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Kempster S, Hassall M, Graham V, Kennedy E, Findlay-Wilson S, Salguero FJ, Bagci B, Elaldi N, Oz M, Tasseten T, Charlton FW, Barr JN, Fontana J, Duru C, Ezeajughi E, Matejtschuk P, Arnold U, Adedeji Y, Mirazimi A, Hewson R, Dowall S, Almond N. Convalescent human plasma candidate reference materials protect against Crimean-Congo haemorrhagic fever virus (CCHFV) challenge in an A129 mouse model. Virus Res 2024; 346:199409. [PMID: 38815869 PMCID: PMC11169527 DOI: 10.1016/j.virusres.2024.199409] [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: 01/10/2024] [Revised: 05/24/2024] [Accepted: 05/27/2024] [Indexed: 06/01/2024]
Abstract
Crimean-Congo Haemorrhagic Fever Virus (CCHFV) is spread by infected ticks or direct contact with blood, tissues and fluids from infected patients or livestock. Infection with CCHFV causes severe haemorrhagic fever in humans which is fatal in up to 83 % of cases. CCHFV is listed as a priority pathogen by the World Health Organization (WHO) and there are currently no widely-approved vaccines. Defining a serological correlate of protection against CCHFV infection would support the development of vaccines by providing a 'target threshold' for pre-clinical and clinical immunogenicity studies to achieve in subjects and potentially obviate the need for in vivo protection studies. We therefore sought to establish titratable protection against CCHFV using pooled human convalescent plasma, in a mouse model. Convalescent plasma collected from seven individuals with a known previous CCHFV virus infection were characterised using binding antibody and neutralisation assays. All plasma recognised nucleoprotein and the Gc glycoprotein, but some had a lower Gn glycoprotein response by ELISA. Pooled plasma and two individual donations from convalescent donors were administered intraperitoneally to A129 mice 24 h prior to intradermal challenge with CCHFV (strain IbAr10200). A partial protective effect was observed with all three convalescent plasmas characterised by longer survival post-challenge and reduced clinical score. These protective responses were titratable. Further characterisation of the serological reactivities within these samples will establish their value as reference materials to support assay harmonisation and accelerate vaccine development for CCHFV.
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Affiliation(s)
- Sarah Kempster
- Science Research and Innovation, Medicines and Healthcare products Regulatory Agency, Blanche Lane, South Mimms, EN6 3QG, UK.
| | - Mark Hassall
- Science Research and Innovation, Medicines and Healthcare products Regulatory Agency, Blanche Lane, South Mimms, EN6 3QG, UK
| | - Victoria Graham
- Virology & Pathogenesis group, UK Health Security Agency, Manor Farm Rd, Porton Down, Salisbury SP4 0JG, UK
| | - Emma Kennedy
- Virology & Pathogenesis group, UK Health Security Agency, Manor Farm Rd, Porton Down, Salisbury SP4 0JG, UK
| | - Stephen Findlay-Wilson
- Virology & Pathogenesis group, UK Health Security Agency, Manor Farm Rd, Porton Down, Salisbury SP4 0JG, UK
| | - Francisco J Salguero
- Virology & Pathogenesis group, UK Health Security Agency, Manor Farm Rd, Porton Down, Salisbury SP4 0JG, UK
| | | | | | - Murtaza Oz
- Sivas Cumhuriyet University, Sivas, Turkey
| | | | - Frank W Charlton
- School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK; Astbury Centre, Astbury Centre for Structural Molecular Biology, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK; Current address: Supramolecular nanomaterials and interfaces laboratory (SuNMIL), École Polytechnique Fédérale de Lausanne, Switzerland
| | - John N Barr
- School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK; Astbury Centre, Astbury Centre for Structural Molecular Biology, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK
| | - Juan Fontana
- School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK; Astbury Centre, Astbury Centre for Structural Molecular Biology, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK
| | - Chinwe Duru
- Science Research and Innovation, Medicines and Healthcare products Regulatory Agency, Blanche Lane, South Mimms, EN6 3QG, UK
| | - Ernest Ezeajughi
- Science Research and Innovation, Medicines and Healthcare products Regulatory Agency, Blanche Lane, South Mimms, EN6 3QG, UK
| | - Paul Matejtschuk
- Science Research and Innovation, Medicines and Healthcare products Regulatory Agency, Blanche Lane, South Mimms, EN6 3QG, UK
| | - Ulrike Arnold
- High Containment Microbiology and Imaging, UKHSA, 61 Colindale Avenue, London, NW9 5EQ, UK
| | - Yemisi Adedeji
- Science Research and Innovation, Medicines and Healthcare products Regulatory Agency, Blanche Lane, South Mimms, EN6 3QG, UK
| | - Ali Mirazimi
- Public Health Agency of Sweden, Solna, Sweden; Division of Clinical Microbiology, Department of Laboratory Medicine, Karolinska Institute, ANA Futura, Campus Flemingsberg, Stockholm, Sweden
| | - Roger Hewson
- Virology & Pathogenesis group, UK Health Security Agency, Manor Farm Rd, Porton Down, Salisbury SP4 0JG, UK; Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London WC1E 7HT, United Kingdom
| | - Stuart Dowall
- Virology & Pathogenesis group, UK Health Security Agency, Manor Farm Rd, Porton Down, Salisbury SP4 0JG, UK
| | - Neil Almond
- Science Research and Innovation, Medicines and Healthcare products Regulatory Agency, Blanche Lane, South Mimms, EN6 3QG, UK
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Okesanya OJ, Olatunji GD, Kokori E, Olaleke NO, Adigun OA, Manirambona E, Lucero-Prisno DE. Looking Beyond the Lens of Crimean-Congo Hemorrhagic Fever in Africa. Emerg Infect Dis 2024; 30:1319-1325. [PMID: 38916548 PMCID: PMC11210649 DOI: 10.3201/eid3007.230810] [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: 06/26/2024] Open
Abstract
Crimean-Congo hemorrhagic fever (CCHF) is a lethal viral disease that has severe public health effects throughout Africa and a case fatality rate of 10%-40%. CCHF virus was first discovered in Crimea in 1944 and has since caused a substantial disease burden in Africa. The shortage of diagnostic tools, ineffective tick control efforts, slow adoption of preventive measures, and cultural hurdles to public education are among the problems associated with continued CCHF virus transmission. Progress in preventing virus spread is also hampered by the dearth of effective serodiagnostic testing for animals and absence of precise surveillance protocols. Intergovernmental coordination, creation of regional reference laboratories, multiinstitutional public education partnerships, investments in healthcare infrastructure, vaccine development, and a One Health approach are strategic methods for solving prevention challenges. Coordinated efforts and financial commitments are needed to combat Crimean-Congo hemorrhagic fever and improve all-around readiness for newly developing infectious illnesses in Africa.
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Cetin S, Sahin AM. Can we predict bleeding at admission in Crimean-Congo hemorrhagic fever? J Infect Chemother 2024:S1341-321X(24)00169-7. [PMID: 38942289 DOI: 10.1016/j.jiac.2024.06.014] [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: 02/22/2024] [Revised: 05/21/2024] [Accepted: 06/21/2024] [Indexed: 06/30/2024]
Abstract
BACKGROUND In Crimean-Congo hemorrhagic fever, bleeding has a significant impact on the prognosis of the disease. In our study, we aimed to identify independent risk factors for the development of bleeding in Crimean-Congo hemorrhagic fever and to contribute to the management of the disease. METHODS Cases with a definitive diagnosis of Crimean-Congo hemorrhagic fever were divided into two groups: those who developed bleeding and those who did not. Demographic, clinical and laboratory parameters were subjected to logistic regression analysis in terms of risk factors for bleeding development. Cut-off values for numerical variables were determined by receiver operating characteristics. RESULTS A total of 74 patients diagnosed with CCHF were included in the study. Bleeding occurred in at least one defined focus in 21 patients. In the multivariate logistic regression model, procalcitonin, days from symptom onset to admission, platelet count, and d-dimer were identified as independent risk factors for bleeding development. Procalcitonin had the most significant effect, with an approximately 5.3-fold increase in bleeding risk for each unit increase in its level. For discriminate bleeding, LDH and ferritin exhibited the highest sensitivity, while procalcitonin showed the highest specificity. CONCLUSION This study demonstrates the potential use of specific clinical and laboratory variables to predict bleeding development in CCHF patients. Procalcitonin elevation and the time from symptom onset to hospital admission have a significant effect in predicting bleeding.
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Affiliation(s)
- Sinan Cetin
- Giresun University, Department of Infectious Diseases and Clinical Microbiology, Giresun, Turkey.
| | - Ahmet Melih Sahin
- Giresun University, Department of Infectious Diseases and Clinical Microbiology, Giresun, Turkey
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Manjunathachar HV, Raut CG, Tiwari P, Chouksey V, Barde PV, Yadav PD, Sharma RK, Das A. Crimean-Congo hemorrhagic fever virus prevalence in livestock of Jabalpur, Madhya Pradesh, Central India and its implications for public health. Res Vet Sci 2024; 171:105243. [PMID: 38564980 DOI: 10.1016/j.rvsc.2024.105243] [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: 12/28/2023] [Revised: 03/21/2024] [Accepted: 03/24/2024] [Indexed: 04/04/2024]
Abstract
The rise of Crimean-Congo Hemorrhagic Fever (CCHF), poses a significant global health challenge, urging immediate action and continuous surveillance. With no available vaccines, monitoring pathogen presence is critical to identify at-risk areas promptly. A study was designed to assess the incidence of CCHF virus in goats and cattle using commercial ELISA IgG kits in tribal-dominated regions. Overall, 16% of the samples (n = 63/393) were positive for CCHF virus-specific IgG antibodies, whereas sero-prevalence detected in cattle 11.6% [95% CI:7-17.7] and in goats 18.9% [95% CI: 13.76-24.01], respectively. Statistically, Animal gender and age didn't significantly affect prevalence (p-value >0.05). Our finding indicates unnoticed CCHF virus circulation. Notably, lack of public awareness about zoonotic diseases in the study region was recorded. To combat this emerging tick-borne disease effectively, it's crucial to screen individuals with hemorrhagic manifestations in healthcare settings and active surveillance of ticks to prevent unwarranted public health outbreaks and design preventive interventions.
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Affiliation(s)
- Haranahally Vasanthachar Manjunathachar
- Division of In-vivo Research, ICMR- National Institute of Research in Tribal Health (NIRTH), Jabalpur- 482003, Madhya Pradesh, India; ICMR-National Institute of Traditional Medicine, Belagavi, Karnataka 590010, India.
| | - Chandrashekar Ganapat Raut
- Division of In-vivo Research, ICMR- National Institute of Research in Tribal Health (NIRTH), Jabalpur- 482003, Madhya Pradesh, India
| | - Prakash Tiwari
- Division of In-vivo Research, ICMR- National Institute of Research in Tribal Health (NIRTH), Jabalpur- 482003, Madhya Pradesh, India
| | - Vivek Chouksey
- Division of In-vivo Research, ICMR- National Institute of Research in Tribal Health (NIRTH), Jabalpur- 482003, Madhya Pradesh, India
| | - Pradip Vijay Barde
- ICMR- National Institute of Virology (Central Zone), Jabalpur- 482003, Madhya Pradesh, India
| | - Pragya D Yadav
- Maximum Containment Laboratory, ICMR-National Institute of Virology, Pune, Maharashtra-411021, India
| | | | - Aparup Das
- Division of Vector borne diseases, ICMR- National Institute of Research in Tribal Health (NIRTH), Jabalpur-482003, Madhya Pradesh, India
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Frank MG, Weaver G, Raabe V. Crimean-Congo Hemorrhagic Fever Virus for Clinicians-Epidemiology, Clinical Manifestations, and Prevention. Emerg Infect Dis 2024; 30:854-863. [PMID: 38666548 PMCID: PMC11060446 DOI: 10.3201/eid3005.231647] [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: 04/30/2024] Open
Abstract
Crimean-Congo hemorrhagic fever (CCHF) is a tickborne infection that can range from asymptomatic to fatal and has been described in >30 countries. Early identification and isolation of patients with suspected or confirmed CCHF and the use of appropriate prevention and control measures are essential for preventing human-to-human transmission. Here, we provide an overview of the epidemiology, clinical features, and prevention and control of CCHF. CCHF poses a continued public health threat given its wide geographic distribution, potential to spread to new regions, propensity for genetic variability, and potential for severe and fatal illness, in addition to the limited medical countermeasures for prophylaxis and treatment. A high index of suspicion, comprehensive travel and epidemiologic history, and clinical evaluation are essential for prompt diagnosis. Infection control measures can be effective in reducing the risk for transmission but require correct and consistent application.
