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Schmitt C, Hoefsmit EP, Fangmeier T, Kramer N, Kabakci C, Vera González J, Versluis JM, Compter A, Harrer T, Mijočević H, Schubert S, Hundsberger T, Menzies AM, Scolyer RA, Long GV, French LE, Blank CU, Heinzerling LM. Immune checkpoint inhibitor-induced neurotoxicity is not associated with seroprevalence of neurotropic infections. Cancer Immunol Immunother 2023; 72:3475-3489. [PMID: 37606856 PMCID: PMC10576679 DOI: 10.1007/s00262-023-03498-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 07/07/2023] [Indexed: 08/23/2023]
Abstract
BACKGROUND Immune checkpoint inhibitors (ICI) substantially improve outcome for patients with cancer. However, the majority of patients develops immune-related adverse events (irAEs), which can be persistent and significantly reduce quality of life. Neurological irAEs occur in 1-5% of patients and can induce severe, permanent sequelae or even be fatal. In order to improve the diagnosis and treatment of neurological irAEs and to better understand their pathogenesis, we assessed whether previous neurotropic infections are associated with neurological irAEs. METHODS Neurotropic infections that might predispose to ICI-induced neurological irAEs were analyzed in 61 melanoma patients from 3 countries, the Netherlands, Australia and Germany, including 24 patients with neurotoxicity and 37 control patients. In total, 14 viral, 6 bacterial, and 1 protozoal infections previously reported to trigger neurological pathologies were assessed using routine serology testing. The Dutch and Australian cohorts (NL) included pre-treatment plasma samples of patients treated with neoadjuvant ICI therapy (OpACIN-neo and PRADO trials; NCT02977052). In the Dutch/Australian cohort a total of 11 patients with neurological irAEs were compared to 27 control patients (patients without neurological irAEs). The German cohort (LMU) consisted of serum samples of 13 patients with neurological irAE and 10 control patients without any documented irAE under ICI therapy. RESULTS The association of neurological irAEs with 21 possible preceding infections was assessed by measuring specific antibodies against investigated agents. The seroprevalence of all the tested viral (cytomegalovirus, Epstein-Barr-Virus, varicella-zoster virus, measles, rubella, influenza A and B, human herpes virus 6 and 7, herpes simplex virus 1 and 2, parvovirus B19, hepatitis A and E and human T-lymphotropic virus type 1 and 2), bacterial (Borrelia burgdorferi sensu lato, Campylobacter jejuni, Mycoplasma pneumoniae, Coxiella burnetti, Helicobacter pylori, Yersinia enterocolitica and Y. pseudotuberculosis) and protozoal (Toxoplasma gondii) infections was similar for patients who developed neurological irAEs as compared to control patients. Thus, the analysis provided no evidence for an association of described agents tested for seroprevalence with ICI induced neurotoxicity. CONCLUSION Previous viral, bacterial and protozoal neurotropic infections appear not to be associated with the development of neurological irAEs in melanoma patients who underwent therapy with ICI across 3 countries. Further efforts are needed to unravel the factors underlying neurological irAEs in order to identify risk factors for these toxicities, especially with the increasing use of ICI in earlier stage disease.
