Viral Gastroenteritis Causes and Characteristics

Viral Pathogens

Rotavirus is the most common cause of severe diarrhea among children, with approximately 3.5 million cases occurring each year in the United States, and by age 4, most children have been infected and developed immunity to severe disease, with peak incidence among children 6 months to 2 years of age 1
Norovirus is the most common viral cause of gastroenteritis outbreaks among adults, and norovirus and Salmonella are the leading pathogens among the 24 gastroenteritis pathogens transmissible by food in the United States 2, 3
Enteric adenoviruses, primarily serotypes 40 and 41, contribute to 5-20% of hospitalizations for childhood diarrhea in developed countries, with peak incidence among children less than 2 years of age 4
Astrovirus is one of the common viral pathogens affecting the gastrointestinal tract, particularly in children 6

Salmonella enterica subspecies is one of the leading bacterial causes of gastroenteritis, exceeding norovirus as a cause of hospitalization and death 2
Campylobacter is a common bacterial pathogen causing gastroenteritis, accounting for approximately 28% of bacterial gastroenteritis cases in children under 5 years 2
Shigella accounts for about 21% of bacterial gastroenteritis cases in children under 5 years in the United States 2

Common symptoms of viral gastroenteritis outbreaks include nausea, abdominal cramps, vomiting, diarrhea, headache, fever, chills, myalgias, and sore throat 3
The average incubation period for Norwalk virus outbreaks is 24-48 hours and the average duration of illness is 12-60 hours 3
Transmission routes include person-to-person contact, contaminated food and water, aerosol transmission, and fomites 1, 3, 5, 7

Proper handwashing with soap and water for at least 20 seconds is essential to prevent transmission, as recommended by the Centers for Disease Control and Prevention 5
Proper disinfection of contaminated surfaces with chlorine bleach solution is necessary to prevent transmission, as recommended by the Centers for Disease Control and Prevention 5
Exclusion of ill food handlers until 48-72 hours after symptom resolution is recommended to prevent transmission, as recommended by the Centers for Disease Control and Prevention 5
Isolation of ill residents in institutional settings for 24-48 hours after symptom resolution is recommended to prevent transmission, as recommended by the Centers for Disease Control and Prevention 5