Cross Index	Francisella
SuperSet	Prokaryote, Eubacteria Gram-Negative Aerobic/ Microaerophilic Rods and Cocci
Compare	Acetobacter, Acidiphilium, Acidomonas methanolica, Acidothermus cellulolyticus, Acidovorax, Acinetobacter, Afipia, Agrobacterium, Agromonas oligotrophica, Alcaligenes, Alteromonas, Aminobacter, Aquaspirillum, Azomonas, Azorhizobium caulinodans, Azotobacter, Bacteroides, Beijerinckia, Bordetella, Bradyrhizobium japonicum, Brucella, Chromohalobacter marismortui, Chryseomonas luteola, Comamonas, Cupriavidus necator, Deleya, Derxia gummosa, Ensifer adherans, Erythrobacter longus, Flavimonas oryzihabitans, Flavobacterium, Francisella, Frateuria aurantica, Gluconobacter, Halomonas, Hydrogenophaga, Janthinobacterium lividum, Kingella, Lampropedia hyalina, Legionella, Marinobacter hydrocarbonoclasticus, Marinomonas, Mesophilobacter marinus, Methylobacillus glycogenes, Methylobacterium, Methylococcus, Methylomonas, Methylophaga, Methylophilus, Methylovorus glucosotrophus, Moraxella, Morococcus cerebrosus, Neisseriaceae, Neisseria, Oceanospirillum, Ochrobactrum anthropi, Oligella, Paracoccus, Phenylobacterium immobile, Phyllobacterium, Pseudomonas, Psychrobacter immobilis, Rhizobacter daucus, Rhizobium, Rhizomonas suberifaciens, Rochalimaea, Roseobacter, Rugomonas rubra, Serpens, Sinorhizobium, Sphingobacterium, Taylorella equigenitalis, Thermoleophilum, Thermomicrobium, Thermus, Variovorax paradoxus, Volcaniella eurhalina, Weeksella, Wolinella, Xanthobacter, Xanthomonas, Xyella fastidiosa, Xylophilus ampelinus, Zoogloea ramigera
Contrast	Archaea
Subset

 

Morphology

Francisella

CELLULAR

Staining	Gram-negative, faintly -staining.
Morphology	Rod-shaped cells, 0.2 x 0.2-0.7 um (Francisella tularensis) or 0.7 x 1.7 um (Francisella novicida), when cultured in appropriate media and examined during active growth; pleomorphism occurs subsequently..
Motility	Nonmotile
Specialized structures

Division

COLONIAL

Solid surface

On glucose-cysteine-blood agar smooth gray colonies are formed which reach a maximum size in 2-4 days and are surrounded by a characteristic green zone of discolouration

Liquid

 

Growth Parameters

Francisella

PHYSIOLOGICAL

Tropism
Oxygen	Obligately aerobic
pH
Temperature
Requirements	. Cysteine (or cystine) is either required for growth (F. tularensis) or is greatly stimulatory for growth (F.novicida).
Products	Catabolism of carbohydrates is characteristically slow with the production of acid but no gasH2S is produced.
Enzymes	Weakly catalase-positive. Oxidase-negative
Unique features	, the type species contains relatively large amounts of long-chain saturated and monoenoic C20 to C26 fatty acids as well as 3-hydroxy- hexadecanoate, 2-hydroxy-decanoate and 3-hydroxy-octadecanoate.

ENVIRONMENTAL

Habitat
Lifestyle
Pathogenicity	F. tularensis is the causative agent of tularemia in man and animals. F. novicida causes experimental infections in laboratory animals.

Distribution

 

Genome

Francisella

G+C Mol %

33-36

 

Reference

Francisella

First citation	Dorofe'ev, K.A.(1947) Classification of the causative agent of tularemia.symp. Res. Works Inst. Epidemiol. Mikrobiol. (Chita). (Russ) 1:170-180
The Prokaryotes	p
Bergey's Systematatic	p 394 H. T. Eigelsbach and V. G. McGann
Bergey's Determinative	p 83

References