Abstract
The prevalence and genotype distribution of human TT virus (TTV) in Italy were analysed in 593 subjects at different risk of parenteral infection who included blood donors, patients with chronic type C hepatitis (HCV), thalassemic patients, patients on haemodialysis, human immunodeficiency virus type 1 (HIV-1)-negative intravenous drug users (IVDUs), and HIV-1-infected subjects (IVDUs, heterosexual contacts and homosexual males). Plasma TTV-DNA was detected using nested PCR with primers deduced from the N22 region of the open reading frame 1 (ORF-1) and from the untranslated region (UTR) of the viral genome. Phylogenetic analysis of the sequences obtained from ORF-1 was also undertaken. A high prevalence of plasma TTV-DNA was observed using the UTR primers, with rates varying from 83-100% in the study groups. Using the N22 primers, HIV-1 positive IVDUs and homosexual males, haemodialysed patients and thalassemic patients had a significantly higher TTV prevalence (range: 23.0-86.1%) than blood donors, who displayed a high frequency of positivity (10.6%). Sequence analysis of 127 N22-positive isolates revealed that 42.5% were of type 1, 53.5% of type 2, 2.4% of type 3, and that two isolates (1.6%) were closely related to genotypes 1-2 but distinct from the other major genotypes. TTV-2 was significantly more prevalent in patients at high risk for parenteral infection and in HIV-1 positive homosexuals. In sequential samples from 15 TTV-infected subjects, N22 sequences were detectable persistently in 12 (80.0%) and UTR sequences persisted in all 15 patients over a mean period of 29.6 months. This data indicates that TTV is widespread in Italy in parenterally exposed subjects, and that the infection frequently persists. (C) 2001 Wiley-Liss, Inc.
| Original language | English |
|---|---|
| Pages (from-to) | 76-84 |
| Number of pages | 9 |
| Journal | Journal of Medical Virology |
| Volume | 63 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2001 |
Fingerprint
Keywords
- Blood donors
- HIV-1 positive individuals
- TTV genotypes
ASJC Scopus subject areas
- Virology
Cite this
Molecular epidemiology of TT virus in Italy and phylogenesis of viral isolates from subjects at different risk for parenteral exposure. / Zehender, Gianguglielmo; Manzin, Aldo; De Maddalena, Chiara; Colasante, Chiara; Solforosi, Laura; Corsi, Federica; Bianchi-Bosisio, Anna; Girotto, Mauro; Schirru, Ivan; Russo, Umberto; Galli, Massimo; Clementi, Massimo.
In: Journal of Medical Virology, Vol. 63, No. 1, 2001, p. 76-84.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Molecular epidemiology of TT virus in Italy and phylogenesis of viral isolates from subjects at different risk for parenteral exposure
AU - Zehender, Gianguglielmo
AU - Manzin, Aldo
AU - De Maddalena, Chiara
AU - Colasante, Chiara
AU - Solforosi, Laura
AU - Corsi, Federica
AU - Bianchi-Bosisio, Anna
AU - Girotto, Mauro
AU - Schirru, Ivan
AU - Russo, Umberto
AU - Galli, Massimo
AU - Clementi, Massimo
PY - 2001
Y1 - 2001
N2 - The prevalence and genotype distribution of human TT virus (TTV) in Italy were analysed in 593 subjects at different risk of parenteral infection who included blood donors, patients with chronic type C hepatitis (HCV), thalassemic patients, patients on haemodialysis, human immunodeficiency virus type 1 (HIV-1)-negative intravenous drug users (IVDUs), and HIV-1-infected subjects (IVDUs, heterosexual contacts and homosexual males). Plasma TTV-DNA was detected using nested PCR with primers deduced from the N22 region of the open reading frame 1 (ORF-1) and from the untranslated region (UTR) of the viral genome. Phylogenetic analysis of the sequences obtained from ORF-1 was also undertaken. A high prevalence of plasma TTV-DNA was observed using the UTR primers, with rates varying from 83-100% in the study groups. Using the N22 primers, HIV-1 positive IVDUs and homosexual males, haemodialysed patients and thalassemic patients had a significantly higher TTV prevalence (range: 23.0-86.1%) than blood donors, who displayed a high frequency of positivity (10.6%). Sequence analysis of 127 N22-positive isolates revealed that 42.5% were of type 1, 53.5% of type 2, 2.4% of type 3, and that two isolates (1.6%) were closely related to genotypes 1-2 but distinct from the other major genotypes. TTV-2 was significantly more prevalent in patients at high risk for parenteral infection and in HIV-1 positive homosexuals. In sequential samples from 15 TTV-infected subjects, N22 sequences were detectable persistently in 12 (80.0%) and UTR sequences persisted in all 15 patients over a mean period of 29.6 months. This data indicates that TTV is widespread in Italy in parenterally exposed subjects, and that the infection frequently persists. (C) 2001 Wiley-Liss, Inc.
AB - The prevalence and genotype distribution of human TT virus (TTV) in Italy were analysed in 593 subjects at different risk of parenteral infection who included blood donors, patients with chronic type C hepatitis (HCV), thalassemic patients, patients on haemodialysis, human immunodeficiency virus type 1 (HIV-1)-negative intravenous drug users (IVDUs), and HIV-1-infected subjects (IVDUs, heterosexual contacts and homosexual males). Plasma TTV-DNA was detected using nested PCR with primers deduced from the N22 region of the open reading frame 1 (ORF-1) and from the untranslated region (UTR) of the viral genome. Phylogenetic analysis of the sequences obtained from ORF-1 was also undertaken. A high prevalence of plasma TTV-DNA was observed using the UTR primers, with rates varying from 83-100% in the study groups. Using the N22 primers, HIV-1 positive IVDUs and homosexual males, haemodialysed patients and thalassemic patients had a significantly higher TTV prevalence (range: 23.0-86.1%) than blood donors, who displayed a high frequency of positivity (10.6%). Sequence analysis of 127 N22-positive isolates revealed that 42.5% were of type 1, 53.5% of type 2, 2.4% of type 3, and that two isolates (1.6%) were closely related to genotypes 1-2 but distinct from the other major genotypes. TTV-2 was significantly more prevalent in patients at high risk for parenteral infection and in HIV-1 positive homosexuals. In sequential samples from 15 TTV-infected subjects, N22 sequences were detectable persistently in 12 (80.0%) and UTR sequences persisted in all 15 patients over a mean period of 29.6 months. This data indicates that TTV is widespread in Italy in parenterally exposed subjects, and that the infection frequently persists. (C) 2001 Wiley-Liss, Inc.
KW - Blood donors
KW - HIV-1 positive individuals
KW - TTV genotypes
UR - http://www.scopus.com/inward/record.url?scp=0035215784&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0035215784&partnerID=8YFLogxK
U2 - 10.1002/1096-9071(200101)63:1<76::AID-JMV1012>3.0.CO;2-L
DO - 10.1002/1096-9071(200101)63:1<76::AID-JMV1012>3.0.CO;2-L
M3 - Article
C2 - 11130892
AN - SCOPUS:0035215784
VL - 63
SP - 76
EP - 84
JO - Journal of Medical Virology
JF - Journal of Medical Virology
SN - 0146-6615
IS - 1
ER -