Proposal of new combination, Cutibacterium acnes subsp. elongatum comb. nov., and emended descriptions of the genus Cutibacterium, Cutibacterium acnes subsp. acnes and Cutibacterium acnes subsp. defendens
2019
In 2016, division of the genus
Propionibacterium
into four distinct genera was proposed. As a consequence, the species
Propionibacterium acnes
was transferred to
Cutibacterium
gen. nov. as
Cutibacterium acnes
comb. nov. The three recently proposed subspecies of
P. acnes
were not, however, accommodated in this proposal. Following a very recent validation of a new combination for
C. acnes
subsp.
defendens
and an automatically created
C. acnes
subsp.
acnes
, we now propose the new combination,
C. acnes
subsp. elongatum comb. nov. The type strain of
Cutibacterium acnes
subsp. elongatum is JCM 18919T (=NCTC 13655T). On the basis of further genomic and phenotypic (haemolysis and MALDI-TOF mass spectrometry) analyses of these subspecies, we also provide emended descriptions of the genus
Cutibacterium
Scholz and Kilian 2016,
C. acnes
subsp.
acnes
(Gilchrist 1900) Nouioui et al. 2018, and
C. acnes
subsp.
defendens
(McDowell et al. 2016) Nouioui et al. 2018.
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