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Wang M, Tan W, Li J, Fang L, Yue M. The Endless Wars: Severe Fever With Thrombocytopenia Syndrome Virus, Host Immune and Genetic Factors. Front Cell Infect Microbiol 2022; 12:808098. [PMID: 35782112 PMCID: PMC9240209 DOI: 10.3389/fcimb.2022.808098] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Accepted: 05/10/2022] [Indexed: 01/10/2023] Open
Abstract
Severe fever with thrombocytopenia syndrome (SFTS) is an emerging arboviral infectious disease with a high rate of lethality in susceptible humans and caused by severe fever with thrombocytopenia syndrome bunyavirus (SFTSV). Currently, neither vaccine nor specific antiviral drugs are available. In recent years, given the fact that both the number of SFTS cases and epidemic regions are increasing year by year, SFTS has become a public health problem. SFTSV can be internalized into host cells through the interaction between SFTSV glycoproteins and cell receptors and can activate the host immune system to trigger antiviral immune response. However, SFTSV has evolved multiple strategies to manipulate host factors to create an optimal environment for itself. Not to be discounted, host genetic factors may be operative also in the never-ending winning or losing wars. Therefore, the identifications of SFTSV, host immune and genetic factors, and their interactions are critical for understanding the pathogenic mechanisms of SFTSV infection. This review summarizes the updated pathogenesis of SFTS with regard to virus, host immune response, and host genetic factors to provide some novel perspectives of the prevention, treatment, as well as drug and vaccine developments.
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Affiliation(s)
- Min Wang
- Department of Infectious Diseases, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Weilong Tan
- Department of Infection Disease, Huadong Research Institute for Medicine and Biotechniques, Nanjing, China
| | - Jun Li
- Department of Infectious Diseases, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Liqun Fang
- State Key Lab Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
- *Correspondence: Liqun Fang, ; Ming Yue,
| | - Ming Yue
- Department of Infectious Diseases, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
- *Correspondence: Liqun Fang, ; Ming Yue,
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Vectors, Hosts, and the Possible Risk Factors Associated with Severe Fever with Thrombocytopenia Syndrome. THE CANADIAN JOURNAL OF INFECTIOUS DISEASES & MEDICAL MICROBIOLOGY = JOURNAL CANADIEN DES MALADIES INFECTIEUSES ET DE LA MICROBIOLOGIE MEDICALE 2021; 2021:8518189. [PMID: 34777671 PMCID: PMC8580678 DOI: 10.1155/2021/8518189] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 09/26/2021] [Accepted: 10/20/2021] [Indexed: 11/17/2022]
Abstract
Severe fever with thrombocytopenia syndrome (SFTS) is a disease caused by infection with the SFTS virus (SFTSV). SFTS has become a crucial public health concern because of the heavy burden, lack of vaccines, effective therapies, and high-fatality rate. Evidence suggests that SFTSV circulates between ticks and animals in nature and is transmitted to humans by tick bites. In particular, ticks have been implicated as vectors of SFTSV, where domestic or wild animals may play as the amplifying hosts. Many studies have identified antigens and antibodies against SFTSV in various animals such as sheep, goats, cattle, and rodents. Besides, person-to-person transmission through contact with blood or mucous of an infected person has also been reported. In this study, we reviewed the literature and summarized the vectors and hosts associated with SFTS and the possible risk factors.
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Dualis H, Zefong AC, Joo LK, Dadar Singh NK, Syed Abdul Rahim SS, Avoi R, Jeffree MS, Hassan MR, Ibrahim MY, Omar A. Factors and outcomes in Severe Fever with Thrombocytopenia Syndrome (SFTS): A systematic review. Ann Med Surg (Lond) 2021; 67:102501. [PMID: 34188913 PMCID: PMC8219640 DOI: 10.1016/j.amsu.2021.102501] [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] [Received: 04/21/2021] [Revised: 06/06/2021] [Accepted: 06/08/2021] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND An emerging infectious zoonosis known as Severe Fever with Thrombocytopenia Syndrome (SFTS) is discovered mainly in Japan, South Korea and China. SFTS virus (SFTSV) which is recently recognised as bunyavirus is borne by ticks such as Haemaphysalis longicornis. It has the capabilities to spread as develop clusters and become a considerable public health threat as this virus could experience rapid evolution via gene mutation. Case fatality rate has been reported up to higher than 30%. The aim of this review is to determine the associated risk factors of SFTS and its outcome. MATERIALS AND METHODS Literature search was conducted using online databases PubMed, ScienceDirect, and Scopus. A total of 517 records were identified from searches in PubMed, ScienceDirect, and Scopus. From the final exclusions, a total of 26 studies were included for final analysis. RESULTS Associated risk factors to getting SFTS infection include occupation, history of bite from a tick, biological susceptibility, and owning of domestic animal. Fatality rates apart from single case reports range from 15.1% to 50% and are contributed by various factors including delay in hospital admission, high viral load, older age group and presence of comorbid and complication. CONCLUSION A seroprevalence study can be conducted amongst the high-risk occupation group such as farmers and agricultural workers, as well as testing cases where viral fever is suspected but available tests for other diseases turns out negative.
