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Vuković V, Patić A, Ristić M, Kovačević G, Hrnjaković Cvjetković I, Petrović V. Seroepidemiology of Human Parvovirus B19 Infection among the Population of Vojvodina, Serbia, over a 16-Year Period (2008-2023). Viruses 2024; 16:180. [PMID: 38399956 PMCID: PMC10893261 DOI: 10.3390/v16020180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2024] [Revised: 01/19/2024] [Accepted: 01/22/2024] [Indexed: 02/25/2024] Open
Abstract
This study aimed to estimate the serological status and dynamic changes in the prevalence of Parvovirus B19 (PVB19) antibodies within the general population residing in the northern part of the Republic of Serbia (Province of Vojvodina) during a 16-year period. Serum samples were analyzed for Human PVB19-specific IgM and IgG antibodies using enzyme-linked immunosorbent assay (ELISA). Throughout the study period, the overall seroprevalence was 49.51%. Approximately 10% of patients exhibited a serologic profile positive for PVB19 IgM antibodies. Notably, seroprevalence varied significantly, ranging from 9.12% in the pediatric cohort (ages 1-4 years) to 65.50% in the adult demographic (40-59 years old). Seroprevalence was higher (51.88%) among women compared to men (42.50%). Immunologically naive pregnant women in the age groups 26-36 and 36-45 years had 45% (OR = 0.55, 95% CI: 0.31-1.00) and 52% (OR = 0.48; 95% CI: 0.24-0.94) lower odds of having negative IgM and IgG compared to those in age group 16-25 years old. Improved knowledge of the epidemiology of PVB19 may assist clinicians in the differential diagnosis of PVB19 clinical manifestations. The PVB19 detection is particularly important for monitoring individuals in risk groups such as women of reproductive age, medical staff, patients with hematological disorders, and those with immunodeficiency.
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Affiliation(s)
- Vladimir Vuković
- Institute of Public Health of Vojvodina, 21000 Novi Sad, Serbia; (A.P.); (M.R.); (G.K.); (I.H.C.); (V.P.)
- Department of Epidemiology, Faculty of Medicine, University of Novi Sad, 21000 Novi Sad, Serbia
| | - Aleksandra Patić
- Institute of Public Health of Vojvodina, 21000 Novi Sad, Serbia; (A.P.); (M.R.); (G.K.); (I.H.C.); (V.P.)
- Department of Microbiology with Parasitology and Immunology, Faculty of Medicine, University of Novi Sad, 21000 Novi Sad, Serbia
| | - Mioljub Ristić
- Institute of Public Health of Vojvodina, 21000 Novi Sad, Serbia; (A.P.); (M.R.); (G.K.); (I.H.C.); (V.P.)
- Department of Epidemiology, Faculty of Medicine, University of Novi Sad, 21000 Novi Sad, Serbia
| | - Gordana Kovačević
- Institute of Public Health of Vojvodina, 21000 Novi Sad, Serbia; (A.P.); (M.R.); (G.K.); (I.H.C.); (V.P.)
| | - Ivana Hrnjaković Cvjetković
- Institute of Public Health of Vojvodina, 21000 Novi Sad, Serbia; (A.P.); (M.R.); (G.K.); (I.H.C.); (V.P.)
- Department of Microbiology with Parasitology and Immunology, Faculty of Medicine, University of Novi Sad, 21000 Novi Sad, Serbia
| | - Vladimir Petrović
- Institute of Public Health of Vojvodina, 21000 Novi Sad, Serbia; (A.P.); (M.R.); (G.K.); (I.H.C.); (V.P.)
- Department of Epidemiology, Faculty of Medicine, University of Novi Sad, 21000 Novi Sad, Serbia
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Sammut R, Feghoul L, Xhaard A, Dhedin N, Robin M, Michonneau D, Loschi M, Legoff J, de Peffault de Latour R, de Sicre de Fontbrune F. Clinical and immune features of human parvovirus B19 infection in allogeneic stem cell transplantation recipients: A retrospective monocentric study. Transpl Infect Dis 2023; 25:e14118. [PMID: 37594199 DOI: 10.1111/tid.14118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 07/08/2023] [Accepted: 08/01/2023] [Indexed: 08/19/2023]
Abstract
BACKGROUND Human parvovirus B19 (B19V) infection is associated with pure red cell aplasia (PRCA) in immunocompromised patients; however, the spectrum of manifestations associated with B19V in allogeneic hematopoietic stem cell transplantation recipients (alloHSCT) has rarely been reported. METHODS In this study, we aimed to report clinical and immune features of B19V infection after alloHSCT. We retrospectively collected and analyzed clinical and microbiological data of all transplanted patients with B19V DNAmia or tissue infection detected by polymerase chain reaction (PCR) in our center from 2010 to 2021. RESULTS We report 35 cases of B19V infections in 33 patients. Median time from transplant to B19V first PCR positivity was 6.9 months (interquartile range (IQR) [1.6-18.9]). No preferential immune profile, type of transplantation or conditioning was identified. Hematological impairment was the most frequent sign, followed by rash and fever. Unconventional clinical forms were also detected, such as acute myelitis and myositis. For some cases, the direct relationship between symptoms and B19V infection was difficult to prove but was suggested by targeted tissue PCR positivity. When hematological impairment was not at the forefront, reticulocytopenia helped to diagnose B19V infections. Treatment was mainly based on high dose intravenous immunoglobulin. CONCLUSION Although hematological impairment was the most frequent sign, B19V can affect multiple targets and lead to atypical manifestations. Because of its heterogeneous clinical presentation, B19V infection is likely under-diagnosed. Diagnosis of unusual B19V organ involvement needs combination of arguments which can include targeted tissue PCR.
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Affiliation(s)
- Rinzine Sammut
- Service d'Hématologie Clinique, Centre Hospitalier Universitaire de Nice, Nice, France
| | - Linda Feghoul
- Université de Paris, Inserm U976, Insight team, F-75010, Paris France Unité Virologie et greffes, Département des agents infectieux, Hôpital Saint-Louis, APHP, Paris, France
| | - Alienor Xhaard
- Service d'hématologie-greffe, Hôpital Saint-Louis, Université Paris Cité, Paris, France
| | - Nathalie Dhedin
- Service d'hématologie Adolescents et Jeunes Adultes, Hôpital Saint Louis, AP-HP, Paris, France
| | - Marie Robin
- Service d'hématologie-greffe, Hôpital Saint-Louis, Université Paris Cité, Paris, France
| | - David Michonneau
- Service d'hématologie-greffe, Hôpital Saint-Louis, Université Paris Cité, Paris, France
- Université de Paris Cité, Paris, France
| | - Michael Loschi
- Service d'Hématologie Clinique, Centre Hospitalier Universitaire de Nice, Nice, France
- INSERM U1065, Centre de Médecine Moléculaire Méditerranéen, Université Nice Cote d'Azur, Nice, France
| | - Jerome Legoff
- Université de Paris, Inserm U976, Insight team, F-75010, Paris France Unité Virologie et greffes, Département des agents infectieux, Hôpital Saint-Louis, APHP, Paris, France
| | - Regis de Peffault de Latour
- Service d'hématologie-greffe, Hôpital Saint-Louis, Université Paris Cité, Paris, France
- Université de Paris Cité, Paris, France
- Centre Français de Référence de l'Aplasie Médullaire et de l'Hémoglobinurie Paroxystique Nocturne, Paris, France
| | - Flore de Sicre de Fontbrune
- Service d'hématologie-greffe, Hôpital Saint-Louis, Université Paris Cité, Paris, France
- Centre Français de Référence de l'Aplasie Médullaire et de l'Hémoglobinurie Paroxystique Nocturne, Paris, France
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Almada DL, Alves ADR, Leon LAA, Macedo DFR, de Oliveira SA, Siqueira MM, Brown D, Cubel Garcia RDCN. Use of oral fluid samples for the investigation of outbreaks of human parvovirus B19 infection. Braz J Microbiol 2022; 53:1959-1967. [PMID: 36149627 PMCID: PMC9679058 DOI: 10.1007/s42770-022-00828-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Accepted: 09/08/2022] [Indexed: 01/13/2023] Open
Abstract
The use of oral fluid (OF) samples for serological diagnosis of parvovirus B19 infection during outbreaks of erythema infectiosum had already been demonstrated, but the feasibility of using OF for the characterization of B19 genotypes circulating during outbreaks has not been described. The aim of this study was to assess the use of "in-house" PCR-based assays as a powerful tool for a rapid diagnosis and molecular characterization of B19 strains in OF samples during outbreaks. Paired serum and OF samples collected from anti-B19 IgM-positive patients, during two outbreaks of ertythema infectiosum (1999-2000 and 2004-2005), were tested by conventional (cPCR) and quantitative PCR (qPCR). qPCR was more sensitive than cPCR for detecting B19-DNA in both OF and serum. Overall, OF presented lower viral load (9.97 × 106 UI/mL) than serum (2.42 × 1010 UI/mL) and this difference was statistically significant. All OF samples obtained from patients in the age group < 14 years presented low viral load (< 104 IU/mL). No correlation was found between viral load and the number of days of onset of rash. Sequence analysis from PCR positive OF samples confirmed the circulation of subgenotype 1a (G1a) during these outbreaks. Our findings indicate that PCR-based assays may fail to detect B19-DNA in approximately 50% of OF compared to serum samples. Nevertheless, our study has shown for the first time that the genome sequence of the amplicon from non-invasive clinical sample is useful for molecular genotyping and may be a tool to clarify the genetic diversity of B19 strains circulating in distinct outbreaks.