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Rondeau NC, Spector SN, Thannickal SA, Stapleford KA. La Crosse virus reassortants highlight genomic determinants of infection and pathogenesis. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.03.11.584386. [PMID: 38559198 PMCID: PMC10979930 DOI: 10.1101/2024.03.11.584386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
The genomic determinants that contribute to orthobunyavirus infection and pathogenesis are not well-defined. In this study, we harnessed the process of reassortment to understand which viral factors drive change in the replication and pathogenesis of La Crosse virus (LACV). We systematically reassorted the genomic segments of two genetically similar Lineage I LACV isolates into six unique reassortants. Despite the parental isolates having high levels of RNA and protein consensus, the reassortants demonstrate how minimal changes in RNA and protein structure can have significant changes in viral growth and reproduction in vitro in mammalian and insect models. We observed that swapping the S segment between isolates led to differences in replication and assembly resulting in one non-rescuable reassortant and one viable reassortant that exhibited an increase in viral growth dynamics. Switching the M segment led to changes in viral plaque phenotype and growth kinetics. L segment reassortants similarly differed in changes in viral growth dynamics. We further explored the M segment reassortants in a neonate mouse model and observed a role for the M segment in neuroinflammation and virulence. Through reassortment of the La Crosse virus genomic segments, we are able to further understand how genomic determinants of infection and pathogenesis operate in orthobunyaviruses. Future investigations will focus on identifying the specific molecular elements that govern the observed phenotypes in vitro and in vivo . Importance La Crosse virus is the leading cause of pediatric arboviral encephalitis in the United States, yet it is largely unknown how each of the three genomic segments contribute to pathogenesis and disease. Our study utilizes genomic reassortment between two similar Lineage I LACV isolates to understand genomic determinants for differences in infection and pathogenesis phenotypes in vitro and in vivo. By identifying roles for each segment in observed outcomes, we are able to plan further studies for molecular characterization of these phenotypes. Additionally, it is imperative to continue to characterize orthobunyavirus function since climate change will expand the range and prevalence of arthropod-borne diseases such as LACV in the United States.
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Chen T, Ding Z, Li X, Li Y, Lan J, Wong G. A mRNA Vaccine for Crimean-Congo Hemorrhagic Fever Virus Expressing Non-Fusion GnGc Using NSm Linker Elicits Unexpected Immune Responses in Mice. Viruses 2024; 16:378. [PMID: 38543744 PMCID: PMC10975845 DOI: 10.3390/v16030378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 02/03/2024] [Accepted: 02/06/2024] [Indexed: 05/23/2024] Open
Abstract
Crimean-Congo hemorrhagic fever (CCHF), caused by Crimean-Congo Hemorrhagic virus (CCHFV), is listed in the World Health Organization's list of priority diseases. The high fatality rate in humans, the widespread distribution of CCHFV, and the lack of approved specific vaccines are the primary concerns regarding this disease. We used microfluidic technology to optimize the mRNA vaccine delivery system and demonstrated that vaccination with nucleoside-modified CCHFV mRNA vaccines encoding GnNSmGc (vLMs), Gn (vLMn), or Gc (vLMc) induced different immune responses. We found that both T-cell and B-cell immune responses induced by vLMc were better than those induced by vLMn. Interestingly, immune responses were found to be lower for vLMs, which employed NSm to link Gn and Gc for non-fusion expression, compared to those for vLMc. In conclusion, our results indicated that NSm could be a factor that leads to decreased specific immune responses in the host and should be avoided in the development of CCHFV vaccine antigens.
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Affiliation(s)
- Tong Chen
- Viral Hemorrhagic Fever Research Unit, Chinese Academy of Sciences (CAS) Key Laboratory of Molecular Virology & Immunology, Shanghai Institute of Immunity and Infection (Formerly Institut Pasteur of Shanghai), Chinese Academy of Sciences, Shanghai 200031, China (X.L.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhe Ding
- Viral Hemorrhagic Fever Research Unit, Chinese Academy of Sciences (CAS) Key Laboratory of Molecular Virology & Immunology, Shanghai Institute of Immunity and Infection (Formerly Institut Pasteur of Shanghai), Chinese Academy of Sciences, Shanghai 200031, China (X.L.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xuejie Li
- Viral Hemorrhagic Fever Research Unit, Chinese Academy of Sciences (CAS) Key Laboratory of Molecular Virology & Immunology, Shanghai Institute of Immunity and Infection (Formerly Institut Pasteur of Shanghai), Chinese Academy of Sciences, Shanghai 200031, China (X.L.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yingwen Li
- Viral Hemorrhagic Fever Research Unit, Chinese Academy of Sciences (CAS) Key Laboratory of Molecular Virology & Immunology, Shanghai Institute of Immunity and Infection (Formerly Institut Pasteur of Shanghai), Chinese Academy of Sciences, Shanghai 200031, China (X.L.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jiaming Lan
- Viral Hemorrhagic Fever Research Unit, Chinese Academy of Sciences (CAS) Key Laboratory of Molecular Virology & Immunology, Shanghai Institute of Immunity and Infection (Formerly Institut Pasteur of Shanghai), Chinese Academy of Sciences, Shanghai 200031, China (X.L.)
| | - Gary Wong
- Viral Hemorrhagic Fever Research Unit, Chinese Academy of Sciences (CAS) Key Laboratory of Molecular Virology & Immunology, Shanghai Institute of Immunity and Infection (Formerly Institut Pasteur of Shanghai), Chinese Academy of Sciences, Shanghai 200031, China (X.L.)
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Nepveu-Traversy ME, Fausther-Bovendo H, Babuadze G(G. Human Tick-Borne Diseases and Advances in Anti-Tick Vaccine Approaches: A Comprehensive Review. Vaccines (Basel) 2024; 12:141. [PMID: 38400125 PMCID: PMC10891567 DOI: 10.3390/vaccines12020141] [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: 12/25/2023] [Revised: 01/18/2024] [Accepted: 01/23/2024] [Indexed: 02/25/2024] Open
Abstract
This comprehensive review explores the field of anti-tick vaccines, addressing their significance in combating tick-borne diseases of public health concern. The main objectives are to provide a brief epidemiology of diseases affecting humans and a thorough understanding of tick biology, traditional tick control methods, the development and mechanisms of anti-tick vaccines, their efficacy in field applications, associated challenges, and future prospects. Tick-borne diseases (TBDs) pose a significant and escalating threat to global health and the livestock industries due to the widespread distribution of ticks and the multitude of pathogens they transmit. Traditional tick control methods, such as acaricides and repellents, have limitations, including environmental concerns and the emergence of tick resistance. Anti-tick vaccines offer a promising alternative by targeting specific tick proteins crucial for feeding and pathogen transmission. Developing vaccines with antigens based on these essential proteins is likely to disrupt these processes. Indeed, anti-tick vaccines have shown efficacy in laboratory and field trials successfully implemented in livestock, reducing the prevalence of TBDs. However, some challenges still remain, including vaccine efficacy on different hosts, polymorphisms in ticks of the same species, and the economic considerations of adopting large-scale vaccine strategies. Emerging technologies and approaches hold promise for improving anti-tick vaccine development and expanding their impact on public health and agriculture.
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Affiliation(s)
| | - Hugues Fausther-Bovendo
- Department of Microbiology & Immunology, University of Texas Medical Branch, Galveston, TX 75550, USA;
| | - George (Giorgi) Babuadze
- Department of Microbiology & Immunology, University of Texas Medical Branch, Galveston, TX 75550, USA;
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Milano A, Robbiati C, Declich S, Calistri P, Pediconi O, Amato L, Paronyan L, Avetisyan L, Manucharyan A, Avetisyan G, Yesayan T, Gevorgyan A, Markosyan T, Dente MG. Assessing the Adoption of One Health Approaches in National Plans to Combat Health Threats: The Pilot of a One Health Conceptual Framework in Armenia. Trop Med Infect Dis 2024; 9:22. [PMID: 38251220 PMCID: PMC10819525 DOI: 10.3390/tropicalmed9010022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 01/08/2024] [Accepted: 01/10/2024] [Indexed: 01/23/2024] Open
Abstract
Due to several factors, such as environmental and climate changes, the risk of health threats originating at the human-animal-environment interface, including vector-borne diseases (VBDs) and zoonoses, is increasing. Low-resource settings struggle to counter these multidimensional risks due to their already-strained health systems and are therefore disproportionally affected by the impact caused by these changes. Systemic approaches like One Health (OH) are sought to strengthen prevention and preparedness strategies by addressing the drivers of potential threats with a multidisciplinary and multisectoral approach, considering the whole system at the human-animal-environment interface. The integration of OH in national plans can be challenging due to the lack of effective coordination and collaboration among different sectors. To support the process of knowledge coproduction about the level of OH integration in prevention and preparedness strategies against health threats in Armenia, a situation analysis was performed on Crimean-Congo hemorrhagic fever/virus and anthrax (identified by local stakeholders as priorities to be addressed with the OH approach), and actions to strengthen the national OH system were identified with the support of a OH conceptual framework. The study highlighted that multidisciplinary and multisectoral efforts towards prevention and preparedness against VBDs and zoonoses threats need to be strengthened in Armenia, and priority actions to integrate the OH approach were identified.
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Affiliation(s)
- Alessia Milano
- National Center for Global Health, Italian National Institute of Health (Istituto Superiore di Sanità), 00161 Rome, Italy
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, 00185 Rome, Italy
| | - Claudia Robbiati
- National Center for Global Health, Italian National Institute of Health (Istituto Superiore di Sanità), 00161 Rome, Italy
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, 00185 Rome, Italy
| | - Silvia Declich
- National Center for Global Health, Italian National Institute of Health (Istituto Superiore di Sanità), 00161 Rome, Italy
| | - Paolo Calistri
- National Reference Centre for Veterinary Epidemiology, Programming, Information and Risk Analysis (COVEPI), Istituto Zooprofilattico Sperimentale dell’Abruzzo e del Molise ‘G. Caporale’, 64100 Teramo, Italy
| | - Ombretta Pediconi
- Training and Project Management Unit, Istituto Zooprofilattico Sperimentale dell’Abruzzo e del Molise ‘G. Caporale’, 64100 Teramo, Italy
| | - Laura Amato
- National Reference Centre for Veterinary Epidemiology, Programming, Information and Risk Analysis (COVEPI), Istituto Zooprofilattico Sperimentale dell’Abruzzo e del Molise ‘G. Caporale’, 64100 Teramo, Italy
| | - Lusine Paronyan
- Zoonotic and Parasitic Diseases Epidemiology Department, National Center for Disease Control and Prevention, Yerevan 0096, Armenia
| | - Lilit Avetisyan
- National Center for Disease Control and Prevention, Yerevan 0096, Armenia
| | - Arsen Manucharyan
- Reference Laboratory Center Reference Laboratory of Episootology, Ectoparasitology and Entomology, National Center for Disease Control and Prevention, Yerevan 0096, Armenia
| | - Georgi Avetisyan
- Veterinary Inspectorate, Food Safety Inspection Body, MoE, Yerevan 0010, Armenia
| | - Tigran Yesayan
- Veterinary Inspectorate, Food Safety Inspection Body, MoE, Yerevan 0010, Armenia
| | - Arman Gevorgyan
- Veterinary Inspectorate, Food Safety Inspection Body, MoE, Yerevan 0010, Armenia
| | | | - Maria Grazia Dente
- National Center for Global Health, Italian National Institute of Health (Istituto Superiore di Sanità), 00161 Rome, Italy
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10
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Paquette SJ, Simon AY, XIII A, Kobinger GP, Shahhosseini N. Medically Significant Vector-Borne Viral Diseases in Iran. Microorganisms 2023; 11:3006. [PMID: 38138150 PMCID: PMC10745727 DOI: 10.3390/microorganisms11123006] [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: 11/10/2023] [Revised: 12/06/2023] [Accepted: 12/13/2023] [Indexed: 12/24/2023] Open
Abstract
Vector-borne viral diseases (VBVDs) continue to pose a considerable public health risk to animals and humans globally. Vectors have integral roles in autochthonous circulation and dissemination of VBVDs worldwide. The interplay of agricultural activities, population expansion, urbanization, host/pathogen evolution, and climate change, all contribute to the continual flux in shaping the epidemiology of VBVDs. In recent decades, VBVDs, once endemic to particular countries, have expanded into new regions such as Iran and its neighbors, increasing the risk of outbreaks and other public health concerns. Both Iran and its neighboring countries are known to host a number of VBVDs that are endemic to these countries or newly circulating. The proximity of Iran to countries hosting regional diseases, along with increased global socioeconomic activities, e.g., international trade and travel, potentially increases the risk for introduction of new VBVDs into Iran. In this review, we examined the epidemiology of numerous VBVDs circulating in Iran, such as Chikungunya virus, Dengue virus, Sindbis virus, West Nile virus, Crimean-Congo hemorrhagic fever virus, Sandfly-borne phleboviruses, and Hantavirus, in relation to their vectors, specifically mosquitoes, ticks, sandflies, and rodents. In addition, we discussed the interplay of factors, e.g., urbanization and climate change on VBVD dissemination patterns and the consequent public health risks in Iran, highlighting the importance of a One Health approach to further surveil and to evolve mitigation strategies.