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Affiliation(s)
- Herwati Dualis
- Department of Community and Family Medicine, Faculty of Medicine and Health Sciences, Universiti Malaysia Sabah, Jalan UMS, 88400, Kota Kinabalu, Sabah, Malaysia
| | - Abraham Chin Zefong
- Department of Community and Family Medicine, Faculty of Medicine and Health Sciences, Universiti Malaysia Sabah, Jalan UMS, 88400, Kota Kinabalu, Sabah, Malaysia
| | - Lim Kai Joo
- Department of Community and Family Medicine, Faculty of Medicine and Health Sciences, Universiti Malaysia Sabah, Jalan UMS, 88400, Kota Kinabalu, Sabah, Malaysia
| | - Narinderjeet Kaur Dadar Singh
- Department of Community and Family Medicine, Faculty of Medicine and Health Sciences, Universiti Malaysia Sabah, Jalan UMS, 88400, Kota Kinabalu, Sabah, Malaysia
| | - Syed Sharizman Syed Abdul Rahim
- Department of Community and Family Medicine, Faculty of Medicine and Health Sciences, Universiti Malaysia Sabah, Jalan UMS, 88400, Kota Kinabalu, Sabah, Malaysia
| | - Richard Avoi
- Department of Community and Family Medicine, Faculty of Medicine and Health Sciences, Universiti Malaysia Sabah, Jalan UMS, 88400, Kota Kinabalu, Sabah, Malaysia
| | - Mohammad Saffree Jeffree
- Department of Community and Family Medicine, Faculty of Medicine and Health Sciences, Universiti Malaysia Sabah, Jalan UMS, 88400, Kota Kinabalu, Sabah, Malaysia
| | - Mohd Rohaizat Hassan
- Department of Community Health, National University of Malaysia Medical Center, 56000, Kuala Lumpur, Malaysia
| | - Mohd Yusof Ibrahim
- Department of Community and Family Medicine, Faculty of Medicine and Health Sciences, Universiti Malaysia Sabah, Jalan UMS, 88400, Kota Kinabalu, Sabah, Malaysia
| | - Azizan Omar
- Department of Community and Family Medicine, Faculty of Medicine and Health Sciences, Universiti Malaysia Sabah, Jalan UMS, 88400, Kota Kinabalu, Sabah, Malaysia
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Fang X, Hu J, Peng Z, Dai Q, Liu W, Liang S, Li Z, Zhang N, Bao C. Epidemiological and clinical characteristics of severe fever with thrombocytopenia syndrome bunyavirus human-to-human transmission. PLoS Negl Trop Dis 2021; 15:e0009037. [PMID: 33930022 PMCID: PMC8087050 DOI: 10.1371/journal.pntd.0009037] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Accepted: 12/07/2020] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Severe fever with thrombocytopenia syndrome (SFTS) was listed as one of the most severe infectious disease by world health organization in 2017. It can mostly be transmitted by tick bite, while human-to-human transmission has occurred on multiple occasions. This study aimed to explore the epidemiological and clinical characteristics and make risk analysis of SFTS human-to-human transmission. METHODS Descriptive and spatial methods were employed to illustrate the epidemiological and clinical characteristics of SFTS human-to-human transmission. The risk of SFTS human-to-human transmission was accessed through secondary attack rate (SAR) and basic reproductive number (R0). Logistic regression analysis was used to identify the associated risk factors. RESULTS A total of 27 clusters of SFTS human-to-human transmission were reported in China and South Korea during 1996-2019. It mainly occurred among elder people in May, June and October in central and eastern China. The secondary cases developed milder clinical manifestation and better outcome than the index cases. The incubation period was 10.0 days (IQR:8.0-12.0), SAR was 1.72%-55.00%, and the average R0 to be 0.13 (95%CI:0.11-0.16). Being blood relatives of the index case, direct blood/bloody secretion contact and bloody droplet contact had more risk of infection (OR = 6.35(95%CI:3.26-12.37), 38.01 (95%CI,19.73-73.23), 2.27 (95%CI,1.01-5.19)). CONCLUSIONS SFTS human-to-human transmission in China and South Korea during 1996-2019 had obvious spatio-temporal distinction. Ongoing assessment of this transmission risk is crucial for public health authorities though it continues to be low now.