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Affiliation(s)
- Daiana Lima Almada
- Departamento de Microbiologia e Parasitologia, Instituto Biomédico, Universidade Federal Fluminense, Niterói, RJ, Brazil
| | - Arthur Daniel Rocha Alves
- Laboratório de Desenvolvimento Tecnológico em Virologia, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brazil
| | - Luciane Almeida Amado Leon
- Laboratório de Desenvolvimento Tecnológico em Virologia, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brazil
| | | | - Solange Artimos de Oliveira
- Serviço de Infectologia do Hospital Universitário Antônio Pedro, Universidade Federal Fluminense, Niterói, RJ, Brazil
| | - Marilda Mendonça Siqueira
- Laboratório de Vírus Respiratórios e do Sarampo, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brazil
| | - David Brown
- Laboratório de Vírus Respiratórios e do Sarampo, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brazil
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Xu M, Leskinen K, Gritti T, Groma V, Arola J, Lepistö A, Sipponen T, Saavalainen P, Söderlund-Venermo M. Prevalence, Cell Tropism, and Clinical Impact of Human Parvovirus Persistence in Adenomatous, Cancerous, Inflamed, and Healthy Intestinal Mucosa. Front Microbiol 2022; 13:914181. [PMID: 35685923 PMCID: PMC9171052 DOI: 10.3389/fmicb.2022.914181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Accepted: 04/25/2022] [Indexed: 11/18/2022] Open
Abstract
Parvoviruses are single-stranded DNA viruses, infecting many animals from insects to humans. Human parvovirus B19 (B19V) causes erythema infectiosum, arthropathy, anemia, and fetal death, and human bocavirus (HBoV) 1 causes respiratory tract infections, while HBoV2-4 are enteric. Parvoviral genomes can persist in diverse non-permissive tissues after acute infection, but the host-cell tropism and the impact of their tissue persistence are poorly studied. We searched for parvoviral DNA in a total of 427 intestinal biopsy specimens, as paired disease-affected and healthy mucosa, obtained from 130 patients with malignancy, ulcerative colitis (UC), or adenomas, and in similar intestinal segments from 55 healthy subjects. Only three (1.6%) individuals exhibited intestinal HBoV DNA (one each of HBoV1, 2, and 3). Conversely, B19V DNA persisted frequently in the intestine, with 50, 47, 31, and 27% detection rates in the patients with malignancy, UC, or adenomas, and in the healthy subjects, respectively. Intra-individually, B19V DNA persisted significantly more often in the healthy intestinal segments than in the inflamed colons of UC patients. The highest loads of B19V DNA were seen in the ileum and colon specimens of two healthy individuals. With dual-RNAscope in situ hybridization and immunohistochemistry assays, we located the B19V persistence sites of these intestines in mucosal B cells of lymphoid follicles and vascular endothelial cells. Viral messenger RNA transcription remained, however, undetected. RNA sequencing (RNA-seq) identified 272 differentially expressed cellular genes between B19V DNA-positive and -negative healthy ileum biopsy specimens. Pathway enrichment analysis revealed that B19V persistence activated the intestinal cell viability and inhibited apoptosis. Lifelong B19V DNA persistence thus modulates host gene expression, which may lead to clinical outcomes.
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Affiliation(s)
- Man Xu
- Department of Virology, University of Helsinki, Helsinki, Finland
| | - Katarzyna Leskinen
- Research Programs Unit, Department of Immunobiology, University of Helsinki, Helsinki, Finland
| | - Tommaso Gritti
- Department of Virology, University of Helsinki, Helsinki, Finland
| | - Valerija Groma
- Joint Laboratory of Electron Microscopy, Riga Stradin,s University, Riga, Latvia
| | - Johanna Arola
- Department of Pathology, University of Helsinki, Helsinki, Finland
- HUS Diagnostic Centre, Helsinki University Hospital, Helsinki, Finland
| | - Anna Lepistö
- Department of Colorectal Surgery, Helsinki University Hospital, Helsinki, Finland
- Applied Tumor Genomics, Research Programs Unit, University of Helsinki, Helsinki, Finland
| | - Taina Sipponen
- HUCH Abdominal Center, Helsinki University Hospital, Helsinki, Finland
| | - Päivi Saavalainen
- Research Programs Unit, Department of Immunobiology, University of Helsinki, Helsinki, Finland
- Folkhälsan Research Center, Helsinki, Finland
| | - Maria Söderlund-Venermo
- Department of Virology, University of Helsinki, Helsinki, Finland
- *Correspondence: Maria Söderlund-Venermo,
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Evaluation of Molecular Test for the Discrimination of "Naked" DNA from Infectious Parvovirus B19 Particles in Serum and Bone Marrow Samples. Viruses 2022; 14:v14040843. [PMID: 35458573 PMCID: PMC9027101 DOI: 10.3390/v14040843] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 03/29/2022] [Accepted: 04/05/2022] [Indexed: 02/06/2023] Open
Abstract
Low levels of parvovirus B19 (B19V) DNA can be detected in the circulation and in different tissue of immunocompetent individuals for months or years, which has been linked to inflammatory diseases such as cardiomyopathy, rheumatoid arthritis, hepatitis, and vasculitis. However, the detection of B19V DNA does not necessarily imply that infectious virions are present. This study aimed to evaluate the method based on the Benzonase® treatment for differentiation between the infectious virions from “naked” DNA in serum and bone marrow (BM) samples to be useful for the B19V routine diagnosis. In addition, we estimated the period of viremia and DNAemia in the sera and bone marrow of nonhuman primates experimentally infected with B19V. Serum samples from ten patients and from four cynomolgus monkeys experimentally infected with B19V followed up for 60 days were used. Most of the human serum samples became negative after pretreatment; however, only decreased viral DNA loads were observed in four patients, indicating that these samples still contained the infectious virus. Reduced B19V DNA levels were observed in animals since 7th dpi. At approximately 45th dpi, B19V DNA levels were below 105 IU/mL after Benzonase® pretreatment, which was not a consequence of active B19V replication. The test based on Benzonase® pretreatment enabled the discrimination of “naked DNA” from B19V DNA encapsidated in virions. Therefore, this test can be used to clarify the role of B19V as an etiological agent associated with atypical clinical manifestations.
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Khamitova IV, Lavrentieva IN, Semenov AV. Algorithm for laboratory diagnostics of parvoviral infection in risk groups. Klin Lab Diagn 2022; 67:115-122. [PMID: 35192759 DOI: 10.51620/0869-2084-2022-67-2-115-122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Parvovirus infection (PVI) is widespread, characterized by airborne, bloodborne and vertical transmission routes. Parvovirus B19 (PVB19) exhibits tropism to erythropoietic cells. According to the increased likelihood principle of PVB19 infection and the severity of the consequences, immunocompromised individuals, especially those with hematological manifestations of diseases, are in increased risk group. Based on the own research results and analysis of the published data, we have proposed specific algorithms for PVI laboratory testing in individual risk groups, taking into account the peculiarities of the development and infection manifestation in each group: in HIV-infected patients, in oncohematological patients with to whom allogeneic hematopoietic stem cell transplantation (allo-HSCT) have been prescribed (blood and bone marrow recipients), as well as in patients with chronic anemia of parasitic etiology. For each group, the main clinical or laboratory marker, treatment procedure, or patient physiological parameters have been determined, based on which it was recommended to test for PVI. For HIV-infected patients, the main criterion for PVI testing is persistent anemia. For oncohematological patients, the basis for PVI testing is allo-HSCT procedure, which is planned or performed for this particular patient. For malaria patients, the patient's age was considered as major criterion, since in malaria and PVI coinfected young children can lead to a fatal outcome. The proposed PVI diagnostics algorithms usein risk groups can help to predict the severe course of underlying disease associated with PVB19 infection, and timely correct the therapy used.
