First record of the rare species Aeromonas schubertii from mussels: phenotypic and genetic reevaluation of the species and a review of the literature
In a study where the prevalence of Aeromonas in shellfish was analysed, three isolates of Aeromonas schubertii were identified, representing this the first report of this species from mussels. This species was originally described in 1988 from strains isolated from extra-intestinal human infections...
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Veröffentlicht in: | Archives of microbiology 2016-05, Vol.198 (4), p.333-345 |
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Zusammenfassung: | In a study where the prevalence of
Aeromonas
in shellfish was analysed, three isolates of
Aeromonas schubertii
were identified, representing this the first report of this species from mussels. This species was originally described in 1988 from strains isolated from extra-intestinal human infections and since then has been cited in only 18 occasions. For many years,
A. schubertii
was the only mannitol-negative species of the genus. However, three additional mannitol-negative species (
Aeromonas simiae
,
Aeromonas diversa
and
Aeromonas australiensis
) have been described. This, together with the fact that
A. schubertii
is a rare human pathogenic species, motivated the present study to characterize its biochemical behaviour and differentiation from the other mannitol-negative species. The molecular similarity (16S rRNA,
rpoD
and
gyrB
genes) of the strains, presence of virulence genes and antimicrobial resistance were determined. All
A. schubertii
strains showed the same phenotypic behaviour, i.e. they use citrate, are positive for lysine decarboxylase and
dl
-lactate, but negative for production of mannitol, indole and acid from sucrose and could be easily differentiated from other mannitol-negative species. All strains carried the
aerA
and
lafA
virulence genes and showed susceptibility to all antibiotics tested. Seafood could be a transmission route of this bacterium to humans. |
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ISSN: | 0302-8933 1432-072X |
DOI: | 10.1007/s00203-016-1189-5 |