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Affiliation(s)
- C Schmitt
- Department of Dermatology and Allergy, University Hospital, LMU Munich, Munich, Germany
| | - E P Hoefsmit
- Department of Molecular Oncology and Immunology, Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - T Fangmeier
- Department of Dermatology and Allergy, University Hospital, LMU Munich, Munich, Germany
| | - N Kramer
- Department of Dermatology and Allergy, University Hospital, LMU Munich, Munich, Germany
| | - C Kabakci
- Department of Dermatology and Allergy, University Hospital, LMU Munich, Munich, Germany
| | - J Vera González
- Department of Dermatology, Uniklinikum Erlangen and Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Erlangen, Germany
| | - J M Versluis
- Department of Medical Oncology, Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - A Compter
- Department of Neuro-Oncology, Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - T Harrer
- Department of Internal Medicine 3, Infectious Diseases and Immunodeficiency Section, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
- Deutsches Zentrum Für Immuntherapie (DZI), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) and Universitätsklinikum Erlangen, Erlangen, Germany
| | - H Mijočević
- Max Von Pettenkofer Institute of Hygiene and Medical Microbiology, Faculty of Medicine, LMU Munich, Munich, Germany
| | - S Schubert
- Max Von Pettenkofer Institute of Hygiene and Medical Microbiology, Faculty of Medicine, LMU Munich, Munich, Germany
| | - T Hundsberger
- Departments of Neurology and Medical Oncology/Haematology, Cantonal Hospital, St. Gallen, Switzerland
| | - A M Menzies
- Melanoma Institute of Australia, The University of Sydney, Sydney, NSW, Australia
- Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia
- Department of Medical Oncology, Royal North Shore and Mater Hospitals, Sydney, NSW, Australia
| | - R A Scolyer
- Melanoma Institute of Australia, The University of Sydney, Sydney, NSW, Australia
- Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia
- Charles Perkins Centre, The University of Sydney, Sydney, NSW, Australia
- Tissue Pathology and Diagnostic Oncology, Royal Prince Alfred Hospital and NSW Health Pathology, Sydney, NSW, Australia
| | - G V Long
- Melanoma Institute of Australia, The University of Sydney, Sydney, NSW, Australia
- Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia
- Department of Medical Oncology, Royal North Shore and Mater Hospitals, Sydney, NSW, Australia
- Charles Perkins Centre, The University of Sydney, Sydney, NSW, Australia
| | - L E French
- Department of Dermatology and Allergy, University Hospital, LMU Munich, Munich, Germany
- Dr. Philip Frost, Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, FL, USA
| | - C U Blank
- Department of Molecular Oncology and Immunology, Netherlands Cancer Institute, Amsterdam, The Netherlands
- Department of Medical Oncology, Netherlands Cancer Institute, Amsterdam, The Netherlands
- Department of Medical Oncology, Leiden University Medical Center, Leiden, The Netherlands
| | - L M Heinzerling
- Department of Dermatology and Allergy, University Hospital, LMU Munich, Munich, Germany.
- Department of Dermatology, Uniklinikum Erlangen and Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Erlangen, Germany.
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2
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Chen H, Liang Y, Wang R, Wu Y, Zhang X, Huang H, Yu X, Hong M, Yang J, Liao K, Xu H, Liu M, Chen P, Chen Y. Metagenomic next-generation sequencing for the diagnosis of Pneumocystis jirovecii Pneumonia in critically pediatric patients. Ann Clin Microbiol Antimicrob 2023; 22:6. [PMID: 36647095 PMCID: PMC9841943 DOI: 10.1186/s12941-023-00555-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Accepted: 01/05/2023] [Indexed: 01/18/2023] Open
Abstract
OBJECTIVE The aim of this study was to evaluate the effectiveness of metagenomic next-generation sequencing (mNGS) for the diagnosis of Pneumocystis jirovecii Pneumonia (PCP) in critically pediatric patients. METHODS Seventeen critically pediatric patients with PCP and sixty patients diagnosed with non-PCP pneumonia who were admitted in pediatric intensive care unit between June 2018 and July 2021 were enrolled. Conventional methods and mNGS for detecting Pneumocystis jirovecii (P. jirovecii) were compared. The patients' demographics, comorbidities, laboratory test results, antibiotic treatment response and 30 day mortality were analyzed. RESULT The mNGS showed a satisfying diagnostic performance with a sensitivity of 100% in detecting P. jirovecii compared with Gomori methenamine silver staining (5.9%), serum (1,3)-β-D-glucan (86.7%) and and LDH (55.6%). The diagnostic specificity of mNGS for PCP was higher than that of serum BDG (56.7%) and LDH (71.4%). In PCP group, over one thirds' cases had mixed infections. Compared with survivors, non-survivors had higher stringently mapped read numbers (SMRNs) in bronchoalveolar lavage fluid (BALF) sample (P < 0.05), suggesting SMRNs were closely associated with the severity of response. The detection for P. jirovecii by mNGS both in BALF and blood samples reached a concordance rate of 100%, and the SMRNs in the BALF were remarkably higher than that in blood samples. Initial antimicrobial treatment was modified in 88.2% of PCP patients based on the mNGS results. CONCLUSION The mNGS is a potential and efficient technology in diagnosing PCP and shows a satisfying performance in the detection of co-pathogens. Both blood and BALF samples for mNGS are suggested for the presumptive diagnosis of PCP.
