Module 2 Epidemiology Flashcards Preview

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Flashcards in Module 2 Epidemiology Deck (15):
1

epidemiology definition

study of natural history and spread of diseases within human and animal populations

2

vector definition

responsible for transmission of parasite/pathogen
(does not transmit the disease)

3

disease definition

response of the host to the parasite

4

parasite definition

organism dependent on host for survival

5

facultative parasite

free living or parasitic form

6

obligate parasite

totally dependent on their host

7

ectoparasite

live outside host

8

endoparasite

live inside host

9

definitive host

parasite reaches maturity within the host (humans the majority of the time)

10

intermediate host

host where some development of parasite occurs
-asexual reproduction
-vector

11

vertical transmission

passage of parasite directly to later life stages (i.e. mother to young)

12

horizontal transmission*

passage between vector and host

13

mechanical transmission

(horizontal transmission)
vector transfers parasites without any parasitic development w/in vector
(vector acquires it then drops it off)

14

biological transmission

(horizontal transmission)
vector transfers parasites in which biological development occurs

15

reasons for emerging vector-borne diseases

1. demography
2. globalization of commerce
3. anthropogenic changes (i.e. climate/urbanization)
4. parasite evolution