Week 3 Content

What is Infectivity?

% of exposed that become infected (# of ppl who are exposed that will eventually become infected)

What’s Pathogenicity?

% of ppl that become clinically ill (of the ppl infected, how many of them will become clinically ill=show symptoms)

What’s Virulence

% of clinically ill ppl who will become servilely ill or die.

What is a Carrier?

a person who harbors a specific agent with the absence of discernible clinical disease & can serve as a potential source of infection.

A Carrier is a person who maybe?

• Colonized

• Infected & Asypomtimatic

• preclinical/incubation period

• recover from a acute disease

Is the Carrier Status short or lengthy?

dependent on illness (it can be either)

What’s an Endemic?

is a disease that occurs at it’s regular rate within a time frame that is expected of the disease.

What’s an Epidemic?

is a disease that occurs outside the regular/usual state(rate) of infection. (it’s above what is expected)

What’s a Pandemic?

Happening in multiple countries & contents

What’s sporadic disease?

ideas that happens randomly in population

What’s a Hyperdenmic?

a disease that’s more than a epidemic but doesn’t count as a pandemic.

What are the 13 steps in Outbreak Investigation?

1. Prepare Field work

2. Establish the essence of an outbreak

3. Verify Diagnosis

4. Construct a working case definition

5. Find cases systematically & record info

6. Perform descriptive epidemology

7. Develop Hypothesis

8. Evaluate Hypotheses Epidemiologically

9. As necessary, reconsider, refine & re-evual hypotheses

10. Compare & recline with laboratory &/or environmental studies

11. Implement control & prevention measures

12. Initiate or maintain surveillance

13. communicate findings

In an Outbreak investigation what does step 1. Prepare for Field Work look like?

• scientifically investigate the issue & equipment

• get ready team members & collaborators

In an Outbreak investigation what does step 2. Establish the existence of an outbreak look like?

• cluster vs. outbreak (related or not related)

• How to check the expected

• Take into account factors of: disease, political issues, public relations & timing

In an Outbreak investigation what does step 3. Verifying the Diagnosis look like?

• reviewing clinical/lab results

• visting patients

• summarize clinical features

In an Outbreak investigation what does step 4. Constructing a Working case definition look like?

• a case —> person with the condition

• Having a Clinical deification (illness with sudden onset symptoms)

• Having Laboratory criteria for diagnosis (potisitve tests)

• Working field Case Classification

In an Outbreak investigation what does step 5.Finding cases systematically & record info look like?

• Identifying info

• demographics

• clinics

• risk factors

• reporters

In an Outbreak investigation what does step

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In an Outbreak investigation what does step

In an Outbreak investigation what does step

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In an Outbreak investigation what does step

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In an Outbreak investigation what does step