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Affiliation(s)
- Hengxin Chen
- Department of Laboratory Medicine, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510080, Guangdong, China
| | - Yujian Liang
- Department of Pediatric Intensive Care Unit, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510080, Guangdong, China
| | - Ruizhi Wang
- Department of Laboratory Medicine, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510080, Guangdong, China
| | - Yijie Wu
- Zhongshan School of Medicine, Sun Yat-Sen University, Guangdong, China
| | - Xiaoyun Zhang
- Zhongshan School of Medicine, Sun Yat-Sen University, Guangdong, China
| | - Hao Huang
- Department of Laboratory Medicine, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510080, Guangdong, China
| | - Xuegao Yu
- Department of Laboratory Medicine, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510080, Guangdong, China
| | - Mengzhi Hong
- Department of Laboratory Medicine, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510080, Guangdong, China
| | - Juhua Yang
- Vision Medicals Co., Ltd, Guangzhou, China
| | - Kang Liao
- Department of Laboratory Medicine, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510080, Guangdong, China
| | - Hongxu Xu
- Department of Laboratory Medicine, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510080, Guangdong, China
| | - Min Liu
- Department of Laboratory Medicine, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510080, Guangdong, China
| | - Peisong Chen
- Department of Laboratory Medicine, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510080, Guangdong, China.
| | - Yili Chen
- Department of Laboratory Medicine, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510080, Guangdong, China.
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Pattabiraman C, Prasad P, Sudarshan S, George AK, Sreenivas D, Rasheed R, Ghosh A, Pal A, Hameed SKS, Bandyopadhyay B, Desai A, Vasanthapuram R. Identification and Genomic Characterization of Parvovirus B19V Genotype 3 Viruses from Cases of Meningoencephalitis in West Bengal, India. Microbiol Spectr 2022; 10:e0225121. [PMID: 35412386 PMCID: PMC9045363 DOI: 10.1128/spectrum.02251-21] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Accepted: 03/19/2022] [Indexed: 12/03/2022] Open
Abstract
Brain infections are a major public health problem in India and other parts of the world, causing both mortality and lifelong disability. Even after a thorough investigation, many cases remain without an etiological diagnosis. Primate erythroparvovirus 1 (B19V) has been identified as a pathogen associated with undiagnosed meningoencephalitis in other settings, including the United Kingdom, France, and Latvia. Here, we reported 13/403 (3.2%) B19V PCR positive cases of meningoencephalitis in West Bengal, India. The positive samples were mostly from children (10/13, 76.92%) and presented as a spectrum consisting of acute encephalitis (7/13), acute meningoencephalitis (3/13), and meningitis (3/13). Of the 13 cases, 8/13 (61.5%) had no known etiology and 5/13 (38.5%) had a previous etiological diagnosis. The cases did not cluster in time or by location, suggesting sporadic occurrence rather than outbreaks. We were able to retrieve the complete B19V genomes from cerebrospinal fluid (CSF) in 12/13 cases. The sequences clustered into genotype 3b with complete genomes from Brazil, Ghana, and France, and partial genomes from India and Kyrgyzstan. This is the first report of B19V in cases of neurological infections from India. It highlights the need to evaluate the causal relationship between B19V with meningoencephalitis in the country. These were also the first complete genomes of genotype 3b from CSF and will be critical in the evaluation of the relationship between genotypes and disease. IMPORTANCE Cases of meningoencephalitis with no known etiology remain a major challenge to clinical management of brain infections across the world. In this study, we detected and characterized the whole-genome of primate erythroparvovirus 1 (B19V) in cases of meningoencephalitis in India. Our work highlighted the association between B19V and brain infections which has been reported in other countries. Our work also emphasized the need to examine the role of B19V in meningoencephalitis, specifically whether it caused or contributed to the disease together with other pathogens in India. Our study provided the first 12 genomes of B19V from cerebrospinal fluid. These genomes will contribute to an understanding of how the virus is changing across different locations and over time.
