has a carbohydrate fermentation profile that comprises:
• (i) a positive fermentation of at least one of:
• L-arabinose and D-xylose;
• and (ii) an intermediate fermentation of Methyl-αD-glycopyranoside;
• wherein said bacteria strain is present in an amount sufficient for treatment of cancer in the subject, and wherein the cancer is a solid tumor cancer.