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Affiliation(s)
| | | | - A V Semenov
- Ekaterinburg Research Institute of Viral Infections
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Nurmi V, Hedman L, Perdomo MF, Weseslindtner L, Hedman K. Comparison of approaches for IgG avidity calculation and a new highly sensitive and specific method with broad dynamic range. Int J Infect Dis 2021; 110:479-487. [PMID: 34044143 DOI: 10.1016/j.ijid.2021.05.047] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 05/19/2021] [Accepted: 05/21/2021] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND Antimicrobial IgG avidity is measured in the diagnosis of infectious disease, for dating of primary infection or immunization. It is generally determined by either of two approaches, termed here the avidity index (AI) or end-point ratio (EPR), which differ in complexity and workload. While several variants of these approaches have been introduced, little comparative information exists on their clinical utility. METHODS This study was performed to systematically compare the performances of these approaches and to design a new sensitive and specific calculation method, for easy implementation in the laboratory. The avidities obtained by AI, EPR, and the newly developed approach were compared, across parvovirus B19, cytomegalovirus, Toxoplasma gondii, rubella virus, and Epstein-Barr virus panels comprising 460 sera from individuals with a recent primary infection or long-term immunity. RESULTS With optimal IgG concentrations, all approaches performed equally, appropriately discriminating primary infections from past immunity (area under the receiver operating characteristic curve (AUC) 0.93-0.94). However, at lower IgG concentrations, the avidity status (low, borderline, high) changed in 17% of samples using AI (AUC 0.88), as opposed to 4% using EPR (AUC 0.91) and 6% using the new method (AUC 0.93). CONCLUSIONS The new method measures IgG avidity accurately, in a broad range of IgG levels, while the popular AI approach calls for a sufficiently high antibody concentration.
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Affiliation(s)
- Visa Nurmi
- Department of Virology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland.
| | - Lea Hedman
- Department of Virology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Maria F Perdomo
- Department of Virology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | | | - Klaus Hedman
- Department of Virology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
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Abdelrahman D, Al-Sadeq DW, Smatti MK, Taleb SA, AbuOdeh RO, Al-Absi ES, Al-Thani AA, Coyle PV, Al-Dewik N, Qahtani AAA, Yassine HM, Nasrallah GK. Prevalence and Phylogenetic Analysis of Parvovirus (B19V) among Blood Donors with Different Nationalities Residing in Qatar. Viruses 2021; 13:v13040540. [PMID: 33805034 PMCID: PMC8063948 DOI: 10.3390/v13040540] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Revised: 03/12/2021] [Accepted: 03/14/2021] [Indexed: 12/16/2022] Open
Abstract
Human parvovirus (B19V) is the causative agent of erythema infectiosum in children and is linked to a wide range of clinical manifestations. Studies related to B19V prevalence in the Middle East and North Africa (MENA) region and other parts of Asia are very scarce. The objectives of this study were to estimate the seroprevalence (anti-B19V IgM and IgG), the viremia rate (B19V DNA), and the circulating genotypes of B19V among blood donors in Qatar. Methods: Donors’ blood samples (n = 5026) from different nationalities, mainly from the MENA region and South East Asia, were collected from 2014–2016. Samples were tested for the B19V DNA using RT-PCR. Furthermore, 1000 selected samples were tested to determine the seroprevalence of B19V antibodies using enzyme-linked immunosorbent assay (ELISA). Genotyping was performed on 65 DNA positive samples by sequencing of nested PCR fragments (NS1-VP1u region, 927 nt). Results: Only 1.4% (70/5026) of the samples had detectible B19V DNA in their blood. B19V DNA prevalence statistically decreased with age (p = 0.03). Anti-B19V IgG was detected in 60.3% (561/930) of the tested samples, while only 2.1% (20/930) were IgM-positive and 1.2% (11/930) were both IgM- and IgG-positive. B19V genotyping showed a predominance of Genotype 1 (100%). Sequence analysis of the NS1-VP1u region revealed 139 mutation sites, some of which were amino acid substitutions. Conclusion: Our results indicated a relatively high seroprevalence of B19V in Qatar. Most importantly, B19 DNA was detected among Qatari and non-Qatari blood donors. Therefore, blood banks in Qatar might need to consider screening for B19V, especially when transfusion is intended for high-risk populations, including immunocompromised patients.
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Affiliation(s)
| | - Duaa W. Al-Sadeq
- Biomedical Research Center, Member of QU Health, Qatar University, Doha, Qatar; (D.W.A.-S.); (M.K.S.); (E.S.A.-A.); (A.A.A.-T.); (H.M.Y.)
- College of Medicine, Member of QU Health, Qatar University, Doha, Qatar
| | - Maria K. Smatti
- Biomedical Research Center, Member of QU Health, Qatar University, Doha, Qatar; (D.W.A.-S.); (M.K.S.); (E.S.A.-A.); (A.A.A.-T.); (H.M.Y.)
- College of Health and Life Sciences, Hamad Bin Khalifa University, Doha, Qatar;
| | - Sara A. Taleb
- College of Health and Life Sciences, Hamad Bin Khalifa University, Doha, Qatar;
| | - Raed O AbuOdeh
- Medical Laboratory Sciences Department, College of Health Sciences, University of Sharjah, Sharjah, United Arab Emirates;
| | - Enas S. Al-Absi
- Biomedical Research Center, Member of QU Health, Qatar University, Doha, Qatar; (D.W.A.-S.); (M.K.S.); (E.S.A.-A.); (A.A.A.-T.); (H.M.Y.)
| | - Asmaa A. Al-Thani
- Biomedical Research Center, Member of QU Health, Qatar University, Doha, Qatar; (D.W.A.-S.); (M.K.S.); (E.S.A.-A.); (A.A.A.-T.); (H.M.Y.)
- Department of Biomedical Science, College of Health Sciences, Member of QU Health, Qatar University, Doha, Qatar
| | - Peter. V. Coyle
- Division of Virology, Department of Pathology and Laboratory Medicine, Hamad Medical Corporation, Doha, Qatar;
| | - Nader Al-Dewik
- Department of Pediatrics, Clinical and Metabolic Genetics, Hamad Medical Corporation, Doha, Qatar;
| | - Ahmed A. Al Qahtani
- Department of Infection and Immunity, Research Center, King Faisal Specialist Hospital and Research Center, Riyadh 11564, Saudi Arabia;
- Department of Microbiology and Immunology, Alfaisal University School of Medicine, Riyadh 11533, Saudi Arabia
| | - Hadi M. Yassine
- Biomedical Research Center, Member of QU Health, Qatar University, Doha, Qatar; (D.W.A.-S.); (M.K.S.); (E.S.A.-A.); (A.A.A.-T.); (H.M.Y.)
- Department of Biomedical Science, College of Health Sciences, Member of QU Health, Qatar University, Doha, Qatar
| | - Gheyath K. Nasrallah
- Biomedical Research Center, Member of QU Health, Qatar University, Doha, Qatar; (D.W.A.-S.); (M.K.S.); (E.S.A.-A.); (A.A.A.-T.); (H.M.Y.)
- Department of Biomedical Science, College of Health Sciences, Member of QU Health, Qatar University, Doha, Qatar
- Correspondence:
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Safiyanu MB, Akande AO, Babayo A, Umar J, Abdullahi IN. Serological detection of human parvovirus B19 infection and associated risk factors among pregnant women in Jigawa State, Nigeria. J Immunoassay Immunochem 2021; 42:380-392. [PMID: 33591885 DOI: 10.1080/15321819.2021.1880435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Human Parvovirus B19 (B19 V) infection is hyperendemic in Nigeria. Pregnant women are not classically immunocompromised but maybe physiologically immunosuppressed and susceptible to viral infection. However, there is a paucity of studies on the epidemiology of B19V in Jigawa State, Northwestern Nigeria. This study aims to determine the seroprevalence, sociodemographic, and risk factors of human B19V infection among present women attending antenatal clinics of Jahun General Hospital, Nigeria. Between 2 February and 30 June 2019, blood samples were collected from 200 consented pregnant women and analyzed for anti-B19V IgM and IgG using commercially available enzyme-linked immunosorbent assay (ELISA). Sociodemographic and risk factors of subjects were collated through pre-tested structured questionnaires. Data generated were statistically analyzed for the association of anti-B19V and subjects' variables studied. Overall, the seroprevalence of anti-B19V IgM and IgG among pregnant women attending antenatal clinics of Jahun General Hospital, Nigeria was 6.0% and 22.5%, respectively. There was no significant association between the seroprevalence of anti-B19V IgM and anti-B19V IgG with all the sociodemographic variables and risk factors of pregnant women (P ˃0.05). However, pregnant women with a history of blood transfusion had a significant risk associated with seroprevalence of B19V IgM (OR = 5.95; 95% CI: 1.96-22.76; P = .009). Findings from this study revealed that a high proportion of the pregnant women were susceptible to B19V infection and anti-B19V IgG immunity decreased with age. Given the incidence of acute B19V infection, it is clinically important to continuously monitor their erythrocytes indices and screen their neonates for B19V infection and fetal complications.
