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Romero-Trancón D, Valero-Lorenzo M, Agüero M, Villalba R. Reference Material Production and Milk Protein Concentration as Elements to Improve Bluetongue Serological Diagnosis in Bulk Tank Milk. Viruses 2024; 16:915. [PMID: 38932207 PMCID: PMC11209147 DOI: 10.3390/v16060915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Revised: 05/29/2024] [Accepted: 05/30/2024] [Indexed: 06/28/2024] Open
Abstract
The serological surveillance of bluetongue in bulk tank milk is an efficient and cost-effective method for the early detection of bluetongue virus incursions in unvaccinated free areas of the disease. In addition, the availability of standardized and reliable reagents and refined diagnostic procedures with high sensitivity and specificity are essential for surveillance purposes. However, no available reference materials for bluetongue virus serological surveillance in bulk tank milk exist. This study shows the production and characterization of reference material for the implementation of a commercially available bluetongue milk ELISA test in official laboratories, as well as the evaluation of a procedure to increase the sensitivity in samples with low levels of antibodies. This procedure, based on milk protein concentration, allowed us to notably increase the ELISA test's analytical sensitivity, which is useful for milk samples from farms with low within-herd prevalence or pools of bulk tank milk samples. The standardized milk reference material produced here, together with the evaluated procedure to improve analytical sensitivity, could be applied as tools to ensure an accurate diagnosis by official laboratories in bluetongue unvaccinated free areas.
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Affiliation(s)
| | | | | | - Rubén Villalba
- Laboratorio Central de Veterinaria (LCV), Ministry of Agriculture, Fisheries and Food, Ctra. M-106, Km 1,4, 28110 Algete, Spain; (D.R.-T.); (M.V.-L.); (M.A.)
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2
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Viadanna PHO, Surphlis A, Cheng AC, Dixon CE, Meisner S, Wilson KN, White ZS, DeRuyter E, Logan TD, Krauer JMC, Lednicky JA, Wisely SM, Subramaniam K. A novel bluetongue virus serotype 2 strain isolated from a farmed Florida white-tailed deer (Odocoileus virginianus) arose from reassortment of gene segments derived from co-circulating serotypes in the Southeastern USA. Virus Genes 2024; 60:100-104. [PMID: 38182930 DOI: 10.1007/s11262-023-02047-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Accepted: 12/19/2023] [Indexed: 01/07/2024]
Abstract
Bluetongue disease is a reportable animal disease that affects wild and farmed ruminants, including white-tailed deer (WTD). This report documents the clinical findings, ancillary diagnostics, and genomic characterization of a novel reassortant bluetongue virus serotype 2 (BTV-2) strain isolated from a dead Florida farmed WTD in 2022. Our analyses support that this BTV-2 strain likely stemmed from the acquisition of genome segments from co-circulating BTV strains in Florida and Louisiana. In addition, our analyses also indicate that genetically uncharacterized BTV strains may be circulating in the Southeastern USA; however, the identity and reassortant status of these BTV strains cannot be determined based on the VP2 and VP5 genome sequences. Hence, continued surveillance based on complete genome characterization is needed to understand the genetic diversity of BTV strains in this region and the potential threat they may pose to the health of deer and other ruminants.
