Exam (elaborations)
NR 503 Midterm Exam and Final Exam Study Guide -NR503: Student Consult Questions and Answers
- Course
- Institution
NR 503 Midterm Exam and Final Exam Study Guide -NR503: Student Consult Questions and Answers
[Show more]
Seller
Follow
HIGHSCORE
Reviews received
Content preview
NR 503 Midterm Exam and Final ExamStudy Guide -NR503 –Student Consult
Questions
, Question 1
Which of the following is a condition which may occur during the incubation period?
Onset of clinical illness
Receipt of infection
Signs and symptoms of disease
Transmission of infection
Isolation of disease carrier through quarantine
That's correct!
The incubation period is defined as the interval from receipt of infection to the
time of onset of clinical illness. Accordingly, individuals may transmit infectious
agents during the incubation period as they show no signs of disease that would
enable the isolation of sick individuals by quarantine.
Question 2
Chicken pox is a highly communicable disease. It may be transmitted by direct contact
with a person infected with the varicella-zoster virus (VZV). The typical incubation time
is between 10 to 20 days. A boy started school 2 weeks after showing symptoms of
chicken pox including mild fever, skin rash, and fluid-filled blisters. One month after the
boy returned to school, none of his classmates had been infected by VZV. The main
reason was:
Herd immunity
All had been immunized prior to the school year
Contact was after infectious period
Subclinical infections were not yet detected
Disease was endemic in the class
That's correct!
The disease is spread by contact with an infected individual who can transmit
the agent (VZV) to immunologically naive persons during the incubation period
and for several days after onset of clinical illness. Since the boy started school
14 days after showing signs consistent with chicken pox, it is most likely that he
was no longer infectious.
, Question 3
The ability of a single person to remain free of clinical illness following exposure to an
infectious agent is known as:
Hygiene
Vaccination
Herd immunity
Immunity
Latency
That's correct!
Immunity is the capacity of a single individual to avoid disease susceptibility
when exposed to an infectious agent. Herd immunity is a population
characteristic. For certain diseases, individual immunity can be acquired by
vaccination, but this is not true for all infectious diseases.
Question 4
Which of the following is characteristic of a single-exposure, common-vehicle outbreak?
Long latency period before many illnesses develop
There is an exponential increase in secondary cases following initial exposures
Cases include only those who have been exposed to sick persons
The epidemic curve has a normal distribution when plotted against the logarithm of
time
Wide range in incubation times for sick individuals
That's correct!
Single-exposure, common-vehicle outbreaks involve a sudden, rapid increase in
cases of disease that are limited to persons who share a common exposure.
Additionally, few secondary cases develop among persons exposed to primary
cases. A histogram of the outbreak can plot the number of cases by time of
disease onset. In single-exposure, common-vehicle outbreaks, a log
transformation of the time of disease onset will often take on the characteristic
shape of a normal distribution (i.e., a bell curve) with the median incubation
time found at the peak of the curve.
, Question 5
What is the diarrhea attack rate in persons who ate both ice cream and pizza?
39/52
21/70
39/67
51/67
none of the above
That's correct!
The attack rate in this example is defined as the number of persons who
develop diarrhea divided by the total number of people at risk. In this example,
the at-risk group is those who have eaten both ice cream and pizza. Of these 52
persons, 39 developed diarrhea.
Question 6
What is the overall attack rate in persons who did not eat ice cream?
30%
33%
35%
44%
58%
That's correct!
The attack rate is the number of persons with diarrhea (14 + 9) divided by the
total number of persons who did not eat ice cream (40 + 30).
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller HIGHSCORE. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $15.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
78998 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now