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Affiliation(s)
- Sarah-Jo Paquette
- Department of Biological Sciences, University of Lethbridge, Lethbridge, AB T1K 3M4, Canada;
| | - Ayo Yila Simon
- Department of Pathology and Laboratory Medicine, Faculty of Medicine, University of British Columbia, Vancouver, BC V6T 1Z4, Canada;
| | - Ara XIII
- Galveston National Laboratory, University of Texas Medical Branch, Galveston, TX 77555, USA; (A.X.); (G.P.K.)
| | - Gary P. Kobinger
- Galveston National Laboratory, University of Texas Medical Branch, Galveston, TX 77555, USA; (A.X.); (G.P.K.)
| | - Nariman Shahhosseini
- Department of Biological Sciences, University of Lethbridge, Lethbridge, AB T1K 3M4, Canada;
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Komut S, Çorakyer N, Kaplan G, Baykam N. An Evaluation of the Hitit Index in Differential Diagnosis of Crimean-Congo Hemorrhagic Fever in the Emergency Department. MEDICINA (KAUNAS, LITHUANIA) 2023; 59:1796. [PMID: 37893514 PMCID: PMC10608086 DOI: 10.3390/medicina59101796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 09/25/2023] [Accepted: 09/28/2023] [Indexed: 10/29/2023]
Abstract
Background and Objectives: Crimean-Congo Hemorrhagic Fever (CCHF) is a viral zoonotic infection, which is seen over a wide geographic area. The mortality rate is in inverse proportion to the ability of patients to access healthcare services. Therefore, early identification of patients is extremely important. The aim of this study was to test the sensitivity and specificity of the Hitit Index in the differentiation of CCHF cases at the time of presentation at the Emergency Department and to evaluate the agreement of this index with molecular (CCHFV RNA) and/or serological diagnostic tests (ELISA-CCHF IgM). Materials and Methods: The patients included were those who presented at the Emergency Department (ED) with the complaint of a tick bite or those identified as potential CCHF cases as a result of complaints and/or laboratory findings. For cases that met the study inclusion criteria, the Hitit Index score was calculated automatically from the parameters included in the index formula uploaded to the automation system in the ED at the time of presentation. Through comparisons of the agreement of the Hitit Index with the CCHFV-RNA and/or IgM results the power of the Hitit Index for differentiation of CCHF cases in ED was evaluated. Results: The data of 273 patients were analyzed. There was a history of tick bite in 236 (86%) cases. Of the evaluated cases, 110 (40.2%) were hospitalized; CCHF positivity was determined in 72 (26.4%). The Hitit Index values calculated in ED and at 24 h after hospitalization were determined to be significant in the prediction of the CCHF cases (p < 0.001, AUC = 0.919 (0.887-0.951); p < 0.001, AUC = 0.902 (0.841-0.962). For a cut-off point of 0 of the Hitit Index evaluated in ED, the classification success was found to have a sensitivity of 75% and specificity of 88% (PPV-NPV). For a cut-off point of 0 of the Hitit Index evaluated at 24 h after hospitalization, the classification success was found to have a sensitivity of 79.7% and specificity of 84% (PPV-NPV). Conclusions: The defined form of the Hitit Index can be used in the differentiation of CCHF cases in ED with high sensitivity and specificity levels. Just as evaluation with the Hitit Index prevents unnecessary hospitalization, it can also contribute to reducing mortality rates with the early identification of CCHF cases.
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Affiliation(s)
- Seval Komut
- Department of Emergency Medicine, Faculty of Medicine, Hitit University, 19040 Çorum, Turkey;
| | - Nurullah Çorakyer
- Department of Emergency Medicine, Faculty of Medicine, Hitit University, 19040 Çorum, Turkey;
| | - Gülcan Kaplan
- Department of Infectious Diseases and Clinical Microbiology, Faculty of Medicine, Hitit University, 19040 Çorum, Turkey; (G.K.); (N.B.)
| | - Nurcan Baykam
- Department of Infectious Diseases and Clinical Microbiology, Faculty of Medicine, Hitit University, 19040 Çorum, Turkey; (G.K.); (N.B.)
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12
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Ahrabi SZ, Akyildiz G, Kar S, Keles AG. Detection of the Crimean-Congo Hemorrhagic Fever Virus Genome in Questing Ixodes spp. and Haemaphysalis spp. in the Periurban Forestry Areas of Istanbul: Has a New Biorisk Emerged? Vector Borne Zoonotic Dis 2023; 23:528-536. [PMID: 37527191 DOI: 10.1089/vbz.2023.0023] [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: 08/03/2023] Open
Abstract
Background: Istanbul is one of the world's most densely populated metropolitan cities, with various geographical areas that possess distinct characteristics. These areas have different climates, vegetation, and host populations that can support the survival of diverse tick species. Turkey is a region with a high risk of Crimean-Congo hemorrhagic fever (CCHF) disease, making it crucial to screen for this risk, especially in densely populated regions such as Istanbul and its surrounding areas. However, the presence of potential vectors for CCHF virus (CCHFV) in these areas has not been studied in the past 12 years. Materials and Methods: In this study, a total of 676 ticks were collected from 6 centers using the flagging and dragging method. Ticks were identified as Ixodes ricinus (7.85%), Ixodes spp. immature form (73.22%), Haemaphysalis parva (0.89%), Haemaphysalis inermis (0.15%), and Haemaphysalis spp. immature form (17.89%). Pooled samples were screened for the CCHFV genome (S segment) by RT-nested PCR. Results: A total of 14.28% of the samples were found as positive. Phylogenetic analysis revealed that all the CCHFV sequences obtained from the positive samples were clustered in clade V: Europe/Turkey genogroup. Conclusion: This study suggests that ixodes spp. and Haemaphysalis spp. may have the potential to pose a biorisk for Crimean-Congo hemorrhagic fever.
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Affiliation(s)
- Salar Zarrabi Ahrabi
- Department of Basic Health Science, Health Sciences Faculty, Marmara University, Istanbul, Turkey
| | - Gurkan Akyildiz
- Department of Basic Health Science, Health Sciences Faculty, Marmara University, Istanbul, Turkey
| | - Sirri Kar
- Department of Biology, Faculty of Arts and Science, Tekirdag Namik Kemal University, Tekirdag, Turkey
| | - Aysen Gargili Keles
- Department of Basic Health Science, Health Sciences Faculty, Marmara University, Istanbul, Turkey
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13
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Riccò M, Baldassarre A, Corrado S, Bottazzoli M, Marchesi F. Seroprevalence of Crimean Congo Hemorrhagic Fever Virus in Occupational Settings: Systematic Review and Meta-Analysis. Trop Med Infect Dis 2023; 8:452. [PMID: 37755913 PMCID: PMC10538165 DOI: 10.3390/tropicalmed8090452] [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: 07/31/2023] [Revised: 09/11/2023] [Accepted: 09/17/2023] [Indexed: 09/28/2023] Open
Abstract
Crimean Congo Hemorrhagic Fever (CCHF) Virus can cause a serious human disease, with the case fatality ratio previously estimated to be 30-40%. Our study summarized seroprevalence data from occupational settings, focusing on the following occupational groups: animal handlers, abattoir workers, farmers, healthcare workers, veterinarians, rangers, and hunters. Systematic research was performed on three databases (PubMed, EMBASE, MedRxiv), and all studies reporting seroprevalence rates (IgG-positive status) for CCHF virus were retrieved and their results were reported, summarized, and compared. We identified a total of 33 articles, including a total of 20,195 samples, i.e., 13,197 workers from index occupational groups and 6998 individuals from the general population. Pooled seroprevalence rates ranged from 4.751% (95% confidence intervals (95% CI) 1.834 to 11.702) among animal handlers, to 3.403% (95% CI 2.44 to 3.932) for farmers, 2.737% (95% CI 0.896 to 8.054) among rangers and hunters, 1.900% (95% CI 0.738 to 4.808) for abattoir workers, and 0.644% (95% CI 0.223-1.849) for healthcare workers, with the lowest estimate found in veterinarians (0.283%, 95% CI 0.040-1.977). Seroprevalence rates for abattoir workers (odds ratio (OR) 4.198, 95% CI 1.060-16.464), animal handlers (OR 2.399, 95% CI 1.318-4.369), and farmers (OR 2.280, 95% CI 1.419 to 3.662) largely exceeded the official notification rates for CCHF in the general population. CCHF is reasonably underreported, and pooled estimates stress the importance of improving the adherence to personal protective equipment use and appropriate preventive habits.
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Affiliation(s)
- Matteo Riccò
- AUSL–IRCCS di Reggio Emilia, Servizio di Prevenzione e Sicurezza Negli Ambienti di Lavoro (SPSAL), Local Health Unit of Reggio Emilia, 42122 Reggio Emilia, Italy
| | - Antonio Baldassarre
- Department of Experimental and Clinical Medicine, University of Florence, 50134 Florence, Italy;
| | - Silvia Corrado
- ASST Rhodense, Dipartimento della donna e Area Materno-Infantile, UOC Pediatria, 20024 Garbagnate Milanese, Italy;
| | - Marco Bottazzoli
- Department of Otorhinolaryngology, APSS Trento, 38122 Trento, Italy;
| | - Federico Marchesi
- Department of Medicine and Surgery, University of Parma, 43126 Parma, Italy;
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14
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Guterres A. Viral load: We need a new look at an old problem? J Med Virol 2023; 95:e29061. [PMID: 37638475 DOI: 10.1002/jmv.29061] [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: 01/27/2023] [Revised: 07/22/2023] [Accepted: 08/17/2023] [Indexed: 08/29/2023]
Abstract
The concept of viral load was introduced in the 1980s to measure the amount of viral genetic material in a person's blood, primarily for human immunodeficiency virus (HIV). It has since become crucial for monitoring HIV infection progression and assessing the efficacy of antiretroviral therapy. However, during the coronavirus disease 2019 pandemic, the term "viral load" became widely popularized, not only for the scientific community but for the general population. Viral load plays a critical role in both clinical patient management and research, providing valuable insights for antiviral treatment strategies, vaccination efforts, and epidemiological control measures. As measuring viral load is so important, why don't researchers discuss the best way to do it? Is it simply acceptable to use raw Ct values? Relying solely on Ct values for viral load estimation can be problematic due to several reasons. First, Ct values can vary between different quantitative polymerase chain reaction assays, platforms, and laboratories, making it difficult to compare data across studies. Second, Ct values do not directly measure the quantity of viral particles in a sample and they can be influenced by various factors such as initial viral load, sample quality, and assay sensitivity. Moreover, variations in viral RNA extraction and reverse-transcription steps can further impact the accuracy of viral load estimation, emphasizing the need for careful interpretation of Ct values in viral load assessment. Interestingly, we did not observe scientific articles addressing different strategies to quantify viral load. The absence of standardized and validated methods impedes the implementation of viral load monitoring in clinical management. The variability in cell quantities within samples and the variation in viral particle numbers within infected cells further challenge accurate viral load measurement and interpretation. To advance the field and improve patient outcomes, there is an urgent need for the development and validation of tailored, standardized methods for precise viral load quantification.