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Affiliation(s)
- Pedro H O Viadanna
- Department of Infectious Diseases and Immunology, College of Veterinary Medicine, University of Florida, 2015 SW 16th Avenue, Gainesville, FL, 32610, USA
- Emerging Pathogens Institute, University of Florida, 2055 Mowry Rd, Gainesville, FL, 32610, USA
| | - Austin Surphlis
- Department of Infectious Diseases and Immunology, College of Veterinary Medicine, University of Florida, 2015 SW 16th Avenue, Gainesville, FL, 32610, USA
- Emerging Pathogens Institute, University of Florida, 2055 Mowry Rd, Gainesville, FL, 32610, USA
| | - An-Chi Cheng
- Department of Large Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, 2015 SW 16th Avenue, Gainesville, FL, 32610, USA
| | - Catherine E Dixon
- Department of Large Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, 2015 SW 16th Avenue, Gainesville, FL, 32610, USA
| | - Sarah Meisner
- Department of Large Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, 2015 SW 16th Avenue, Gainesville, FL, 32610, USA
| | - Kristen N Wilson
- Emerging Pathogens Institute, University of Florida, 2055 Mowry Rd, Gainesville, FL, 32610, USA
- Department of Wildlife Ecology and Conservation, University of Florida, 110 Newins-Ziegler Hall, Gainesville, FL, 32611, USA
| | - Zoe S White
- Emerging Pathogens Institute, University of Florida, 2055 Mowry Rd, Gainesville, FL, 32610, USA
- Department of Wildlife Ecology and Conservation, University of Florida, 110 Newins-Ziegler Hall, Gainesville, FL, 32611, USA
| | - Emily DeRuyter
- Emerging Pathogens Institute, University of Florida, 2055 Mowry Rd, Gainesville, FL, 32610, USA
- Department of Environmental and Global Health, College of Public Health and Health Professions, University of Florida, 1225 Center Dr, Gainesville, FL, 32610, USA
| | - Tracey D Logan
- Emerging Pathogens Institute, University of Florida, 2055 Mowry Rd, Gainesville, FL, 32610, USA
- Department of Environmental and Global Health, College of Public Health and Health Professions, University of Florida, 1225 Center Dr, Gainesville, FL, 32610, USA
| | - Juan M C Krauer
- Department of Large Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, 2015 SW 16th Avenue, Gainesville, FL, 32610, USA
| | - John A Lednicky
- Emerging Pathogens Institute, University of Florida, 2055 Mowry Rd, Gainesville, FL, 32610, USA
- Department of Environmental and Global Health, College of Public Health and Health Professions, University of Florida, 1225 Center Dr, Gainesville, FL, 32610, USA
| | - Samantha M Wisely
- Emerging Pathogens Institute, University of Florida, 2055 Mowry Rd, Gainesville, FL, 32610, USA
- Department of Wildlife Ecology and Conservation, University of Florida, 110 Newins-Ziegler Hall, Gainesville, FL, 32611, USA
| | - Kuttichantran Subramaniam
- Department of Infectious Diseases and Immunology, College of Veterinary Medicine, University of Florida, 2015 SW 16th Avenue, Gainesville, FL, 32610, USA.
- Emerging Pathogens Institute, University of Florida, 2055 Mowry Rd, Gainesville, FL, 32610, USA.
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Carpenter MJ, Rodgers CR, Torchetti MK, Fox KA, Burton M, Sherman TJ, Mayo CE. Recovery of multireassortant bluetongue virus serotype 6 sequences from a mule deer (Odocoileus hemionus) and Dorset sheep (Ovis aries) in Colorado. Vet Microbiol 2024; 289:109944. [PMID: 38141398 DOI: 10.1016/j.vetmic.2023.109944] [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: 08/29/2023] [Revised: 12/05/2023] [Accepted: 12/10/2023] [Indexed: 12/25/2023]
Abstract
We report the discovery of two bluetongue virus serotype 6 (BTV-6) reassortants recovered from a domestic sheep and a free-ranging mule deer in northern Colorado. At the time of this publication, whole-genome sequencing of BTV-6 isolates in the Western U.S. have not been undertaken. These findings reflect the incursive movement of geographically distinct BTV serotypes into important agricultural areas of the U.S. and demonstrate reassortment with regionally circulating serotypes.
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Affiliation(s)
- Molly J Carpenter
- Department of Microbiology, Immunology, and Pathology, Colorado State University, 1601 Campus Delivery, Fort Collins, CO 80526, USA.
| | - Case R Rodgers
- Department of Microbiology, Immunology, and Pathology, Colorado State University, 1601 Campus Delivery, Fort Collins, CO 80526, USA.
| | - Mia K Torchetti
- National Veterinary Services Laboratories, Animal and Plant Health Inspection Service, US Department of Agriculture, 1800 Dayton Ave, Ames, IA 50010, USA.
| | - Karen A Fox
- Colorado Division of Parks and Wildlife, 4330 Laporte Avenue, Fort Collins, CO 80521, USA.
| | - Mollie Burton
- Department of Microbiology, Immunology, and Pathology, Colorado State University, 1601 Campus Delivery, Fort Collins, CO 80526, USA.
| | - Tyler J Sherman
- Diagnostic Medicine Center, Colorado State University, 2450 Gillette Drive, Fort Collins, CO 80526, USA.
| | - Christie E Mayo
- Department of Microbiology, Immunology, and Pathology, Colorado State University, 1601 Campus Delivery, Fort Collins, CO 80526, USA.
