Aerococcus suis
Species of Gram-positive bacterium
From Wikipedia, the free encyclopedia
Aerococcus suis is a species of Gram-positive coccoid bacterium in the family Aerococcaceae. It was first isolated from a pig in Spain with meningitis and formally described in 2007.[1] A. suis is an alpha-hemolytic, catalase-negative bacterium and a potentially opportunistic pathogen of swine.
| Aerococcus suis | |
|---|---|
Scientific classification  | |
| Domain: | Bacteria |
| Kingdom: | Bacillati |
| Phylum: | Bacillota |
| Class: | Bacilli |
| Order: | Lactobacillales |
| Family: | Aerococcaceae |
| Genus: | Aerococcus |
| Species: | A. suis |
| Binomial name | |
| Aerococcus suis Vela et al., 2007 | |
Taxonomy
Aerococcus suis was described by Vela et al. in 2007 based on isolates from pigs with clinical infections in Spain.[1] The species name is derived from the Latin word suis, meaning "of a pig." The type strain is 1821/02T (= CECT 7139T = CCUG 52530T = DSM 21500T). It is phylogenetically related to Aerococcus viridans and Aerococcus urinaeequi, but differs from them based on 16S rRNA gene sequence (<96% similarity), phenotypic traits, and biochemical profiles.
An emended description of the species was published in 2014 to clarify phenotypic characteristics and differentiate it from other species within the genus.[2]
Morphology
Aerococcus suis cells are Gram-positive, spherical cocci that typically form tetrads or clusters. Colonies on blood agar are small (<1 mm), non-pigmented, and display alpha-hemolysis after 24 hours at 37 °C. The species is non-motile, non-spore-forming, and catalase- and oxidase-negative. It is facultatively anaerobic and tolerates 6.5% NaCl and pH 9.6.