AIM: To determine the frequencies of HGV and TTV infectionsin serum and saliva samples of non-hepatitis patients withoral diseases in Hangzhou area, and to understand thecorrelation between detected results of HGV RNA...AIM: To determine the frequencies of HGV and TTV infectionsin serum and saliva samples of non-hepatitis patients withoral diseases in Hangzhou area, and to understand thecorrelation between detected results of HGV RNA and/or TTVDNA in sera and in saliva from the same patientsMETHODS: RT-nested PCR for HGV RNA detection andsemi-nested PCR for nv DNA detection were performed inthe serum and saliva samples from 226 non-hepatitis patientswith oral diseases, and nucleotide sequence analysis.RESULTS: Twenty-seven (11.9 %) and 21 (9.3 %) of the226 serum samples were only positive for HGV RNA andlrv DNA, respectively. 10 (4.4 %) and 9 (3.9 %) of the226 saliva samples were only positive for HGV RNA andTTV DNA, respectively. And 7 (3.1%) of the serum samplesand 2 (0.9 %) of the saliva samples showed the positiveamplification results for both HGV RNA and Irv DNA. 12saliva samples from the 34 patients (35.3 %) with HGV orHGV/TTV viremia and 11 saliva samples from the 28 patients(39.3 %) with TTV or HGV/TTV viremia were HGV RNAdetectable, respectively, including two patients positive forboth HGV RNA and TTV DNA in serum and saliva samples.No saliva samples from the 226 patients were found to beHGV RNA or nv DNA detectable while their serum sampleswere negative for HGV or TTV. Homologies of the nucleotidesequences of HGV and TTV amplification products from theserum and saliva samples of the two patients comparedwith the reported sequences were 88.65-91.49 % and65.32-66.67 %, respectively. In comparison with thenucleotide sequences of amplification products betweenserum and from saliva sample from any one of the twopatients, the homologies were 98.58 % and 99.29 % forHGV, and were 98.65 % and 98.20 % for rTV, respectively.CONCLUSION: Relatively high carrying rates of HGV and/or TTV in the sera of non-hepatitis patients with oral diseasesin Hangzhou area are demonstrated. Parts of the carriersare HGV and/or TTV positive in their saliva. The results ofthis study indicate that dentists may be one of the populationswith high risk for HGV and/or TTV infection, and by way of saliva HGV and TTV may be transmitted among individuals.展开更多
Objective To detect the virus in the feces and sera of patients in an outbreak of enterically transmitted non-A,non-E hepatitis,and this review covers the epidemiologic features and experimental infection of this nove...Objective To detect the virus in the feces and sera of patients in an outbreak of enterically transmitted non-A,non-E hepatitis,and this review covers the epidemiologic features and experimental infection of this novel virus.Data sources Data sources come from our own work on this subject,published and unpublished.Study selection Mainly our own work is included,and related literature is collected.Results In an outbreak of enterically transmitted non-A-E hepatitis among students,a total of 381 cases (60.7%)were documented.Viral fragments identical to transfusion transmitted virus(TTV)were detected in both serum and stool samples.Asymptomatic virus carriers among the staff had positive serum(32.1%)and feces(24.6%),clearly a potential source of infection.This viral infection prevalence in 2 remote villages in northern and southern China was 9.2% and 10.6%,respectively,suggesting that China is an endemic area.In this study,groups of 3 Rhesus monkeys were infected via oral or intravenous inoculation with patient feces.Two additional monkeys were infected by passage.The virus was detected in serum,peripheral blood mononuclear cell(PBMC),liver,spleen and small intestine,while the virus positive single strand,which might be a replicative intermediate,was only in liver,intestine and PBMC of all animals.Conclusions This nonenveloped DNA virus might be transmitted both by blood and enteric routes.Considering its wide distribution and high prevalence,we suppose that nonparenteral transmission is more important.展开更多
文摘AIM: To determine the frequencies of HGV and TTV infectionsin serum and saliva samples of non-hepatitis patients withoral diseases in Hangzhou area, and to understand thecorrelation between detected results of HGV RNA and/or TTVDNA in sera and in saliva from the same patientsMETHODS: RT-nested PCR for HGV RNA detection andsemi-nested PCR for nv DNA detection were performed inthe serum and saliva samples from 226 non-hepatitis patientswith oral diseases, and nucleotide sequence analysis.RESULTS: Twenty-seven (11.9 %) and 21 (9.3 %) of the226 serum samples were only positive for HGV RNA andlrv DNA, respectively. 10 (4.4 %) and 9 (3.9 %) of the226 saliva samples were only positive for HGV RNA andTTV DNA, respectively. And 7 (3.1%) of the serum samplesand 2 (0.9 %) of the saliva samples showed the positiveamplification results for both HGV RNA and Irv DNA. 12saliva samples from the 34 patients (35.3 %) with HGV orHGV/TTV viremia and 11 saliva samples from the 28 patients(39.3 %) with TTV or HGV/TTV viremia were HGV RNAdetectable, respectively, including two patients positive forboth HGV RNA and TTV DNA in serum and saliva samples.No saliva samples from the 226 patients were found to beHGV RNA or nv DNA detectable while their serum sampleswere negative for HGV or TTV. Homologies of the nucleotidesequences of HGV and TTV amplification products from theserum and saliva samples of the two patients comparedwith the reported sequences were 88.65-91.49 % and65.32-66.67 %, respectively. In comparison with thenucleotide sequences of amplification products betweenserum and from saliva sample from any one of the twopatients, the homologies were 98.58 % and 99.29 % forHGV, and were 98.65 % and 98.20 % for rTV, respectively.CONCLUSION: Relatively high carrying rates of HGV and/or TTV in the sera of non-hepatitis patients with oral diseasesin Hangzhou area are demonstrated. Parts of the carriersare HGV and/or TTV positive in their saliva. The results ofthis study indicate that dentists may be one of the populationswith high risk for HGV and/or TTV infection, and by way of saliva HGV and TTV may be transmitted among individuals.
文摘Objective To detect the virus in the feces and sera of patients in an outbreak of enterically transmitted non-A,non-E hepatitis,and this review covers the epidemiologic features and experimental infection of this novel virus.Data sources Data sources come from our own work on this subject,published and unpublished.Study selection Mainly our own work is included,and related literature is collected.Results In an outbreak of enterically transmitted non-A-E hepatitis among students,a total of 381 cases (60.7%)were documented.Viral fragments identical to transfusion transmitted virus(TTV)were detected in both serum and stool samples.Asymptomatic virus carriers among the staff had positive serum(32.1%)and feces(24.6%),clearly a potential source of infection.This viral infection prevalence in 2 remote villages in northern and southern China was 9.2% and 10.6%,respectively,suggesting that China is an endemic area.In this study,groups of 3 Rhesus monkeys were infected via oral or intravenous inoculation with patient feces.Two additional monkeys were infected by passage.The virus was detected in serum,peripheral blood mononuclear cell(PBMC),liver,spleen and small intestine,while the virus positive single strand,which might be a replicative intermediate,was only in liver,intestine and PBMC of all animals.Conclusions This nonenveloped DNA virus might be transmitted both by blood and enteric routes.Considering its wide distribution and high prevalence,we suppose that nonparenteral transmission is more important.
