Paenibacillus macerans

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Gram stain Culture

General information
- Paenibacillus is a genus originallt included within the genus Bacillus and than reclassified as a seperate genus in 1993.
  The name reflects: Latin paene means almost, so paenibacilli are literally "almost bacilli".
  
  Taxonomy
  Family: Bacillaceae
  
  Natural habitats
  Ubiquitous in nature
  
  Clinical significance
  Accidentally human pathogen (bacteremia, septicemia).
  They could cause allergies as a result of its histamine producing properties
Gram stain
- Long, slender Gram positive rods,
  
  0.5-0.7 x 2.5-5.0 µm
  
  gram are often negatively stained.
  
  Spore shape: ellipsoidal
  
  Spore position: subterminal / terminal
  
  Sporangia swelling: positive
Culture characteristics
- Facultative anaerobic
  
  BA: colonies are opaque, round and usually thin and spreading.
  
  BBAØ: growth
Characteristics
References
- James Versalovic et al.(2011) Manual of Clinical Microbiology 10th Edition