Biochemical characteristics and resistance

BIOCHEMICAL CHARACTERISTICS AND RESISTANCE

Biochemical characters

  • All pathogenic Bacteroides species are catalase negative except B. fragilis. B. nodosus does not ferment carbohydrates.
  • F. necrophorum is indole and H2S positive. Gelatin is not liquefied.
  • They ferment glucose and maltose with production of acid and gas but not lactose.

Resistance

  • Both the species are highly susceptible to atmospheric oxygen.
  • They are readily killed at 50 –60º C for 15 minutes.
Last modified: Monday, 4 June 2012, 5:45 AM