Enterics Part 1 Flashcard

Front

What is MacConkey agar primarily used for in microbiology?

Back

To differentiate between lactose fermenting and non-lactose fermenting bacteria.

Front

What are Enterics typically characterized as?

Back

Oxidase negative.

Front

What happens to non-lactose fermenting colonies on MacConkey agar?

Back

They become colorless or transparent.

Front

What is Enterobacteriaceae?

Back

A large family of enteric gram-negative rods.

Front

What staining technique was historically used in bacterial identification?

Back

Gram stain.

Front

What type of bacteria does MacConkey agar select for?

Back

Gram-negative bacteria.

Front

What is the significance of lactose fermentation in microbiology?

Back

It helps differentiate between pathogenic and non-pathogenic bacteria.

Front

What color do lactose fermenting colonies turn on MacConkey agar?

Back

They turn pink.

Front

What is the primary function of the oxidase test?

Back

To determine if a bacterium produces cytochrome c oxidase.

Front

What is the typical morphology of Enterobacteriaceae?

Back

They are rod-shaped (bacilli).