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1. In addition to nutrients Lowenstein-Jensen (L-J) medium (used to culture Mycobacterium species including M. tuberculosis) contains malachite green (a cytotoxin) and antibiotics (penicillin and nalidixic acid) which inhibit both Gram negative and positive bacteria. This would be an example of what kind of media? 2. What is it about Mycobacterium (compared to other bacteria) that allows for L-J media to even work (e.g, to be useful for this purpose)? 3. What is it about blood agar that makes it useful for discriminating pathogenic strains of Streptococci from non-pathogenic (normal flora) strains? Be specific. 4. Which media discussed in this exercise would be best for checking a water sample for potential E. coli contamination from sewage? Explain your answer. 5. Which media discussed in this exercise would be best for checking a food sample for the presence of Staphylococcus aureus, a common cause of food poisoning? Explain your answer.

1. In addition to nutrients Lowenstein-Jensen (L-J) medium (used to culture Mycobacterium species including M. tuberculosis) contains malachite green (a cytotoxin) and antibiotics (penicillin and nalidixic acid) which inhibit both Gram negative and positive bacteria. This would be an example of what kind of media? 2. What is it about Mycobacterium (compared to other bacteria) that allows for L-J media to even work (e.g, to be useful for this purpose)? 3. What is it about blood agar that makes it useful for discriminating pathogenic strains of Streptococci from non-pathogenic (normal flora) strains? Be specific. 4. Which media discussed in this exercise would be best for checking a water sample for potential E. coli contamination from sewage? Explain your answer. 5. Which media discussed in this exercise would be best for checking a food sample for the presence of Staphylococcus aureus, a common cause of food poisoning? Explain your answer.

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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1. In addition to nutrients Lowenstein-Jensen (L-J) medium (used to culture Mycobacterium species including M. tuberculosis) contains malachite green (a cytotoxin) and antibiotics (penicillin and nalidixic acid) which inhibit both Gram negative and positive bacteria. This would be an example of what kind of media? 2. What is it about Mycobacterium (compared to other bacteria) that allows for L-J media to even work (e.g, to be useful for this purpose)? 3. What is it about blood agar that makes it useful for discriminating pathogenic strains of Streptococci from non-pathogenic (normal flora) strains? Be specific. 4. Which media discussed in this exercise would be best for checking a water sample for potential E. coli contamination from sewage? Explain your answer. 5. Which media discussed in this exercise would be best for checking a food sample for the presence of Staphylococcus aureus, a common cause of food poisoning? Explain your answer.
Transcribed Image Text:1. In addition to nutrients Lowenstein-Jensen (L-J) medium (used to culture Mycobacterium species including M. tuberculosis) contains malachite green (a cytotoxin) and antibiotics (penicillin and nalidixic acid) which inhibit both Gram negative and positive bacteria. This would be an example of what kind of media? 2. What is it about Mycobacterium (compared to other bacteria) that allows for L-J media to even work (e.g, to be useful for this purpose)? 3. What is it about blood agar that makes it useful for discriminating pathogenic strains of Streptococci from non-pathogenic (normal flora) strains? Be specific. 4. Which media discussed in this exercise would be best for checking a water sample for potential E. coli contamination from sewage? Explain your answer. 5. Which media discussed in this exercise would be best for checking a food sample for the presence of Staphylococcus aureus, a common cause of food poisoning? Explain your answer.
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