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Epidemiology > 1. Disease Reservoirs > Flashcards

1. Disease Reservoirs Flashcards

1
Q

Disease transmission is a result of the interaction between what 3 things

A

host, agent, and environment

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2
Q

Habitat in which an infectious agent normally lives, grows, and multiplies

A

Reservoir

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3
Q

_____ maintain pathogens over time, from year to year or generation to generation

A

Reservoirs

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4
Q

What are the 3 questions to ask if determining a reservoir

A
  1. Is it naturally infected with the pathogen
  2. Can the species of animal maintain the pathogen over time?
  3. Can this source transmit the dz to a new susceptible host?
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5
Q

What are the two forms of vertical transmission?

A
  1. Transplacental

2. perinatal

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6
Q

What are the 2 forms of horizontal transmission?

A
  1. Direct

2. Indirect

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7
Q

What are the two subcategories of direct transmission?

A
  1. projection

2. Contact

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8
Q

What are the two subcategories of Indirect transmission

A
  1. vehicle

2. vector

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9
Q

What are the two forms of vehicle transmission?

A
  1. common vehicle

2. fomite

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10
Q

What are the two forms of vector transmission?

A
  1. Biological vector

2. Mechanical vector

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11
Q

Type of transmission where reservoir transmits to it’s offspring?

A

vertical

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12
Q

Vertical transmission where pathogen crosses the placenta

A

Congenital

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13
Q

vertical transmission where pathogen infects host during parturition or colostrum

A

Perinatal

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14
Q

Transmission of pathogen from the reservoir to a new host

A

horizontal

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15
Q

horizontal transmission from the reservoir directly to a susceptible host

A

Direct

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16
Q

Transmission from reservoir via any sort of intermediary, animate or inanimate object

A

Indirect

17
Q

An inanimate object which serves to communicate disease

A

Vehicle

18
Q

A living org. that serves to communicate disease

A

vector

19
Q

food and water are consided what type of vehicle?

A

common

20
Q

Object that can be contaminated and transmit disease on a limited scale

A

Fomites

21
Q

T/F vectors are live organisms?

A

T

22
Q

T/F. most vectors are arthropods?

A

T

23
Q

What is a mechanical vector?

A

the agent doesnt multiply or undergo part of its life cycle while in/ on the arthropod

24
Q

What is a biological vector?

A

the agent undergoes changes or multiplies while in the vector, these activities are required for transmission

Epidemiology (8 decks)

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