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Affiliation(s)
- Xinyu Fang
- Jiangsu Provincial Center for Disease Control and Prevention (Jiangsu institution of Public health), Nanjing, China
| | - Jianli Hu
- Jiangsu Provincial Center for Disease Control and Prevention (Jiangsu institution of Public health), Nanjing, China
| | - Zhihang Peng
- School of Public Health, Nanjing Medical University, Nanjing, China
| | - Qigang Dai
- Jiangsu Provincial Center for Disease Control and Prevention (Jiangsu institution of Public health), Nanjing, China
| | - Wendong Liu
- Jiangsu Provincial Center for Disease Control and Prevention (Jiangsu institution of Public health), Nanjing, China
| | - Shuyi Liang
- Jiangsu Provincial Center for Disease Control and Prevention (Jiangsu institution of Public health), Nanjing, China
| | - Zhifeng Li
- Jiangsu Provincial Center for Disease Control and Prevention (Jiangsu institution of Public health), Nanjing, China
| | - Nan Zhang
- Jiangsu Provincial Center for Disease Control and Prevention (Jiangsu institution of Public health), Nanjing, China
| | - Changjun Bao
- Jiangsu Provincial Center for Disease Control and Prevention (Jiangsu institution of Public health), Nanjing, China
- School of Public Health, Nanjing Medical University, Nanjing, China
- NHC Key laboratory of Enteric Pathogenic Microbiology, Nanjing, China
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Mao L, Deng B, Liang Y, Liu Y, Wang Z, Zhang J, Wu W, Yu L, Yao W. Epidemiological and genetic investigation of a cluster of cases of severe fever with thrombocytopenia syndrome bunyavirus. BMC Infect Dis 2020; 20:346. [PMID: 32410583 PMCID: PMC7227288 DOI: 10.1186/s12879-020-05072-w] [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: 08/19/2019] [Accepted: 05/04/2020] [Indexed: 01/17/2023] Open
Abstract
Background To analyze and discuss the transmission route of a cluster of cases of severe fever with thrombocytopenia syndrome bunyavirus (SFTSV). Method We performed an epidemiological investigation and a genetic analysis of patients with severe fever with thrombocytopenia syndrome (SFTS) caused by SFTSV, their close contacts and the surrounding population. Results We found that all patients had contact with the blood of the first patient. The comparison of gene sequences in the three isolated SFTSV strains showed that the strains were closely related. Six close contacts and nine individuals in the surrounding population were positive for SFTSV IgM antibody. Conclusion We suspect that the cluster outbreak was transmitted via blood and that the natural reservoir host of SFTSV exists in the patients’ environment.
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Affiliation(s)
- Lingling Mao
- Liaoning Province Center for Disease Control and Prevention, Shenyang, Liaoning Province, China
| | - Baocheng Deng
- Department of Infectious Diseases, The First Affiliated Hospital, China Medical University, Shenyang, Liaoning Province, China
| | - Yuhong Liang
- Dalian Center for Disease Control and Prevention, Dalian, Liaoning Province, China
| | - Yun Liu
- Liaoning Province Center for Disease Control and Prevention, Shenyang, Liaoning Province, China
| | - Zijiang Wang
- Liaoning Province Center for Disease Control and Prevention, Shenyang, Liaoning Province, China
| | - Jie Zhang
- Liaoning Province Center for Disease Control and Prevention, Shenyang, Liaoning Province, China
| | - Wei Wu
- Dalian Center for Disease Control and Prevention, Dalian, Liaoning Province, China
| | - Lei Yu
- Dalian Center for Disease Control and Prevention, Dalian, Liaoning Province, China
| | - Wenqing Yao
- Liaoning Province Center for Disease Control and Prevention, Shenyang, Liaoning Province, China.
