What are the 4 steps of an outbreak investigation?
Table of Contents
What are the 4 steps of an outbreak investigation?
Although the steps are listed sequentially, they may occur simultaneously.
- Verify the diagnosis and confirm the outbreak.
- Define a case and conduct case finding.
- Tabulate and orient data: time, place, person.
- Take immediate control measures.
- Formulate and test hypothesis.
- Plan and execute additional studies.
What are 3 things an epi curve can tell you about an outbreak?
What an Epi Curve Can Tell You
- Time trend of the outbreak, that is, the distribution of cases over time.
- “Outliers,” or cases that stand apart from the overall pattern.
- General sense of the outbreak’s magnitude.
- Inferences about the outbreak’s pattern of spread.
- Most likely time of exposure.
What are the 10 steps of an outbreak investigation?
Identify investigation team and resources.
How do you investigate an outbreak of disease?
Section 2: Steps of an Outbreak Investigation
- Prepare for field work.
- Establish the existence of an outbreak.
- Verify the diagnosis.
- Construct a working case definition.
- Find cases systematically and record information.
- Perform descriptive epidemiology.
- Develop hypotheses.
- Evaluate hypotheses epidemiologically.
What are the principles of outbreak investigation?
The investigation includes the following steps: establishing the existence of the outbreak; defining the disease; finding cases; describing cases by time, place, and person characteristics; establishing a hypothesis related to the mode of occurrence; testing the hypotheses; conducting an environmental investigation; …
How do you read an epi curve?
Identify the peak of the outbreak, which is the time period then the largest number of cases occurred. Count back from the peak, the average incubation period for disease. Note that date. Identify the earliest case in the outbreak and count back the minimum incubation period.
What are the three main sources of an epidemic?
Epidemics of infectious disease are generally caused by several factors including a change in the ecology of the host population (e.g., increased stress or increase in the density of a vector species), a genetic change in the pathogen reservoir or the introduction of an emerging pathogen to a host population (by …
What does an outbreak investigation include?
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) …
When do you investigate an outbreak?
The primary reason for conducting outbreak investigations is to identify the source in order to establish control and to institute measures that will prevent future episodes of disease. They are also sometimes undertaken to train new personnel or to learn more about the disease and its mechanisms for transmission.
What is the key principle of outbreak management?
The first key principle of outbreak management is to recognise an outbreak and establish that it actually exists. Then establishing a case definition for cases in the outbreak to assist with determining further infections. Precautions should commence as soon as the first resident shows symptoms of suspected infection.