Phylum Firmicutes, Class Bacilli, Order Lactobacillales, Family Streptococcaceae, Genus Lactococcus, Lactococcus chungangensis
Cho et al. 2008.
Description is based on a single isolate.
Gram-positive round to ovoid cells, grouped mostly in pairs or short chains. Nonmotie.
Endospores are not formed.
Colonies on GYEA plates are pinpoint, white and opaque, with a diameter of less than
0.3 mm. Facultatively anaerobic. Optimum growth at 30 ºC. Weak growth at 37 ºC. Can
grow at 4 ºC, but not at 40 ºC. Does not grow in 4% NaCl medium.
Isolated from a foam sample taken from an activated sludge wastewater treatment plant in Cheonan, Republic of Korea.
- Sung-Lim Cho, Sun-Woo Nam, Jung-Hoon Yoon, Jung-Sook Lee, Ampaitip Sukhoom, and Wonyong Kim. Lactococcus
chungangensis sp. nov., a lactic acid bacterium isolated from activated sludge foam. Int J Syst Evol Microbiol August 2008 58:
Tested in API CHL & API Strep:
Positive results for esculin hydrolysis, hippurate hydrolysis, leucine aminopeptidase, Voges–Proskauer test, acid production from:
N-acetylglucosamine, amygdalin, arbutin, cellobiose (weak), D-fructose, D-glucose, gentiobiose, D-mannose, mannitol, maltose,
salicin, starch, sucrose, trehalose (weak) & turanose (weak).
Negative results for alkaline phosphatase, arginine dihydrolase, catalase, alpha-galactosidase, beta-glucuronidase, beta-
galactosidase, oxidase, pyrrolidonyl arylamidase, acid production from: galactose, lactose, melibiose, melezitose, methyl alpha-D-
glucoside, methyl alpha-D-mannoside, raffinose & D-xylose.
(c) Costin Stoica