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Du Y, Cheng N, Li Y, Wang H, You A, Su J, Nie Y, Ma H, Xu B, Huang X. Seroprevalance of antibodies specific for severe fever with thrombocytopenia syndrome virus and the discovery of asymptomatic infections in Henan Province, China. PLoS Negl Trop Dis 2019; 13:e0007242. [PMID: 31765376 PMCID: PMC6901261 DOI: 10.1371/journal.pntd.0007242] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2019] [Revised: 12/09/2019] [Accepted: 10/04/2019] [Indexed: 12/03/2022] Open
Abstract
Background Severe fever with thrombocytopenia syndrome (SFTS) is a severe emerging disease caused by SFTS virus (SFTSV), and the geographical distribution of SFTS has been increasing throughout China in recent years. To assess SFTSV-specific antibody seroprevalence, a cross-sectional study was conducted for healthy people in high SFTS endemic areas of Henan province in 2016. Methods This study used a stratified random sampling method to select 14 natural villages as the investigation sites. From April to May 2016, participants completed a questionnaire survey and serum samples were collected. All serum samples were subjected to ELISA to detect SFTSV-specific IgM and IgG. All IgM-positive samples were further tested by real-time RT-PCR, and isolation of virus from serum was attempted. Any participant who was IgM-positive was followed up with a month later to confirm health status. Results In total, 1463 healthy people participated in this study. The average seropositive rates for SFTSV-specific IgG and IgM were 10.46% (153/1463) and 0.82% (12/1463), respectively. IgM was detected in 12 individuals, and SFTSV RNA was detected in six of them. Virus was isolated from five of the six SFTSV RNA-positive individuals, and phylogenetic analyses revealed that all five isolates belonged to SFTSV group A. No IgM-positive participants exhibited any symptoms or other signs of illness at the one-month follow up. Conclusions This study identified a relatively high incidence of SFTSV-specific antibody seropositivity in healthy people in Xinyang city. Moreover, our data provide the first evidence for asymptomatic SFTSV infections, which may have significant implications for SFTS outbreak control. Severe fever with thrombocytopenia syndrome (SFTS) is a severe emerging infectious disease caused by SFTS virus (SFTSV) that was first discovered in rural areas of China. Henan province has had the largest number of SFTS cases in China every year since the disease was discovered, however, seropositivity for SFTSV-specific antibodies in healthy people in this region is still not clear. To address this issue, a cross-sectional survey was performed in high endemic areas from April to May 2016. The results showed that SFTSV seroprevalence was relatively high and possibly increasing. Notably, SFTSV RNA, as well as virus itself, was isolated from specimens obtained from healthy people. This study confirmed there are asymptomatic SFTSV infections in humans, and it is the first to report SFTSV isolation from healthy people.
