Cross Index Actinobacillus
SuperSet Prokaryote, Eubacteria Facultatively Anaerobic Gram-Negative Rods Pasteurellaceae
Compare Enterobacteriaceae, Arsenophonus nasoniae, Buttiauxella agrestis, Cedecea, Citrobacter, Edwardsiella, Enterobacter, Erwinia, Escherichia, Ewingella americana, Hafnia alvei, Klebsiella, Kluyvera, Leclercia adecarboxylata, Leminorella, Moellerella wisconsensis, Morganella morganii, Obesumbacterium proteus, Pantoea, Pragia fontium Proteus, Providencia, Rahnella aquatilis, Salmonella, Serratia, Shigella, Tatumella plyseos, Xenorhabdus, Yersina, Yohenella regensburgei

Vibrionacae, Aeromonas, Enhydrobacter aerosaccus, Photobacterium, Plesiomonas shigelloides, Vibrio

Pasteurellaceae, Actinobacillus, Hemophilus, Pasteurella

Calymmatobacterium granulomatis, Cardiobacterium hominis, Chromobacterium, Eikenella corrodens, Gardnerella vaginalis, Streptobacillus moniliformis, Zymomonas
Contrast Archaea
Subset  

 

Morphology Actinobacillus
CELLULAR  
Staining Gram-negative. Not acid-fast. Exhibit irregular staining. Small amounts o extracellular slime may be demonstrated in wet India ink preparations
Morphology Cells spherical, oval or rod-shaped, 0.4 + 0.1 x 1.0 + 0.4 um. The cells are mostly bacillary but are interspersed with coccal elements that often lie at the pole of a bacillus giving a characteristic "Morse code" form. Occasionally longer forms occur up to 6 um, especially on media containing glucose or maltose. The cells are arranged singly, in pairs or, more rarely, in chains
Motility Nonmotile.
Specialized structures Do not form endospores
Division  
COLONIAL  
Solid surface Cultures are very sticky on primary isolation; colonies may be difficult to remove completely from the agar surface. Surface cultures have low viability and die in 5-7 days All species except one can grow on MacConkey agar
Liquid  

 

Growth Parameters Actinobacillus
PHYSIOLOGICAL  
Tropism Chemoorganotrophs
Oxygen Facultative anaerobes having a fermentative type of metabolism
pH  
Temperature Optimum temperature, 37`C; temperature range for growth, 20-42`C.
Requirements Growth has been reported only on complex media; minimal nutritional requirements are unknown.
Products Acid but no gas is produced within 24 h from glucose and sucrose. Dulcitol, inositol and inulin are not fermented. Other carbohydrates may be fermented with acid but no gas Methyl red test is negative. Nitrates are reduced to nitrites. Indole is not produced
Enzymes Positive for B-galactosidase All species except one are positive for urease
Unique features  
ENVIRONMENTAL  
Habitat mammals (including man) and birds
Lifestyle Parasitic
Pathogenicity  
Distribution  

 

Genome Actinobacillus
G+C Mol % 40-43 (Tm).
   

 

Reference Actinobacillus
First citation Brumpt, E. (1910) Precis de Parasitologie. 1st Ed., Masson and Co. Paris
The Prokaryotes p
Bergey's Systematatic p 570 J.E. Philips
Bergey's Determinative p 194
References