Mannitol Salt Agar and Staphylococci
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Mannitol Salt Agar and Staphylococci

This quiz covers the use of Mannitol Salt Agar as a selective and differential medium for staphylococci bacteria, particularly focusing on the fermentation of mannitol. Topics include pH indicators, color changes in the agar, and identifying pathogens based on fermentation results.

Created by
@TopPanther

Questions and Answers

What type of flagella arrangement does Escherichia coli have?

Peritrichous

Why is Escherichia coli considered to have a competitive growth advantage?

It can synthesize all 20 essential amino acids

Which of the following is NOT a characteristic of Escherichia coli?

Non-motile

What is the role of Escherichia coli in the host's body?

<p>Aid in food digestion</p> Signup and view all the answers

In a bacterial population growing rapidly under ideal conditions, what type of growth curve would be observed?

<p>Exponential</p> Signup and view all the answers

What is the purpose of Mannitol Salt Agar in microbiology?

<p>To differentiate between mannitol fermenters and non-fermenters</p> Signup and view all the answers

What distinguishes Salmonella and Shigella from other members of the Enterobacteriaceae family on Hektoen agar?

<p>Blue-green color</p> Signup and view all the answers

What is the main purpose of enrichment media in microbiology?

<p>To encourage growth of desired microbes to detectable levels</p> Signup and view all the answers

What is the significance of blood agar in microbiology?

<p>To observe the effect of haemolysins on RBCs</p> Signup and view all the answers

Which type of media suppresses unwanted microbes and encourages the growth of desired ones?

<p>Selective media</p> Signup and view all the answers

How are mannitol fermenters distinguished from non-fermenters on Mannitol Salt Agar?

<p>By yellow/pink color change in the agar</p> Signup and view all the answers

Which type of media is designed to encourage the growth of specific organisms while inhibiting others?

<p>Selective media</p> Signup and view all the answers

What is the main purpose of enrichment media?

<p>To encourage the growth of a particular organism</p> Signup and view all the answers

Which agar is selective for staphylococci as it inhibits the growth of other bacteria?

<p>Mannitol salt agar</p> Signup and view all the answers

What distinguishes differential media from other types of media?

<p>Contains indicators to visually differentiate between organisms</p> Signup and view all the answers

A faecal specimen suspected to contain Salmonella would most likely be cultured using which type of media?

<p>Selective media</p> Signup and view all the answers

Tetrathionate broth is an example of which type of media used for clinical diagnosis?

<p><strong>Selective media</strong></p> Signup and view all the answers

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