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Iph2213:Epidemiology Question Paper

Iph2213:Epidemiology

Course:Bachelor Of Science In Public Health

Institution: Meru University Of Science And Technology question papers

Exam Year:2012

INSTRUCTIONS: Answer question one and any other two questions
QUESTION ONE – (30 MARKS)
(a) Describe the following terminologies used in epidemiology:
(i) Carrier status (2 Marks)
(ii) Neonatal mortality rate (2 Marks)
(iii) Secondary attack rate (2 Marks)
(iv) Single exposure, common vehicle outbreak (2 Marks)
(v) Vertical disease transmission (2 Marks)
(b) Using a diagram briefly describe the ‘iceberg’ concept of infectious disease.
(5 Marks)
(c) The following information was collected from village X during a public health survey:
Total average population = 50,000
Total number of live births = 5,000
Total number of deaths = 600
Total number of death before age of 28 days = 60
Total number of infant death = 200
Number of women who died from pregnancy related causes = 150
All cases of tuberculosis = 300
Death from tuberculosis = 100
Using the above information calculate:
(i) Prevalence rate of tuberculosis (1 Mark)
2
(ii) Case fatality rate of tuberculosis (1 Mark)
(iii) Neonatal mortality rate (1 Mark)
(iv) Infant mortality rate (1 Mark)
(v) Maternal mortality rate (1 Mark)
(d) Epidemiological studies are an important component of epidemiology. Briefly
differentiate between the following studies:
(i) Intervention and non-intervention studies. (2 Marks)
(ii) Case-control and cohort studies (4 Marks)
(iii) Cross-sectional studies and randomized control trials. (4 Marks)
QUESTION TWO – (20 MARKS)
(a) Using a diagram, discuss the relationship between incidence and prevalence.
(10 Marks)
(b) Discuss in details the stages in the natural history of a disease. (10 Marks)
QUESTION THREE – (20 MARKS)
(a) Construct a 2 by 2 table showing the comparison of results between a diagnostic/
screening test and the actual disease status, and show the calculation of sensitivity and
specificity. (10 Marks)
(b)
RADIOLOGIST I
RADIOLOGIST
II
Abnormal Suspect Doubtful Normal
Abnormal 20 10 5 30
Suspect 15 15 15 20
Doubtful 30 10 10 15
Normal 25 5 10 25
Using the information from the table, calculate the overall percent agreement between
radiologist I and radiologist II on x-ray film readings. (10 Marks)
3
QEUSTION FOUR – (20 MARKS)
You are a public health officer in Nchiru village. There has been an outbreak of rift valley fever
in your village, following consumption of meat from infected cattle. Discuss the steps you
would undertake to investigate the outbreak. (20 Marks)

Iph2213:Epidemiology Question Paper

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