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Affiliation(s)
- Yanhua Du
- Henan Center for Disease Control and Prevention, Zhengzhou, China
- Henan Key Laboratory of Pathogenic Microorganisms, Zhengzhou, China
| | - Ningning Cheng
- Kaifeng Center for Disease Control and Prevention, Kaifeng, China
| | - Yi Li
- Henan Center for Disease Control and Prevention, Zhengzhou, China
- Henan Key Laboratory of Pathogenic Microorganisms, Zhengzhou, China
| | - Haifeng Wang
- Henan Center for Disease Control and Prevention, Zhengzhou, China
| | - Aiguo You
- Henan Center for Disease Control and Prevention, Zhengzhou, China
| | - Jia Su
- Henan Center for Disease Control and Prevention, Zhengzhou, China
| | - Yifei Nie
- Henan Center for Disease Control and Prevention, Zhengzhou, China
| | - Hongxia Ma
- Henan Center for Disease Control and Prevention, Zhengzhou, China
- Henan Key Laboratory of Pathogenic Microorganisms, Zhengzhou, China
| | - Bianli Xu
- Henan Center for Disease Control and Prevention, Zhengzhou, China
- Henan Key Laboratory of Pathogenic Microorganisms, Zhengzhou, China
- * E-mail: (BX); (XH)
| | - Xueyong Huang
- Henan Center for Disease Control and Prevention, Zhengzhou, China
- Henan Key Laboratory of Pathogenic Microorganisms, Zhengzhou, China
- Henan Collaborative Innovation Center of Molecular Diagnosis and Laboratory Medicine, Xinxiang, China
- * E-mail: (BX); (XH)
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Qi R, Qin XR, Wang L, Han HJ, Cui F, Yu H, Liu JW, Yu XJ. Severe fever with thrombocytopenia syndrome can masquerade as hemorrhagic fever with renal syndrome. PLoS Negl Trop Dis 2019; 13:e0007308. [PMID: 30925154 PMCID: PMC6457554 DOI: 10.1371/journal.pntd.0007308] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 04/10/2019] [Accepted: 03/15/2019] [Indexed: 12/23/2022] Open
Abstract
Background Severe fever with thrombocytopenia syndrome (SFTS) is an emerging viral hemorrhagic fever with a high fatality rate and high frequency of person-to-person transmission and is caused by SFTSV, a tick-borne Phlebovirus. Because SFTS has similar clinical manifestations and epidemic characters (such as spatial and temporal distributions) with hemorrhagic fever with renal syndrome (HFRS) in China, we reason that SFTS patients might be misdiagnosed as HFRS. Methodology/principal findings Acute-phase sera of 128 clinically diagnosed HFRS patients were retrospectively analyzed for Hantavirus IgM antibodies with ELISA. Hantavirus-negative patients’ sera were further analyzed for SFTSV IgM antibodies with ELISA. ELISA showed that 73 of 128 (57.0%) of clinically diagnosed HFRS patients were IgM antibody positive to Hantaviruses. Among the 55 Hantavirus-IgM negative patients, four (7.3%) were IgM antibody positive to SFTSV. The results indicated that the four SFTS patients were misdiagnosed as HFRS. The misdiagnosed SFTS patients had clinical manifestations common to HFRS and were unable to be differentiated from HFRS clinically. Conclusions Our study showed that SFTS patients could be clinically misdiagnosed as HFRS. The misdiagnosis of SFTS as HFRS causes particular concern because it may increase the risk of death of SFTS patients and person-to-person transmission of SFTSV without proper care for and isolation of SFTS patients. SFTS were clinically misdiagnosed as HFRS. It could cause particular concern in China. Physicians could not rely heavily on the exposure history. Both SFTS and HFRS patients are treated based on the clinical diagnosis in China. Laboratory confirmation of both diseases is not performed in clinical hospitals and the patients’ blood was usually submitted to a local or provincial center for disease control and prevention. In most cases the confirmation diagnosis is to provide retrospective information rather than to guide clinical therapy. Therefore, physicians need to carefully differentiate SFTS and HFRS patients because the fatality of SFTS is much higher than HFRS and SFTS is easily spread from person to person by contacting infected blood or even through aerosol.
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Affiliation(s)
- Rui Qi
- Wuhan University School of Health Sciences, Wuhan, China
- State Key Laboratory of Virology, Wuhan University, Wuhan, China
| | - Xiang-rong Qin
- Wuhan University School of Health Sciences, Wuhan, China
- State Key Laboratory of Virology, Wuhan University, Wuhan, China
| | - Ling Wang
- Zibo Center for Disease Control and Prevention, Zibo City, China
| | - Hui-ju Han
- Wuhan University School of Health Sciences, Wuhan, China
- State Key Laboratory of Virology, Wuhan University, Wuhan, China
| | - Feng Cui
- Zibo Center for Disease Control and Prevention, Zibo City, China
| | - Hao Yu
- Fudan University School of Medicine, Shanghai, China
| | - Jian-wei Liu
- Wuhan University School of Health Sciences, Wuhan, China
- State Key Laboratory of Virology, Wuhan University, Wuhan, China
| | - Xue-jie Yu
- Wuhan University School of Health Sciences, Wuhan, China
- State Key Laboratory of Virology, Wuhan University, Wuhan, China
- * E-mail: ,
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Zhang XA, Guo CT, Lu QB, Hu JG, Cui N, Yang ZD, Peng W, Liu R, Hu CY, Qin SL, Wang XJ, Ding SJ, Huang DD, Liu W, Cao WC. The platelet derived growth factor-B polymorphism is associated with risk of severe fever with thrombocytopenia syndrome in Chinese individuals. Oncotarget 2017; 7:33340-9. [PMID: 27147565 PMCID: PMC5078099 DOI: 10.18632/oncotarget.9043] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2015] [Accepted: 04/11/2016] [Indexed: 01/29/2023] Open
