Genetic characterization of rotavirus in children in South Korea from 2007 to 2009

Area of Science:

• Virology
• Epidemiology
• Public Health

Background:

• Rotavirus is a primary cause of acute gastroenteritis (AGE) in children globally.
• The introduction of rotavirus vaccines necessitates continuous monitoring of circulating strains for effective infection control.
• Understanding prevalent rotavirus genotypes is essential for assessing vaccine effectiveness and public health strategies.

Purpose of the Study:

• To monitor and characterize rotavirus strains detected in children hospitalized with AGE in Seoul, Korea, between 2007 and 2009.
• To identify shifts in dominant rotavirus genotypes following the implementation of a rotavirus vaccine.
• To provide data supporting ongoing surveillance for rotavirus infection control and vaccination programs.

Main Methods:

• Collection and typing of 139 rotavirus strains from hospitalized children with AGE.
• Genotyping of G and P serotypes using molecular methods.
• Phylogenetic analysis of G1, G2, G3, and G9 strains to determine lineage clustering.

Main Results:

• The most common rotavirus genotype combination was G9P[8] (32.1%), followed by G1P[8] (20.7%) and G3P[8] (11.7%).
• A notable shift in predominant genotypes occurred: G9 predominated in 2007-2008, while G1 and G3 became dominant in 2008-2009.
• Mixed G-type infections were found in 10.0% of samples, and mixed P-type infections in 4.3%.

Conclusions:

• A rapid change in prevalent rotavirus genotypes (from G9 to G1 and G3) was observed in Seoul, Korea.
• Continuous surveillance of rotavirus strains is critical for effective rotavirus vaccination strategies and public health management.
• The findings underscore the dynamic nature of rotavirus epidemiology and the importance of post-vaccination surveillance.