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Affiliation(s)
- Alexandro Guterres
- Laboratório de Hantaviroses e Rickettsioses, Instituto Oswaldo Cruz Fundação Oswaldo Cruz (FIOCRUZ), Rio de Janeiro, Brazil
- Laboratório de Tecnologia Imunológica, Instituto de Tecnologia em Imunobiológicos, Vice-Diretoria de Desenvolvimento Tecnológico, Bio-Manguinhos, Fundação Oswaldo Cruz (FIOCRUZ), Rio de Janeiro, Brazil
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15
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Kerget F, Kerget B. Can Fractional Exhaled Nitric Oxide (FeNO) Serve as a Clinical Indicator for Patients Hospitalized with Crimean-Congo Hemorrhagic Fever? Jpn J Infect Dis 2023; 76:226-232. [PMID: 37005275 DOI: 10.7883/yoken.jjid.2022.470] [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: 04/03/2023]
Abstract
Crimean-Congo hemorrhagic fever (CCHF), a zoonotic disease spread by infected viruses, can be a significant cause of morbidity and mortality in endemic areas. This prospective study aimed to establish the relationship between fractional exhaled nitric oxide (FeNO) levels and clinical prognosis of CCHF. The study included 85 participants: 55 patients followed up for CCHF from May to August 2022, and 30 healthy controls. FeNO levels were measured upon hospital admission and were 7.6 ± 3.3 parts per billion (ppb) in patients with mild/moderate CCHF, 2.5 ± 2.1 ppb in patients with severe CCHF, and 6.7 ± 1.7 ppb in the healthy control group. There was no statistically significant difference in FeNO levels between the control group and patients with mild/moderate CCHF (P = 0.09), whereas patients with severe CCHF had lower FeNO levels than those in the control group and patients with mild/moderate CCHF (P < 0.001 for both). FeNO measurement may offer a noninvasive and easily applied approach for predicting the clinical course and prognosis of CCHF in the early stages of the disease.
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Affiliation(s)
- Ferhan Kerget
- Department of Infectious Diseases and Clinical Microbiology, Erzurum Regional Training and Research Hospital, University of Health Sciences, Turkey
| | - Buğra Kerget
- Department of Pulmonary Diseases, Faculty of Medicine, Ataturk University, Turkey
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16
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Rasikh AS, Aram MM, Noory AT. Clinical and Epidemiological Characteristics of 30 Fatal Cases of Crimean-Congo Hemorrhagic Fever in Kabul, Afghanistan: A Retrospective Observational Study. Infect Drug Resist 2023; 16:3469-3476. [PMID: 37287545 PMCID: PMC10243361 DOI: 10.2147/idr.s410955] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2023] [Accepted: 05/30/2023] [Indexed: 06/09/2023] Open
Abstract
Objective Crimean-Congo hemorrhagic fever (CCHF) is a zoonotic disease associated with a high fatality rate. CCHF is endemic in Afghanistan, and its morbidity and mortality have increased recently but there is limited data about the characteristics of fatal cases. We aimed to report the clinical and epidemiological features of fatal CCHF cases who were admitted to Kabul Referral Infectious Diseases (Antani) Hospital. Methods This is a retrospective cross-sectional study. The demographic and presenting clinical and laboratory features of 30 fatal CCHF cases diagnosed by reverse transcription polymerase chain reaction (RT-PCR) or enzyme-linked immunosorbent assay (ELISA) tests were collected from the patients' records between March 2021 and March 2023. Results During the study period, a total of 118 laboratory-confirmed CCHF patients were admitted to Kabul Antani Hospital of whom 30 patients (25 males, 5 females) consequently died, indicating a 25.4% case fatality rate (CFR). The age of the fatal cases ranged from 15 to 62 years and their mean age was 36.6 ± 11.7 years. Concerning occupation, the patients were butchers (23.3%), animal dealers (20%), shepherds (16.6%), housewives (16.6%), farmers (10%), student (3.3%), and others (10%). The clinical symptoms of the patients on admission were fever (100%), generalized body pain (100%), fatigue (90%), bleeding (any type) (86.6%), headache (80%), nausea/vomiting (73.3%), and diarrhea (70%). The initial abnormal laboratory findings were leukopenia (80%), leukocytosis (6.6%), anemia (73.3%), and thrombocytopenia (100%), raised hepatic enzymes (ALT & AST) (96.6%) and prolonged prothrombin time/international normalized ratio (PT/INR) (100%). Conclusion The hemorrhagic manifestations associated with low platelet and raised PT/INR levels are linked with fatal outcomes. A high index of clinical suspicion is required to recognize the disease at an early stage and to begin the treatment promptly for reducing mortality.
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Affiliation(s)
- Ahmad Shekaib Rasikh
- Department of Infectious Diseases, Ali Abad Teaching Hospital, Kabul University of Medical Sciences, Kabul, Afghanistan
| | - Mohammad Maroof Aram
- Department of Internal Medicine, Ali Abad Teaching Hospital, Kabul University of Medical Sciences, Kabul, Afghanistan
| | - Abdul Tawab Noory
- Department of Infectious Diseases, Ali Abad Teaching Hospital, Kabul University of Medical Sciences, Kabul, Afghanistan
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17
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Weidinger P, Kolodziejek J, Loney T, Kannan DO, Osman BM, Khafaga T, Howarth B, Sher Shah M, Mazrooei H, Wolf N, Karuvantevida N, Abou Tayoun A, Alsheikh-Ali A, Camp JV, Nowotny N. MERS-CoV Found in Hyalomma dromedarii Ticks Attached to Dromedary Camels at a Livestock Market, United Arab Emirates, 2019. Viruses 2023; 15:1288. [PMID: 37376588 DOI: 10.3390/v15061288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 05/23/2023] [Accepted: 05/29/2023] [Indexed: 06/29/2023] Open
Abstract
The main mode of transmission of Middle East respiratory syndrome-related coronavirus (MERS-CoV) between dromedaries is likely via the respiratory route. However, there must be other modes to explain how the infection is brought to MERS-CoV-negative closed herds, such as transmission by ticks. Here, we present a study performed at three different locations in the United Arab Emirates (UAE) involving 215 dromedary camels (Camelus dromedarius) and the ticks attached to them. We tested the camels and ticks via RT-(q)PCR for the presence of MERS-CoV nucleic acids, as well as flaviviruses that may be present in the region (e.g., Alkhumra hemorrhagic fever virus). Camel sera were additionally analyzed for evidence of previous exposure to MERS-CoV. In total, 8 out of 242 tick pools were positive for MERS-CoV RNA (3.3%; Ct 34.6-38.3), 7 of which contained Hyalomma dromedarii ticks, and one contained a Hyalomma sp. tick (species not identified). All of the virus-positive ticks' host camels were also positive for MERS-CoV RNA in their nasal swab samples. Short sequences established in the N gene region from two positive tick pools were identical to viral sequences from their hosts' nasal swabs. In total, 59.3% of dromedaries at the livestock market had MERS-CoV RNA in their nasal swabs (Ct 17.7-39.5). While dromedaries at all locations were negative for MERS-CoV RNA in their serum samples, antibodies were detected in 95.2% and 98.7% of them (tested by ELISA and indirect immunofluorescence test, respectively). Given the probably transient and/or low level of MERS-CoV viremia in dromedaries and the rather high Ct values observed in the ticks, it seems unlikely that Hyalomma dromedarii is a competent vector for MERS-CoV; however, its role in mechanical or fomite transmission between camels should be investigated.
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Affiliation(s)
- Pia Weidinger
- Viral Zoonoses, Emerging and Vector-Borne Infections Group, Institute of Virology, University of Veterinary Medicine Vienna, 1210 Vienna, Austria
| | - Jolanta Kolodziejek
- Viral Zoonoses, Emerging and Vector-Borne Infections Group, Institute of Virology, University of Veterinary Medicine Vienna, 1210 Vienna, Austria
| | - Tom Loney
- College of Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai P.O. Box 505055, United Arab Emirates
| | - Dafalla O Kannan
- Al Ain City Municipality, Al Ain P.O. Box 1003, United Arab Emirates
| | | | - Tamer Khafaga
- Dubai Desert Conservation Reserve, Emirates Group, Dubai P.O. Box 686, United Arab Emirates
| | - Brigitte Howarth
- Natural History Museum Abu Dhabi (NHMAD), Department of Culture and Tourism, Abu Dhabi P.O. Box 94000, United Arab Emirates
| | - Moayyed Sher Shah
- Dubai Desert Conservation Reserve, Emirates Group, Dubai P.O. Box 686, United Arab Emirates
| | - Hessa Mazrooei
- College of Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai P.O. Box 505055, United Arab Emirates
| | - Nadine Wolf
- Viral Zoonoses, Emerging and Vector-Borne Infections Group, Institute of Virology, University of Veterinary Medicine Vienna, 1210 Vienna, Austria
| | - Noushad Karuvantevida
- College of Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai P.O. Box 505055, United Arab Emirates
| | - Ahmad Abou Tayoun
- Al Jalila Genomics Center of Excellence, Al Jalila Children's Specialty Hospital, Dubai P.O. Box 7662, United Arab Emirates
- Center for Genomic Discovery, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai P.O. Box 505055, United Arab Emirates
| | - Alawi Alsheikh-Ali
- College of Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai P.O. Box 505055, United Arab Emirates
| | - Jeremy V Camp
- Center for Virology, Medical University of Vienna, 1090 Vienna, Austria
| | - Norbert Nowotny
- Viral Zoonoses, Emerging and Vector-Borne Infections Group, Institute of Virology, University of Veterinary Medicine Vienna, 1210 Vienna, Austria
- College of Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai P.O. Box 505055, United Arab Emirates
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Febrer-Sendra B, Fernández-Soto P, García-Bernalt Diego J, Crego-Vicente B, Negredo A, Muñor-Bellido JL, Belhassen-García M, Sánchez-Seco MP, Muro A. A Novel RT-LAMP for the Detection of Different Genotypes of Crimean–Congo Haemorrhagic Fever Virus in Patients from Spain. Int J Mol Sci 2023; 24:ijms24076411. [PMID: 37047384 PMCID: PMC10094476 DOI: 10.3390/ijms24076411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 03/25/2023] [Accepted: 03/27/2023] [Indexed: 03/31/2023] Open
Abstract
Crimean–Congo haemorrhagic fever (CCHF) is a potentially lethal tick-borne viral disease with a wide distribution. In Spain, 12 human cases of CCHF have been confirmed, with four deaths. The diagnosis of CCHF is hampered by the nonspecific symptoms, the high genetic diversity of CCHFV, and the biosafety requirements to manage the virus. RT-qPCR and serological tests are used for diagnosis with limitations. Reverse-transcription loop-mediated isothermal amplification (RT-LAMP) could be an effective alternative in the diagnosis of the disease. However, none of the few RT-LAMP assays developed to date has detected different CCHFV genotypes. Here, we designed a RT-LAMP using a degenerate primer set to compensate for the variability of the CCHFV target sequence. RT-LAMP was performed in colorimetric and real-time tests on RT-qPCR-confirmed CCHF patient samples notified in Spain in 2020 and 2021. Urine from an inpatient was analysed by RT-LAMP for the first time and compared with RT-qPCR. The amplicons obtained by RT-qPCR were sequenced and African III and European V genotypes were identified. RT-LAMP amplified both genotypes and was more sensitive than RT-qPCR in urine samples. We have developed a novel, rapid, specific, and sensitive RT-LAMP test that allows the detection of different CCHFV genotypes in clinical samples. This pan-CCHFV RT-LAMP detected viral RNA for the first time in urine samples. It can be easily performed as a single-tube isothermal colorimetric method on a portable platform in real time and without the need for expensive equipment, thus bringing molecular diagnostics closer to rural or resource-poor areas, where CCHF usually occurs.
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Saunders JE, Gilbride C, Dowall S, Morris S, Ulaszewska M, Spencer AJ, Rayner E, Graham VA, Kennedy E, Thomas K, Hewson R, Gilbert SC, Belij-Rammerstorfer S, Lambe T. Adenoviral vectored vaccination protects against Crimean-Congo Haemorrhagic Fever disease in a lethal challenge model. EBioMedicine 2023; 90:104523. [PMID: 36933409 PMCID: PMC10025009 DOI: 10.1016/j.ebiom.2023.104523] [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: 07/20/2022] [Revised: 02/21/2023] [Accepted: 02/28/2023] [Indexed: 03/18/2023] Open
Abstract
BACKGROUND The tick-borne bunyavirus, Crimean-Congo Haemorrhagic Fever virus (CCHFV), can cause severe febrile illness in humans and has a wide geographic range that continues to expand due to tick migration. Currently, there are no licensed vaccines against CCHFV for widespread usage. METHODS In this study, we describe the preclinical assessment of a chimpanzee adenoviral vectored vaccine (ChAdOx2 CCHF) which encodes the glycoprotein precursor (GPC) from CCHFV. FINDINGS We demonstrate here that vaccination with ChAdOx2 CCHF induces both a humoral and cellular immune response in mice and 100% protection in a lethal CCHF challenge model. Delivery of the adenoviral vaccine in a heterologous vaccine regimen with a Modified Vaccinia Ankara vaccine (MVA CCHF) induces the highest levels of CCHFV-specific cell-mediated and antibody responses in mice. Histopathological examination and viral load analysis of the tissues of ChAdOx2 CCHF immunised mice reveals an absence of both microscopic changes and viral antigen associated with CCHF infection, further demonstrating protection against disease. INTERPRETATION There is the continued need for an effective vaccine against CCHFV to protect humans from lethal haemorrhagic disease. Our findings support further development of the ChAd platform expressing the CCHFV GPC to seek an effective vaccine against CCHFV. FUNDING This research was supported by funding from the Biotechnology and Biological Sciences Research Council (UKRI-BBSRC) [BB/R019991/1 and BB/T008784/1].
