Actinomyces ruminicola
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
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Phylum Actinobacteria, Class Actinobacteria, Subclass Actibacteridae, Order Actynomycetales, Suborder Actinomycinae, Family
Actinomycetaceae, Genus Actinomyces,
Actinomyces ruminicola An, Cai and Dong 2017.
Gram-positive straight rods, 0.5-1.0 x 2.5-4.0 µm. Non-motile. Non-spore-forming.
Colonies are white, slightly convex, 0.5-0.8 mm in diameter on PYRG (peptone-yeast
extract-glucose and 15% rumen fluid) agar after 48 h at 46 ºC; grow in PYRG broth.
Strictly anaerobic. Grows at: 20-55 ºC, pH 8.0-8.5.
Isolated from cattle rumen. A feature of their natural niche is xylan degradation.
Undetermined.
  1. An D, Cai S and Dong X, 2006. Actinomyces ruminicola sp. nov., isolated from cattle rumen. Int J Syst Evol Microbiol  56, 2043-
    2048.
Positive results for acid production from D-arabinose, cellobiose, cyclodextrin, erythritol,
fructose (weak reaction), galactose, glucose, lactose, maltose, melibiose, melezitose,
rhamnose, ribose, sorbitol, sucrose (saccharose), trehalose and D-xylose.

Negative results for catalase, hippurate hydrolysis,methyl red test, nitrate reduction, urease, Voges-Proskauer test, acid production
from adonitol, dulcitol, glycerol, inulin and starch (amidon).

Variable results for esculin hydrolysis, acid production from glycogen, inositol, mannose, mannitol, salicin and xylitol.
(c) Costin Stoica
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