-
Inci Celik,
Ersin Karatayli,
Emrah Cevik,
S Gökçe Kabakçi,
Senem Ceren Karatayli, Bedia Dinç,
Kubilay Cinar,
Kendal Yalçin,
Ramazan Idilman,
Cihan Yurdaydin,
A Mithat Bozdayi
[show abstract]
[hide abstract]
ABSTRACT: Hepatitis delta virus (HDV) is a subviral agent of hepatitis B virus (HBV), and its life cycle is dependent on HBV. It is commonly accepted that HDV has eight distinct genotypes. In this study, the complete nucleotide sequences of HDV genomes isolated from nine Turkish patients were obtained by RT-PCR using two pairs of primers that cover the entire HDV genome. PCR products were sequenced directly. The results showed that these 9 isolates were approximately 1680 base pairs in length and clustered in the genotype HDV-1 branch when phylogenetic analysis was done with the sequences together with the complete sequences of HDV genomes representing each genotype retrieved from GenBank. Analysis of a portion of the large hepatitis D antigen (L-HDAg) gene showed that sequence similarity among these Turkish isolates is between 87.4 and 97.1%, and the Turkish isolates have the most sequence similarity to HDV-1 (90.5%), while they have the least sequence similarity to HDV-3 (64.1%). Full-genome analysis indicates that the sequence similarity is between 80.7 and 95.4%, and the highest sequence similarity is 84.8% (between the Turkish isolates and HDV-1). The lowest sequence similarity is 56.4% (between the Turkish isolates and HDV-3). In conclusion, phylogenetic analysis shows that the Turkish HDV isolates belong to HDV-1.
Archives of Virology 12/2011; 156(12):2215-20. · 2.11 Impact Factor
-
[show abstract]
[hide abstract]
ABSTRACT: There is no specific antiviral therapy or a vaccine, which could be safely administered to the pregnant women with primary human cytomegalovirus (CMV) infection. Therefore, prenatal diagnosis has a critical role in the management of pregnancy, complicated by this disease. In this study, we investigated the prevalence and clinical consequences of human CMV infection from cervicovaginal smear and amniotic fluid samples of pregnant women by using real-time polymerase chain reaction (RT-PCR) assay, in one of the Obstetrics and Gynecology outpatient clinics of Turkey. The identification of reliable prognostic markers of fetal disease remains the main purpose and a major challenge on this issue.
Two hundred and six samples, of which 135 were cervicovaginal smear and 71 were amniotic fluid, were enrolled in the study. The DNAs of the samples were extracted by using Roche Diagnostic (Roche, Germany) kit and amplifications of these DNAs were studied by using Light-Cycler system (Roche Germany) as being quantitative. Anti-CMV IgM antibodies in the samples were studied by both MEIA (Imx system, Abbot Laboratories, USA) and a commercial ELISA kit (Radim SPA, Italy) while anti-CMV IgG antibodies were studied by MEIA (Axsym system, Abbot Laboratories, USA).
Human CMV DNA was found to be positive in 1.5% (2 in 135) of cervicovaginal smear and 1.4% (1 in 71) of amniotic fluid samples by RT-PCR. IgM and IgG were found to be negative in all of the cervicovaginal smear samples by both MEIA and ELISA, while IgG antibody was found to be positive in only one of the amniotic fluid samples by MEIA.
With RT-PCR assay, we have found the prevalence of human CMV in pregnant women similar to epidemiologic reports, which have been described earlier. Whereas the fetus with positive amniotic fluid in favor of human CMV had an intrauterine growth restriction resulted in intrauterine exitus, no symptoms were observed in the infants of the other two pregnant women with positive RT-PCR results. The fact that the clinical consequence of the newborn whose amniotic fluid evaluation revealed human CMV infection by RT-PCR made us think that this molecular diagnosis method may be a reliable assay in prenatal diagnosis of this pathogen.
Archives of Gynecology and Obstetrics 03/2006; 273(5):261-6. · 1.28 Impact Factor
-
[show abstract]
[hide abstract]
ABSTRACT: The aim of this study was to investigate the presence of Herpes simplex virus (HSV) type 1 and type 2 DNA from the clinical samples sent to our routine laboratory, by real-time polymerase chain reaction (PCR). A total of 328 samples collected from 306 female and 7 male patients who were admitted to different outpatient clinics were included in the study. The samples included 235 cervical swab samples (of which 150 were from pregnant women), 77 amniotic fluid, 8 blood, 6 cerebrospinal fluid (CSF), one pericardial fluid and one cervical biopsy. DNA extraction were performed with High Pure Viral Nucleic Acid Kit (Roche, Germany) and amplified in Light Cycler (Roche, Germany) with a commercial amplification mix (Metis Biotechnology, Ankara). HSV-DNA positivity were found in 2.1% of the cervical samples (three of 150 pregnant and two of 85 non-pregnant women), two of the blood samples and one of the CSF sample, while there were no positive result for the other clinical specimens. It can be concluded that, real-time PCR would be preferred in conditions requiring rapid diagnosis such as HSV infections of central nervous system and HSV suspected infections of immunosupressed patients, as a rapid and practical method.
Mikrobiyoloji bülteni 08/2004; 38(3):233-8. · 0.40 Impact Factor
