Describe the causal agents and the symptoms of diphtheria and pertussis. Why has diphtheria incidence declined in the United States, while pertussis incidence is higher than a decade ago?
Answer to relevant QuestionsDescribe the process of infection by Mycobacterium tuberculosis. Does infection always lead to active tuberculosis? Why or why not? How is exposure to M. tuberculosis detected in humans? Distinguish between pathogenic staphylococci and those that are part of the normal flora. Identify the animals most likely to carry rabies in the United States. Why is rabies so rare in humans and domesticated animals in developed countries? Discuss the major mechanism of pathogenesis for tetanus and define measures for prevention and treatment. Why is it possible that a traumatic puncture wound could end up causing both tetanus and gas gangrene? Why are antibiotics ineffective for the treatment of cholera? What methods are useful for treating cholera victims?
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