| Haemophilus haemolyticus |
Positive results for nitrates reduction, oxidase, alkaline phosphatase, catalase, H2S production, urease, acid production from: D(+)
glucose, maltose, D(-) fructose (weak), and D(+) galactose.
Negative results for arginine dehydrolase, citrate utilization (Simmons), lysine decarboxylase, ornithine decarboxylase,
alpha-glucosidase, gelatinase, ONPG, Voges-Proskauer test, acid production from: glycerol, xylitol, L(+) arabinose, dulcitol,
meso-inositol, mannitol, D(-) sorbitol, D(+) mannose, L(+) rhamnose, L(-) sorbose, cellobiose, lactose, D(+) melibiose, sucrose
(saccharose), trehalose, raffinose, inulin, esculin, and salicin.
Variable results for indole production, gas production from D(+) glucose, and acid production from D(+) xylose.
glucose, maltose, D(-) fructose (weak), and D(+) galactose.
Negative results for arginine dehydrolase, citrate utilization (Simmons), lysine decarboxylase, ornithine decarboxylase,
alpha-glucosidase, gelatinase, ONPG, Voges-Proskauer test, acid production from: glycerol, xylitol, L(+) arabinose, dulcitol,
meso-inositol, mannitol, D(-) sorbitol, D(+) mannose, L(+) rhamnose, L(-) sorbose, cellobiose, lactose, D(+) melibiose, sucrose
(saccharose), trehalose, raffinose, inulin, esculin, and salicin.
Variable results for indole production, gas production from D(+) glucose, and acid production from D(+) xylose.
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Proteobacteria, Class Gammaproteobacteria, Order Pasteurellales, Family Pasteurellaceae, Genus Haemophilus,
Haemophilus haemolyticus Bergey, Harrison, Breed, Hammer and Huntoon 1923.
Historical synonyms: "Bacillus X", Pritchett and Stillman 1919.
Haemophilus haemolyticus Bergey, Harrison, Breed, Hammer and Huntoon 1923.
Historical synonyms: "Bacillus X", Pritchett and Stillman 1919.
Gram-negative coccobacilli or rods, filamentous forms, non-capsulated.
Colonies on chocolate agar are smooth, convex, translucent, grayish, 0.5-1.5 mm in
diameter after 24 hours. Beta-hemolysis, lost after subcultivation.
Aerobic, facultatively anaerobic, require X-factor and V-factor for growth. CO2 is not
required. Growth on MacConkey agar is negative.
diameter after 24 hours. Beta-hemolysis, lost after subcultivation.
Aerobic, facultatively anaerobic, require X-factor and V-factor for growth. CO2 is not
required. Growth on MacConkey agar is negative.
Nasopharynx of the healthy humans and in subgingival dental plaque
None.
- Mogens Kilian, 2004.Genus III. Haemophilus. In: Bergey’s Manual of Systematic Bacteriology, Second edition,Vol two, part B,
George M. Garrity (Editor-in-Chief), pp. 883-904. - Mary P.E. Slack, 2006. Haemophilus. In: Topley & Wilson’s Microbiology and Microbial Infections, 10 edition, Vol. 2, Bacteriology,
Edward Arnold Ltd. - J. G. Holt et al., 1994. Facultatively Anaerobic Gram-Negative Rods. Subgroup 3. Family Pasteurellaceae. In: Begey’s Manual of
Determinative Bacteriology, 9th-edition, Williams & Wilkins, pp 194-196. - Zinnemann K., Biberstein E.L., 1975.Genus Haemophilus.In:Buchanan R.E., Gibbons N.E. (co-editors), Bergey’s Manual of
Determinative Bacteriology, eight edition, The Williams & Wilkins Company, Baltimore. - Pozsgi N., 1985. Genul Pasteurella. In: Bacteriologie medicala, vol II, V. Bilbiie, N. Pozsgi (sub redactia), Ed. Medicala, Bucuresti,
132-133. - Zheng ML, Li LH, Liu B, Lin YB, Zhang XT, Chen C, Qu PH, Zeng J. Haemophilus seminalis sp. nov., isolated from human semen.
Int J Syst Evol Microbiol 2020; 70:2581-2588.
(c) Costin Stoica
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