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Affiliation(s)
- Jack E Saunders
- The Jenner Institute, Nuffield Department of Medicine, University of Oxford, Oxford, UK; Oxford Vaccine Group, Department of Paediatrics, University of Oxford, Oxford, UK.
| | - Ciaran Gilbride
- The Jenner Institute, Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | - Stuart Dowall
- UK Health Security Agency (UKHSA), Porton Down, Salisbury, Wiltshire, UK
| | - Susan Morris
- The Jenner Institute, Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | - Marta Ulaszewska
- The Jenner Institute, Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | - Alexandra J Spencer
- The Jenner Institute, Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | - Emma Rayner
- UK Health Security Agency (UKHSA), Porton Down, Salisbury, Wiltshire, UK
| | - Victoria A Graham
- UK Health Security Agency (UKHSA), Porton Down, Salisbury, Wiltshire, UK
| | - Emma Kennedy
- UK Health Security Agency (UKHSA), Porton Down, Salisbury, Wiltshire, UK
| | - Kelly Thomas
- UK Health Security Agency (UKHSA), Porton Down, Salisbury, Wiltshire, UK
| | - Roger Hewson
- UK Health Security Agency (UKHSA), Porton Down, Salisbury, Wiltshire, UK
| | - Sarah C Gilbert
- The Jenner Institute, Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | - Sandra Belij-Rammerstorfer
- The Jenner Institute, Nuffield Department of Medicine, University of Oxford, Oxford, UK; Oxford Vaccine Group, Department of Paediatrics, University of Oxford, Oxford, UK.
| | - Teresa Lambe
- Oxford Vaccine Group, Department of Paediatrics, University of Oxford, Oxford, UK; Chinese Academy of Medical Science (CAMS) Oxford Institute, University of Oxford, Oxford, UK
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20
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Co-Immunization Efficacy of Recombinant Antigens against Rhipicephalus microplus and Hyalomma anatolicum Tick Infestations. Pathogens 2023; 12:pathogens12030433. [PMID: 36986356 PMCID: PMC10058648 DOI: 10.3390/pathogens12030433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 03/02/2023] [Accepted: 03/02/2023] [Indexed: 03/12/2023] Open
Abstract
The immunoprophylactic management of ticks is the most effective option to control tick infestations and counter spread the acaricide resistance problem worldwide. Several researchers reported an inconsistent efficacy of the single antigen-based immunization of hosts against different tick species. In the present study, to develop a multi-target immunization protocol, proteins from Rhipicephalus microplus BM86 and Hyalomma anatolicum subolesin (SUB) and tropomyosin (TPM) were targeted to evaluate the cross-protective potential. The sequence identities of the BM86, SUB, and TPM coding genes amongst Indian tick isolates of targeted species were 95.6–99.8%, 98.7–99.6%, and 98.9–99.9%, respectively, while at the predicted amino acid level, the identities were 93.2 to 99.5, 97.6 to 99.4, and 98.2 to 99.3%. The targeted genes were expressed in the eukaryotic expression system, pKLAC2-Kluyveromyces lactis, and 100 µg each of purified recombinant protein (Bm86-89 kDa, SUB-21 kDa, and TPM-36 kDa) mixed with adjuvant was injected individually through the intramuscular route at different sites of the body on days 0, 30, and 60 to immunize cross-bred cattle. Post-immunization, a statistically significant (p < 0.001) antibody response (IgG, IgG1, and IgG2) in comparison to the control, starting from 15 to 140 days, against each antigen was recorded. Following multi-antigen immunization, the animals were challenged twice with the larvae of R. microplus and H. anatolicum and theadults of H. anatolicum, and a significant vaccine efficacy of 87.2% and 86.2% against H. anatolicum larvae and adults, respectively, and 86.7% against R. microplus was obtained. The current study provides significant support to develop a multi-antigen vaccine against cattle tick species.
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Weidinger P, Kolodziejek J, Khafaga T, Loney T, Howarth B, Sher Shah M, Abou Tayoun A, Alsheikh-Ali A, Camp JV, Nowotny N. Potentially Zoonotic Viruses in Wild Rodents, United Arab Emirates, 2019—A Pilot Study. Viruses 2023; 15:v15030695. [PMID: 36992404 PMCID: PMC10054371 DOI: 10.3390/v15030695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Revised: 03/03/2023] [Accepted: 03/05/2023] [Indexed: 03/10/2023] Open
Abstract
The majority of emerging viral infectious diseases in humans originate from wildlife reservoirs, such as rodents and bats. We investigated a possible reservoir, namely wild gerbils and mice trapped in a desert reserve within the emirate of Dubai, United Arab Emirates (UAE). In total, 52 gerbils and 1 jird (Gerbillinae), 10 house mice (Mus musculus), and 1 Arabian spiny mouse (Acomys dimidiatus) were sampled. Oro-pharyngeal swabs, fecal samples, attached ticks, and organ samples (where available) were screened by (RT-q)PCR for the following viruses: Middle East respiratory syndrome-related coronavirus, Crimean-Congo hemorrhagic fever orthonairovirus, Alkhumra hemorrhagic fever virus, hantaviruses, Lymphocytic choriomeningitis mammarenavirus, Rustrela virus, poxviruses, flaviviruses, and herpesviruses. All of the samples were negative for all investigated viruses, except for herpesviruses: 19 gerbils (35.8%) and 7 house mice (70.0%) were positive. The resulting sequences were only partly identical to sequences in GenBank. Phylogenetic analysis revealed three novel betaherpesviruses and four novel gammaherpesviruses. Interestingly, species identification of the positive gerbils resulted in eight individuals clustering in a separate clade, most closely related to Dipodillus campestris, the North African gerbil, indicating either the expansion of the geographic range of this species, or the existence of a closely related, yet undiscovered species in the UAE. In conclusion, we could not find evidence of persistence or shedding of potentially zoonotic viruses in the investigated rodent cohorts of limited sample size.
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Affiliation(s)
- Pia Weidinger
- Viral Zoonoses, Emerging and Vector-Borne Infections Group, Institute of Virology, University of Veterinary Medicine Vienna, 1210 Vienna, Austria
| | - Jolanta Kolodziejek
- Viral Zoonoses, Emerging and Vector-Borne Infections Group, Institute of Virology, University of Veterinary Medicine Vienna, 1210 Vienna, Austria
| | - Tamer Khafaga
- Dubai Desert Conservation Reserve, Emirates Group, Dubai P.O. Box 686, United Arab Emirates
| | - Tom Loney
- College of Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai P.O. Box 505055, United Arab Emirates
| | - Brigitte Howarth
- American University in Dubai, Al Sufouh 2, Dubai P.O. Box 28282, United Arab Emirates
| | - Moayyed Sher Shah
- Dubai Desert Conservation Reserve, Emirates Group, Dubai P.O. Box 686, United Arab Emirates
| | - Ahmad Abou Tayoun
- Al Jalila Genomics Center of Excellence, Al Jalila Children’s Specialty Hospital, Dubai 7662, United Arab Emirates
- Center for Genomic Discovery, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai P.O. Box 505055, United Arab Emirates
| | - Alawi Alsheikh-Ali
- College of Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai P.O. Box 505055, United Arab Emirates
- Dubai Health Authority, Dubai P.O. Box 4545, United Arab Emirates
| | - Jeremy V. Camp
- Center for Virology, Medical University of Vienna, 1090 Vienna, Austria
| | - Norbert Nowotny
- Viral Zoonoses, Emerging and Vector-Borne Infections Group, Institute of Virology, University of Veterinary Medicine Vienna, 1210 Vienna, Austria
- College of Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai P.O. Box 505055, United Arab Emirates
- Correspondence: ; Tel.: +43-1-25077-2704
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Low DH, Ch'ng L, Su YC, Linster M, Zhang R, Yan Z, Kwak ML, Borthwick SA, Hitch A, Smith GJ, Mendenhall IH. Cencurut virus: A novel Orthonairovirus from Asian house shrews (Suncus murinus) in Singapore. One Health 2023. [DOI: 10.1016/j.onehlt.2023.100529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/31/2023] Open
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23
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Potential Mammalian Vector-Borne Diseases in Live and Wet Markets in Indonesia and Myanmar. MICROBIOLOGY RESEARCH 2023. [DOI: 10.3390/microbiolres14010011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Vector-borne diseases spread from wild animals and their associated ectoparasites to humans and domesticated animals. Wildlife markets are recognized as important areas where this transfer can take place. We assessed the potential for spreading vector-borne diseases in two live and wet markets in Myanmar (Mong La, on the Myanmar-China border) and Indonesia (Sukahaji in Bandung on the island of Java) by making an inventory of all live and freshly killed wild mammals for sale. For eight mammal families, we quantified the number of animals on offer, and we used a heatmap cluster analysis to map vector-borne diseases that these families may carry. In Myanmar, we observed large numbers of wild pigs and deer (potentially carrying West Nile and various encephalitis viruses) whereas in Indonesia we observed Old World fruit bats (potentially carrying Chikungunya and encephalitis viruses) and squirrels (potentially carrying West Nile and encephalitis viruses). The trade in Indonesia was dominated by live mammals offered for sale as pets, and only Old World fruit bats and squirrels traded for traditional Asian medicine were killed in the markets. The trade in Myanmar was more geared towards wild meat (e.g., wild pigs, deer, primates) and traditional Asian medicine (squirrels). The combined risks of vector-borne diseases spreading from traded animals to human health highlight the need for an integrated approach protecting public health, economic interests and biodiversity.
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Cosgun Y, Aydemir A, Hedef H, Öz Kamiloglu A, Klemens O, Lattwein E, Klemens JM, Saschenbrecker S, Steinhagen K, Korukluoglu G. Evaluation of Nucleoprotein-Based Enzyme-Linked Immunosorbent Assay for Serodiagnosis of Acute Crimean-Congo Hemorrhagic Fever Virus Infections in a Turkish Population. Vector Borne Zoonotic Dis 2023; 23:44-53. [PMID: 36576857 DOI: 10.1089/vbz.2022.0026] [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: 12/29/2022] Open
Abstract
Background: Crimean-Congo hemorrhagic fever virus (CCHFV) causes a highly contagious tick-borne disease with high case-fatality rates in humans. It is circulating not only in many Asian and African countries, but also spreading to and within Europe. To cope better with future outbreaks of Crimean-Congo hemorrhagic fever (CCHF), the WHO has prioritized the need for the development and validation of CCHF diagnostics, including serological assays. In this study, we evaluated the performance of the new EUROIMMUN anti-CCHFV IgM and IgG enzyme-linked immunosorbent assays (ELISAs). Materials and Methods: Both ELISAs were compared to the Vector-Best VectoCrimean-CHF-IgM and -IgG ELISAs using the EUROIMMUN CCHFV Mosaic 2 IgM and IgG indirect immunofluorescence assays (IFA) as reference. Forty-nine acute-phase serum samples from patients with CCHFV infection confirmed by reverse transcription-polymerase chain reaction (RT-PCR) and/or anti-CCHFV IgM IFA positivity were used to determine assay sensitivity. The assessment of specificity was based on sera from 30 control patients, 30 healthy blood donors, and 29 patients with hantavirus or sandfly fever virus infections. All samples originated from Turkey. Results: Sensitivity of the EUROIMMUN ELISAs (IgM 98.0%, IgG 47.1%) exceeded that of the Vector-Best ELISAs (IgM 95.9%, IgG 35.3%). Specificity of the EUROIMMUN ELISA IgM (86.4%) was slightly higher compared with the Vector-Best ELISA IgM (84.7%), while specificity for IgG was 100% for both assays. Qualitative agreement between the EUROIMMUN and Vector-Best ELISAs was substantial for detecting anti-CCHFV IgM (84.1%, ĸ = 0.673) and IgG (94.9%, ĸ = 0.791), whereas the quantitative results indicated a very strong positive correlation (IgM: r = 0.868, IgG: r = 0.913). Conclusion: The new EUROIMMUN anti-CCHFV ELISAs are standardized and easy-to-use tools that reliably support the identification of acute CCHF cases, and thus suitable for laboratories involved in on-site outbreak support.
