| [investigation on tt virus infection among various populations in shenzhen]. | a polymerase chain reaction assay with nested primers (nested pcr) deduced from the well conserved sequences of ttv orf1 region was established to detect ttv dna. pcr products from the 2 patients with non a-g hepatitis were cloned and sequenced to confirm its specificity. by using this assay, we tested the serum samples of 90 normal individuals, 88 paid blood donors, 79 intravenous drug users and 29 patients with non a-g hepatitis in shenzhen, china. the positive rates of ttv dna were 7.8%, 9.0% ... | 1998 | 12526325 |
| mother-to-infant vertical transmission of transfusion transmitted virus in south china. | a nested pcr was used to detect ttv dna in serum from 490 mother-infant pairs to determine the rate of vertical transmission of ttv in guangzhou city, p.r. china. ttv dna was positive in 87 mothers and 12 of their babies, giving a prevalence of 17.8% in pregnant women and a mother-to-child transmission rate of 13.8%. in eight mother-infant pairs, ttv dna nucleotide sequences from the mothers and their corresponding infants were identical. the homology of guangzhou ttv and japanese ttv ranged fro ... | 2004 | 15493715 |