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Affiliation(s)
- Mansur Bala Safiyanu
- Department of Medical Microbiology and Parasitology, Faculty of Clinical Sciences, Bayero University, Kano, Nigeria
| | - Azeez Oyebanji Akande
- Department of Medical Microbiology and Parasitology, Faculty of Clinical Sciences, Bayero University, Kano, Nigeria
| | - Adamu Babayo
- Department of Medical Microbiology and Parasitology, Faculty of Clinical Sciences, Bayero University, Kano, Nigeria
| | - Jamila Umar
- Department of Medical Microbiology and Parasitology, Faculty of Clinical Sciences, Bayero University, Kano, Nigeria
| | - Idris Nasir Abdullahi
- Department of Medical Microbiology and Parasitology, Faculty of Clinical Sciences, Bayero University, Kano, Nigeria.,Department of Medical Laboratory Science, College of Medical Sciences, Ahmadu Bello University, Zaria, Nigeria
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Herr W, Krumkamp R, Hogan B, Dekker D, Gyau K, Owusu-Dabo E, Sarpong N, Jaeger A, Loag W, Winter D, Akenten CW, Eibach D, Fickenscher H, Eis-Hübinger A, May J, Kreuels B. A cross-sectional study on risk factors for infection with Parvovirus B19 and the association with anaemia in a febrile paediatric population in Ghana. Sci Rep 2020; 10:15695. [PMID: 32973247 PMCID: PMC7515863 DOI: 10.1038/s41598-020-72657-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Accepted: 09/02/2020] [Indexed: 11/09/2022] Open
Abstract
Parvovirus B19 (B19V) occurs globally and can cause severe anaemia. The role of co-infections with Plasmodium falciparum (P. falciparum) has been controversially discussed. The study aimed to determine prevalence and severity of B19V infection, and the effect of co-infections on the risk for anaemia. Between November 2013 and April 2015 a total of 1186 hospital visits of children with fever admitted to a hospital in Ghana were recorded. Malaria, B19V and additional diagnostics for fever causes were performed. Recent B19V infection was defined as PCR and/or IgM positivity. Risk factors for a B19V infection and for anaemia were analysed. The prevalence of anaemia was compared between children with/without B19V infection, stratified for the presence of malaria. B19V IgM/PCR was positive in 6.4% (n = 76; 40 IgM + , 30 PCR + , 6 IgM + and PCR +). Among the B19V cases 60.5% had a simultaneous P. falciparum infection. B19V IgM positivity but not PCR positivity was associated with moderate-severe anaemia (OR = 2.6; 95%-CI: 1.3-5.3; P < 0.01 vs. OR = 0.9; 95%-CI: 0.4-1.8; P = 0.70). P. falciparum and IgM positive B19V infection were independent risk factors for anaemia with no evidence of effect modification. Our data show a significant association between B19V infection, defined as IgM but not PCR positivity, and moderate-severe anaemia. A multiplicative effect of B19V and P. falciparum infection was not found.
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Affiliation(s)
- Wiebke Herr
- Department of Infectious Disease Epidemiology, Bernhard Nocht Institute for Tropical Medicine, 20359, Hamburg, Germany.,Institute for Infection Medicine, Christian-Albrecht University of Kiel, University Medical Center Schleswig-Holstein, 24105, Kiel, Germany.,DZIF-German Center for Infection Research, Partnersite Hamburg-Lübeck-Borstel, 38124, Braunschweig, Germany
| | - Ralf Krumkamp
- Department of Infectious Disease Epidemiology, Bernhard Nocht Institute for Tropical Medicine, 20359, Hamburg, Germany.,DZIF-German Center for Infection Research, Partnersite Hamburg-Lübeck-Borstel, 38124, Braunschweig, Germany
| | - Benedikt Hogan
- Department of Infectious Disease Epidemiology, Bernhard Nocht Institute for Tropical Medicine, 20359, Hamburg, Germany
| | - Denise Dekker
- Department of Infectious Disease Epidemiology, Bernhard Nocht Institute for Tropical Medicine, 20359, Hamburg, Germany
| | - Kennedy Gyau
- Kumasi Centre for Collaborative Research in Tropical Medicine, College of Health Sciences, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Ellis Owusu-Dabo
- Kumasi Centre for Collaborative Research in Tropical Medicine, College of Health Sciences, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Nimako Sarpong
- Kumasi Centre for Collaborative Research in Tropical Medicine, College of Health Sciences, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Anna Jaeger
- Department of Infectious Disease Epidemiology, Bernhard Nocht Institute for Tropical Medicine, 20359, Hamburg, Germany
| | - Wibke Loag
- Department of Infectious Disease Epidemiology, Bernhard Nocht Institute for Tropical Medicine, 20359, Hamburg, Germany
| | - Doris Winter
- Department of Infectious Disease Epidemiology, Bernhard Nocht Institute for Tropical Medicine, 20359, Hamburg, Germany
| | - Charity Wiafe Akenten
- Kumasi Centre for Collaborative Research in Tropical Medicine, College of Health Sciences, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Daniel Eibach
- Department of Infectious Disease Epidemiology, Bernhard Nocht Institute for Tropical Medicine, 20359, Hamburg, Germany
| | - Helmut Fickenscher
- Institute for Infection Medicine, Christian-Albrecht University of Kiel, University Medical Center Schleswig-Holstein, 24105, Kiel, Germany
| | - Anna Eis-Hübinger
- University of Bonn Medical Center, Institute of Virology, 53127, Bonn, Germany
| | - Jürgen May
- Department of Infectious Disease Epidemiology, Bernhard Nocht Institute for Tropical Medicine, 20359, Hamburg, Germany.,DZIF-German Center for Infection Research, Partnersite Hamburg-Lübeck-Borstel, 38124, Braunschweig, Germany
| | - Benno Kreuels
- Department of Infectious Disease Epidemiology, Bernhard Nocht Institute for Tropical Medicine, 20359, Hamburg, Germany. .,Department of Tropical Medicine, Bernhard Nocht Institute for Tropical Medicine and I. Department of Medicine, University Medical Center Hamburg-Eppendorf, Martinistr. 52, 20246, Hamburg, Germany. .,DZIF-German Center for Infection Research, Partnersite Hamburg-Lübeck-Borstel, 38124, Braunschweig, Germany.
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11
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Cilla N, Domitien L, Arrada N, Chiffre D, Mahe P, Vincent L, Aguilar-Martinez P, Foulongne V. Transient aplastic crisis triggered by parvovirus B19 in a family with hereditary spherocytosis. IDCases 2020; 21:e00802. [PMID: 32461906 PMCID: PMC7242858 DOI: 10.1016/j.idcr.2020.e00802] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 05/05/2020] [Accepted: 05/05/2020] [Indexed: 12/14/2022] Open
Abstract
Acute parvovirus B19 infection may lead to erythroblastopenia crisis in patients with underlying red blood cells disorders. We report herein an uncommon concomitant transient aplastic crisis in a mother and her daughter, both affected by hereditary spherocytosis. The diagnosis was confirmed by the detection of a very high parvovirus B19 DNA load in both the mother’s and daughter’s sera, associated with the presence of parvovirus B19 specific immunoglobulin-M antibodies. This rapid etiologic diagnosis allowed to save bone marrow sampling, although blood transfusion was required regarding the severe anemia associated with pancytopenia. Our observation illustrates first line parvovirus B19 hypothesis in the context of transient aplastic crisis and that contagiousness in household contacts should be considered in family with a medical history of red blood cell pathology.