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Li N, Meng J, He Y, Wang W, Wang J. Potential roles of Culicoides spp. ( Culicoides imicola, Culicoides oxystoma) as biological vectors of bluetongue virus in Yuanyang of Yunnan, P. R. China. Front Cell Infect Microbiol 2024; 13:1283216. [PMID: 38274733 PMCID: PMC10809989 DOI: 10.3389/fcimb.2023.1283216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Accepted: 12/18/2023] [Indexed: 01/27/2024] Open
Abstract
Introduction Culicoides plays a crucial role as an insect vector in the field of veterinary medicine. The transmission of significant viruses such as bluetongue virus (BTV) and African horse sickness virus (AHSV) by this insect poses a substantial threat, leading to the development of severe diseases in domestic animals. This study aimed to explore the Culicoides species, identify their blood-meal sources, and assess the presence of BTV and AHSV carried by Culicoides in Yuanyang County, Yunnan Province. The aim was to gain insights into the potential vectors of these two viruses and elucidate their potential roles in the transmission of pathogens. Methods The midges were collected from cattle (Bos indicus), pig (Sus scrofa), and goat (Capra hircus) pens in Yuanyang County, Yunnan Province in June 2020. Initial identification of midges was conducted through morphological characteristics, followed by molecular identification using the cytochrome C oxidase subunit I (COI) gene. The determination of Culicoides blood-meal sources was accomplished using specific primers targeting the cytochrome b (Cyt b) gene from potential hosts. BTV and AHSV RNA were identified in Culicoides pools through the application of reverse transcriptase PCR and quantitative real-time PCR. Nucleotide homology and phylogenetic analysis were performed using MegAlign (DNAStar) and Mega 6.0 software. Results A total of 6,300 Culicoides, consisting of C. oxystoma, C. arakawai, C. imicola, and C. innoxius, were collected from cattle, pigs, and goat pens. The engorgement rates for these species were 30.2%, 54.6%, 75%, and 66.7%, respectively. In the cattle pen, the prevailing species is C. oxystoma (100%). In the pig pen, C. arakawai dominates (70%), with C. oxystoma following at 30%. In the goat pen, C. imicola holds the majority (45.45%), trailed by C. oxystoma (25%), C. innoxius (20.45%), and C. arakawai (9.09%). These Culicoides species were identified as feeding on cattle, pigs, goats, chickens (Gallus gallus), and humans (Homo sapiens). The positivity rates for BTV were 20.00% and 11.54% in blood-fed specimens of C. imicola and C. oxystoma, respectively. Conversely, the positivity rates for BTV in non-blood-fed specimens were 0.00% and 6.67% for C. imicola and C. oxystoma, respectively. BTV was not detected in C. arakawai and C. innoxius. The specimens (YY86) from C. imicola that tested positive for BTV had the closest genetic relationship to YTS-4 isolated from Mangshi, Yunnan Province in 1996. All test results for the nucleic acid of AHSV were negative. Conclusion The study reveals variations in the species distribution, community composition, blood sucking rate, and blood-feeding sources of Culicoides across different habitats. Notably, C. imicola and C. oxystoma emerge as potential vectors for the transmission of BTV in local animals. Accordingly, this investigation provides crucial insights that can serve as a valuable reference for the prevention and control of BTV in local animals, particularly from the perspective of vector management.
