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Titolo:
Prevalence and genotype distribution of TT virus in various specimen typesfrom thalassaemic patients
Autore:
Chan, PKS; Chik, KW; Li, CK; Tang, NLS; Ming, MSK; Cheung, JLK; Ng, KC; Yuen, PMP; Cheng, AF;
Indirizzi:
Chinese Univ Hong Kong, Prince Wales Hosp, Dept Microbiol, Shatin, Hong Kong, Peoples R China Chinese Univ Hong Kong Shatin Hong Kong Peoples R China Peoples R China Chinese Univ Hong Kong, Prince Wales Hosp, Dept Paediat, Shatin, Hong Kong, Peoples R China Chinese Univ Hong Kong Shatin Hong Kong Peoples R China Peoples R China Chinese Univ Hong Kong, Prince Wales Hosp, Dept Chem Pathol, Shatin, Hong Kong, Peoples R China Chinese Univ Hong Kong Shatin Hong Kong Peoples R China Peoples R China
Titolo Testata:
JOURNAL OF VIRAL HEPATITIS
fascicolo: 4, volume: 8, anno: 2001,
pagine: 304 - 309
SICI:
1352-0504(200107)8:4<304:PAGDOT>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
MARROW TRANSPLANT RECIPIENTS; DNA VIRUS; UNKNOWN ETIOLOGY; LIVER-DISEASES; BLOOD-DONORS; G-HEPATITIS; INFECTION; CELLS; POPULATIONS; HUMANS;
Keywords:
epidemiology; genotype; thalassaemia; TT virus; transmission; tropism;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
22
Recensione:
Indirizzi per estratti:
Indirizzo: Chan, PKS Chinese Univ Hong Kong, Prince Wales Hosp, Dept Microbiol, Shatin, Hong Kong, Peoples R China Chinese Univ Hong Kong Shatin Hong Kong Peoples R China China
Citazione:
P.K.S. Chan et al., "Prevalence and genotype distribution of TT virus in various specimen typesfrom thalassaemic patients", J VIRAL HEP, 8(4), 2001, pp. 304-309

Abstract

Peripheral blood mononuclear cells (PBMC), plasma, saliva and urine samples were collected from 50 thalassaemic patients for TT virus (TTV) detectionby two sets of PCR. The set B nested PCR was more sensitive than the widely used NG hemi-nested PCR with TTV positive rates approximate to PBMC: 98% vs. 70%; plasma: 92% vs. 66%; saliva: 62% vs. 22%; urine: 22% vs. 6%. All 50 patients had TTV detected in one or more specimens, with 16% of patients being positive in all four specimen types: 40% positive in PBMC, plasma andsaliva; 30% positive in PBMC and plasma. In 82 NG hemi-nested PCR-positivesamples TTV genotype was identified, 68.3% had a single genotype, 25.6% had multiple genotypes and 6.1% were uncharacterized. The positive rates for genotypes by specimen were: G1 (36/82), G2 (49/82), G3 (2/82), G4 (7/82), G5 (1/82) and G6 (3/82). Among the 42 patients for whom the genotype was examined, 42.9% had single-type infection, 45.2% had co-infections and 11.9% had uncharacterized genotypes. Sixteen of them had TTV detected both in PBMCand plasma with seven having identical genotypes in both samples. Eight patients had TTV detected in PBMC, plasma and saliva; two of them harboured identical genotypes in all three samples. The results indicate that, apart from hepatocytes, PBMC is a major cell type for TTV infection occurs. Shedding of TTV in urine and saliva is common and may have a significant role in nonblood-borne transmission among the general population. TTV-infected patients often harbour multiple genotypes suggesting infection with one genotype does not necessarily confer protection against the others. No correlationbetween TTV infection and liver dysfunction was observed.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/09/20 alle ore 20:41:16