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Affiliation(s)
- Chitra Pattabiraman
- Department of Neurovirology, National Institute of Mental Health and Neurosciences, Bengaluru, India
| | - Pramada Prasad
- Department of Neurovirology, National Institute of Mental Health and Neurosciences, Bengaluru, India
| | - Sampada Sudarshan
- Department of Neurovirology, National Institute of Mental Health and Neurosciences, Bengaluru, India
| | - Anson K. George
- Department of Neurovirology, National Institute of Mental Health and Neurosciences, Bengaluru, India
| | - Darshan Sreenivas
- Department of Neurovirology, National Institute of Mental Health and Neurosciences, Bengaluru, India
| | - Risha Rasheed
- Department of Neurovirology, National Institute of Mental Health and Neurosciences, Bengaluru, India
| | - Ayushman Ghosh
- Department of Neurovirology, National Institute of Mental Health and Neurosciences, Bengaluru, India
| | - Ananya Pal
- Department of Microbiology, Calcutta School of Tropical Medicine, Kolkata, India
| | - Shafeeq K. Shahul Hameed
- Department of Neurovirology, National Institute of Mental Health and Neurosciences, Bengaluru, India
| | - Bhaswati Bandyopadhyay
- Virology Unit, Department of Microbiology, Calcutta School of Tropical Medicine, Kolkata, India
| | - Anita Desai
- Department of Neurovirology, National Institute of Mental Health and Neurosciences, Bengaluru, India
| | - Ravi Vasanthapuram
- Department of Neurovirology, National Institute of Mental Health and Neurosciences, Bengaluru, India
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Alves AD, Melgaço JG, Cássia Nc Garcia RD, Raposo JV, de Paula VS, Araújo CC, Pinto MA, Amado LA. Persistence of Parvovirus B19 in liver from transplanted patients with acute liver failure. Future Microbiol 2021; 15:307-317. [PMID: 32286103 DOI: 10.2217/fmb-2019-0224] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Aim: In this study, we investigated the presence of B19V in liver tissues from patients with acute liver failure (ALF) and evaluated the viral activity in infected liver. Methods: Serum and liver samples from 30 patients who underwent liver transplantation for ALF were investigated for B19V infection by real-time PCR, serological tests and examination of B19V mRNA (transcript) expression in the liver. Results: The serum and liver samples from seven patients were B19V DNA positive (103-105 copies/ml). Most of them presented detectable anti-B19V IgG, indicating persistent infection. B19V mRNA was detected in all patients, demonstrating intra-hepatic replication. Conclusion: B19V infection of the liver during the course of non-A-E ALF suggested a role of B19V, which produced the worst outcome in co-infected patients and in patients with cryptogenic ALF, in liver damage.
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Affiliation(s)
- Arthur Dr Alves
- Laboratório de Desenvolvimento Tecnológico em Virologia, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brasil
| | - Juliana G Melgaço
- Laboratório de Desenvolvimento Tecnológico em Virologia, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brasil
| | - Rita de Cássia Nc Garcia
- Departamento de Microbiologia e Parasitologia, Instituto Biomédico, Universidade Federal Fluminense, Niterói, RJ, Brasil
| | - Jessica V Raposo
- Laboratório de Virologia Molecular, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brasil
| | - Vanessa S de Paula
- Laboratório de Virologia Molecular, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brasil
| | | | - Marcelo A Pinto
- Laboratório de Desenvolvimento Tecnológico em Virologia, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brasil
| | - Luciane A Amado
- Laboratório de Desenvolvimento Tecnológico em Virologia, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brasil
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[Pediatric expert consensus on the application of intravenous immunoglobulin in children with hematological/neoplastic diseases]. ZHONGGUO DANG DAI ER KE ZA ZHI = CHINESE JOURNAL OF CONTEMPORARY PEDIATRICS 2021; 23. [PMID: 33840401 PMCID: PMC8050546 DOI: 10.7499/j.issn.1008-8830.2101174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Intravenous immunoglobulin (IVIG) has been widely used in chemotherapy for hematological malignancies, targeted therapy, and hematopoietic stem cell transplantation; however, there are still no available guidelines or consensus statements on the application of IVIG in pediatric hematological/neoplastic diseases at present in China and overseas. This consensus is developed based on the research advances in the application of IVIG in pediatric hematological/neoplastic diseases across the world and provides detailed recommendations for the clinical application of IVIG in pediatric hematological/neoplastic diseases and the prevention and treatment of related adverse reactions.
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Obeid KM. Infections with DNA Viruses, Adenovirus, Polyomaviruses, and Parvovirus B19 in Hematopoietic Stem Cell Transplant Recipients and Patients with Hematologic Malignancies. Infect Dis Clin North Am 2019; 33:501-521. [PMID: 30940465 DOI: 10.1016/j.idc.2019.02.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Infections due to adenovirus, polyomaviruses (BK and JC viruses), and parvovirus B19 may not be as common as infections due to other DNA viruses, such as cytomegalovirus in patients with hematological malignancies and the recipients of hematopoietic stem cell transplantation. However, these infections may result in life-threatening diseases that significantly impact patients' recovery, morbidity, and mortality. Treating physicians should be aware of the diseases associated with these viruses, the patient populations at increased risk for complications due to these infections, and the available diagnostic and therapeutic approaches.
