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Species/Subspecies: Actinobacillus pleuropneumoniae
Etymology: Genus name: ray rod.
Species epithet: from pleuropneumonia (lung sac).
Significance:During the 1990th the desease has decreased in Sweden, but during the latest years, the disease has increased again. Acute cases are often fatal.
  [Very important]   
Old Species Name(s):Haemophilus parahaemolyticus, Haemophilus pleuropneumoniae
Type Strain: Shope 4074 = ATCC 27088 = CCUG 12837, 41656 och NCTC 12370.
Macromorphology (smell):
Actinobacillus pleuropneumoniae 
Grayish white colonies on chocolate agar, about 3 mm in diameter, most strains produce a thin zone of hemolysis on blood agar
Micromorphology: Small (0.3-0.5 x 0.6-1.4 µm) nonmotile coccoid or rod shaped cells, appears alone, in pairs or as short chains
Gram +/Gram -:
Fig. 57:2. Gram staining of Actinobacillus pleuropneumoniae, strain CCUG 12837T.

Metabolism: Facultatively anaerobic
Other Enzymes: Esculinase -, ornithine decarboxylase -, tryptophanase -, urease +
Biochemical Tests: Hydrogen sulfide +
Fermentation of carbohydrates:
Other carbohydrates: Dulcitol -, D-fructose +, D-galactose +, inositol -, D-mannose +, melibiose -.
Microbiological tests:
Actinobacillus pleuropneumoniae Actinobacillus pleuropneumoniae 
X- and V-factor tests can be used to differentiate biotype I from biotyep II of A. pleuropneumoniae.
Spec. Char.: Most strains of A. pleuropneumoniae, biotype I require V-factor (NAD or NADPH) for growth, while strains of biotype II does not require this factor.
Hosts: Pigs
Disease (Swedish):Pleuropneumoni (inflammation i lungsäcken) hos gris.
Disease (English):Pleuropneumonia (inflammation of the lungs and pleura) in pigs.
Clinical Picture:
Genome Sequence:
Acc-noStrainSize (bp)Genome
NC_009053 L20 2 274 482 1c + 0 
Totalt har 12 stammar sekvenserats med 0-3 plasmider.

16S rRNA Seq.:
Acc-noStrainNumber of NTOperon
AF224283 MCCM 00189 1533 

 Actinobacillus pleuropneumoniae
About 17 species have been described within genus Actinobacillus, but the relationship between members within the closely related genera Actinobacillus, Haemophilus, Mannheimia and Pasteurella is very uncertain since none of these genera forms monophyletic clusters.
Reference(s): No. 13, 95, 110

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Swedish University of Agricultural Sciences