| 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 Pseudomonadota (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, 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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