Classification Changes and Nomenclature Updates
Several nomenclature updates have occurred since 2000. The first
and most significant of these involves the genus Salmonella. Opinion
80 rendered by the Judicial Commission resolves issues surrounding
Salmonella nomenclature with the decision that only
Salmonella enterica retains species status (16). Serovars, such as
Enteritidis, Typhimurium, and Typhi, no longer have species status
and therefore are not italicized in laboratory reports or publications
but rather are capitalized. Another nomenclature update
includes the fact that the human pathogens Vibrio carchariae and Vibrio
trachuri are later heterotypic synonyms of Vibrio harveyi. Nomenclature
issues concerning the species status of Aeromonas aquariorum
have also arisen. The species was first proposed in 2008 (Table 1),
but almost from its inception, contradictory phylogenetic evidence
was found that questioned its validity as a separate species
(17). However, the most recent polyphasic data now support reclassification
of this group into the species Aeromonas dhakensis (18).