Mannheimia haemolytica
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Proteobacteria, Class Gammaproteobacteria, Order Pasteurellales, Family Pasteurellaceae, Genus Mannheimia,
Mannheimia haemolytica Angen, Mutters, Caugant, Olsen and Bisgaard 1999. Corresponds to P. haemolytica biogrup 1 (Bisgaard
and Mutters, 1986).
Historical synonym:
Pasteurella haemolytica Newsom and Cross, 1932. Corresponds to P. haemolytica biogrup 1 (Bisgaard and
Mutters, 1986).
Gram-negative, nonmotile, small rods and coccobacilli.
Colonies are regular, smooth, and graysh on blood agar; 1-2 mm in diameter
Most strains show a characteristic beta-hemolysis on bovine blood agar. Strains are
V-factor independent and X-factor independent. Growth on MacConkey is variable.
Growth is mesophilic and facultative anaerobic.
Present in nasopharynx and tonsils (almonds) of sheep & goat and in the intestine of
chicken & turkey.
Pneumonia in cattle and sheep, mastitis in sheep, septicaemia in lambs. Rarely human infections after animal contact.
Potential virulence factors are the polysaccharide capsule, LPS, neuraminidase, transferring binding proteins, sialoglycoprotease,
leucotoxin.
  1. Mutters R., Angen Ø., Bisgaard M. 2004. Genus V. Mannheimia. In: Bergey’s Manual of Systematic Bacteriology, Second edition,
    Vol two, part B, George M. Garrity (Editor-in-Chief), pp. 907-911.
  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. Facultatively Anaerobic Gram-Negative Rods. Subgroup 3. Family Pasteurellaceae. In: Begey’s Manual of
    Determinative Bacteriology, 9th-edition, Williams & Wilkins, pp 194-196.
  4. Carmen Pinzaru, 2009. Identificarea genurilor Pasteurella, Mannheimia, Actinobacillus.In:D.Buiuc, M.Negut (Ed.),Tratat de
    Microbiologie Clinica, Ed. Medicala, Bucuresti, 859-868.
  5. Buchanan R.E., Gibbons N.E. (co-editors), 1975. Bergey’s  Manual of Determinative Bacteriology, eight edition, The Williams &
    Wilkins Company, Baltimore.
Mannheimia (Pasteurella) haemolytica
Positive results for nitrates reduction, oxidase, alkaline phosphatase, catalase, indole
production, beta-glucosidase ONPG, acid production from: mannitol, D(-) sorbitol, D(-
) fructose, L(-) fucose, D(+) galactose, D(+) glucose (without gas), lactose, maltose,
sucrose (saccharose), raffinose & dextrin.

Negative results for alpha-glucosidase, gelatinase, H
2S production (TSI), Voges-
Proskauer test, urease, arginine dehydrolase, lysine decarboxylase, ornithine
decarboxylase, acid production from: xylitol, L(+) arabinose, L(-) xylose, dulcitol,  D(+)
mannose, L(-) sorbose, L(+) rhamnose, cellobiose, D(+) melibiose, trehalose, inulin,
esculin & salicin.

Variable results for acid production from: glycerol, D(-)arabinose & meso-inositol.
(c) Costin Stoica
Antibiogram
Encyclopedia
Culture media
Biochemical tests
Stainings
Images
Movies
Articles
Identification
Software
R E G N U M
PROKARYOTAE
Previous page
Back