A novel Gram-stain-negative, motile by means of gliding,
and short rod-shaped bacterium, designated HS916T, was
isolated from soil polluted by sewer water in Cheonan-si,
South Korea. Growth occurred at 10–35°C (optimum 30°C),
pH 6.0–8.0 (optimum pH 7.0), and 0–1% sodium chloride
(NaCl, w/v). Based on similarities of 16S rRNA gene sequences,
strain HS916T was closely related to members of the genus
Flavobacterium, exhibiting the highest sequence similarities
with Flavobacterium glycines Gm-149T (96.4%), followed by
F. granuli Kw05T (96.3%), F. fluminis 3R17T (96.3%), F. aquicola
TMd3a3T (96.2%), and F. nitratireducens N1T (96.2%).
Phylogenetic analysis based on 16S rRNA gene sequences indicated
that strain HS916T was placed in a monophyletic cluster
with F. nitratireducens N1T and F. fluminis 3R17T. The predominant
fatty acids (> 5% of the total) of strain HS916T were
iso-C15:0, anteiso-C15:0, iso-C15:0 3-OH, C17:1 ω6с, C16:0 3-OH,
iso-C17:0 3-OH, and summed feature 3 (C16:1 ω7с and/or C16:1
ω6с). The major polar lipids of the strain comprised phosphatidylethanolamine,
unidentified aminolipids, and five unidentified
lipids. The predominant respiratory quinone and
the major polyamine were menaquinone-6 (MK-6) and symhomospermidine,
respectively. The DNA G + C content of
strain HS916T was 34.9 mol%. Based on polyphasic analyses,
strain HS916T represents a novel species belonging to the genus
Flavobacterium, for which the name Flavobacterium parvum
sp. nov. is proposed. The type strain is HS916T (= KACC
19448T = JCM 32368T).