| molecular epidemiology of hepatitis a in st. petersburg, russia, 1997-2003. | the molecular epidemiology of hepatitis a virus (hav) strains circulating in the st. petersburg and karelia regions was studied during 1997-2003. hepatitis a virus rna was isolated from both clinical samples (stools or sera) and environmental samples (sewage water). rt-pcr was carried out using different primer pairs from the vp1/2a and vp1 genomic regions, the variable parts of the hav genome. pcr products were sequenced and 306 nucleotides from the vp1/2a and 332 nucleotides from the vp1 regio ... | 2007 | 17457910 |