Criteria for Outbreak of Norwalk (Norovirus) Gastroenteritis

Purpose: To evaluate an outbreak of gastroenteritis for features suggesting Norwalk agent (norovirus) based on the criteria of Kaplan et al.

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Evaluation

Are you evaluating an outbreak of gastroenteritis?

Yes

Number of people who are symptomatic

Mean of incubation periods

Number of symptomatic patients with vomiting

Duration of illness

Has an enteric pathogen been isolated in bacterial stool culture of affected persons?

Yes

Results

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Results Interpretation and Description References Next Steps

Data complete?

Evaluation appropriate?

Percent of symptomatic people with vomiting

Number of criteria met

Should Norwalk agent (norovirus) be suspected as the cause of the outbreak?

Caution: A qualified health practitioner should verify all results.
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Interpretation and Description

References

Next Steps in Evaluation

Diagnosis

Risk Factors
- Risk Factors for Acute Gastroenteritis Associated with Caliciviruses (Norwalk Agent)
Clinical Diagnosis, Including Family History For Genetics
- Rotavirus Gastroenteritis Clinical Severity Score
- Diarrhea-to-Vomiting Prevalence Ratio (D/V Ratio) During Outbreak of Acute Gastroenteritis
Other Testing
- Diarrhea-to-Vomiting Prevalence Ratio (D/V Ratio) During Outbreak of Acute Gastroenteritis
Criteria For Diagnosis
- Rotavirus Gastroenteritis Clinical Severity Score

Specialty

Infectious Diseases
Surgery, general
Gastroenterology

Objective

criteria for diagnosis

ICD-10

A08.1 - Acute gastroenteropathy due to Norwalk agent
A09 - Other gastroenteritis and colitis of infectious and unspecified origin

Info

Purpose: To evaluate an outbreak of gastroenteritis for features suggesting Norwalk agent (norovirus) based on the criteria of Kaplan et al.

Specialty: Infectious Diseases, Surgery, general, Gastroenterology

Objective: criteria for diagnosis

ICD-10: A08.1, A09,

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