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Nonbacterial gastroenteritis
Abstract:
Significant progress has been made toward determining the agents of acute, infectious, nonbacterial gastroenteritis. Two distinct types of viruses have been implicated. One of these, a particle about 27 nm in diameter, is involved in the acute epidemic form of the disease of short duration. The other, a 70-nm virus, is rarely involved in acute epidemic gastroenteritis, but it has been associated worldwide with infantile diarrhea and is responsible for a considerable proportion of all nonbacterial diarrheal illness in infants. Experiments with the 70-nm virus have induced disease in newborn piglets, calves, and rhesus monkeys. In addition, this human virus has been antigenically related to four other viruses, three of which cause gastroenteritis in their natural animal host.
Insights
Researchers identified two distinct viruses causing infectious gastroenteritis. A 70-nm virus is a significant cause of infant diarrhea and can induce illness in animal models.
Area of Science:
- Virology
- Infectious Diseases
- Gastroenterology
Background:
- Acute, infectious, nonbacterial gastroenteritis remains a significant public health concern.
- Identifying causative agents is crucial for developing effective prevention and treatment strategies.
Purpose of the Study:
- To elucidate the viral agents responsible for acute, infectious, nonbacterial gastroenteritis.
- To characterize the distinct viral types implicated in human gastroenteritis.
Main Methods:
- Characterization of viral particles based on size (27 nm and 70 nm).
- Observation of disease association in human populations (epidemic gastroenteritis, infantile diarrhea).
- Experimental induction of disease in animal models (piglets, calves, rhesus monkeys) using the 70-nm virus.
Main Results:
- Two distinct viral agents implicated: a 27-nm virus in acute epidemic gastroenteritis and a 70-nm virus in infantile diarrhea.
- The 70-nm virus is a major contributor to nonbacterial diarrheal illness in infants globally.
- The 70-nm virus successfully induced disease in newborn piglets, calves, and rhesus monkeys.
- Antigenic relationship established between the human 70-nm virus and four other viruses, including three animal gastroenteritis viruses.
Conclusions:
- Significant progress has been made in identifying viral causes of nonbacterial gastroenteritis.
- The 70-nm virus is a key pathogen in infantile diarrhea and shares antigenic properties with other animal viruses, suggesting potential zoonotic links.