Microbiology Questions

3 microbiology questions.

Be sure to back up each statement of fact with cited sources. Your response to each question should be at least 100 words.

 

1. Haemophilus influenzae requires hemin (X factor) to synthesize cytochromes and NAD (V factor) from other cells. For what does it use these two growth factors? What disease(s) does H. influenzae cause?

2. The bacterial enzyme streptokinase is used to digest fibrin (blood clots) in patients with atherosclerosis. Why doesn’t injection of streptokinase cause a streptococcal infection? How do we know the streptokinase will digest fibrin only and not other tissues?

3. Based on biochemical tests and oxygen usage, how would you identify and classify, respectively, the following microbes:

a. Staphylococcus aureus

b. Pseudomonas aeruginosa

c. Bacillus subtilis

d. Escherichia coli