A new chemotherapeutic drug kills bacteria but not humans. Discuss the possible ways the drug may selectively act on bacterial cells.
- Compare and contrast aerobic respiration, anaerobic respiration, and fermentation.
- Louis Pasteur said, “The role of the infinitely small in nature is infinitely large.” Explain what he meant, using examples of the roles of microorganisms in health, industry, and the environment.
- Fungi tend to reproduce sexually when nutrients are limited or other conditions are unfavorable, but they reproduce asexually in more ideal conditions. Why is this strategy successful?
- Some potentially pathogenic bacteria and fungi, including strains of Enterococcus, Staphylococcus, Candida, and Aspergillus, can survive for one to three months on a variety of materials found in hospitals, including scrub suits, lab coats, plastic aprons, and computer keyboards. What can hospital personnel do to reduce the spread of these pathogens?
- Human immunodeficiency virus (HIV) preferentially destroys CD4+ cells. Specifically, what effect does this have on antibody and cell-mediated immunity?
- Given the various predisposing factors that make humans susceptible to opportunistic infections, how can healthcare providers curtail the rising incidence of such infections?
- Fifteen-year-old Dolores was embarrassed to talk with her mother about the pain she felt in her “private parts,” but she was worried she might have gotten a disease, despite Nick’s assurance that she was his “first.” Her mother insisted that Dolores see a doctor, who discovered cervical lesions caused by a virus associated with cancer.
a. What sexually transmitted virus is involved?
b. How should the physician treat the lesions?
c. How could Dolores have protected herself?
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