An example of secondary prevention in infectious d

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Question 1 of 5

An example of secondary prevention in infectious diseases is:

A. Vaccination B. Antibiotic treatment C. Quarantine and isolation D. Health education about hygiene

Correct Answer: C

Rationale: Quarantine (C) isolates early cases (secondary). A and D are primary, B is treatment.

Question 2 of 5

True statements about complications of appendicitis include all the following EXCEPT

A. there is at least a 70 percent incidence of appendiceal perforation among patients with appendicitis who are under 2 years of age B. there is a 30 percent incidence of appendiceal perforation among patients with appendicitis who are over 70 years of age C. the incidence of perforation is higher in patients with leukocytosis (>20,000 cells per microliter) D. surgical mortality is about 0.1 percent in the absence of perforation

Correct Answer: C

Rationale: A and B reflect higher perforation at age extremes. D and E align with surgical outcomes. C is false—leukocytosis indicates severity, not perforation risk directly.

Question 3 of 5

The parameter that can be used to obtain the best estimate of the prevalence of dental caries is

A. the calculus index B. the malocclusion index C. the decayed, missing, or filled rate D. the oral hygiene index

Correct Answer: C

Rationale: DMF rate directly measures caries prevalence.

Question 4 of 5

All the following are independently associated with poor prognosis in colon cancer EXCEPT

A. size of the tumor B. preoperative carcinoembryonic antigen (CEA) titer C. number of involved lymph nodes D. poorly differentiated histology

Correct Answer: A

Rationale: Size alone isn’t prognostic; others are.

Question 5 of 5

Which of the following patients is most likely to have a stroke within a year?

A. A 70-year-old male smoker with hypertension B. A 70-year-old female smoker with hypertension C. A 50-year-old woman with mitral valve prolapse D. A 50-year-old woman with a recent transient ischemic attack

Correct Answer: D

Rationale: TIA has highest 1-year stroke risk (~10-20%); A and B lower, C and E minimal.

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An example of secondary prevention in infectious diseases is:

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