Phylum Proteobacteria, Class Gammaproteobacteria, Order Pseudomonadales, Family Moraxellaceae, Genus Moraxella, Moraxella
lincolnii Vandamme et al. 1993.
Gram-negative, coccus-like to plump rods 1 to 1.5 μm wide and 1.5 to 2.5 μm long.
Colonies are whitish, smooth, convex, and circular and have a diameter of 1 to 3 mm
after 2 days incubation. Some strains may produce colonies with a flattened edge.
Nonhemolytic and nonpigmented. Grows under aerobic, capnophilic, or microaerobic
conditions but not anaerobically. Optimal growth occurs at 28 to 33 ºC. No growth at
42 ºC. Growth occurs in the absence of NaCl; no growth occurs in the presence of
1.5% NaCl. Grows on blood agar or nutrient agar, but not on MacConkey or Drigalski
Isolated from the respiratory tract of humans (nasopharynx). Susceptible to penicillin (10 μg discs).
Undetermined; maybe nonpathogenic.
- P. Vandamme, M. Gillis, M. Vancanneyt, B. Hoste, K. Kersters, and E. Falsen. Moraxella lincolnii sp. nov., Isolated from the Human
Respiratory Tract, and Reevaluation of the Taxonomic Position of Moraxella osloensis. Int J Syst Bacteriol July 1993 43:474-481.
- Elliot Juni and Kjell Bovre. Order IX Pseudomonadales Orla-Jensen 1921, Family II Moraxellaceae Rossau, Van Landschoot,
Gillis and De Ley 1991 In: Bergey’s Manual of Systematic Bacteriology, Second edition, Vol two, part B, George M. Garrity (Editor-
in-Chief), pp. 411-442.
Positive results for catalase, nitrites reduction, oxidase, ester lipase C, esterase, leucine arylamidase, glycine arylamidase, lysine
arylamidase, seryl-methionine arylamidase.
Negative results for denitrification, liquefaction of gelatin, proteolysis on Loffler slants, hydrolysis of Tween 80, indole production,
urease, DNase, beta-galactosidase, nitrates reduction, alkaline and acid phosphatase, phosphoamidase, trypsin, chymotrypsin,
alpha-galactosidase, beta-glucuronidase, alpha-glucosidase, beta-glucosidase, N-acetyl-beta-glucosaminidase, lipase (C14),
alpha-mannosidase, alpha-fucosidase, valine arylamidase, cysteine arylamidase, gamma-glutamyl arylamidase, proline
arylamidase, and alanyl-phenylalanyl-prolyl-alanine arylamidase. No acid production from D-glucose, maltose, D-fructose, or sucrose.
(c) Costin Stoica