Biochem Rxn

Question 1

Organism

Answer 1

Key Biochemical Reactions

Question 2

E. coli

Answer 2

Indole (+), Citrate (-), Urease (-), TSI (A/A, gas), Motility (+), Lactose (+)

Question 3

Klebsiella pneumoniae

Answer 3

Indole (-), Citrate (+), Urease (Weak +), TSI (A/A, gas), Motility (-), Lactose (+)

Question 4

Klebsiella oxytoca

Answer 4

Indole (+), Citrate (+), Urease (Weak +), TSI (A/A, gas), Motility (-), Lactose (+)

Question 5

Proteus mirabilis

Answer 5

Indole (-), Citrate (+), Urease (Strong +), TSI (K/A, H2S +), Motility (+), Lactose (-)

Question 6

Proteus vulgaris

Answer 6

Indole (+), Citrate (+), Urease (Strong +), TSI (K/A or A/A, H2S +), Motility (+), Lactose (-)

Question 7

Salmonella spp.

Answer 7

Indole (-), Citrate (+), Urease (-), TSI (K/A, H2S +), Motility (+), Lactose (-)

Question 8

Shigella spp.

Answer 8

Indole (-), Citrate (-), Urease (-), TSI (K/A, no gas, no H2S), Motility (-), Lactose (-)

Question 9

Enterobacter spp.

Answer 9

Indole (-), Citrate (+), Urease (-), TSI (A/A, gas), Motility (+), Lactose (+)

Question 10

Morganella morganii

Answer 10

Indole (+), Citrate (+), Urease (Strong +), TSI (K/A, no H2S), Motility (+), Lactose (-)

Question 11

Citrobacter spp.

Answer 11

Indole (+/-), Citrate (+), Urease (+), TSI (K/A or A/A, H2S +), Motility (+), Lactose (+/-)

Question 12

Yersinia enterocolitica

Answer 12

Indole (+), Citrate (-), Urease (+), TSI (K/A, no H2S), Motility (+ at 25°C, - at 37°C), Lactose (-)