Gastroenteritis in infants
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Causes and Risk Factors of Gastroenteritis in Infants
Gastroenteritis in infants is a significant health concern worldwide, with viruses such as rotavirus, norovirus, and caliciviruses (including Norwalk and Sapporo viruses) being the most common causes, followed by bacterial agents like pathogenic E. coli, Campylobacter, and Salmonella species De Luca2018Nakata2000Gholam2020+1 MORE. Enteric adenoviruses are also recognized as important causes, particularly in hospitalized infants, and are often associated with prolonged diarrhea and respiratory symptoms . The risk of gastroenteritis is influenced by factors such as lack of breastfeeding, poor hygiene, contaminated food or water, and inadequate maternal care practices De Luca2018Siahaan2018Obladen2024.
Protective Factors and Prevention
Breastfeeding provides significant protection against gastroenteritis in newborns due to passive maternal immunity and reduced exposure to contaminated food and water De Luca2018Obladen2024. Proper maternal dietary and health care practices, as well as timely immunization, are strongly associated with a lower incidence of gastroenteritis in infants . Historical and modern evidence highlights the importance of hygienic food preparation, including the pasteurization of milk, to prevent foodborne infections .
Clinical Presentation and Diagnosis
The symptoms of gastroenteritis in infants typically include diarrhea, vomiting, fever, and loss of appetite, with severity ranging from mild, self-limiting illness to life-threatening dehydration De Luca2018Gholam2020. In some cases, especially with enteric adenovirus infections, respiratory symptoms and conjunctivitis may also be present . Diagnosis is primarily clinical, with laboratory investigations reserved for severe or atypical cases Gholam2020Guarino2014.
Management and Treatment Strategies
The cornerstone of gastroenteritis management in infants is the assessment and rapid correction of dehydration, primarily through oral rehydration therapy using hypoosmolar solutions De Luca2018Gholam2020Guarino2014. Breastfeeding should be continued, and regular feeding should not be interrupted, even during illness Fox1990Guarino2014. In non-breastfed infants, lactose-free feeds may be considered if lactose intolerance develops after refeeding Fox1990Guarino2014. Antibiotics are generally reserved for cases with systemic symptoms, severe dehydration, or bloody diarrhea De Luca2018Gholam2020. Probiotics such as Lactobacillus GG or Saccharomyces boulardii, as well as agents like diosmectite or racecadotril, may help reduce the duration and severity of diarrhea .
Microbiota Changes and Co-infections
Acute gastroenteritis in infants can alter the intestinal microbiota, with increases in potentially pathogenic bacteria such as Streptococcus and Enterococcus species observed after rotavirus and norovirus infections . Co-infections with multiple viruses, including rotavirus, norovirus, and astrovirus, are not uncommon and may complicate the clinical course .
Conclusion
Gastroenteritis remains a major cause of illness in infants, with viral agents being the predominant cause. Prevention through breastfeeding, good hygiene, and immunization is crucial. Early recognition, prompt rehydration, and continued feeding are key to effective management, while antibiotics and other interventions are reserved for specific cases. Ongoing attention to maternal care practices and food safety can further reduce the burden of this disease in infants De Luca2018Siahaan2018Obladen2024+7 MORE.
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