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Affiliation(s)
- Nan Li
- Yunnan Tropical and Subtropical Animal Viral Disease Laboratory, Yunnan Animal Science and Veterinary Institute, Kunming, China
| | - Jinxin Meng
- Yunnan Tropical and Subtropical Animal Viral Disease Laboratory, Yunnan Animal Science and Veterinary Institute, Kunming, China
| | - Yuwen He
- Yunnan Tropical and Subtropical Animal Viral Disease Laboratory, Yunnan Animal Science and Veterinary Institute, Kunming, China
| | - Wenhua Wang
- The Aquaculture Workstation of Yuanyang County Agriculture, Rural Affairs, and Science and Technology Bureau, Yuanyang, China
| | - Jinglin Wang
- Yunnan Tropical and Subtropical Animal Viral Disease Laboratory, Yunnan Animal Science and Veterinary Institute, Kunming, China
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Souiai O, Arbi M, Hanachi M, Sallami A, Larbi I, Chaouch M, Harigua-Souiai E, Benkahla A. Retrospective Phylodynamic and Phylogeographic Analysis of the Bluetongue Virus in Tunisia. Evol Bioinform Online 2023; 19:11769343231212266. [PMID: 38033662 PMCID: PMC10683408 DOI: 10.1177/11769343231212266] [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: 05/09/2023] [Accepted: 10/09/2023] [Indexed: 12/02/2023] Open
Abstract
Bluetongue virus (BTV) is an arbovirus considered as a major threat for the global livestock economy. Since 1999, Tunisia has experienced several incursions of BTV, during which numerous cases of infection and mortality have been reported. However, the geographical origin and epidemiological characteristics of these incursions remained unclear. To understand the evolutionary history of BTV emergence in Tunisia, we extracted from Genbank the segment 6 sequences of 7 BTV strains isolated in Tunisia during the period 2000 to 2017 and blasted them to obtain a final dataset of 67 sequences. We subjected the dataset to a Bayesian phylogeography framework inferring geographical origin and serotype as phylodynamic models. Our results suggest that BTV-2 was first introduced in Tunisia in the 1960s and that since 1990s, the country has witnessed the emergence of other typical and atypical BTV serotypes notably BTV-1, BTV-3 and BTV-Y. The reported serotypes have a diverse geographical origin and have been transmitted to Tunisia from countries in the Mediterranean Basin. Interserotype reassortments have been identified among BTV-1, BTV-2 and BTV-Y. This study has provided new insights on the temporal and geographical origin of BTV in Tunisia, suggesting the contribution of animal trade and environment conditions in virus spread.
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Affiliation(s)
- Oussema Souiai
- Laboratory of Bioinformatics, Biomathematics and Biostatistics (LR16IPT09), Institut Pasteur of Tunis, University Tunis El Manar, Tunis, Tunisia
| | - Marwa Arbi
- Laboratory of Bioinformatics, Biomathematics and Biostatistics (LR16IPT09), Institut Pasteur of Tunis, University Tunis El Manar, Tunis, Tunisia
| | - Mariem Hanachi
- Laboratory of Bioinformatics, Biomathematics and Biostatistics (LR16IPT09), Institut Pasteur of Tunis, University Tunis El Manar, Tunis, Tunisia
| | - Ameny Sallami
- Laboratory of Bioinformatics, Biomathematics and Biostatistics (LR16IPT09), Institut Pasteur of Tunis, University Tunis El Manar, Tunis, Tunisia
| | - Imen Larbi
- Laboratory of Epidemiology and Veterinary Microbiology, LR20IPT03, Institut Pasteur of Tunis, University Tunis El Manar, Tunis, Tunisia
| | - Melek Chaouch
- Laboratory of Bioinformatics, Biomathematics and Biostatistics (LR16IPT09), Institut Pasteur of Tunis, University Tunis El Manar, Tunis, Tunisia
| | - Emna Harigua-Souiai
- Laboratory of Molecular Epidemiology and Experimental Pathology-LR16IPT04, Institut Pasteur of Tunis, University Tunis El Manar, Tunis, Tunisia
| | - Alia Benkahla
- Laboratory of Bioinformatics, Biomathematics and Biostatistics (LR16IPT09), Institut Pasteur of Tunis, University Tunis El Manar, Tunis, Tunisia
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Viadanna PHO, Grace SG, Logan TD, DeRuyter E, Loeb JC, Wilson KN, White ZS, Krauer JMC, Lednicky JA, Waltzek TB, Wisely SM, Subramaniam K. Characterization of two novel reassortant bluetongue virus serotype 1 strains isolated from farmed white-tailed deer (Odocoileus virginianus) in Florida, USA. Virus Genes 2023; 59:732-740. [PMID: 37439882 DOI: 10.1007/s11262-023-02019-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Accepted: 06/27/2023] [Indexed: 07/14/2023]
Abstract
Hemorrhagic diseases caused by epizootic hemorrhagic disease virus or by bluetongue virus (BTV) are the most important orbivirus diseases affecting ruminants, including white-tailed deer (WTD). Bluetongue virus is of particular concern for farmed WTD in Florida, given its lethality and its wide distribution throughout the state. This study reports the clinical findings, ancillary diagnostics, and genomic characterization of two BTV serotype 1 strains isolated from two farmed WTD, from two different farms in Florida in 2019 and 2022. Phylogenetic and genetic analyses indicated that these two novel BTV-1 strains were reassortants. In addition, our analyses reveal that most genome segments of these strains were acquired from BTVs previously detected in ruminants in Florida, substantiating their endemism in the Southeastern U.S. Our findings underscore the need for additional research to determine the genetic diversity of BTV strains in Florida, their prevalence, and the potential risk of new BTV strains to WTD and other ruminants.