Abstract
Background Severe fever with thrombocytopenia syndrome (SFTS) is an emerging infectious disease caused by a novel bunyavirus named SFTS virus (SFTSV). We hypothesize that host genetic variations may contribute to susceptibility to SFTS. Results Compared with the rs1800818 AA genotype, AG + GG genotypes were significantly associated with increased susceptibility to SFTS (odds ratio, 1.66, 95% confidence interval = 1.28-2.16; P < 0.001). By using the ELISA assay, we observed that PDGF-BB concentration was significantly reduced in acute phase of patients than in the controls (P < 0.001) and recovered patients at 6 month (P = 0.007) and 12 month (P = 0.003). A persistently reduced PDGF-BB was also revealed from the SFTSV-infected C57BL/6J mice (P < 0.001). The rs1800818 G allele was associated with decreased serum PDGF-BB levels in SFTS patients at their early infection (P = 0.015). In accordance, the relative mRNA levels of the at-risk G allele of 1800818 were lower than those of the A allele in heterozygous cell from acute phase of SFTS patients. PDGF-B rs1800818 conferred no susceptibility to severe or fatal outcome in SFTS patients. Materials and Methods An initially small-scale case-control association study guided the selection of platelet derived growth factor-B (PDGF-B) rs1800818 in 1020 SFTS patients and 1353 controls. Functional analyses were conducted to verify the biological significance of rs1800818 polymorphism. Conclusions Our findings suggest that the PDGF-B rs1800818 polymorphism might play a role in mediating the susceptibility to SFTS.
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Affiliation(s)
- Xiao-Ai Zhang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, P. R. China
| | - Chen-Tao Guo
- Graduate School of Anhui Medical University, Hefei, 230032, P. R. China
| | - Qing-Bin Lu
- School of Public Health, Peking University, Beijing, 100191, P. R. China
| | - Jian-Gong Hu
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, P. R. China
| | - Ning Cui
- The 154 Hospital, People's Liberation Army, Xinyang, 464000, P. R. China
| | - Zhen-Dong Yang
- The 154 Hospital, People's Liberation Army, Xinyang, 464000, P. R. China
| | - Wei Peng
- The Shangcheng People's Hospital, Xinyang, 464000, P. R. China
| | - Rong Liu
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, P. R. China
| | - Chun-Yan Hu
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, P. R. China
| | - Shu-Li Qin
- The 154 Hospital, People's Liberation Army, Xinyang, 464000, P. R. China
| | - Xian-Jun Wang
- Shandong Provincial Center for Disease Control and Prevention, Jinan, 250001, P. R. China
| | - Shu-Jun Ding
- Shandong Provincial Center for Disease Control and Prevention, Jinan, 250001, P. R. China
| | - Dou-Dou Huang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, P. R. China.,Graduate School of Anhui Medical University, Hefei, 230032, P. R. China
| | - Wei Liu
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, P. R. China.,Graduate School of Anhui Medical University, Hefei, 230032, P. R. China
| | - Wu-Chun Cao
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, P. R. China
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Two confirmed cases of severe fever with thrombocytopenia syndrome with pneumonia: implication for a family cluster in East China. BMC Infect Dis 2017; 17:537. [PMID: 28774267 PMCID: PMC5541732 DOI: 10.1186/s12879-017-2645-9] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Accepted: 07/27/2017] [Indexed: 12/03/2022] Open
Abstract
Background Severe fever with thrombocytopenia syndrome (SFTS) was first reported in China in 2011. Human-to-human transmission of the virus occurred occasionally in family clusters. However, pneumonia as an onset syndrome was not common in most SFTS cases. Our aim is to report a family cluster of SFTS with clinical manifestation of pneumonia in Shanghai. Methods Epidemiologic investigations were conducted when a family cluster of severe fever with thrombocytopenia syndrome virus (SFTSV) infection was identified in Shanghai in June 2016. Samples were collected from two secondary cases and two close contacts with fever. SFTSV was detected by Real-Time reverse transcription polymerase chain reaction (RT-PCR). Results There were two confirmed STFS cases and one potential index case. The potential index case became ill on 21 May and died on 31 May. Case A had onset from 4 to 23 June and case B from 8 June to 25 June. All the three cases experienced pneumonia at the early stage of SFTSV infection. Three (3) out of thirty two (32) close contacts had symptoms of fever or cough but were detected STFSV negative by real-time RT-PCR. According to epidemiologic investigations, the potential index case had outdoor activities on a nearby hill. A tick bite could have been the reason for the SFTSV infection in the potential index case as ticks were found both in grassland or shrubs on the hill and also found on mice caught in her house. Both cases A and B had provided bedside care for the potential index case without any protection and had contacted with blood and other body fluids. Conclusion It was a family cluster of SFTSV infection imported from Jiangsu province located in the east of China. We suggested to become alert to atypical SFTSV infected cases.
