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Rotavirus epidemiology and surveillance
U Desselberger1, M Iturriza-Gómara, J J Gray
1Clinical Microbiology and Public Health Laboratory, Addenbrooke's Hospital, Cambridge, CB2 2QW, UK.
Novartis Foundation Symposium
|July 11, 2001
Summary
Human rotaviruses exhibit significant diversity in G and P types, with changing prevalence over time and location. Monitoring these diverse rotavirus strains is crucial for understanding transmission and developing effective vaccines.
Area of Science:
- Virology
- Molecular Epidemiology
- Public Health
Background:
- Human rotaviruses display extensive antigenic and genomic diversity, circulating globally.
- They are classified into groups (A-G), subgroups, and types based on glycoprotein VP7 (G types) and protein VP4 (P types).
- Over 20 P types and 14 G types exist, with at least 10 G and 11 P types found in humans.
Purpose of the Study:
- To investigate the complex molecular epidemiology of human rotaviruses.
- To understand the circulation patterns and emergence of different rotavirus G and P types.
- To inform surveillance strategies and vaccine development.
Main Methods:
- Utilized a dual classification system (G and P typing) to analyze rotavirus diversity.
- Investigated co-circulation and reassortment of different rotavirus G/P types.
- Examined point mutations for lineage and sublineage classification.
Main Results:
- Multiple G and P types of rotaviruses co-circulate, with common types including G1P1A[8], G2P1B[4], G3P1A[8], and G4P1A[8].
- Incidence rates of rotavirus types vary geographically and temporally, with natural reassortment creating new constellations.
- Emergence of uncommon types may result from animal reassortment or direct introduction.
Conclusions:
- Continuous surveillance of rotavirus types globally is essential for monitoring emerging strains and constellations.
- Understanding rotavirus diversity and transmission dynamics is critical for assessing the impact of future vaccines.
- Further research is needed to establish the significance of group B and C rotavirus infections.