General information

• the following information is not yet verified
  Taxonomy
  Family: Shewanellaceae
  Formerly: Pseudomonas Malitof apathogenic: S. baltica, S. fidelis, S. frigidimarina, S. profunda
  
  Natural habitat:
  In the environment and in food products, does not belong to the normal flora of the human being.
  - S.algae occurs in the vicinity of salt water
  - S.putrefaciens isolated from fish, chicken, meat, fresh and saltwater.
  
  Clinical significans
  Clinical significance unknown.
  Is often found in mixed cultures. In cellulitis, otitis media, skin and soft tissue infections, peritonitis, respiratory- and urinary tract infections S. algae is most commonly isolated in humans
  > 80% (Note errors) and is considered to be more virulent than S. putrefaciens

Gram stain

• the following information is not yet verified
  Gram-negative rods.
  
  

Culture characteristics

• the following information is not yet verified
  

  Obligate Aeroob Convex, smooth and sometimes mucoid colonies with yellow / brown - brown pigment and give a green discoloration of the bloodagar.
  - S. algae is always hemolytic (after 48-72 hours), it can be mucoid
  - S. putrefaciens, is usually not- haemolytic and not mucoid
  
  McConkey growth, non lactose fermenter
  
  BBAØ no growth
  
  Warning As the two species seem to have different potential for humans, correct identification is important.

Characteristics

• Gram-negative
• bacilli
• growth obligate-aerobic
• catalase-positive
• oxidase-positive
• indole-negative
• urease-negative
• TSI production of H2S
• vancomycin-resistant
• colistine-susceptible
• beta-haemolysis: negative

References