Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 11
    ISSN: 1573-7284
    Keywords: Hepatitis B ; Epidemiology ; Geography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract In a sample of inhabitants of the Arsi region of Ethiopia prevalence of hepatitis B is around 80% in the age group 20–24. In addition to age, sex and size of family, exposure to tribal practices is a determinant of seropositivity in this group accounting for as much as 20'% of the total burden of the infection. Waiting for a mass vaccination campaign, presently unrealistic in this area of the world, health education, as part of a comprehensive primary health care program, has to be considered as a potentially effective preventive tool.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 12
    ISSN: 1432-8798
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary.  In woodchuck hepatocellular carcinoma (HCC) the myc-oncogene family (particularly N-myc2) and the win locus of cellular genome have been reported as frequent targets for integration of woodchuck hepatitis virus (WHV) DNA. In this paper a further cellular locus, b3n, is reported as recurrent target for WHV integration in woodchuck HCC. Cloning and sequencing of a WHV-DNA integration and its cellular flanking regions showed that viral DNA was inserted in a chromosomal region already described for WHV integration in another single HCC. The two integration sites are only 0.5 kb apart. A link between WHV integration in b3n and HCC development may be postulated. Careful analysis of the sequence of the unoccupied locus revealed that, in addition to Alu-like repeats and a gag-like coding region, already described, several features of Matrix Attachment Region (MAR) sequences are present. Thus (part of) b3n might be a previously unrecognized MAR. Organization of the chromatin in functional domains and regulation of gene expression are some functions attributed to MAR sequences. The occurrence of WHV-DNA integration close to the same putative MAR in two different HCCs suggests that a mechanism of deregulation of MAR functions by WHV insertion might act in some liver tumors.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 13
    ISSN: 1432-8798
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary.  In order to determine the prevalence of multiple infections with hepatitis viruses in chronic HBsAg carriers in Naples, to assess the interaction between HBV, HDV and HCV infections and to evaluate the influence of multiple virus hepatitis infections on the clinical presentation, we studied 198 HBsAg chronic carriers observed consecutively from 1971 to 1988 at our Liver Unit. Of the 198 HBsAg chronic carriers, 171 had undergone percutaneous liver biopsy. The presence of HBcAg or HDAg in the liver biopsy was considered a marker of HBV or HDV replication, respectively; the presence of anti-HCV was considered a marker of HCV infection. Anti-HCV was observed in 13.6% of the 22 subjects with normal liver, in 27.7% of the 47 patients with minimal chronic hepatitis, in 40% of the 50 with mild chronic hepatitis, in 70.6% of the 17 with moderate hepatitis, in 66.7% of the 3 with severe chronic hepatitis and in 65.6% of the 32 with active cirrhosis. Anti-HCV positive cases were antiHD positive more frequently than the anti-HCV negative (59.2% vs. 43%, p=0.05). HDV infection exerted a clear inhibition on the HBV genome. Among the 171 HBsAg chronic carriers, the finding of an active chronic hepatitis (moderate chronic hepatitis+severe chronic hepatitis+active cirrhosis) is less frequent in subjects with HBV replication alone than in those with HDV replication or HCV infection. Patients with both HBV replication and HCV infection and those with both HDV replication and HCV infection showed a very high prevelance of active chronic hepatitis.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 14
    ISSN: 1432-8798
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary.  The molecular evolution of HCV 2c in a case of vertical transmission was studied by comparing the virus quasispecies in the sera from the mother and from the child in a two-year follow-up. The positivity of HCV-RNA since the delivery accounted for an in-utero infection. The Core-E1 genome region (nt 928-1225) was amplified by polymerase chain reaction (PCR) from serum samples collected at delivery and at 3, 9, 18 and 24 months after birth. The RIBA pattern was characterised by isolated anti-c22 positivity in the serum from mother and in sera from the child during the first 9 months. Additional presence of anti-c33 was observed afterwards. Genetic relatedness among isolates and with a mother minor variant serum (Mo1.13) was found (mean variability ranged between 0.79% and 1.20%). From phylogenetic analysis this variant was identified as the origin of one of the two main lineages that included all isolates from child sera at 9, 18 and 24 months. The variability analysis has shown that high viral heterogeneity is present in the child serum collected at birth (3.16%). In this phase the dn/ds index (1.26%) indicates the presence of strong selective pressures. The development of child specific immune response at 9th month was concurrent with the disappearance of two mutants at positions 11 and 104 of E1.This rare case of inutero mother-to-infant transmission can be considered as a model to elucidate the HCV quasispecies diversification during the first stage of infection.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...