Budding bacteria of the Pasteuria–Blastobacter group

Abstract

Two strains of ovoid budding bacteria have been isolated from peptone enrichment cultures from a creek and lake. The cells of both strains attach to organisms and inanimate substrata by holdfast structures located at the narrow poles of the cells and produce buds at or near the opposite, wider pole of the cell. Newly formed buds are motile by monotrichous flagella inserted at or near the wider pole of the cell. Although these strains could be included as the first isolates of either the genus Pasteuria or Blastobacter, the author has concluded that the one viable strain be regarded as the type strain of Pasteuria ramosa Metchnikoff 1888.