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The epidemiology of rotavirus infections: a global perspective
1Department of Paediatrics & Child Health, Faculty of Medicine, University of Natal, Durban, South Africa.
Insights
Rotavirus is a common cause of infantile diarrhea globally. While often mild in newborns, it can affect adults and lead to hospitalizations, with vaccines currently under evaluation.
Area of Science:
- Virology
- Pediatrics
- Epidemiology
Background:
- Rotavirus is the leading cause of infantile diarrhea worldwide.
- Infections can range from asymptomatic in newborns to severe in adults, travelers, and immunocompromised individuals.
- Hospital-acquired rotavirus infections contribute to patient morbidity and healthcare costs.
Purpose of the Study:
- To provide a comprehensive overview of rotavirus infections.
- To discuss the epidemiology, clinical manifestations, and risk factors associated with rotavirus.
- To highlight the current status of rotavirus vaccine development.
Main Methods:
- Literature review of rotavirus epidemiology and clinical features.
- Analysis of rotavirus groups (A, B, C) and their prevalence.
- Examination of age-specific antibody prevalence and vaccine research.
Main Results:
- Rotavirus primarily affects infants aged 6-24 months.
- Disease presentation varies by age, immune status, and exposure.
- Group A rotavirus is most common, but B and C also cause human infections.
- Antibody levels fluctuate significantly from infancy to adulthood.
- Seasonal patterns exist in temperate climates, unlike tropical regions.
Conclusions:
- Rotavirus remains a significant global health concern, particularly for infants.
- Understanding transmission dynamics and host responses is crucial.
- Ongoing vaccine development aims to mitigate the burden of rotavirus disease.
Abstract:
Rotavirus, which is the most common cause of infantile diarrhea worldwide, mainly affects infants between the ages of 6 and 24 months. Most infections in human newborns are mild or asymptomatic, due to the inherently attenuated nature of the "nursery" rotavirus strains. Adults are also sometimes affected, especially those in families with an infected child; the disease also occurs in closed adult communities. HIV-infected persons, travelers, or as a result of water-borne epidemics. Nosocomially acquired hospital infections add to morbidity and to the cost of hospitalization. A winter predominance of rotavirus diarrhea has been noted in temperate climates but not in tropical areas. Group A rotavirus infections are generally more common, but human infections with groups B and C have also been documented. The prevalence of serum antibodies is high during the neonatal period, but it declines sharply between the ages of 3 and 6 months, then rises steeply, peaking at approximately 2 years and remaining high into adulthood. Vaccines against rotavirus are currently under evaluation.