Term
Family Enterobacteriaceae
Characteristics common to ALL members |
|
Definition
- Gram-negative bacilli or coccobacilli/Rods
- Glucose Fermenters
- Lactose Fermenters
-Capable of reducing nitrate to nitrite
-Grow on MAC plates
-Motile by peritrichous flagella
- Catalase positive
-Oxidase negative |
|
|
Term
|
Definition
- Motile Gram-Negative bacillus
-Lactose Fermenter
-Oxidase Negative
-Nitrate Positive
-Indole Positive
-Methyl Red Positive
-Voges-Proskauer Negative
-Citrate Negative
-PYR Negative
-MUG Positive
-TSI = A/A with or without gas |
|
|
Term
|
Definition
Nonmotile, Gram-Negative Bacilli
Encapsulated, very mucoid colonies (sticky)
Lactose Fermenting: MAC (pink); Hektoen (yellow); XLD (yellow)
Oxidase Negative Nitrate Positive
Indole Negative Methyl Red Negative
V-P Positive Citrate Positive
MUG Negative TSI = A/AG (abundant gas)
|
|
|
Term
Genera Pantoea and Enterobacter |
|
Definition
Motile, Gram-Negative bacilli
Lactose Fermenting: BAC (smooth); MAC (pink;mucoid?) Hektoen (yellow); XLD (yellow)
Oxidase Negative Nitrate Positive
Indole Negative Methyl Red Negative
V-P Positive Citrate Positive
TSI/KIA = A/A usually with abundant gas |
|
|
Term
|
Definition
Motile, Gram-Negative Bacilli
Foul Smelling
Late Lactose Fermenter: MAC (light pink); Hektoen (colorless); XLD (red, yellow, or colorless)
Indole Variable Methyl Red Positive
V-P Negative Citrate Positive
TSI/KIA = A/A or A/AG; H2S Positive
Oxidase Negative Nitrate Positive
Lysine decarboxylase Negative |
|
|
Term
|
Definition
Motile, Gram-Negative Bacilli
Late Lactose Fermenting: MAC (Red); Hektoen (colorless); XLD (colorless or yellow)
Oxidase Negative Nitrate Positive
Indole Negative Methyl Red Variable
V-P variable Citrate Positive
S. marcescens = V-P Positive
TSI/KIA; A/A with or without gas |
|
|
Term
|
Definition
Motile, Gram-Negative Bacilli
Non-lactose fermenter
H2S Producer
Produce lysine and ornithine decarboxylase
Oxidase Negative Nitrate Positive
Urease Negative Indole Negative
Methyl Red Positive V-P Negative
Citrate Variable
TSI/KIA: K/A with or without gas; H2S Positive |
|
|
Term
|
Definition
NONMOTILE, Gram-Negative Bacilli
Non-lactose Fermenter
Oxidase Negative Nitrate Positive
Indole Variable Methyl Red Positive
V-P Negative Citrate Positive
TSI/KIA: K/A with or without gas
Urease Negative Lysine decarboxylase Negative |
|
|
Term
|
Definition
Motile, Gram-Negative Bacilli
Non-lactose-fermenting
Oxidase Negative Nitrate Positive
TSI/KIA: K/A; H2S Positive
PAD Positive
Produce Phenylalanine Deaminase
|
|
|
Term
|
Definition
BAP & Chocolate Agar: swarming; MAC (colorless, swarming, foul smelling); Hektoen (colorless); XLD (yellow or colorless)
Indole Negative
Maltose Negative
Ornithine decarboxylase Positive |
|
|
Term
|
Definition
Indole Negative
Maltose Positive
Ornithine Negative |
|
|
Term
|
Definition
BAP & Chocolate (swarming); MAC (colorless, foul smelling); Hektoen (colorless); XLD (yellow or colorless)
Indole Positive |
|
|
Term
|
Definition
Motile, Gram-Negative Bacillus
Non-lactose-fermenting
Oxidase Negative Nitrate Positive
PAD Positive Indole Positive
Methyl Red Positive V-P Negative
Citrate Negative
TSI/KIA: K/AG; H2S Negative |
|
|
Term
|
Definition
Motile, Gram-Negative Bacilli
Non-lactose-Fermenting
Oxidase Negative Nitrate Positive
PAD Positive Indole Positive
Methyl Red Positive V-P Negative
Citrate Positive
TSI/KIA: K/A; H2S Negative |
|
|
Term
|
Definition
Nonmotile, Gram-Negative Bacillus
Non-lactose-fermenting CATALASE POSITIVE
Oxidase Negative Nitrate Positive
Urease Negative Indole Negative
Methyl Red Positive V-P Negative
Citrate Negative Esculin Positive
TSI/KIA: K/AG
Ornithine decarboxylase Negative
Ferments glucose without producing Gas |
|
|
