Provided are compositions comprising a bacterial strain of the genus Blautia, for use in a method of increasing the microbiota diversity and/or inducing stability of the microbiota of a subject.本文提供了包含布勞特氏菌屬之細菌品系之組合物,其用於增加受試者之微生物區多樣性及/或誘導微生物區之穩定性的方法中。