Actinobacillus rossii
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Proteobacteria, Class Gammaproteobacteria, Order Pasteurellales, Family Pasteurellaceae, Genus Actinobacillus,  
Actinobacillus rossii  
Sneath and Stevens 1990.
Synonyms: group “Ross” (Kilian and Frederiksen, 1981), Phenon 17 (Sneath and Stevens, 1985).
Gram-negative small bacilli or coccobacilli , nonmotile.
Colonies are semitransparent ,  grayish on sheep blood agar, and about 2 mm in
diameter after 48 hours at 37 ºC, occasionally producing weak hemolysis.
Growth is aerobic and facultatively anaerobic. Growth on MacConkey agar is variable.
V-factor independent growth. Mesophilic.
Isolated from vaginal exudate, aborted piglets, tonsils, lungs, liver, intestines, bone and brain of pigs.
Unknown.
  1. Olsen I., Moller K., 2004. Genus II. Actinobacillus. In:  Bergey’s Manual of Systematic Bacteriology, Second edition,Vol two, part B,
    George M. Garrity (Editor-in-Chief), pp. 866-883.
  2. W.M. Janda, R. Mutters, 2006. Pasteurella, Mannheimia, Actinobacillus, Eikenella, Kingella, Capnocytophaga, and other
    miscellaneous Gram-negative rods. In: Topley & Wilson’s Microbiology and Microbial Infections, 10 edition, Vol. 2, Bacteriology,
    Edward Arnold Ltd.
  3. .J. G.Holt et al., 1994. Begey’s Manual of Determinative Bacteriology, 9-edition, Williams & Wilkins.
  4. Christensen H), Kuhnert P., Bisgaard M., Mutters R., Dziva F. & Olsen J.E.: Emended description of porcine [Pasteurella]
    aerogenes, [Pasteurella] mairii and [Actinobacillus] rossii. Int. J. Syst. Evol. Microbiol., 2005, 55, 209-223.
Nitrates reduction, oxidase, alkaline phosphatase, catalase, urease, acid from D(+)
glucose, L(+) arabinose,  glycerol, D(+) xylose, meso-inositol, mannitol, D(-) sorbitol,
D(-) fructose, L(-) fucose & D(+) galactose are positive.

Gelatinase, H2S, Voges-Proskauer reaction, arginine dehydrolase, lysine
decarboxylase, ornithine decarboxylase, indole, dulcitol, L(-) sorbose, cellobiose,
melibiose, sucrose (saccharose), trehalose, xylitol,  inulin, esculin, salicin & α-
glucosidase (PNPG) are negative.
D(+)arabinose, gas from D(+) glucose, acid from D(+) mannose, L(+) rhamnose, lactose, maltose, raffinose, dextrin & ONPG reaction
are variable.
(c) Costin Stoica
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