Ciproflaxin is a broad spectrum antibiotic that kills most normal microbial inhabitants in the human gut. Clostridium difficile is found in small numbers in the normal flora of some healthy adults however this normal inhabitant of the gut is not affected by ciproflaxin. Clostridium difficile is innately resistant to ciproflaxin. After therapy with ciproflaxin patients who normally carry Clostridium difficile often exhibit Clostridium difficile-associated diarrhea. The change in ability of Clostridium difficile to cause disease would best be explained by the statement that [choose the statement below that you would argue is the best explanation]
a. Ciproflaxin interacted with Clostridium difficile in a manner to make the organism more pathogenic.
b. I do not know the answer to this question.
c. Ciproflaxin has killed the microbes that normally compete with Clostridium difficile in the gut allowing the microbe to grow uncontrolled.
d. Ciproflaxin acted as a mutagen. Ciproflaxin induced a mutation in Clostridium difficile to make the organism more pathogenic.
Please provide support/justification for your answer to the ciproflaxin treatment of Clostridium question.
Bacillus subtilis is growing in a nutrient rich environment. If glucose is depleted, what would be the first response of Bacillus subtilis to the change in the environment?
a. utilization of another carbon source.
b. formation of an endospore.
c. alteration of a DNA sequence.
d. I donât know the answer to this question.
e. acceptance of DNA via gene transfer.
Please provide support/justification for your answer to the Bacillus depleting glucose question.
Which is _*NOT*_ true about the evolution of antibiotic resistance in bacterial populations? It can be mediated by
a. modification of a bacteriumâs genome through uptake of new genetic information.
b. I do not know the answer to this question.
c. alterations of a bacteriumâs genetic material through mutation.
d. changes in gene expression that occur in the presence of antibiotics.
e. selective growth of bacteria capable of degrading antibiotics.
Please provide support/justification for your answer to the bacterial antibiotic resistance evolution question.
Ciproflaxin is a broad spectrum antibiotic that kills most normal microbial inhabitants in the human gut. Clostridium difficile is found in small numbers in the normal flora of some healthy adults however this normal inhabitant of the gut is not affected by ciproflaxin. Clostridium difficile is innately resistant to ciproflaxin. After therapy with ciproflaxin patients who normally carry Clostridium difficile often exhibit Clostridium difficile-associated diarrhea. The change in ability of Clostridium difficile to cause disease would best be explained by the statement that [choose the statement below that you would argue is the best explanation]
| a. | Ciproflaxin interacted with Clostridium difficile in a manner to make the organism more pathogenic. | |
| b. | I do not know the answer to this question. | |
| c. | Ciproflaxin has killed the microbes that normally compete with Clostridium difficile in the gut allowing the microbe to grow uncontrolled. | |
| d. | Ciproflaxin acted as a mutagen. Ciproflaxin induced a mutation in Clostridium difficile to make the organism more pathogenic. |
Please provide support/justification for your answer to the ciproflaxin treatment of Clostridium question.
Bacillus subtilis is growing in a nutrient rich environment. If glucose is depleted, what would be the first response of Bacillus subtilis to the change in the environment?
| a. | utilization of another carbon source. | |
| b. | formation of an endospore. | |
| c. | alteration of a DNA sequence. | |
| d. | I donât know the answer to this question. | |
| e. | acceptance of DNA via gene transfer. Please provide support/justification for your answer to the Bacillus depleting glucose question. |
Which is _*NOT*_ true about the evolution of antibiotic resistance in bacterial populations? It can be mediated by
| a. | modification of a bacteriumâs genome through uptake of new genetic information. | |
| b. | I do not know the answer to this question. | |
| c. | alterations of a bacteriumâs genetic material through mutation. | |
| d. | changes in gene expression that occur in the presence of antibiotics. | |
| e. | selective growth of bacteria capable of degrading antibiotics. |
Please provide support/justification for your answer to the bacterial antibiotic resistance evolution question.
