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Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Proteobacteria => Gammaproteobacteria => Pasteurellales => Pasteurellaceae => Haemophilus => Haemophilus felis Inzana,
Johnson, Shell, Møller and Killian 1999.
Johnson, Shell, Møller and Killian 1999.
Gram negative, 0.45-0.55 x 1.5-1.7 µm, coccobacilli or small rods, with occasional
filamentous forms.
filamentous forms.
Colonies on chocolate agar incubated in air plus 10% extra CO2 are raised, smooth,
and rounded 0.5 -1.0 mm in diameter after 24 h.
Colonies on brain-heart infusion agar supplemented with NAD are very adherent and
show yellow pigmentation when collected on a loop.
Weak hemolysis after 3 days incubation. CAMP test negative. Require increased
concentration of CO2 in incubation atmosphere for primary isolation but this
requirement is lost upon subcultivation. Require V-factor but not X-factor for growth.
Optimum temperature 35-37 °C. Growth on Mac Conkey agar is negative.
and rounded 0.5 -1.0 mm in diameter after 24 h.
Colonies on brain-heart infusion agar supplemented with NAD are very adherent and
show yellow pigmentation when collected on a loop.
Weak hemolysis after 3 days incubation. CAMP test negative. Require increased
concentration of CO2 in incubation atmosphere for primary isolation but this
requirement is lost upon subcultivation. Require V-factor but not X-factor for growth.
Optimum temperature 35-37 °C. Growth on Mac Conkey agar is negative.
Has been isolated from the nasopharynxes of 6 of 28 apparently normal cats and from the lower respiratory tract of a cat with chronic
obstructive pulmonary disease.
obstructive pulmonary disease.
Has been isolated from the lower respiratory tract of a cat with chronic obstructive pulmonary disease.
- 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. - Inzana T.J., Johnson J.L., Shell L., MØller K., Kilian M., 1992. Isolation and characterization of a newly identified Haemophilus
species from cats: ”Haemophilus felis”. J. Clin. Microbiol., 30, 2108-2112.
Nitrates reduction, alkaline phosphatase, catalase, H2S, acid from D(+) glucose, mannitol, D(+) galactose, D(+) mannose, lactose,
maltose, sucrose (saccharose) & α-glucosidase (PNPG) are positive.
Oxidase, urease, lysine decarboxylase, ornithine decarboxylase, indole, L(+) arabinose, D(+) xylose, meso-inositol, D(-) sorbitol,
ONPG, D(+) melibiose, trehalose, raffinose, inulin, esculin, salicin & gas from D(+) glucose are negative.
maltose, sucrose (saccharose) & α-glucosidase (PNPG) are positive.
Oxidase, urease, lysine decarboxylase, ornithine decarboxylase, indole, L(+) arabinose, D(+) xylose, meso-inositol, D(-) sorbitol,
ONPG, D(+) melibiose, trehalose, raffinose, inulin, esculin, salicin & gas from D(+) glucose are negative.
(c) Costin Stoica
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