ABSTRACT
INTRODUCTION: Epstein-Barr virus (EBV) is associated with different types of human malignancies, including Burkitt lymphoma, nasopharyngeal carcinoma, and lymphomas. We retrospectively investigated the presence of EBV-DNA by real-time PCR in clinical samples of patients diagnosed as having hematologic malignancies while investigating the cause of lymphoproliferative disorders, and investigated its relationship to clinical manifestations. PATIENTS AND METHODS: Fifty clinical samples sent to Gazi University's hematology clinics between November 2013 and March 2018 were included. EBV-DNA was investigated by real-time PCR method, and EBV-IgM and EBV-IgG antibodies were investigated by ELISA. RESULTS: Fifty serum samples were investigated, and 10% (5/50) EBV-DNA positivity was determined in patients. Of the 5 patients with EBV-DNA positivity, 2 had acute lymphoblastic leukemia, 1 lymphoma, 1 T-cell lymphoma, and 1 B-cell lymphoma. Concomitant EBV-DNA and viral capsid antigen (VCA)-IgM positivity was not detected. The VCA-lgM test results of the all EBV-DNA-positive patients were negative and VCA-IgG positive (except for 1 patient). Regarding virus load, of the 5 samples, 2, 1, 1, and 1 of the samples had a virus load of 102, 103, 104, and 105 copies/mL, respectively. CONCLUSION: EBV infection is threatening in patients with hematologic malignancies and are diagnosed by serologic and molecular methods. As a result of the study, we suggest that the detection of EBV-DNA by real-time PCR in patients being admitted with lymphoproliferative diseases and diagnosed as acute lymphoblastic leukemia and lymphomas may be useful in follow-up and treatment.
Subject(s)
Epstein-Barr Virus Infections/complications , Lymphoproliferative Disorders/complications , Adult , Aged , Female , Humans , Male , Middle Aged , Retrospective Studies , Young AdultABSTRACT
BACKGROUND: Parvoviruses are small DNA viruses causing erythema infectiosum, which is known as the fifth disease. The aim of this study was to investigate the presence of Parvovirus B19 DNA by Real-Time-PCR retrospectively in clinical samples of children diagnosed as acute leukemia and aplastic anemia when investigating the cause of pancytopenia and to investigate its relationship with the clinical manifestations. METHODS: The study samples were collected between March 2014 and March 2018 in Gazi University, Faculty of Medicine, Department of Pediatric Hematology. Sixty pediatric patients; 37 males and 23 females, were included in the study. Nucleic acid isolation was performed by using MagNA-Pure Compact Nucleic Acid Isolation Kit (Roche, Germany). Extracted DNA was studied with LightCycler® 2.0 using the Real-Time PCR method and LightCycler® Parvovirus B19 Quantification Kit (Roche, Germany), and the results were evaluated quantitatively. Parvovirus B19 DNA detection interval of the kit was 101 - 106 copies/mL. RESULTS: Sixty serum samples were investigated and 8.3% (5/60) Parvovirus B19 DNA positivity was determined. Of the five patients with Parvovirus B19 DNA positivity, three had acute lymphoblastic leukemia and two were diagnosed as aplastic anemia. Regarding viral load; 2/5, 1/5, 1/5, and 1/5 of the samples had a viral load of 102, 103, 104, and 105 copies/mL, respectively. Parvovirus B19 DNA positivity was detected in samples from March (2/5), April (2/5), and August (1/5). CONCLUSIONS: Patients with acute leukemia and aplastic anemia in childhood using immunosuppressive drugs, blood, and blood products during chemotherapy, encounter Parvovirus B19 infections in the follow-up period and are diagnosed by serological and molecular methods. As a result of the study, we suggest that the detection of Parvovirus B19 DNA by Real-Time PCR method in children being admitted with pancytopenia and diagnosed as acute leukemia and aplastic anemia is useful in the follow-up and treatment.
Subject(s)
Anemia, Aplastic/diagnosis , Erythema Infectiosum/diagnosis , Pancytopenia/diagnosis , Parvovirus B19, Human/genetics , Precursor Cell Lymphoblastic Leukemia-Lymphoma/diagnosis , Adolescent , Anemia, Aplastic/complications , Anemia, Aplastic/drug therapy , Child , Child, Preschool , DNA, Viral/genetics , DNA, Viral/isolation & purification , Erythema Infectiosum/complications , Erythema Infectiosum/virology , Female , Humans , Immunosuppressive Agents/therapeutic use , Infant , Male , Pancytopenia/blood , Pancytopenia/complications , Parvovirus B19, Human/physiology , Precursor Cell Lymphoblastic Leukemia-Lymphoma/complications , Precursor Cell Lymphoblastic Leukemia-Lymphoma/drug therapy , Real-Time Polymerase Chain Reaction , Retrospective StudiesABSTRACT
Background/aim: To determine the frequency, genotype distribution, and genetic relatedness of adenoviruses in children under 5 years old with diarrhoea and to investigate their distribution according to clinical findings, age, months, and seasons. Materials and methods: Stool samples were collected from 180 children with acute gastroenteritis who presented from July 2007 through June 2011 at the Ankara Training and Education Hospital. Stool samples were analysed by immune chromatographic test (ICT), enzyme immunoassay (EIA), and polymerase chain reaction (PCR). All adenovirus types were determined by nucleotide sequence analysis. A phylogenetic tree was constructed by Mega 6.0 using the neighbour-joining method. Results: Five percent of the samples were positive for adenovirus (9/180) by ICT, 6.1% (11/180) by EIA, and 13.9% (25/180) by PCR. Adenovirus gastroenteritis did not show any differences in age group, sex, month, or season. In this study, 16 (64%) of the PCR positive samples were AdV41, 6 (24%) were AdV40, 2 (8%) were AdV31, and 1 (4%) was AdV7, as determined by nucleotide sequencing. Conclusion: AdV31 and AdV7 were associated with gastroenteritis. Adenovirus serotypes showed a similarity of 80% (20/25) and 20% (5/25) with Asian and American serotypes, respectively.
