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Species/Subspecies: Mannheimia varigena
Etymology: Genus name: named after the German microbiologist Walter Mannheim.
Species epithet: of different origin (refers to the fact that this species has been isolated from pigs and ruminants).
Significance:  [Of minor importance]   
Taxonomy:
PhylumClassOrderFamilyGenus
ProteobacteriaGammaproteobacteriaPasteurellalesPasteurellaceaeMannheimia
Type Strain: 177 = CCUG 38462
Macromorphology (smell): Small, regular and greyish colonies (1-2 mm in diameter). Most strains give hemolysis on bovine blood agar.
Micromorphology: Non-motile rods or coccoid rods (0.5 x 1.2 µm).
Gram +/Gram -:G-
Catalase/Oxidase:+/+
Other Enzymes: Ornithine decarboxylase (+), tryptophanase -, urease -.
Biochemical Tests: Citrate -, methyl red -, hydrogen sulphide (H2S) -.
Fermentation of carbohydrates:
D-glucoselactosemaltoseL-rhamnosesucrose
+vv++
L-arabinosecellobioseD-mannitolsalicintrehalose
v?+?-
glycerolinulinraffinoseD-sorbitolstarch
(+)-v-?
Other carbohydrates: Adonitol -, dextrin (V), D-fructose +, D-fucose -, D-galactose +, D-glycogen -, mannose -, D-melezitose -, D-melibiose -, D-ribose +, L-sorbose -, xylitol -, D-xylose +.
Spec. Char.:
Hosts: Pigs, cattle
Disease (Swedish):Gris: septikemi, enterit, pneumoni.
Nötkreatur: septikemi, pneumoni, mastit.
Disease (English):Pigs: septicemia, enteritis, pneumonia.
Cattle: septicemia, pneumonia, mastitis.
Clinical Picture:
Genome Sequence:
Acc-noStrainSize (bp)Genome
CP006953.1 177T 2 228 291 1l + 0 

16S rRNA Seq.:
Acc-noStrainNumber of NTOperon
AF053893 CCUG 38462T 1 504 

Taxonomy/phylogeny:
 Mannheimia varigena
Six 17 have been described within genus Mannheimia. The relationship between members within the closely related genera Actinobacillus, Haemophilus and Pasteurella is very uncertain since none of these genera forms monophyletic clusters.
Reference(s): No. 108
Updated:2018-12-06

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Swedish University of Agricultural Sciences