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Affiliation(s)
- Nicolas Cilla
- Department of Clinical Hematology, Montpellier University Hospital, 34295, Montpellier, France
| | - Léa Domitien
- Division of Hematologic Diseases, Department of Pediatrics, Montpellier University Hospital, University Montpellier, Montpellier, France
| | - Neila Arrada
- Pathogenesis and Control of Chronic Infections, University of Montpellier, INSERM, EFS, Montpellier University Medical Centre, 34090, Montpellier, France
| | - Delphine Chiffre
- Department of Biological Hematology, Montpellier University Medical Centre & University of Montpellier, Montpellier, France
| | - Perrine Mahe
- Division of Hematologic Diseases, Department of Pediatrics, Montpellier University Hospital, University Montpellier, Montpellier, France.,Reference Center on Rare Red Cell Disorders, Montpellier University Medical Centre, Montpellier, France
| | - Laure Vincent
- Department of Clinical Hematology, Montpellier University Hospital, 34295, Montpellier, France
| | - Patricia Aguilar-Martinez
- Department of Biological Hematology, Montpellier University Medical Centre & University of Montpellier, Montpellier, France.,Reference Center on Rare Red Cell Disorders, Montpellier University Medical Centre, Montpellier, France
| | - Vincent Foulongne
- Pathogenesis and Control of Chronic Infections, University of Montpellier, INSERM, EFS, Montpellier University Medical Centre, 34090, Montpellier, France
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12
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Di Paola N, Mesquita FS, Oliveira DBLD, Villabona-Arenas CJ, Zaki Pour S, de Sousa-Capra C, Lopes GP, Santana RAF, Pinho JRR, Balarini K, Pereira da Fonseca CRT, Zanotto PMDA. An Outbreak of Human Parvovirus B19 Hidden by Dengue Fever. Clin Infect Dis 2020; 68:810-817. [PMID: 30304533 DOI: 10.1093/cid/ciy630] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Accepted: 08/01/2018] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND Seasonal outbreaks of dengue often result in hundreds of dengue-suspected cases where a clinical diagnosis cannot be confirmed. Usually, during large outbreaks of dengue and other pathogens that can cause acute febrile illnesses, the search for secondary pathogens with similar disease outcomes is rare. METHODS Using total RNA sequencing and targeted diagnostic assays, we discovered an outbreak of parvovirus B19 in dengue-suspected patients that occurred from November 2013 to February 2014. RESULTS Of the 182 cases investigated, 63% were viremic for the B19 virus. Moreover, we found that >43% of infected patients had no serological evidence of prior infection. Parvovirus B19 is a typical childhood infection, yet we observed that 82% of the infected patients were adults. Additionally, we perceived that infected adults had significantly higher presentations of myalgia than in children. We also obtained viral protein (VP) 1/VP2 gene nucleotide sequences from 43 patients. CONCLUSIONS Our results support the utility of next-generation sequencing for symptomatic patients with unknown etiologies during seasonal outbreaks of dengue and other arborviruses. Our findings could improve the vigilance of hospitals and laboratories by raising awareness of co-circulating pathogens such as parvovirus B19 that may be hidden in plain sight.
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Affiliation(s)
- Nicholas Di Paola
- Department of Microbiology, Institute of Biomedical Sciences, University of Sao Paulo, Brazil
| | - Flávio S Mesquita
- Department of Microbiology, Institute of Biomedical Sciences, University of Sao Paulo, Brazil
| | | | - Christian Julián Villabona-Arenas
- Recherches translationelles sur le virus de l'immunodéficience et les maladies infectieuses, Institut de Recherche pour le Développement, University of Montpellier, Institut national de la santé et de la recherche médicale, France
| | - Shahab Zaki Pour
- Department of Microbiology, Institute of Biomedical Sciences, University of Sao Paulo, Brazil
| | | | | | | | - João Renato Rebello Pinho
- Hospital Israelita Albert Einstein, Brazil.,Laboratório de Medicina Laboratorial/Laboratório de Gastroenterologia Clínica e Experimental Faculdade de Medicina da Universidade de São Paulo, Brazil
| | - Karime Balarini
- Itapema Laboratório de Análises Clínicas, Guarujá, São Paulo, Brazil
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13
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Microsphere-Based IgM and IgG Avidity Assays for Human Parvovirus B19, Human Cytomegalovirus, and Toxoplasma gondii. mSphere 2020; 5:5/2/e00905-19. [PMID: 32188754 PMCID: PMC7082144 DOI: 10.1128/msphere.00905-19] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Human parvovirus B19, human cytomegalovirus, and Toxoplasma gondii are ubiquitous pathogens. Their infections are often asymptomatic or mild in the general population yet may be transmitted from mother to fetus during pregnancy. Maternal infections by these pathogens can cause severe complications to the fetus or congenital abnormalities. As a rule, the risk of maternal transmission is critically related to the infection time; hence, it is important to determine when a pregnant woman has acquired the infection. In this study, we developed new diagnostic approaches for the timing of infections by three pathogens. All the new assays appeared to be highly sensitive and specific, providing powerful tools for medical diagnosis. Human parvovirus B19 (here B19), human cytomegalovirus (HCMV), and Toxoplasma gondii infections during pregnancy can lead to severe complications. While traditional diagnosis of infections is mostly confined to one pathogen at a time, a multiplex array is a feasible alternative to improve diagnostic management and cost-efficiency. In the present study, for these three pathogens, we developed microsphere-based suspension immunoassays (SIAs) in multiplex and monoplex formats for the detection of antimicrobial IgM antibodies as well as corresponding chaotrope-based IgG avidity SIAs. We determined the diagnostic performances of the SIAs versus in-house and commercial reference assays using a panel of 318 serum samples from well-characterized clinical cohorts. All the newly developed assays exhibited excellent performance compared to the corresponding high-quality reference methods. The positive and negative percent agreements of the IgM SIAs in comparison with reference methods were 95 to 100% and 98 to 100%, and those of the IgG avidity SIAs were 92 to 100% and 95 to 100%, respectively. Kappa efficiency values between the SIAs and the corresponding reference assays were 0.91 to 1. Furthermore, with another panel comprising 391 clinical samples from individuals with primary infection by B19, HCMV, or T. gondii, the IgM SIAs were highly sensitive for the detection of acute infections, and the IgG avidity SIAs were highly specific for the separation of primary infections from past immunity. Altogether, the strategy of IgM multiplex screening followed by IgG avidity reflex testing can provide high-throughput and accurate means for the detection and stage determination of B19, HCMV, and T. gondii infections. IMPORTANCE Human parvovirus B19, human cytomegalovirus, and Toxoplasma gondii are ubiquitous pathogens. Their infections are often asymptomatic or mild in the general population yet may be transmitted from mother to fetus during pregnancy. Maternal infections by these pathogens can cause severe complications to the fetus or congenital abnormalities. As a rule, the risk of maternal transmission is critically related to the infection time; hence, it is important to determine when a pregnant woman has acquired the infection. In this study, we developed new diagnostic approaches for the timing of infections by three pathogens. All the new assays appeared to be highly sensitive and specific, providing powerful tools for medical diagnosis.
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14
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Performance of Zika Assays in the Context of Toxoplasma gondii, Parvovirus B19, Rubella Virus, and Cytomegalovirus (TORCH) Diagnostic Assays. Clin Microbiol Rev 2019; 33:33/1/e00130-18. [PMID: 31826871 DOI: 10.1128/cmr.00130-18] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Infections during pregnancy that may cause congenital abnormalities have been recognized for decades, but their diagnosis is challenging. This was again illustrated with the emergence of Zika virus (ZIKV), highlighting the inherent difficulties in estimating the extent of pre- and postnatal ZIKV complications because of the difficulties in establishing definitive diagnoses. We reviewed the epidemiology, infection kinetics, and diagnostic methods used for Toxoplasma gondii, parvovirus B19, rubella virus, and cytomegalovirus (TORCH) infections and compared the results with current knowledge of ZIKV diagnostic assays to provide a basis for the inclusion of ZIKV in the TORCH complex evaluations. Similarities between TORCH pathogens and ZIKV support inclusion of ZIKV as an emerging TORCH infection. Our review evaluates the diagnostic performance of various TORCH diagnostic assays for maternal screening, fetal screening, and neonatal screening. We show that the sensitivity, specificity, and positive and negative predictive value of TORCH complex pathogens are widely variable, stressing the importance of confirmatory testing and the need for novel techniques for earlier and accurate diagnosis of maternal and congenital infections. In this context it is also important to acknowledge different needs and access to care for different geographic and resource settings.
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15
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Sabahi M, Salehipour A, Kazemi A, Sadeghi M, Decaro N, Mozhgani SH, Jalilian FA, Yaghoobi MH. Prevalence and disease association of human parvovirus B19 in Iran: a systematic review. Future Virol 2019. [DOI: 10.2217/fvl-2019-0046] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Aim: The prevalence of human parvovirus B19 (B19V) and its association with other diseases in Iran are yet to be systematically assessed. This study aimed to evaluate the prevalence and disease association of B19V across Iran from 2000 to 2019. Methods: The literature search, based on different keywords in different databases, was performed. A total of 29 eligible studies were included and the essential information was collected from each article. Results: The results of this study show a relatively high prevalence of the B19V-associated diseases in all age groups of the Iranian population. Conclusion: The transmission of B19V and its complications should be prevented by developing preventative strategies.
