Week 3: Enterobacteriaceae Part I (key facts for ID)

H2S + species

1. Edwardsiella

2. Salmonella

3. Citrobacter

4. Proteus

phenylalanine deaminase PAD + and urease + species

1. Proteus

2. Morganella

3. Providencia

Voges Proskauer + species

1. Klebsiella

2. Enterobacter

3. Serratia

non motile species 

1. Shigella

2. Klebsiella

3. Yersinia (motile at RT)

lactose fermenters 

1. E. coli 

2. Klebsiella 

3. Enterobacter

4. Serratia (slow)

5. Citrobacter

non lactose fermenters

1. Shigella (slow)

2. Salmonella 

3. Proteus

4. Yersinia

5. Providencia 

what does IMViC stand for?

1. indole

2. methyl red

3. Voges-Proskauer

4. citrate 

Escherichia IMViC test results

+ + - - 

Klebsiella, Enterobacter, and Serratia IMViC test results

- - + + 

Salmonella lysine decarboxylase test results

+

Citrobacter lysine decarboxylase test result

-

is Shigella gas + or -?

-

are Klebsiella and Enterobacter gas + or -?

+

is Klebsiella ORN + or -?

-