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Affiliation(s)
- Yasemin Cosgun
- National Arboviruses and Viral Zoonotic Diseases Laboratory, Microbiology Reference Laboratories Department, Public Health General Directorate of Turkey, Ankara, Turkey
| | - Ahmet Aydemir
- National Arboviruses and Viral Zoonotic Diseases Laboratory, Microbiology Reference Laboratories Department, Public Health General Directorate of Turkey, Ankara, Turkey
| | - Hakan Hedef
- National Arboviruses and Viral Zoonotic Diseases Laboratory, Microbiology Reference Laboratories Department, Public Health General Directorate of Turkey, Ankara, Turkey
| | | | - Oliver Klemens
- Institute for Experimental Immunology, affiliated to EUROIMMUN Medizinische Labordiagnostika AG, Lübeck, Germany
| | - Erik Lattwein
- Institute for Experimental Immunology, affiliated to EUROIMMUN Medizinische Labordiagnostika AG, Lübeck, Germany
| | - Julia Maria Klemens
- Institute for Experimental Immunology, affiliated to EUROIMMUN Medizinische Labordiagnostika AG, Lübeck, Germany
| | - Sandra Saschenbrecker
- Institute for Experimental Immunology, affiliated to EUROIMMUN Medizinische Labordiagnostika AG, Lübeck, Germany
| | - Katja Steinhagen
- Institute for Experimental Immunology, affiliated to EUROIMMUN Medizinische Labordiagnostika AG, Lübeck, Germany
| | - Gulay Korukluoglu
- National Arboviruses and Viral Zoonotic Diseases Laboratory, Microbiology Reference Laboratories Department, Public Health General Directorate of Turkey, Ankara, Turkey
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Knowledge, attitudes, and practices regarding Crimean-Congo hemorrhagic fever among general people: A cross-sectional study in Pakistan. PLoS Negl Trop Dis 2022; 16:e0010988. [DOI: 10.1371/journal.pntd.0010988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 12/20/2022] [Accepted: 11/28/2022] [Indexed: 12/14/2022] Open
Abstract
Background
Crimean-Congo hemorrhagic fever (CCHF) continues to pose a serious threat to the fragile healthcare system of Pakistan with a continuous increase of morbidity and mortality. The present study aimed to assess the knowledge, attitudes, and practices regarding CCHF among general people who resided in Pakistan.
Methods
An online cross-sectional survey design was applied, and a convenience sampling technique was used to recruit 1039 adult people from Pakistan. Data were collected from September 08 to October 12, 2021. The questionnaire consisted of a total of 32 questions in four parts assessing socio-demographics, as well as knowledge, attitudes, and practices regarding CCHF. All statistical analyses were performed using the Statistical Package for the Social Sciences (SPSS), and logistic regression analyses were performed to determine the factors associated with good knowledge, positive attitudes, and good practices.
Results
Alarmingly, 51.5% of participants heard about CCHF infection before administering the survey. Among these, 20.2%, 33.3%, and 48.2% of the study participants had demonstrated good knowledge, positive attitudes, and good practices, respectively. Binary logistic regression analysis revealed that education and income status had a significant impact on knowledge and attitudes (p<0.05). Similarly, the mean attitude scores differed significantly by age, education, and income status (p<0.05).
Conclusions
The findings reflected inadequate levels of knowledge, attitudes, and practices regarding CCHF among general people in Pakistan which may regard as lower than expected. As CCHF is a highly contagious disease, it’s urgent to initiate a comprehensive approach to handle the situation before it spreads further in Pakistan.
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Tackling the Future Pandemics: Broad-Spectrum Antiviral Agents (BSAAs) Based on A-Type Proanthocyanidins. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27238353. [PMID: 36500445 PMCID: PMC9736452 DOI: 10.3390/molecules27238353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/22/2022] [Revised: 11/19/2022] [Accepted: 11/25/2022] [Indexed: 12/02/2022]
Abstract
A-type proanthocyanidins (PAC-As) are plant-derived natural polyphenols that occur as oligomers or polymers of flavan-3-ol monomers, such as (+)-catechin and (-)-epicatechin, connected through an unusual double A linkage. PAC-As are present in leaves, seeds, flowers, bark, and fruits of many plants, and are thought to exert protective natural roles against microbial pathogens, insects, and herbivores. Consequently, when tested in isolation, PAC-As have shown several biological effects, through antioxidant, antibacterial, immunomodulatory, and antiviral activities. PAC-As have been observed in fact to inhibit replication of many different human viruses, and both enveloped and non-enveloped DNA and RNA viruses proved sensible to their inhibitory effect. Mechanistic studies revealed that PAC-As cause reduction of infectivity of viral particles they come in contact with, as a result of their propensity to interact with virion surface capsid proteins or envelope glycoproteins essential for viral attachment and entry. As viral infections and new virus outbreaks are a major public health concern, development of effective Broad-Spectrum Antiviral Agents (BSAAs) that can be rapidly deployable even against future emerging viruses is an urgent priority. This review summarizes the antiviral activities and mechanism of action of PAC-As, and their potential to be deployed as BSAAs against present and future viral infections.
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27
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Klingelhofer D, Braun M, Bruggmann D, Groneberg DA. Ticks in medical and parasitological research: Globally emerging risks require appropriate scientific awareness and action. Travel Med Infect Dis 2022; 50:102468. [PMID: 36170957 DOI: 10.1016/j.tmaid.2022.102468] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 09/14/2022] [Accepted: 09/21/2022] [Indexed: 11/27/2022]
Abstract
BACKGROUND The spread of ticks has also led to the emergence of regional, previously unknown tick-borne diseases (TBDs) that pose an immediate threat to public health systems worldwide. People who spend time or work outdoors are at risk without closer awareness of regional exposures. That is especially true for tourists, who very easily come into contact with ticks and get bitten while hiking and climbing. A regional lack of surveillance, lack of awareness, lack of scientific background, and misdiagnosis makes it hard to assess the actual threat properly. METHODS Therefore, this bibliometric study aims to assess the global research on ticks and some TBDs. Geographical and temporal patterns are elaborated under epidemiological and socioeconomic aspects. That will provide a factual basis for targeted action at the scientific, societal, and policy levels against the growing threat associated with ticks. RESULTS The USA and Brazil can be identified as the key players in tick research, followed by Russia and some Central European countries. The socioeconomic analysis points to epidemiologically relevant regions, as also shown by comparison with the TBD analysis. A correlation between countries' gross domestic product and publication performance was found. Lack of scientific resources limits the necessary research and surveillance programs. CONCLUSIONS Many regions that are popular travel destinations are threatened by new tick species and thus new health risks. Therefore, outdoor activities in many locations may pose an unknown hazard that requires regionally differentiated scientific investigation and better, globally networked research strategies.
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Affiliation(s)
- Doris Klingelhofer
- Institute of Occupational, Social and Environmental Medicine, Goethe University, Frankfurt, Germany.
| | - Markus Braun
- Institute of Occupational, Social and Environmental Medicine, Goethe University, Frankfurt, Germany
| | - Dörthe Bruggmann
- Institute of Occupational, Social and Environmental Medicine, Goethe University, Frankfurt, Germany
| | - David A Groneberg
- Institute of Occupational, Social and Environmental Medicine, Goethe University, Frankfurt, Germany
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28
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Perveen N, Khan G. Crimean–Congo hemorrhagic fever in the Arab world: A systematic review. Front Vet Sci 2022; 9:938601. [PMID: 36176697 PMCID: PMC9513365 DOI: 10.3389/fvets.2022.938601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Accepted: 08/25/2022] [Indexed: 11/23/2022] Open
Abstract
Crimean-Congo hemorrhagic fever (CCHF) is an important tick-borne viral infection with a fatality rate of up to 50% during outbreaks. Crimean-Congo hemorrhagic fever virus (CCHFV) is sustained in the ecosystem in benign form through vertical and horizontal transmission cycles involving tick vectors, wildlife, and livestock. Hyalomma ticks are considered the major source of human infection. CCHF occurs most often among butchers, slaughterhouse workers, and farmworkers through infected tick bites or/and contact with blood and tissues of infected livestock. The nosocomial transmission can occur in auxiliary nurses and physicians through contact with the infected patients. The widespread distribution of CCHFV most probably occurred by ticks on migratory birds, or through international travel and trade of livestock and wildlife. During co-infections of ticks and vertebrates, reassortment among genome segments could play a significant role in generating diversity, and hence, a potential risk for the emergence of novel variants. In this systematic review, we aimed to determine the epidemiology, transmission, distribution, mortality, and clinical features of CCHF in 22 Arab countries, comprising the Arab world. Based on the analysis of 57 studies published from 1978 to 2021, we found 20 tick species that could be associated with CCHFV transmission. During the 43-year period, 321 cases of CCHF were reported from 9/22 Arab countries, Iraq, Kuwait, UAE, Saudi Arabia, Oman, Sudan, Egypt, Tunisia, and Mauritania. The mean case fatality rate was 29% during various outbreaks. Individuals working in abattoirs/slaughter houses, livestock farms, and healthcare were most at risk. Contact with blood or body secretions from infected animals and patients was the most common mode of transmission. A number of different animals, including cattle, goats, sheep, and camels were reported to be seropositive for CCHFV. The highest seroprevalence was observed in camels (29%), followed by cattle (21%), goats (15%), and sheep (14%). We discuss these results in the context of policy-making and potential preventative measures that can be implemented to reduce the burden of CCHF in the Arab world.
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Affiliation(s)
- Nighat Perveen
- Department of Biology, College of Science, United Arab Emirates University, Al-Ain, United Arab Emirates
| | - Gulfaraz Khan
- Department of Microbiology & Immunology, College of Medicine and Health Sciences, United Arab Emirates University, Al-Ain, United Arab Emirates
- *Correspondence: Gulfaraz Khan
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The discrepancy of Crimean-Congo hemorrhagic fever-related tick vectors: An urgent need for boosted surveillance. Ann Med Surg (Lond) 2022; 81:104412. [PMID: 36035598 PMCID: PMC9411570 DOI: 10.1016/j.amsu.2022.104412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2022] [Accepted: 08/12/2022] [Indexed: 11/21/2022] Open
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Nurettin C, Engin B, Sukru T, Munir A, Zati V, Aykut O. The Seroprevalence of Crimean-Congo Hemorrhagic Fever in Wild and Domestic Animals: An Epidemiological Update for Domestic Animals and First Seroevidence in Wild Animals from Turkiye. Vet Sci 2022; 9:vetsci9090462. [PMID: 36136678 PMCID: PMC9501697 DOI: 10.3390/vetsci9090462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 08/25/2022] [Accepted: 08/26/2022] [Indexed: 12/05/2022] Open
Abstract
Simple Summary Crimean-Congo hemorrhagic fever is a tick-borne and zoonotic emerging viral disease that is characterized by the sudden development of high fever and vascular bleeding in humans. The seroevidence among livestock has been reported, but it is less known in wild animals. Due to the importance and emerging state of the disease, we conducted a serosurvey on both domestic and wild animals in different areas of Turkiye. Serological investigations conducted on cattle, goats, and sheep revealed 10.81%, 15.15%, and 19.23% seropositivity, respectively, in the collected serum samples. We also found seropositivity rates in hare (23.81%) and wild boars (2.5%) indicating the substantial role of wild animals in virus epidemiology in Turkiye. This study provides first seroevidence of Crimean Congo hemorrhagic fever in wild animals in Turkiye. Abstract Crimean-Congo hemorrhagic fever virus (CCHFV) is a zoonotic, tick-borne pathogen that is endemic to some parts of Europe, Africa, and Asia. The disease causes fever and hemorrhagic manifestations in humans but not in animals. Domestic and wild animals are asymptomatic hosts of CCHFV and are critical in the transmission cycle. Hyalomma marginatum spp. has been identified as the natural reservoir and vector of the virus in Turkiye. A few studies have been conducted on domesticated animals showing the seroprevalence of CCHFV in them, but seroevidence in wild animals is absent. For contributing this antrum to the understanding of virus transmission in Turkiye, we performed a seroprevalence investigation of CCHFV in both wild and domesticated animals in various geographical areas of Turkiye. In-house IgG iELISA was performed for the screening of sera IgG in a total of 582 animal samples collected from boar (n = 40), cattle (n = 259), goat (n = 132), hare (n = 21), and sheep (n = 130). Results from ELISA performed on domestic animals revealed 10.81%, 15.15%, and 19.23% anti-CCHF virus seropositivity in cattle, goats, and sheep, respectively, in collected serum samples. ELISA tests performed in wild animals showed 23.81% and 2.5% positivity in hare and wild boars, respectively, suggesting the importance of wild animals in CCHF virus epidemiology in Turkiye. This study performed the first serological investigation of CCHFV in wild animals and provided the first seroevidence of CCHFV in wild boars and hare in Turkiye.
