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Microbiology: Sabouraud Dextrose Agar

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Questions and Answers

What types of organisms can be cultivated using Sabouraud Dextrose Agar?

Sabouraud Dextrose Agar can cultivate dermatophytes, various fungi, and filamentous bacteria like Nocardia.

Why is it important to follow the directions on the bottle when preparing Sabouraud Dextrose Agar?

Following the directions ensures proper preparation and sterility for accurate cultivation results.

What are the expected growth outcomes for the control organisms on Sabouraud Dextrose Agar?

Aspergillus flavus and Candida albicans should show growth, while Streptococcus pneumoniae should show no growth.

In what scenarios might Sabouraud Dextrose Agar be used in a laboratory?

It is used to cultivate samples from patients suspected of fungal infections or to study fungal biology. Signup and view all the answers

What distinguishes dermatophytes from nonpathogenic fungi in terms of cultivation on SDA?

Dermatophytes are generally pathogenic fungi that can cause infections, whereas nonpathogenic fungi do not cause disease. Signup and view all the answers

What types of bacteria can be grown on Sabouraud Dextrose Agar besides fungi?

Filamentous bacteria such as Nocardia can be grown on SDA. Signup and view all the answers

How does the growth of Aspergillus flavus and Candida albicans on SDA illustrate its use in cultivating pathogenic fungi?

Both Aspergillus flavus and Candida albicans are pathogenic fungi that demonstrate growth on SDA, confirming its effectiveness. Signup and view all the answers

What is the expected result for Streptococcus pneumoniae when cultured on Sabouraud Dextrose Agar?

Streptococcus pneumoniae is expected to show no growth on SDA. Signup and view all the answers

Why is it essential to follow the proper preparation procedure for Sabouraud Dextrose Agar?

Following the proper preparation ensures that the medium supports the growth of targeted fungi and bacteria effectively. Signup and view all the answers

In what way does Sabouraud Dextrose Agar demonstrate specificity for certain fungi?

SDA is specifically designed to favor the growth of dermatophytes and other fungi while inhibiting bacteria. Signup and view all the answers

Study Notes

Sabouraud Dextrose Agar (SDA)

Used to cultivate dermatophytes and fungi.
Can also grow filamentous bacteria like Nocardia.
Procedure: Follow instructions on the product bottle.
Uses: Cultivation of pathogenic and nonpathogenic fungi, particularly dermatophytes.
Aspergillus flavus and Candida albicans: Show growth on SDA.
Streptococcus pneumoniae: Does not grow on SDA.

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Description

This quiz focuses on Sabouraud Dextrose Agar (SDA) and its applications in cultivating fungi and dermatophytes. Learn about the growth characteristics of various microorganisms on SDA and the appropriate procedures for its use. Test your understanding of the implications of SDA in microbiological studies.