Is blood agar a selective media?

Blood agar is a non-selective medium that can be made selective for certain pathogens by the addition of antibiotics, chemicals or dyes.

Which is not an example of selective media?

12. Which of the following is not an example of selective media? Explanation: Tryptic Soy is an example of broth which is used in broth formula. Mannitol agar, MacConkey’s agar, crystal violet blood agar, Thayer Martin agar, etc.

What is selective media and differential media explain with examples?

Selective media generally selects for the growth of a desired organism, stopping the growth of or altogether killing non-desired organisms. Differential media takes advantage of biochemical properties of target organisms, often leading to a visible change when growth of target organisms are present.

Is blood agar selective or differential agar?

Blood agar is a differential medium that distinguishes bacterial species by their ability to break down red blood cells. The ability to break down the cells will cause a change in the color of the blood agar. Some media are both differential and selective.

Is MacConkey agar selective or differential?

MacConkey agar is a selective and differentiating agar that only grows gram-negative bacterial species; it can further differentiate the gram-negative organisms based on their lactose metabolism.

Why is MacConkey agar selective?

This medium is both selective and differential. The selective ingredients are the bile salts and the dye, crystal violet which inhibit the growth of Gram-positive bacteria. The differential ingredient is lactose.

Is MacConkey a differential?

MacConkey agar is an example of a medium that is both differential and selective. The presence of bile salts, as well as crystal violet, within the media prevent gram-positive organisms from growing.

Is chocolate agar selective or differential?

Chocolate agar, a differential medium for gram-positive cocci.

What is a selective medium in microbiology?

A selective medium is a medium that allows the selection of one or more types of microorganisms. These microorganisms will be the only ones able to grow on or in the medium while all the others will be inhibited. Selectivity is achieved in several ways.

What are selective media?

Selective media are used to select for the growth of a particular “selected” microorganism. For example, if a certain microbe is resistant to aparticular antibiotic (e.g., novobiocin), then that antibiotic can be added to the medium in order to prevent other organisms, which are not resistant, from growing.

What is selective media quizlet?

What is the definition of a Selective Media? A Selective Medium is a culture medium designed to allow the growth of some kinds of organisms, but not others.

Which of the following describes selective media?

What is the definition of selective media? Selective media incorporate chemical substances that inhibit the growth of one type of bacteria while permitting the growth of another.

What is the purpose of selective media quizlet?

What is the purpose of selective media? The purpose of selective media is to isolate specific types of bacteria. Selective media contain chemicals that kill off some bacteria while helping other bacteria thrive.

Which media are selective and differential?

Hektoen Enteric Agar (HEK)

Hektoen enteric agar is a selective and differential medium used for the isolation and differentiation of Salmonella and Shigella from other Gram-negative enterics.

How selective and differential media are different?

The main difference between selective and differential media is that selective media are used to isolate a particular strain of microorganisms whereas differential media are used to identify and differentiate a closely-related group of microorganisms.

What is the application of selective medium?

Selective media are used for the growth of only selected microorganisms. For example, if a microorganism is resistant to a certain antibiotic, such as ampicillin or tetracycline, then that antibiotic can be added to the medium to prevent other cells, which do not possess the resistance, from growing.

Is chocolate agar selective or differential?

Chocolate agar, a differential medium for gram-positive cocci.

Is EMB Agar selective or differential?

EMB agar contains peptone, lactose, sucrose, and the dyes eosin Y and methylene blue; it is commonly used as both a selective and a differential medium. EMB agar is selective for gram-negative bacteria.