Biostats/Epi Week 2

Question 1

True or False: The mosquito in the West Nile Virus cycle is considered to transmit the virus directly.

Answer 1

False. Gordis, Chapter 2, p. 19; the mosquito is consider an indirect mode of transmission of disease.

Question 2

If a large number of individuals are equally exposed to an infectious agent, there may be a broad range of responses, from no infection at all to death.

Answer 2

True.

Question 3

Bird flu killed animals and humans world wide in the first decade of the 2000s. This is an example of…

Answer 3

Pandemic disease. (Worldwide is the operative word.)

Question 4

John Snow, a British scientist, did pioneering work during a cholera outbreak in London in 1854. He identified the cause of the outbreak by:

Answer 4

Determining the water sources of various neighborhoods

Question 5

Herd immunity does not exist when there is…

Answer 5

…indirect transmission

Question 6

The time course of a disease is usually displayed as a/an…

Answer 6

…epidemic curve.

Question 7

Attack rate

Answer 7

number who develop disease / total number of people at risk

Question 8

DESCRIPTIVE epidemiology evaluates

Answer 8

questions related to person, place and time

Question 9

Pertussis (whooping cough) is an acute bacterial respiratory disease that can cause severe coughing, especially in young children. It is a vaccine-preventable disease. Outbreaks of pertussis occurred in several Missouri counties in 2003 and 2004. In Schuyler County, the case rate rose from 0 in 2003 to 695 per 100,000 population in 2004. This is an example of…

Answer 9

…epidemic disease. Gordis, pp. 22-3. The APHA definition is EPIDEMIC which is defined by the occurrence in a community or region of a group of illnesses of similar nature, clearly in excess of normal expectancy, and derived from a common or from a propagated source.

Question 10

ANALYTICAL epidemiology addresses the _______ of a population based question.

Answer 10

why

Question 11

Not every person exposed to a disease will get the disease. This may be due to…

Answer 11

…herd immunity.

Question 12

Campylobacter is a bacterium that causes acutedisease (diarrhea, abdominal pain, malaise, fever, nausea and vomiting). It is usually transmitted through contaminated food, water or raw milk. This disease is in Missouri and throughoutother areasin the US. Each year since 1990, there have been between 535 and 745 cases reported in Missouri. In 2004, cases were reported in 95 counties and the City of St. Louis. This is an example of…

Answer 12

…endemic disease.

Question 13

Epidemiology is the science of the __________ of disease and its __________.

Answer 13

distribution and determinants