Research Article

Occult Hepatitis B Infection among Hemodialysis Patients in Tabriz, Northwest of Iran: Prevalence and Mutations within the S Region

Table 1

Primer sets for the detection of OBI through nested PCR.

HBV S regionNucleotide position (HBV)Fragment size (bp)

Ex: S1-F: 5′-CATCAGGATTCCTAGGACCCCT-3′[168–189]290
Ex: S4-R: 5′-AGGACAAACGGGCAACATAC-3′[478–458]
In: S2-F: 5′-CTTGTTGACAAGAATCCTCACA-3′[214–235]227
In: S3-R: 5′-CCAACAAGAAGATGAGGCATA-3′[442–420]

Ex, external sequence; In, internal sequence; HBV, hepatitis B virus; bp, base pair; F, forward strand; R, reverse strand.