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Affiliation(s)
- Canakoglu Nurettin
- Department of Virology, Milas Faculty of Veterinary Science, Muğla Sıtkı Koçman University, Muğla 48200, Türkiye
- Correspondence: (C.N.); (B.E.)
| | - Berber Engin
- Department of Biomedical and Diagnostic Sciences, College of Veterinary Medicine, University of Tennessee, Knoxville, TN 37996, USA
- Correspondence: (C.N.); (B.E.)
| | - Tonbak Sukru
- Department of Virology, Faculty of Veterinary Medicine, Firat University, Elazığ 23119, Türkiye
| | - Aktas Munir
- Department of Parasitology, Faculty of Veterinary Medicine, Firat University, Elazığ 23119, Türkiye
| | - Vatansever Zati
- Department of Parasitology, Faculty of Veterinary Medicine, Kafkas University, Kars 36100, Türkiye
| | - Ozdarendeli Aykut
- Vaccine Research, Development, and Application Center, Erciyes University, Kayseri 38280, Türkiye
- Department of Microbiology, Medical Faculty, Erciyes University, Kayseri 38280, Türkiye
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Zhang X, Li HY, Shao JW, Pei MC, Cao C, Huang FQ, Sun MF. Genomic characterization and phylogenetic analysis of a novel Nairobi sheep disease genogroup Orthonairovirus from ticks, Southeastern China. Front Microbiol 2022; 13:977405. [PMID: 36090082 PMCID: PMC9453679 DOI: 10.3389/fmicb.2022.977405] [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: 06/24/2022] [Accepted: 08/10/2022] [Indexed: 11/13/2022] Open
Abstract
The increasing prevalence and transmission of tick-borne diseases, especially those emerging ones, have posed a significant threat to public health. Thus, the discovery of neglected pathogenic agents carried and transmitted by ticks is urgently needed. Using unbiased high-throughput sequencing, a novel Orthonairovirus designated as Meihua Mountain virus (MHMV), was identified in bloodsucking ticks collected from cattle and wild boars in Fujian province, Southeastern China. The full-length genome was determined by RT-PCR and RACE. Genomic architecture of MHMV shares typical features with orthonairoviruses. Phylogenetic analyses suggested that MHMV is clustered into the Nairobi sheep disease (NSD) genogroup of the genus Orthonairovirus and is closely related to the Hazara virus. The RdRp, GPC, and N protein of MHMV shares 62.3%–83.5%, 37.1%–66.1%, and 53.4%–77.3% amino acid identity with other NSD genogroup viruses, respectively, representing a novel species. The overall pooled prevalence of MHMV in ticks was 2.53% (95% CI: 1.62%–3.73%, 22 positives of 134 tick pools), with 7.38% (95% CI: 3.84%–12.59%, 11 positives of 18 pools) in Haemaphysalis hystricis, 6.02% (95% CI: 1.85%–14.22%, four positives of eight pools) in H. formosensis, 25.03% (95% CI: 9.23%–54.59%, six positive of eight pools) in Dermacentor taiwanensis, and 0.16% (95% CI: 0.01%–0.72%, one positive of 100 pools) in Rhipicephalus microplus. This study presented the first report of tick-carried Orthonairovirus in Fujian province and highlighted the broad geographic distribution and high genetic diversity of orthonairoviruses in China.
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Affiliation(s)
- Xu Zhang
- School of Life Science and Engineering, Foshan University, Foshan, China
| | - Hang-Yuan Li
- School of Life Science and Engineering, Foshan University, Foshan, China
| | - Jian-Wei Shao
- School of Life Science and Engineering, Foshan University, Foshan, China
| | - Ming-Chao Pei
- School of Life Science and Engineering, Foshan University, Foshan, China
| | - Chong Cao
- Fujian Provincial Key Laboratory for the Prevention and Control of Animal Infectious Diseases and Biotechnology, Longyan, China
- Key Laboratory of Preventive Veterinary Medicine and Biotechnology, Longyan University, Longyan, China
| | - Fu-Qiang Huang
- School of Life Science and Engineering, Foshan University, Foshan, China
- *Correspondence: Fu-Qiang Huang,
| | - Ming-Fei Sun
- Zhaoqing/Maoming Branch Center of Guangdong Laboratory for Lingnan Modern Agricultural Science and Technology, Zhaoqing, China
- Key Laboratory of Livestock Disease Prevention of Guangdong Province, Guangzhou, China
- Key Laboratory of Avian Influenza and Other Major Poultry Diseases Prevention and Control, Ministry of Agriculture and Rural Affairs, Guangzhou, China
- Institute of Animal Health, Guangdong Academy of Agricultural Sciences, Guangzhou, China
- Ming-Fei Sun,
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Biselli R, Nisini R, Lista F, Autore A, Lastilla M, De Lorenzo G, Peragallo MS, Stroffolini T, D’Amelio R. A Historical Review of Military Medical Strategies for Fighting Infectious Diseases: From Battlefields to Global Health. Biomedicines 2022; 10:2050. [PMID: 36009598 PMCID: PMC9405556 DOI: 10.3390/biomedicines10082050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 08/12/2022] [Accepted: 08/13/2022] [Indexed: 11/17/2022] Open
Abstract
The environmental conditions generated by war and characterized by poverty, undernutrition, stress, difficult access to safe water and food as well as lack of environmental and personal hygiene favor the spread of many infectious diseases. Epidemic typhus, plague, malaria, cholera, typhoid fever, hepatitis, tetanus, and smallpox have nearly constantly accompanied wars, frequently deeply conditioning the outcome of battles/wars more than weapons and military strategy. At the end of the nineteenth century, with the birth of bacteriology, military medical researchers in Germany, the United Kingdom, and France were active in discovering the etiological agents of some diseases and in developing preventive vaccines. Emil von Behring, Ronald Ross and Charles Laveran, who were or served as military physicians, won the first, the second, and the seventh Nobel Prize for Physiology or Medicine for discovering passive anti-diphtheria/tetanus immunotherapy and for identifying mosquito Anopheline as a malaria vector and plasmodium as its etiological agent, respectively. Meanwhile, Major Walter Reed in the United States of America discovered the mosquito vector of yellow fever, thus paving the way for its prevention by vector control. In this work, the military relevance of some vaccine-preventable and non-vaccine-preventable infectious diseases, as well as of biological weapons, and the military contributions to their control will be described. Currently, the civil-military medical collaboration is getting closer and becoming interdependent, from research and development for the prevention of infectious diseases to disasters and emergencies management, as recently demonstrated in Ebola and Zika outbreaks and the COVID-19 pandemic, even with the high biocontainment aeromedical evacuation, in a sort of global health diplomacy.
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Affiliation(s)
- Roberto Biselli
- Ispettorato Generale della Sanità Militare, Stato Maggiore della Difesa, Via S. Stefano Rotondo 4, 00184 Roma, Italy
| | - Roberto Nisini
- Dipartimento di Malattie Infettive, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161 Roma, Italy
| | - Florigio Lista
- Dipartimento Scientifico, Policlinico Militare, Comando Logistico dell’Esercito, Via S. Stefano Rotondo 4, 00184 Roma, Italy
| | - Alberto Autore
- Osservatorio Epidemiologico della Difesa, Ispettorato Generale della Sanità Militare, Stato Maggiore della Difesa, Via S. Stefano Rotondo 4, 00184 Roma, Italy
| | - Marco Lastilla
- Istituto di Medicina Aerospaziale, Comando Logistico dell’Aeronautica Militare, Viale Piero Gobetti 2, 00185 Roma, Italy
| | - Giuseppe De Lorenzo
- Comando Generale dell’Arma dei Carabinieri, Dipartimento per l’Organizzazione Sanitaria e Veterinaria, Viale Romania 45, 00197 Roma, Italy
| | - Mario Stefano Peragallo
- Centro Studi e Ricerche di Sanità e Veterinaria, Comando Logistico dell’Esercito, Via S. Stefano Rotondo 4, 00184 Roma, Italy
| | - Tommaso Stroffolini
- Dipartimento di Malattie Infettive e Tropicali, Policlinico Umberto I, 00161 Roma, Italy
| | - Raffaele D’Amelio
- Dipartimento di Medicina Clinica e Molecolare, Sapienza Università di Roma, Via di Grottarossa 1035-1039, 00189 Roma, Italy
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Virome of Giant Panda-Infesting Ticks Reveals Novel Bunyaviruses and Other Viruses That Are Genetically Close to Those from Giant Pandas. Microbiol Spectr 2022; 10:e0203422. [PMID: 35916407 PMCID: PMC9430136 DOI: 10.1128/spectrum.02034-22] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Tick infestations have been reported as one of the factors threatening the health of giant pandas, but studies of viral pathogens carried by ticks feeding on the blood of giant pandas are limited. To assess whether blood-sucking ticks of giant pandas can carry viral pathogens and if so, whether the viruses in ticks are associated with those previously detected in giant panda hosts, we determined the viromes of ticks detached from giant pandas in a field stocking area in Sichuan Province, southwest China. Using viral metagenomics we identified 32 viral species in ticks, half of which (including anellovirus [n = 9], circovirus [n = 3], and gemycircularvirus [n = 4]) showed homology to viruses carried by giant pandas and their associated host species (such as red pandas and mosquitoes) in the same living domain. Remarkably, several viruses in this study phylogenetically assigned as bunyavirus, hepe-like virus, and circovirus were detected with relatively high abundance, but whether these newly identified tick-associated viruses can replicate in ticks and then transmit to host animals during a blood meal will require further investigation. These findings further expand our understanding of the role of giant panda-infesting ticks in the local ecosystem, especially related to viral acquisition and transmission, and lay a foundation to assess the risk for giant panda exposure to tick-borne viruses. IMPORTANCE Ticks rank only second to mosquitoes as blood-feeding arthropods, capable of spreading pathogens (including viruses, bacteria, and parasites) to hosts during a blood meal. To better understand the relationship between viruses carried by ticks and viruses that have been reported in giant pandas, it is necessary to analyze the viromes of giant panda-parasitic blood-sucking ticks. This study collected 421 ticks on the body surface of giant pandas in Sichuan Province, China. We characterized the extensive genetic diversity of viruses harbored by these ticks and reported frequent communication of viruses between giant pandas and their ticks. While most of the virome discovered here are nonpathogenic viruses from giant pandas and potentially tick-specific viruses, we revealed some possible tick-borne viruses, represented by novel bunyaviruses. This research contributes to the literature because currently there are few studies on the virome of giant panda-infesting ticks.
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Goletic T, Satrovic L, Softic A, Omeragic J, Goletic S, Soldo DK, Spahic AK, Zuko A, Satrovic E, Alic A. Serologic and molecular evidence for circulation of Crimean-Congo hemorrhagic fever virus in ticks and cattle in Bosnia and Herzegovina. Ticks Tick Borne Dis 2022; 13:102004. [PMID: 35834930 DOI: 10.1016/j.ttbdis.2022.102004] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 07/05/2022] [Accepted: 07/07/2022] [Indexed: 10/17/2022]
Abstract
Crimean-Congo haemorrhagic fever virus is a tick-borne zoonotic agent of the genus Orthonairovirus, and the causal agent of Crimean-Congo haemorrhagic fever in humans. The study is aimed at investigating the presence of CCHFV RNA in ticks and cattle in Bosnia and Herzegovina (B&H), as well as the exposure of cattle to CCHFV in this country. Only one pool of three male Hyalomma marginatum ticks tested positive for viral RNA (3/760, 0.39%). No viral RNA was detected in 206 bovine blood samples using real-time reverse-transcriptase PCR (RT-qPCR). The overall seroprevalence of CCHFV in the cattle population was estimated as 14.97% (72/481). The results indicate the presence and the established circulation of CCHFV in B&H. Considering the endemic character of CCHFV in the Balkans as well as our results, the possibility that CCHFV is endemic in the territory of Bosnia and Herzegovina is considered to be very high.