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He M, Wang J, Chen L, Liu J, Zeng P. The Impact of Emerging Infectious Diseases on Chinese Blood Safety. Transfus Med Rev 2017; 31:94-101. [PMID: 27923518 PMCID: PMC7126663 DOI: 10.1016/j.tmrv.2016.10.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Revised: 09/19/2016] [Accepted: 10/24/2016] [Indexed: 12/16/2022]
Abstract
Emerging infectious diseases (EIDs) have always been one of the major threats to public health. Although the implementation of mandatory testing for 4 classical transfusion-transmitted infectious-human immunodeficiency virus, hepatitis B virus, hepatitis C virus, and syphilis-has reduced the transfusion risk of these pathogens, the potential threat of various EID agents and their constantly evolving variants to blood safety in China is not fully understood. This review presents 9 representative EID agents that are autochthonous and epidemic nationally or regionally in China. The epidemiologic status and distribution of these EID agents among donors and/or healthy populations are summarized. The potential risks of these EID agents to blood safety are discussed. The review also explores strategies to strengthen hemovigilance systems and studies to further evaluate the impact of EID agents on blood safety.
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Affiliation(s)
- Miao He
- Institute of Blood Transfusion, Chinese Academy of Medical Sciences, Chengdu, Sichuan, China
| | - Jingxing Wang
- Institute of Blood Transfusion, Chinese Academy of Medical Sciences, Chengdu, Sichuan, China
| | - Limin Chen
- Institute of Blood Transfusion, Chinese Academy of Medical Sciences, Chengdu, Sichuan, China
| | - Jing Liu
- Department of Pathology, Johns Hopkins University, Baltimore, MD, USA
| | - Peibin Zeng
- West China School of Public Health, Sichuan University, Chengdu, Sichuan, China.
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Spatial Analysis of Severe Fever with Thrombocytopenia Syndrome Virus in China Using a Geographically Weighted Logistic Regression Model. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2016; 13:ijerph13111125. [PMID: 27845737 PMCID: PMC5129335 DOI: 10.3390/ijerph13111125] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Revised: 10/28/2016] [Accepted: 11/02/2016] [Indexed: 12/23/2022]
Abstract
Severe fever with thrombocytopenia syndrome (SFTS) is caused by severe fever with thrombocytopenia syndrome virus (SFTSV), which has had a serious impact on public health in parts of Asia. There is no specific antiviral drug or vaccine for SFTSV and, therefore, it is important to determine the factors that influence the occurrence of SFTSV infections. This study aimed to explore the spatial associations between SFTSV infections and several potential determinants, and to predict the high-risk areas in mainland China. The analysis was carried out at the level of provinces in mainland China. The potential explanatory variables that were investigated consisted of meteorological factors (average temperature, average monthly precipitation and average relative humidity), the average proportion of rural population and the average proportion of primary industries over three years (2010-2012). We constructed a geographically weighted logistic regression (GWLR) model in order to explore the associations between the selected variables and confirmed cases of SFTSV. The study showed that: (1) meteorological factors have a strong influence on the SFTSV cover; (2) a GWLR model is suitable for exploring SFTSV cover in mainland China; (3) our findings can be used for predicting high-risk areas and highlighting when meteorological factors pose a risk in order to aid in the implementation of public health strategies.
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