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Phylum Actinobacteria, Class Actinobacteria , Subclass Actibacteridae, Order Actynomycetales, Suborder Corynebacterinae, Family
Corynebacteriaceae, Genus Corynebacterium,
Corynebacterium lactis  Wiertz, Schulz, Müller, Kämpfer and Lipski 2013.
Gram-positive pleomorphic short rods, 1.0-1.6 x 0.6-0.8 µm. Non-spore-forming.
Non-motile. Tuberculostearic acid is absent. Mycolic acids are not present.
Colonies on TSA after 3 days of incubation under aerobic conditions at 30 ºC are
about 2 mm in diameter, white, white, with uneven edge and dry. On Columbia blood
agar colonies are about 4 mm in diameter, white, with uneven edge and dry.
Non-haemolytic. Can grow at 42 ºC, but not at 20 ºC.
Isolated from raw cow’s milk produced  in Germany.
Undetermined.
  1. Wiertz R., Schulz S.C., Muller U., Kampfer P. and Lipski A., 2013. Corynebacterium frankenforstense sp. nov. and
    Corynebacterium lactis sp. nov., isolated from raw cow milk. IJSEM 63, 4495-4501.
Most biochemical reactions were determined by API Coryne, API 50CH, and API ZYM.
Fermentative metabolism.

Positive results for catalase, pyrazinamidase, acid production from: fructose, glucose
at 42 ºC and 37 ºC, mannose & ribose.

Negative results for beta-galactosidase, gelatin hydrolysis, alpha- or beta-glucosidase, N-acetyl-beta-glucosaminidase, lipase (C14),
nitrate reduction, oxidase, starch hydrolysis, urease, acid production from: adonitol, amygdalin, L- or D-arabinose, D-arabitol, arbutin,
N-acetyl-glucosamine, cellobiose, dulcitol, erythritol, fucose, galactose, gentiobiose, gluconate, 2 or 5-ketogluconate, glycogen,
inositol, inulin, lactose, lyxose, maltose, mannitol, melezitose, melibiose, raffinose, rhamnose, sorbitol, sorbose, starch, tagatose,
turanose, xylitol & xylose.

Variable results for alkaline phosphatase, acid phosphatase, esterase lipase, beta-glucuronidase, acid production from: galactose,
sucrose & trehalose.
Corynebacterium lactis
(c) Costin Stoica
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