Acetic acid bacteria (AAB) have undergone continuous taxonomic
revision, resulting in an increased number of genera and species
ascribed to this group. Thus, the description of the most common AAB in
grapes, must and wine has changed dramatically since the initial
assessments, which were primarily based on physiological methods. In
the present study, we identified the AAB isolated from different grape
musts by sequencing the 16S rRNA gene and 16S-23S rRNA gene internal
transcribed spacer region. We had previously performed studies from
the same winery. However, in this study we now identified AAB species
that have been recently described in wines, as well as others that were
identified for first time in this niche. Gluconobacter cerinus, G. japonicus,
G. thailandicus and G. oxydans were previously identified as G. oxydans.
Kozakia baliensis was also within this group. Acetobacter pasteurianus,
A. cerevisiae and A. malorum were formerly grouped as Acetobacter
sp. Many isolates previously described as G. oxydans or A. aceti likely correspond
to other, newly described species of the same genera.