Epidemiology and outbreak control

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Epidemiology and outbreak control by Mind Map: Epidemiology and outbreak control

1. makes it difficult to control virus

2. Epidemiology

2.1. health-event patterns

2.2. methods in public health

2.3. determines risk of disease

2.4. determines treatment and preventive strategies

3. Info used to study viral epidemiology

3.1. virus

3.1.1. disease syndrome (fever, encephalitis)

3.1.2. virulence (subclinical, mild, severe, fatal)

3.1.3. genetic and antigenic variation (influenza)

3.1.4. transmissability (highly, poorly infectious)

3.2. host

3.2.1. innate

3.2.2. acquired

3.2.3. population

3.3. enviro

3.3.1. climate (seasonality)

3.3.2. vector/reservoir host breeding

3.3.3. virus survival (enveloped and unenveloped)

3.3.4. Geography

3.4. behavioural

3.4.1. socio-economic

3.4.2. personal hygeine

3.4.3. travel habits

3.4.4. cultural religious

3.4.5. safe sex

3.5. ecological

3.5.1. human-human

3.5.2. zoonosis

3.5.3. vector-borne

4. National Notifiable Disease Surveillance System

4.1. incidence

4.1.1. vs prevalence

4.2. endemic

4.2.1. epidemic

4.2.1.1. pandemic

4.3. 1990

4.4. monitor agreed list of communicable diseases

4.5. detects epidemics/pandemics

4.6. data sent electronically

4.6.1. 65 notifiable diseases (~25 are viruses)

4.6.1.1. ref #

4.6.1.2. state

4.6.1.3. disease code

4.6.1.4. Categories

4.6.1.4.1. Zoonoses (Lyssavirus)

4.6.1.4.2. Gastrointestinal (Hep A)

4.6.1.4.3. Vector-borne diseases: arboviruses

4.6.1.4.4. Quarantineable (Yellow fever)

4.6.1.4.5. Vaccine preventable (Influenza)

4.6.1.4.6. Bloode-borne (Hep B)

4.6.1.5. date of onset

4.6.1.6. date of notification

4.6.1.7. sex, age, indigenous status, postcode

5. Outbreaks

5.1. disease with greater than expected morbidity or mortality

5.2. greater than background (as determined by surveillance data)

5.3. epidemiological link (same place, time)

5.3.1. index case

6. Investigating outbreaks (criteria)

6.1. stages

6.1.1. better diagnoses or actual outbreak?

6.1.1.1. .

6.1.1.1.1. .

6.1.1.1.2. ,

6.1.1.1.3. .

6.2. example (West Nile 99 NY)

6.2.1. 6 patients

6.2.2. death of exotic birds

6.2.3. high mort in crows (amplifying host with arbovirus)

6.2.4. West Nile (Flavi) detected

6.2.5. morbidity 20% (had disease)

6.2.6. how was WNV introduced?

6.2.6.1. genetics

6.2.6.2. bird migration or smuggling?