Surveillance Flashcards

1
Q

Monitoring

A
  • objective is to identify changes
  • ex: parameters of patient
  • effort: needs some resources, needs some money
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2
Q

Salmonella in Livestock

A
  • If you have 3 cows (echo) from the same farm at the same time- wouldn’t count them as separate incidences
  • increase or change in pattern?
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3
Q

Salmonella in Humans

A
  • each color is different serovars
  • minor drop in number of human cases
  • not all serovars decrease equally
  • There is no clear parallel in decreasing trend in humans and livestock in recent years! - there may be in humans and poultry
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4
Q

Weekly Consultation Rates

A
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5
Q

Surveillance

A
  • Includes action to be taken when change is noted
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6
Q

Target for Clinical Mastitis

A
  • 30 cases/100 cows/year
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7
Q

Objectives of Surveillance

A
  • can modify targets and thresholds of when you take action depending on the farm
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8
Q

Potential Changes to BSE changes

A
  • should we change the way we do surveillance?
  • did a cost effective analysis - not necessarily about saving money but about cost relocation
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9
Q

Surveillance of the Individual Farm

A
  • Largely focus on productivity - use productivity measures often
  • data is reliant on the data record system
  • and feedback to the farmer
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10
Q

Farm Level Surveillance Systems

A
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11
Q

Monitoring/Surveillance levels and objectives

A
  • ex: wildlife in U.S. - carries out surveys of wildlife and has cases of emergency in wildlife where we need to respond
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12
Q

Case Definition

A
  • recording occurences, but need to be clear and consistent in what we are recording or else it is useless
  • Using clinical criteria to define the cases
  • must use practical and pragmatic case definition (shrimp example)
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13
Q

Background - Outbreaks

A
  • can have several outbreaks as part of one epidemic
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14
Q

Monitoring and Surveillance:

Results

A
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15
Q

Incidence

A

ex: 30 cases of clinical mastitis/100 cows/year
* incience is about new cases where as prevelance is about all cases

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16
Q

Prevalence

A
17
Q

Validity of Results

A

*

18
Q

Internal Validity

A
  • is the results of the test what is actually occurring within the cows?
19
Q

External Validity

A
20
Q

Active and Passive Monitoring and Surveillance

A
  • passive: we wait for farmers to tell us, but this is much more subjective to be biased. Ex: some farmers will not report abortions and some will upon request and therefore it is biased
  • Active: more expensive but less biased
21
Q
A