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Affiliation(s)
- Mohammadmahdi Sabahi
- Student Research Committee, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Arash Salehipour
- Student Research Committee, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Azin Kazemi
- Student Research Committee, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Mohammadreza Sadeghi
- Department of Virology, Haartman Institute, University of Helsinki, Helsinki, Finland
| | - Nicola Decaro
- Department of Animal Health & Well-Being, Faculty of Veterinary Medicine of Bari, University of Bari, Bari, Italy
| | - Sayed-Hamidreza Mozhgani
- Department of Microbiology, School of Medicine, Alborz University of Medical Sciences, Karaj, Iran
- Non-Communicable Diseases Research Center, Alborz University of Medical Sciences, Karaj, Iran
| | - Farid Azizi Jalilian
- Department of Virology, Faculty of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Mojtaba Hedayat Yaghoobi
- Department of Infectious Disease, School of Medicine, Alborz University of Medical Sciences, Karaj, Iran
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16
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Abstract
Parvoviruses are structurally simple viruses with linear single-stranded DNA genomes and nonenveloped icosahedral capsids. They infect a wide range of animals from insects to humans. Parvovirus B19 is a long-known human pathogen, whereas adeno-associated viruses are nonpathogenic. Since 2005, many parvoviruses have been discovered in human-derived samples: bocaviruses 1-4, parvovirus 4, bufavirus, tusavirus, and cutavirus. Some human parvoviruses have already been shown to cause disease during acute infection, some are associated with chronic diseases, and others still remain to be proven clinically relevant-or harmless commensals, a distinction not as apparent as it might seem. One initially human-labeled parvovirus might not even be a human virus, whereas another was originally overlooked due to inadequate diagnostics. The intention of this review is to follow the rocky road of emerging human parvoviruses from discovery of a DNA sequence to current and future clinical status, highlighting the perils along the way.
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17
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Bodewes R, Kerkhof J, Cremer J, Gijselaar DB, Voordouw BCG, Veldhuijzen IK, Schipper M, van Binnendijk R. Oral fluid: Non-invasive alternative for parvovirus B19 diagnosis? J Clin Virol 2019; 117:5-10. [PMID: 31128380 DOI: 10.1016/j.jcv.2019.05.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Revised: 04/18/2019] [Accepted: 05/17/2019] [Indexed: 11/18/2022]
Abstract
BACKGROUND Infections with parvovirus B19 (B19V) have been associated with a wide range of disease manifestations of which erythema infectiosum (fifth disease) in children is most common. Clinical signs following infection of children with B19V can be similar to measles and rubella. Laboratory detection of B19V infections is based on detection of B19V-specific IgM antibodies by enzyme immunoassay (IgM-EIA) and/or B19V DNA by quantitative PCR (qPCR) on blood samples. The need for invasive sampling can be a barrier for public health diagnostics. OBJECTIVES To evaluate the use of a dual target B19V-qPCR directed against the NS1 and VP2 of B19V on oral fluid samples as a non-invasive alternative for laboratory diagnosis of B19V infections in children below 12 years of age with exanthema. STUDY DESIGN Oral fluid and serum samples were collected from 116 children with exanthema. All serum samples were tested by IgM-EIA/IgG-EIA, while all oral fluid and 56 serum samples were tested by B19V-qPCR. RESULTS B19V-specific IgM antibodies were detected in 25 of 116 children in the study. B19V DNA was detected in oral fluid in 17 of the 25 children who were IgM positive, as well as two children who were IgM-equivocal or negative. The child with the equivocal IgM had a high quantity of B19V DNA in oral fluid (7 log IU/ml), compatible with an acute B19V infection. The IgM-negative child was IgG-positive and 4 log IU/ml B19V DNA was detected in the oral fluid sample, suggesting an acute infection and a falsely negative IgM. Sample size calculations indicated that oral fluid samples for qPCR should be collected from 2 to 3 children during outbreaks of exanthema to achieve similar sensitivity as IgM-EIA for one child (≥0.9) to confirm or exclude B19V. CONCLUSIONS Results indicate that oral fluid samples are a suitable public health alternative for detection of B19V infections, potentially lowering the barriers for sampling.
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Affiliation(s)
- Rogier Bodewes
- Center for Infectious Disease Research, Diagnostics and Laboratory Surveillance, National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands.
| | - Jeroen Kerkhof
- Center for Infectious Disease Research, Diagnostics and Laboratory Surveillance, National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands
| | - Jeroen Cremer
- Center for Infectious Disease Research, Diagnostics and Laboratory Surveillance, National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands
| | - Daphne B Gijselaar
- Center for Infectious Disease Research, Diagnostics and Laboratory Surveillance, National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands
| | - Bettie C G Voordouw
- Center for Infectious Disease Research, Diagnostics and Laboratory Surveillance, National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands; Department of Viroscience, ErasmusMC, Rotterdam, The Netherlands
| | - Irene K Veldhuijzen
- Centre for Infectious Diseases, Epidemiology and Surveillance, National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands
| | - Maarten Schipper
- Department of Statistics, Computer Science and Modelling - SIM, National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands
| | - Rob van Binnendijk
- Centre for Immunology of Infectious Diseases and Vaccines, National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands
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18
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Slavov SN, Rodrigues ES, Sauvage V, Caro V, Diefenbach CF, Zimmermann AM, Covas DT, Laperche S, Kashima S. Parvovirus B19 seroprevalence, viral load, and genotype characterization in volunteer blood donors from southern Brazil. J Med Virol 2019; 91:1224-1231. [PMID: 30851123 DOI: 10.1002/jmv.25453] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Revised: 02/12/2019] [Accepted: 03/01/2019] [Indexed: 12/15/2022]
Abstract
Usually transmitted via respiratory droplets, parvovirus B19 (B19V) can also be acquired by blood transfusion especially because of viral persistence, resistance to blood treatment procedures, and high viral load during the early infection phase. This is particularly problematic in immunocompromised or anemic patients where the infection can have a severe outcome. As B19V DNA was detected in blood donations from South Brazil during a viral metagenomic survey performed by Next-Generation Sequencing, the objective of this retrospective study was to evaluate the seroprevalence, B19V DNA presence and circulating genotypes in a Hospital Blood Transfusion Service in Santa Maria city in South Brazil (Rio Grande do Sul state). Among 480 volunteer blood donors, 53.9% (n = 258 of 479) were anti-B19V IgG-positive, and 9 (1.9%) plasma samples presented B19V DNA. In almost all cases (n = 7 of 9, 77.8%), B19V DNA load was accompanied by the presence of anti-B19V IgG suggesting a persistent infection. The sequencing of the strains demonstrated that all belong to genotype 1 which is the most prevalent worldwide. The analysis of the recipient information of the positive for B19V DNA units revealed no related posttransfusion adverse effects. Our results demonstrate for the first time, B19V seroprevalence, viral load, and genotypes among blood donors from South Brazil and give a light for the circulation and impact of this B19V in this part of the country.
