Viral Epidemiology

Question 1

what is the study of health and disease that occurs in a population or subpopulation

Answer 1

epidemiology

Question 2

what is the frequency of a disease in a population in a specific period of time

Answer 2

incidence

Question 3

what is the frequency of a disease in a population at a moment in time

Answer 3

prevalence

Question 4

what is the percentage of animals that get sick of a particular disease

Answer 4

morbidity

Question 5

what is the percentage of animals that die from a particular disease

Answer 5

mortality

Question 6

what is the number of cases that exceed the expected number for a particular disease

Answer 6

epidemic

Question 7

what is the expected or continuous occurrence of a particular disease in a population

Answer 7

endemic

Question 8

which mode of transmission occurs from one susceptible host to another by direct or direct contact

Answer 8

horizontal transmission

Question 9

what are ways for horizontal transmission

Answer 9

direct contact
indirect contact
common-vehicle
air-borne
arthropod-borne
latrogenic
nosocomial

Question 10

which mode of transmission is from parent to offspring including during gestation, birth or after birth

Answer 10

vertical transmission

Question 11

describe RO number

Answer 11

number of infected people coming from 1 infected person

Question 12

what are 2 factors that can influence RO number

Answer 12

population density
naive to virus

Question 13

what type of disease can be transmitted from vertebrate animals to man

Answer 13

zoonotic

Question 14

what type of disease occurs when an insect vector is involved and the virus replicates in the vector

Answer 14

arboviral disease

Question 15

true or false:
all arthropod-transmitted diseases are arboviral diseases

Answer 15

false
in order to be an arboviral disease, the virus must replicate within the arthropod

Question 16

true or false:
all arboviral diseases are zoonotic

Answer 16

false
a disease between just the arthropod and human is not zoonotic

Question 17

what are the 4 patterns of disease

Answer 17

acute self-limiting infection
persistent infection
vertical transmission
arthropod borne transmission

Question 18

true or false:
viral infections can be influenced based on seasonality

Answer 18

true

Question 19

what are the 7 requirements for surveillance based on clinical cases

Answer 19

1. occurrence
2. sufficient severity
3. availability of care
4. capability of diagnosis
5. lab supported diagnosis
6. reporting of disease
7. collection and analysis of data

Question 20

what are the 3 requirements of laboratory based surveillance

Answer 20

1. scientific source of information
2. coherent and consistent trends
3. qualitative detail information

Question 21

what actions can occur to control disease

Answer 21

hygiene and sanitation
agent elimination
control transmission
protect the patient
change animal production patterns