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Method for outbreak investigation Identify source and mode of spread. Interrupt further transmission. Prevent secondary spread. Educate public, healthcare workers and others involved. Introduce future preventative measures. Prosecute: but need epidemiological and microbiological evidence.

In a multistate outbreak investigation, a hypothesis is a guess about the source of the illnesses based on what information is known. Hypothesis generation is an ongoing process during an investigation.

In outbreak investigations, descriptive epidemiology is given one of the key roles. It illustrates an outbreak using the three standard variables , time, place, and person , and makes it possible to set up specific hypotheses about causes and sources of infection and modes of transmission.

The principles of outbreak management are to: Detect and investigate outbreaks of public health importance within a time frame appropriate to the situation? and as a result, limit secondary cases/risks to the public. Manage public health outbreaks in ance with legislation, regulations, standards, and protocols.

Outbreak investigations have essential components as follows: 1) establish case definition(s); 2) confirm that cases are ?real?; 3) establish the background rate of disease; 4) find cases, decide if there is an outbreak, define scope of the outbreak; 5) examine the descriptive epidemiologic features of the cases; 6) ...

Identify investigation team and resources. Establish existence of an outbreak. Verify the diagnosis. Construct case definition. Find cases systematically and develop line listing. Perform descriptive epidemiology/develop hypotheses. Evaluate hypotheses/perform additional studies as necessary. Implement control measures.

If the source of the outbreak is apparent and still a potential threat to public health, appropriate control measures should be taken as quickly as possible. Examples of control measures are closing a restaurant, prohibiting swimming in a certain area, and enacting isolation and quarantine.