FIG. 1.

Molecular epidemiology of astrovirus infection among children under the age of 3 years in Wuhan City, China. (A) Monthly distribution of astroviruses detected in stool specimens between June 2004 and May 2005. The numbers above the bars indicate the number of samples positive for astrovirus in each month. (B) Detection rates of astrovirus infection in different age groups. The numbers above the bars indicate the percentage of samples positive for astrovirus in each age group. (C) Comparison (percent identity) of Wuhan astrovirus strains (genotype 1, 21 out of 23 strains) with astrovirus strains from other regions in the world.