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Affiliation(s)
- Svetoslav N Slavov
- Laboratory of Molecular Biology, Blood Center of Ribeirão Preto, Faculty of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil.,Department of Internal Medicine, Faculty of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Evandra S Rodrigues
- Laboratory of Molecular Biology, Blood Center of Ribeirão Preto, Faculty of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Virginie Sauvage
- Département d'études des Agents Transmissibles par le Sang (DATS), Centre National de Référence Risques Infectieux Transfusionnels, Institut National de la Transfusion Sanguine (INTS), Paris, France
| | - Valérie Caro
- Pole for Genotyping of Pathogens (PGP), Laboratory for Urgent Response to Biological Threats, Environment and Infectious Risks Research and Expertise Unit, Institut Pasteur, Paris, France
| | - Cristiane F Diefenbach
- Department of Internal Medicine, University Hospital of Santa Maria, Federal University of Santa Maria, Santa Maria, Rio Grande do Sul, Brazil
| | - Ana M Zimmermann
- Hematology Department, Hemotherapy Service, Hospital "Dr. Astrogildo de Azevedo", Santa Maria, Rio Grande do Sul, Brazil
| | - Dimas T Covas
- Laboratory of Molecular Biology, Blood Center of Ribeirão Preto, Faculty of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Syria Laperche
- Département d'études des Agents Transmissibles par le Sang (DATS), Centre National de Référence Risques Infectieux Transfusionnels, Institut National de la Transfusion Sanguine (INTS), Paris, France
| | - Simone Kashima
- Laboratory of Molecular Biology, Blood Center of Ribeirão Preto, Faculty of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
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19
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Francois KL, Parboosing R, Moodley P. Parvovirus B19 in South African blood donors. J Med Virol 2019; 91:1217-1223. [PMID: 30840773 DOI: 10.1002/jmv.25450] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Revised: 02/01/2019] [Accepted: 02/25/2019] [Indexed: 02/04/2023]
Abstract
BACKGROUND Parvovirus B19 (PVB19) is transmitted via transfusion of blood and blood products. PVB19 is resistant to viral inactivation methods, which poses a threat to blood safety. We investigated the prevalence of PVB19 antibodies and DNA in healthy blood donors from the South African National Blood Bank Service to evaluate the necessity of PVB19 DNA testing. STUDY DESIGN AND METHOD A retrospective analysis of 1500 residual plasma specimens from healthy blood donors from the SANBS repository were screened in mini-pools of 20 for PVB19 DNA using a quantitative polymerase chain reaction (PCR). Positive pools were resolved by individual viral load testing and screened for PVB19 immunoglobulin M (IgM) and immunoglobulin G (IgG) antibodies to correlate viral loads with serological status. PVB19 IgG prevalence was determined by testing 90 randomly selected specimens from the 1500 plasma specimens. RESULTS The prevalence of PVB19 IgG, IgM and IgG, and DNA was 62.2%, 0.06%, and 0.9%, respectively. Fourteen of the 1500 blood donor specimens received, had detectable PVB19 viral loads. Nine of the fourteen donors with detectable viral loads were PVB19 IgG seropositive. The PVB19 viral loads ranged from 1.81 to 5.32 log IU/mL. Four of the fourteen viraemic donors had a viraemia >10 4 IU/mL. CONCLUSION We have demonstrated a low prevalence of PVB19 DNA in SANBS blood donors. The predominance of low-level viraemia and the presence of PVB19 antibodies, suggests that the risk of transfusion transmission of PVB19 among SANBS donors may be relatively low.
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Affiliation(s)
- Kerri Lee Francois
- Department of Virology, National Health Laboratory Service and University of KwaZulu-Natal, Durban, KwaZulu-Natal, South Africa
| | - Raveen Parboosing
- Department of Virology, National Health Laboratory Service and University of KwaZulu-Natal, Durban, KwaZulu-Natal, South Africa
| | - Pravi Moodley
- Department of Virology, National Health Laboratory Service and University of KwaZulu-Natal, Durban, KwaZulu-Natal, South Africa
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20
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Alves ADR, Cubel Garcia RDCN, Cruz OG, Pinto MA, Amado Leon LA. Quantitative real-time PCR for differential diagnostics of parvovirus B19 infection in acute liver failure patients. Expert Rev Mol Diagn 2019; 19:259-266. [DOI: 10.1080/14737159.2019.1582333] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Arthur Daniel Rocha Alves
- Laboratório de Desenvolvimento Tecnológico em Virologia, Instituto Oswaldo cruz, Fundação Oswaldo Cruz, Rio de Janeiro, Brasil
| | | | | | - Marcelo Alves Pinto
- Laboratório de Desenvolvimento Tecnológico em Virologia, Instituto Oswaldo cruz, Fundação Oswaldo Cruz, Rio de Janeiro, Brasil
| | - Luciane Almeida Amado Leon
- Laboratório de Desenvolvimento Tecnológico em Virologia, Instituto Oswaldo cruz, Fundação Oswaldo Cruz, Rio de Janeiro, Brasil
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21
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Affiliation(s)
- Giorgio Gallinella
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy
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22
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Ornoy A, Ergaz Z. Parvovirus B19 infection during pregnancy and risks to the fetus. Birth Defects Res 2018; 109:311-323. [PMID: 28398685 DOI: 10.1002/bdra.23588] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Revised: 08/02/2016] [Accepted: 09/14/2016] [Indexed: 01/30/2023]
Abstract
Parvovirus B19 infects 1 to 5% of pregnant women, generally with normal pregnancy outcomes. During epidemics, the rate of infection is higher. Major congenital anomalies among offspring of infected mothers are rare, as the virus does not appear to be a significant teratogen. However, parvovirus B19 infection may cause significant fetal damage, and in rare cases, brain anomalies and neurodevelopmental insults, especially if infection occurs in the first 20 weeks of pregnancy. Parvovirus B19 is also an important cause of fetal loss, especially in the second half of pregnancy when spontaneous fetal loss from other causes is relatively rare. Parvovirus B19 infection may affect many fetal organs and can cause severe anemia, following fetal erythroid progenitor cells infection and apoptosis, especially in fetuses, that have shortened half-life of erythrocytes. Severe anemia may cause high output cardiac failure and nonimmune hydrops fetalis. In addition, parvovirus B19 may directly infect myocardial cells and produce myocarditis that further aggravates the cardiac failure. Intrauterine fetal transfusion is commonly used for the treatment of severe fetal anemia with survival rates of 75 to 90% and significant reduction of fetal morbidity. Only 66 cases were evaluated neurodevelopmentally, of which 10 (16%) had slight or severe neurodevelopmental problems. Because parvovirus B19 infection can cause severe fetal morbidity and mortality, it should be part of the routine work-up of pregnant women who have been exposed to the virus or of pregnancies with suspected fetal hydrops. Assessment for maternal infection during pregnancy is especially important during epidemics, when sero-conversion rates are high. Birth Defects Research 109:311-323, 2017. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Asher Ornoy
- Laboratory of Teratology, Department of Medical Neurobiology, Hebrew University Hadassah Medical School, Jerusalem, Israel
| | - Zivanit Ergaz
- Laboratory of Teratology, Department of Medical Neurobiology, Hebrew University Hadassah Medical School, Jerusalem, Israel.,Department of Neonatology, Hadassah University Hospital Mount Scopus, Jerusalem, Israel
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23
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Extinct type of human parvovirus B19 persists in tonsillar B cells. Nat Commun 2017; 8:14930. [PMID: 28374737 PMCID: PMC5382274 DOI: 10.1038/ncomms14930] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Accepted: 02/14/2017] [Indexed: 01/06/2023] Open
Abstract
Parvovirus B19 (B19V) DNA persists lifelong in human tissues, but the cell type harbouring it remains unclear. We here explore B19V DNA distribution in B, T and monocyte cell lineages of recently excised tonsillar tissues from 77 individuals with an age range of 2–69 years. We show that B19V DNA is most frequent and abundant among B cells, and within them we find a B19V genotype that vanished from circulation >40 years ago. Since re-infection or re-activation are unlikely with this virus type, this finding supports the maintenance of pathogen-specific humoral immune responses as a consequence of B-cell long-term survival rather than continuous replenishment of the memory pool. Moreover, we demonstrate the mechanism of B19V internalization to be antibody dependent in two B-cell lines as well as in ex vivo isolated tonsillar B cells. This study provides direct evidence for a cell type accountable for B19V DNA tissue persistence. The cell type that hosts parvovirus B19 (B19V) DNA lifelong is currently unknown. Here, the authors identify tonsillar B cells as a reservoir, detect an extinct B19V type in older adults, supporting a long-term association, and show that B19V uptake into B cells is antibody dependent.
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24
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Koskenvuo M. The interaction between viral infections and immunosuppressed hosts is a challenging battle. Pediatr Transplant 2017; 21. [PMID: 28191750 DOI: 10.1111/petr.12811] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Minna Koskenvuo
- Division of Hematology-Oncology and Stem Cell Transplantation, Children's Hospital, University of Helsinki, Helsinki, Finland
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25
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Abstract
Parvovirus B19 (B19V) and human bocavirus 1 (HBoV1), members of the large Parvoviridae family, are human pathogens responsible for a variety of diseases. For B19V in particular, host features determine disease manifestations. These viruses are prevalent worldwide and are culturable in vitro, and serological and molecular assays are available but require careful interpretation of results. Additional human parvoviruses, including HBoV2 to -4, human parvovirus 4 (PARV4), and human bufavirus (BuV) are also reviewed. The full spectrum of parvovirus disease in humans has yet to be established. Candidate recombinant B19V vaccines have been developed but may not be commercially feasible. We review relevant features of the molecular and cellular biology of these viruses, and the human immune response that they elicit, which have allowed a deep understanding of pathophysiology.