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Affiliation(s)
- Teufik Goletic
- Veterinary Faculty, University of Sarajevo, Zmaja od Bosne 90, Sarajevo 71000, Bosnia and Herzegovina.
| | - Lejla Satrovic
- Veterinary Faculty, University of Sarajevo, Zmaja od Bosne 90, Sarajevo 71000, Bosnia and Herzegovina
| | - Adis Softic
- Veterinary Faculty, University of Sarajevo, Zmaja od Bosne 90, Sarajevo 71000, Bosnia and Herzegovina
| | - Jasmin Omeragic
- Veterinary Faculty, University of Sarajevo, Zmaja od Bosne 90, Sarajevo 71000, Bosnia and Herzegovina
| | - Sejla Goletic
- Veterinary Faculty, University of Sarajevo, Zmaja od Bosne 90, Sarajevo 71000, Bosnia and Herzegovina
| | - Darinka Klaric Soldo
- Veterinary Faculty, University of Sarajevo, Zmaja od Bosne 90, Sarajevo 71000, Bosnia and Herzegovina
| | - Amira Koro Spahic
- Veterinary Faculty, University of Sarajevo, Zmaja od Bosne 90, Sarajevo 71000, Bosnia and Herzegovina
| | - Almedina Zuko
- Veterinary Faculty, University of Sarajevo, Zmaja od Bosne 90, Sarajevo 71000, Bosnia and Herzegovina
| | - Edin Satrovic
- Veterinary Faculty, University of Sarajevo, Zmaja od Bosne 90, Sarajevo 71000, Bosnia and Herzegovina
| | - Amer Alic
- Veterinary Faculty, University of Sarajevo, Zmaja od Bosne 90, Sarajevo 71000, Bosnia and Herzegovina
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Recent advances in treatment Crimean-Congo hemorrhagic fever virus: A concise overview. Microb Pathog 2022; 169:105657. [PMID: 35753597 DOI: 10.1016/j.micpath.2022.105657] [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: 02/20/2022] [Revised: 05/19/2022] [Accepted: 06/22/2022] [Indexed: 11/22/2022]
Abstract
The Crimean Congo Hemorrhagic Fever Virus (CCHFV) is widespread in Africa, Asia, and Europe, among other places. The disease was initially discovered in the Crimean cities of the Soviet Union and the Congo, and it was given the name Crimean Congo because it induces hemorrhagic fever. According to studies, when the virus enters the body, it settles in immune cells such as macrophages and dendritic cells, causing them to malfunction and secrete inflammatory cytokines such as TNF-alpha, IL1, and IL6, resulting in cytokine storms that induces shock via endothelial activation and vascular leakage, while on the other hand, clots and disseminated intravascular coagulation (DIC) formation causes massive defects in various organs such as the liver and kidneys, as well as fatal bleeding. Disease prevention and treatment are crucial since no other effective vaccination against the disease has yet been developed. Immunotherapy is utilized as a consequence. One of the most effective treatments, when combined with compensatory therapies such as blood and platelet replacement, water, electrolytes, Fresh Frozen Plasma (FFP) replacement, and other compensatory therapies, is one of the most effective treatments. Studies; show that immunotherapy using IVIG and neutralizing and non-neutralizing monoclonal antibodies; cytokine therapy, and anti-inflammatory therapy using corticosteroids are effective ways to treat the disease.
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Freitas N, Legros V, Cosset FL. Crimean-Congo hemorrhagic fever: a growing threat to Europe. C R Biol 2022; 345:17-36. [DOI: 10.5802/crbiol.78] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Accepted: 04/15/2022] [Indexed: 11/24/2022]
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Wang Q, Cao R, Li L, Liu J, Yang J, Li W, Yan L, Wang Y, Yan Y, Li J, Deng F, Zhou Y, Wang M, Zhong W, Hu Z. In vitro and in vivo efficacy of a novel nucleoside analog H44 against Crimean–Congo hemorrhagic fever virus. Antiviral Res 2022; 199:105273. [DOI: 10.1016/j.antiviral.2022.105273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Revised: 02/23/2022] [Accepted: 02/26/2022] [Indexed: 11/02/2022]
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Lado S, Futas J, Plasil M, Loney T, Weidinger P, Camp JV, Kolodziejek J, Kannan DO, Horin P, Nowotny N, Burger PA. Crimean-Congo Hemorrhagic Fever Virus Past Infections Are Associated with Two Innate Immune Response Candidate Genes in Dromedaries. Cells 2021; 11:8. [PMID: 35011568 PMCID: PMC8750074 DOI: 10.3390/cells11010008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Accepted: 12/15/2021] [Indexed: 12/16/2022] Open
Abstract
Dromedaries are an important livestock, used as beasts of burden and for meat and milk production. However, they can act as an intermediate source or vector for transmitting zoonotic viruses to humans, such as the Middle East respiratory syndrome coronavirus (MERS-CoV) or Crimean-Congo hemorrhagic fever virus (CCHFV). After several outbreaks of CCHFV in the Arabian Peninsula, recent studies have demonstrated that CCHFV is endemic in dromedaries and camel ticks in the United Arab Emirates (UAE). There is no apparent disease in dromedaries after the bite of infected ticks; in contrast, fever, myalgia, lymphadenopathy, and petechial hemorrhaging are common symptoms in humans, with a case fatality ratio of up to 40%. We used the in-solution hybridization capture of 100 annotated immune genes to genotype 121 dromedaries from the UAE tested for seropositivity to CCHFV. Through univariate linear regression analysis, we identified two candidate genes belonging to the innate immune system: FCAR and CLEC2B. These genes have important functions in the host defense against viral infections and in stimulating natural killer cells, respectively. This study opens doors for future research into immune defense mechanisms in an enzootic host against an important zoonotic disease.
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Affiliation(s)
- Sara Lado
- Research Institute of Wildlife Ecology, Department of Interdisciplinary Life Sciences, University of Veterinary Medicine Vienna, 1160 Vienna, Austria;
- Division of Infectious Diseases and Tropical Medicine, Department of Medicine I, Medical University of Vienna, 1090 Vienna, Austria
| | - Jan Futas
- Department of Animal Genetics, University of Veterinary Sciences Brno, 61242 Brno, Czech Republic; (J.F.); (M.P.); (P.H.)
- RG Animal Immunogenomics, CEITEC VETUNI Brno, 61242 Brno, Czech Republic
| | - Martin Plasil
- Department of Animal Genetics, University of Veterinary Sciences Brno, 61242 Brno, Czech Republic; (J.F.); (M.P.); (P.H.)
- RG Animal Immunogenomics, CEITEC VETUNI Brno, 61242 Brno, Czech Republic
| | - Tom Loney
- College of Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai 505055, United Arab Emirates; (T.L.); (N.N.)
| | - Pia Weidinger
- Viral Zoonoses, Emerging and Vector-Borne Infections Group, Institute of Virology, University of Veterinary Medicine Vienna, 1210 Vienna, Austria; (P.W.); (J.V.C.); (J.K.)
| | - Jeremy V. Camp
- Viral Zoonoses, Emerging and Vector-Borne Infections Group, Institute of Virology, University of Veterinary Medicine Vienna, 1210 Vienna, Austria; (P.W.); (J.V.C.); (J.K.)
- Center for Virology, Medical University of Vienna, 1090 Vienna, Austria
| | - Jolanta Kolodziejek
- Viral Zoonoses, Emerging and Vector-Borne Infections Group, Institute of Virology, University of Veterinary Medicine Vienna, 1210 Vienna, Austria; (P.W.); (J.V.C.); (J.K.)
| | | | - Petr Horin
- Department of Animal Genetics, University of Veterinary Sciences Brno, 61242 Brno, Czech Republic; (J.F.); (M.P.); (P.H.)
- RG Animal Immunogenomics, CEITEC VETUNI Brno, 61242 Brno, Czech Republic
| | - Norbert Nowotny
- College of Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai 505055, United Arab Emirates; (T.L.); (N.N.)
- Viral Zoonoses, Emerging and Vector-Borne Infections Group, Institute of Virology, University of Veterinary Medicine Vienna, 1210 Vienna, Austria; (P.W.); (J.V.C.); (J.K.)
| | - Pamela A. Burger
- Research Institute of Wildlife Ecology, Department of Interdisciplinary Life Sciences, University of Veterinary Medicine Vienna, 1160 Vienna, Austria;
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Berber E, Çanakoğlu N, Tonbak Ş, Ozdarendeli A. Development of a protective inactivated vaccine against Crimean-Congo hemorrhagic fever infection. Heliyon 2021; 7:e08161. [PMID: 34703927 PMCID: PMC8526982 DOI: 10.1016/j.heliyon.2021.e08161] [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: 04/03/2021] [Revised: 08/09/2021] [Accepted: 10/08/2021] [Indexed: 12/19/2022] Open
Abstract
Crimean-Congo hemorrhagic fever (CCHF) is an emerging zoonotic infectious disease caused by Crimean-Congo hemorrhagic fever virus (CCHFV). The first clinical CCHF infection was described in 1944 in the Crimean Peninsula, exclusively in humans, with case-fatality rates exceeding 30%. The increasing number of cases, high mortality rate, and lack of effective therapy make CCHF a serious threat to public health and a potential bioterrorism agent. The present study evaluated the development, immunogenicity, and immune response durations for cell-culture-derived inactivated vaccine (CCVax) formulations in comparison with those of mouse-brain-derived vaccine (MBVax) formulations. In this study, the Kelkit06 CCHF virus strain was propagated in both suckling mice and Vero E6 cells, and purified with a sucrose gradient. Formalin-inactivated vaccine candidates were formulated at various doses [low dose (LD), 5 μg; medium dose (MD), 10 μg; high dose (HD), 20 μg)] and mixed with an alum adjuvant. BALB/c mice received the same doses of the vaccine formulations three times at 3-week intervals. The humoral endpoint IgG responses were evaluated and compared for the MBVax and CCVax treatments. The duration of the presence of IgG and neutralizing antibody (Ab) titers was evaluated and compared until up to 1 year after immunization. The humoral IgG responses indicated that the CCVax and MBVax candidates enhanced the IgG endpoint titers in a dose-dependent manner, which were induced more strongly in all the CCVax groups than in the MBVax mice. The fold changes in neutralizing Ab levels were also found to be higher in the CCVax groups: between 2- and 7.6-fold after the second week of the last immunization. The neutralization titers peaked 4 months after immunization in all the vaccine-receiving groups, but these were still comparable at the end of the first year. The CCVax formulations induced higher IgG and neutralizing Ab titers at all the measured time points. In this study, we showed that cell-culture-purified and formalin-inactivated vaccine candidates induced strong and robust immunity in vaccinated mice dose-dependently, more so than mouse-brain-derived vaccines.
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Affiliation(s)
- Engin Berber
- Department of Biomedical and Diagnostic Sciences, College of Veterinary Medicine, The University of Tennessee, Knoxville, TN, 37996, USA.,Department of Virology, Faculty of Veterinary Medicine, Erciyes University, Kayseri, 38280 Turkey.,Vaccine Research, Development and Application Center, Erciyes University, Kayseri, 38280 Turkey.,Department of Virology, Faculty of Veterinary Medicine, Firat University, Elazığ, 23119, Turkey
| | - Nurettin Çanakoğlu
- Vaccine Research, Development and Application Center, Erciyes University, Kayseri, 38280 Turkey.,Department of Virology, Faculty of Veterinary Medicine, Firat University, Elazığ, 23119, Turkey.,Mugla Sitki Kocman University, Milas Faculty of Veterinary Science, Department of Virology, Muğla, 48200, Turkey.,Department of Microbiology, Medical Faculty, Erciyes University, Kayseri, 38280, Turkey
| | - Şükrü Tonbak
- Department of Virology, Faculty of Veterinary Medicine, Firat University, Elazığ, 23119, Turkey
| | - Aykut Ozdarendeli
- Vaccine Research, Development and Application Center, Erciyes University, Kayseri, 38280 Turkey.,Department of Microbiology, Medical Faculty, Erciyes University, Kayseri, 38280, Turkey
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