Enterobacteriaceace; Enterobacter Flashcards
Habitat
Gut, environment
Morphology
- Rod
- Capsule, strong, large capsule production
- Flagella
Culture
Mucoid colonies
Biochemical characteristics; Esherichia, Klebsiella and Enterobacter - > Lactose
Escherichia: +
Klebsiella: +
Enterobacter: +
Biochemical characteristics; Esherichia, Klebsiella and Enterobacter - > Mannitol
Escherichia: +
Klebsiella: +
Enterobacter: +
Biochemical characteristics; Esherichia, Klebsiella and Enterobacter - > Indol production
Escherichia: +
Klebsiella: -
Enterobacter: -
Biochemical characteristics; Esherichia, Klebsiella and Enterobacter - > Methyl red
Escherichia: +
Klebsiella: -
Enterobacter: -
Biochemical characteristics; Esherichia, Klebsiella and Enterobacter - > Voges-Proskauer
Escherichia: -
Klebsiella: +
Enterobacter: +
Biochemical characteristics; Esherichia, Klebsiella and Enterobacter - > Citrate utilization
Escherichia: -
Klebsiella: +
Enterobacter: +
Biochemical characteristics; Esherichia, Klebsiella and Enterobacter - > Urease
Escherichia: -
Klebsiella: +
Enterobacter: -
Biochemical characteristics; Esherichia, Klebsiella and Enterobacter - > H2S
Escherichia: -
Klebsiella: -
Enterobacter: -
Biochemical characteristics; Esherichia, Klebsiella and Enterobacter - > Phenylalanine deaminase
Escherichia: -
Klebsiella: -
Enterobacter: -
Differentiation of Klebsiella and Enterobacter?
Klebsiella has no flagella
Pathogenicity
- Saprophytic
- Rarely respiratory infections in humans
- Can be present as secondary bacteria
Species
- E. cloacae
- E. aerogenes
Negative and positive motility test
Neg: thin spiral in middle of sample tube
Pos: spread of bacteria in sample
Indole production test, inoculated, neg and pos results
Uninoculated: Yellow, clear
Neg: yellow with clear upper layer
Pos: yellow with pink upper layer
Methyl red test results
Neg: brown/yellow
Pos: red
Voges-Proskauer test results
Neg: yellow/clear
Pos: yellow/red
Urea test results
Uninodulated: peach
Neg: yellow
Pos: bright pink
Citrate utilization test results
Neg: dark green
Pos: dark green/blue