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Affiliation(s)
- Jianming Qiu
- Department of Microbiology, Molecular Genetics and Immunology, University of Kansas Medical Center, Kansas City, Kansas, USA
| | | | - Neal S Young
- Hematology Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland, USA
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26
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Koskenvuo M, Rahiala J, Sadeghi M, Waris M, Vuorinen T, Lappalainen M, Norja P, Toppinen M, Saarinen-Pihkala U, Allander T, Söderlund-Venermo M, Hedman K, Ruuskanen O, Vettenranta K. Viremic co-infections in children with allogeneic haematopoietic stem cell transplantation are predominated by human polyomaviruses. Infect Dis (Lond) 2016; 49:35-41. [DOI: 10.1080/23744235.2016.1210821] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
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27
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Toppinen M, Norja P, Aaltonen LM, Wessberg S, Hedman L, Söderlund-Venermo M, Hedman K. A new quantitative PCR for human parvovirus B19 genotypes. J Virol Methods 2015; 218:40-5. [DOI: 10.1016/j.jviromet.2015.03.006] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2014] [Revised: 02/27/2015] [Accepted: 03/09/2015] [Indexed: 11/29/2022]
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28
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Wolfromm A, Rodriguez C, Michel M, Habibi A, Audard V, Benayoun E, Rogier O, Challine D, Chosidow O, Lelièvre JD, Chevalier X, Le Bras F, Pautas C, Imbert M, Pawlotsky JM, Wagner-Ballon O. Spectrum of adult Parvovirus B19 infection according to the underlying predisposing condition and proposals for clinical practice. Br J Haematol 2015; 170:192-9. [PMID: 25920561 DOI: 10.1111/bjh.13421] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2014] [Accepted: 02/21/2015] [Indexed: 12/22/2022]
Abstract
The virological diagnosis of Parvovirus B19 (PvB19) infection is currently based on sero-diagnosis, molecular methods or both, yet without clear recommendations. We retrospectively identified patients with polymerase chain reaction-positive PvB19 and/or positive serological assay between 2007 and 2013. Eighty-two adults with at least one diagnostic criterion of recent PvB19 infection (IgM antibodies, viral DNA in blood and/or in marrow) were included and classified into three homogeneous groups: 30 patients had no underlying predisposing condition, 25 a hereditary haemolytic anaemia, 27 an underlying immunodeficiency. The classical PvB19-related manifestations were less frequent in immunocompromised than in immunocompetent patients (arthromyalgia: 5 vs. 14; erythema: 4 vs. 17, respectively). Only 41·4% of patients with no underlying disease were anaemic. Bicytopenia and pancytopenia were observed mainly in immunocompromised patients. Classical pure red cell aplasia was observed in only 9 of the 27 marrow smears performed. Specific IgM were found in 93% of immunocompetent patients, whereas only 58% had detectable viral DNA in blood. IgM and DNA were present alone or together in all patients with hereditary haemolytic anaemia. In immunocompromised patients, the diagnosis was confirmed by marrow analysis in 91% of cases. We make some proposals based on this large series of PvB19-infected patients.
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Affiliation(s)
- Alice Wolfromm
- Département d'Hématologie et d'Immunologie Biologiques, Hôpital Henri Mondor, APHP, UPEC, Créteil, France
| | - Christophe Rodriguez
- Département de Virologie, Bactériologie-Hygiène, Mycologie-Parasitologie, Hôpital Henri Mondor, APHP, UPEC, Créteil, France.,INSERM U955, Créteil, France
| | - Marc Michel
- Service de Médecine interne, National Referral Centre For Adult Immune Cytopenias, Hôpital Henri Mondor, APHP, UPEC, Créteil, France
| | - Anoosha Habibi
- Unité des Maladies Génétiques du Globule Rouge, Hôpital Henri Mondor, APHP, UPEC, Créteil, France
| | - Vincent Audard
- INSERM U955, Créteil, France.,Service de Néphrologie et de Transplantation, Hôpital Henri Mondor, APHP, UPEC, Créteil, France
| | - Emmanuel Benayoun
- Département d'Hématologie et d'Immunologie Biologiques, Hôpital Henri Mondor, APHP, UPEC, Créteil, France
| | - Olivier Rogier
- Département de Virologie, Bactériologie-Hygiène, Mycologie-Parasitologie, Hôpital Henri Mondor, APHP, UPEC, Créteil, France
| | - Dominique Challine
- Département de Virologie, Bactériologie-Hygiène, Mycologie-Parasitologie, Hôpital Henri Mondor, APHP, UPEC, Créteil, France
| | - Olivier Chosidow
- Service de Dermatologie, Hôpital Henri Mondor, APHP, UPEC, Créteil, France.,French satellite of the Cochrane Skin Group, Créteil, France.,Centre d'Investigation Clinique 006, INSERM, Créteil, France
| | - Jean-Daniel Lelièvre
- INSERM U955, Créteil, France.,Service d'Immunologie clinique et Maladies infectieuses, Hôpital Henri Mondor, APHP, UPEC, Créteil, France
| | - Xavier Chevalier
- Service de Rhumatologie, Hôpital Henri Mondor, APHP, UPEC, Créteil, France
| | - Fabien Le Bras
- Unité Fonctionnelle d'Hémopathies lymphoïdes, Hôpital Henri Mondor, APHP, UPEC, Créteil, France
| | - Cécile Pautas
- Service d'Hématologie clinique, Hôpital Henri Mondor, APHP, UPEC, Créteil, France
| | - Michèle Imbert
- Département d'Hématologie et d'Immunologie Biologiques, Hôpital Henri Mondor, APHP, UPEC, Créteil, France
| | - Jean-Michel Pawlotsky
- Département de Virologie, Bactériologie-Hygiène, Mycologie-Parasitologie, Hôpital Henri Mondor, APHP, UPEC, Créteil, France.,INSERM U955, Créteil, France
| | - Orianne Wagner-Ballon
- Département d'Hématologie et d'Immunologie Biologiques, Hôpital Henri Mondor, APHP, UPEC, Créteil, France.,INSERM U955, Créteil, France
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29
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Hepojoki S, Nurmi V, Vaheri A, Hedman K, Vapalahti O, Hepojoki J. A protein L-based immunodiagnostic approach utilizing time-resolved Förster resonance energy transfer. PLoS One 2014; 9:e106432. [PMID: 25181527 PMCID: PMC4152265 DOI: 10.1371/journal.pone.0106432] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2014] [Accepted: 07/28/2014] [Indexed: 12/16/2022] Open
Abstract
Chelated lanthanides such as europium (Eu) have uniquely long fluorescence emission half-lives permitting their use in time-resolved fluorescence (TRF) assays. In Förster resonance energy transfer (FRET) a donor fluorophore transfers its emission energy to an acceptor fluorophore if in sufficiently close proximity. The use of time-resolved (TR) FRET minimizes the autofluorescence of molecules present in biological samples. In this report, we describe a homogenous immunoassay prototype utilizing TR-FRET for detection of antibodies in solution. The assay is based on labeled protein L, a bacterial protein that binds to immunoglobulin (Ig) light chain, and labeled antigen, which upon association with the same Ig molecule produce a TR-FRET active complex. We show that the approach is functional and can be utilized for both mono- and polyvalent antigens. We also compare the assay performance to that of another homogenous TR-FRET immunoassay reported earlier. This novel assay may have wide utility in infectious disease point-of-care diagnostics.
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Affiliation(s)
- Satu Hepojoki
- Department of Virology, Haartman Institute, University of Helsinki, Helsinki, Finland
| | - Visa Nurmi
- Department of Virology, Haartman Institute, University of Helsinki, Helsinki, Finland
| | - Antti Vaheri
- Department of Virology, Haartman Institute, University of Helsinki, Helsinki, Finland
- Helsinki University Central Hospital, Hospital District of Helsinki and Uusimaa, Laboratory Services, HUSLAB, Helsinki, Finland
| | - Klaus Hedman
- Department of Virology, Haartman Institute, University of Helsinki, Helsinki, Finland
- Helsinki University Central Hospital, Hospital District of Helsinki and Uusimaa, Laboratory Services, HUSLAB, Helsinki, Finland
| | - Olli Vapalahti
- Department of Virology, Haartman Institute, University of Helsinki, Helsinki, Finland
- Helsinki University Central Hospital, Hospital District of Helsinki and Uusimaa, Laboratory Services, HUSLAB, Helsinki, Finland
- Department of Veterinary Biosciences, University of Helsinki, Helsinki, Finland
| | - Jussi Hepojoki
- Department of Virology, Haartman Institute, University of Helsinki, Helsinki, Finland
- * E-mail:
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