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Affiliation(s)
- Karam M Obeid
- Division of Infectious Diseases and International Medicine, University of Minnesota, 420 Delaware Street SE, MMC250, Minneapolis, MN 55455, USA.
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Das P, Chatterjee K, Chattopadhyay NR, Choudhuri T. Evolutionary aspects of Parvovirus B-19V associated diseases and their pathogenesis patterns with an emphasis on vaccine development. Virusdisease 2019; 30:32-42. [PMID: 31143830 PMCID: PMC6517593 DOI: 10.1007/s13337-019-00525-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Accepted: 03/15/2019] [Indexed: 12/16/2022] Open
Abstract
Parvovirus B-19, a single human pathogenic member of the Parvoviridae family with it's small ssDNA and non-enveloped structure, is known to cause diseases in erythroid progenitor cells. But a wide range of clinical association of this virus with cells of non-erythroid origins has recently been discovered and many of those are being investigated for such association. Higher substitution rates in due course of evolution has been suggested for this cellular tropism and persistence. In this report, we have summarized the different disease manifestations of B-19 virus and have tried to find out a pattern of pathogenesis. Finally, we have focused on the vaccination strategies available against B-19 virus to correlate these with the mechanisms involved in various diseases caused by this virus.
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Affiliation(s)
- Piyanki Das
- Department of Biotechnology, Visva Bharati Santiniketan, Siksha Bhavana, Bolpur, West Bengal 731235 India
| | - Koustav Chatterjee
- Department of Biotechnology, Visva Bharati Santiniketan, Siksha Bhavana, Bolpur, West Bengal 731235 India
| | - Nabanita Roy Chattopadhyay
- Department of Biotechnology, Visva Bharati Santiniketan, Siksha Bhavana, Bolpur, West Bengal 731235 India
| | - Tathagata Choudhuri
- Department of Biotechnology, Visva Bharati Santiniketan, Siksha Bhavana, Bolpur, West Bengal 731235 India
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Aydin H, Timurkan MO, Aktas O. Genetic diversity of primate erythroparvovirus 1 between 2009 and 2016: First report from Turkey. Microb Pathog 2019; 129:131-135. [PMID: 30742946 DOI: 10.1016/j.micpath.2019.02.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Revised: 02/06/2019] [Accepted: 02/07/2019] [Indexed: 10/27/2022]
Abstract
Parvovirus B19 (B19V) is one of the major viral pathogens that infect only human beings. This study's aim is to determine which genotypes of the B19V are present in Turkey and to perform a phylogenetic analysis. Twelve B19V positive serum specimens already diagnosed by real-time PCR amplifying a partial region of the NS gene were included in this study. The serological markers and viral loads of the patients were determined. The positivity of the specimens was confirmed using semi-nested PCR. To determine the genotype of the B19V, PCR-positive amplicons were sequenced directly and compared to GenBank-referenced strain sequences. The phylogeny of the 12 sequenced strains was constructed with the maximum likelihood method. Two different genotypes of B19V were identified in our study. Genotype 2 of B19V was not detected. All of the B19V genotype 1 sequences were clustered in the common genotype 1a cluster (10/12, 83.3%). The average quantification of the B19V strains was determined to be 2.1 × 107 IU/ml. The nucleotide identities between our strains and those isolated in other countries were 85.8%-99.5%. Compared to the Turkish strains identified in our study, at the nucleotide level, the closest strains based on genotypes 3b and 1a were the Germany and Netherlands isolates respectively. This study was the first to provide the genotypic variation of B19V circulated in Turkey. We determined two distinct subtypes of B19V, including subtype 3b and 1a. While the genotype 1 is common all over the world, genotype 3 has begun to spread outside of Africa.
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Affiliation(s)
- Hakan Aydin
- Ataturk University, Faculty of Veterinary Medicine, Department of Virology, 25240, Erzurum, Turkey.
| | - Mehmet Ozkan Timurkan
- Ataturk University, Faculty of Veterinary Medicine, Department of Virology, 25240, Erzurum, Turkey
| | - Osman Aktas
- Ataturk University, Faculty of Medicine, Department of Microbiology, 25240, Erzurum, Turkey
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Affiliation(s)
- Giorgio Gallinella
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy
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