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Affiliation(s)
- Pedro H O Viadanna
- Department of Infectious Diseases and Immunology, College of Veterinary Medicine, University of Florida, 32611, Gainesville, FL, USA
- Emerging Pathogens Institute, University of Florida, 32611, Gainesville, FL, USA
| | - Savannah G Grace
- Emerging Pathogens Institute, University of Florida, 32611, Gainesville, FL, USA
- Department of Wildlife Ecology and Conservation, University of Florida, 32611, Gainesville, FL, USA
| | - Tracey D Logan
- Emerging Pathogens Institute, University of Florida, 32611, Gainesville, FL, USA
- Department of Environmental and Global Health, College of Public Health and Health Professions, University of Florida, 32611, Gainesville, FL, USA
| | - Emily DeRuyter
- Emerging Pathogens Institute, University of Florida, 32611, Gainesville, FL, USA
- Department of Environmental and Global Health, College of Public Health and Health Professions, University of Florida, 32611, Gainesville, FL, USA
| | - Julia C Loeb
- Emerging Pathogens Institute, University of Florida, 32611, Gainesville, FL, USA
- Department of Environmental and Global Health, College of Public Health and Health Professions, University of Florida, 32611, Gainesville, FL, USA
| | - Kristen N Wilson
- Emerging Pathogens Institute, University of Florida, 32611, Gainesville, FL, USA
- Department of Wildlife Ecology and Conservation, University of Florida, 32611, Gainesville, FL, USA
| | - Zoe S White
- Emerging Pathogens Institute, University of Florida, 32611, Gainesville, FL, USA
- Department of Wildlife Ecology and Conservation, University of Florida, 32611, Gainesville, FL, USA
| | - Juan M C Krauer
- Department of Large Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, 32611, Gainesville, FL, USA
- Washington Animal Disease Diagnostic Laboratory, Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, 99164, Pullman, WA, USA
| | - John A Lednicky
- Emerging Pathogens Institute, University of Florida, 32611, Gainesville, FL, USA
- Department of Environmental and Global Health, College of Public Health and Health Professions, University of Florida, 32611, Gainesville, FL, USA
| | - Thomas B Waltzek
- Department of Infectious Diseases and Immunology, College of Veterinary Medicine, University of Florida, 32611, Gainesville, FL, USA
- Emerging Pathogens Institute, University of Florida, 32611, Gainesville, FL, USA
- Washington Animal Disease Diagnostic Laboratory, Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, 99164, Pullman, WA, USA
| | - Samantha M Wisely
- Emerging Pathogens Institute, University of Florida, 32611, Gainesville, FL, USA
- Department of Wildlife Ecology and Conservation, University of Florida, 32611, Gainesville, FL, USA
| | - Kuttichantran Subramaniam
- Department of Infectious Diseases and Immunology, College of Veterinary Medicine, University of Florida, 32611, Gainesville, FL, USA.
- Emerging Pathogens Institute, University of Florida, 32611, Gainesville, FL, USA.
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Tzeng HY, Ting LJ, Chiu CI, Lin NN, Liao KM, Tu WC. Occurrence and surveillance of Taiwanese bovine arboviruses using hematophagous insects in dairy farms during 2012-2019. JOURNAL OF MEDICAL ENTOMOLOGY 2023; 60:1117-1123. [PMID: 37499051 PMCID: PMC10496439 DOI: 10.1093/jme/tjad096] [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: 12/12/2022] [Revised: 06/26/2023] [Accepted: 07/17/2023] [Indexed: 07/29/2023]
Abstract
Culicoides-borne viruses are an important arbovirus group causing bovine diseases. During 2012-2019, 2,525 pools consisting of 108,937 specimens of vectors were subjected to PCR detection of bovine arbovirus belonging to Orthobunyavirus, Orbivirus, and Ephemerovirus. Twelve virus RNAs, of which 6, that is, Shuni virus, Shamonda virus, and Sathuperi virus in Orthobunyavirus and Sathuvachari virus and epizootic hemorrhagic disease virus serotypes 4 and 7 in Orbivirus were detected for the first time in the area. Potential vector species were evaluated by the minimum infection rate, and the population abundance of Culicoides oxystoma, Culex tritaeniorhynchus, and Anopheles sinensis indicated that they were the main potential vector species in dairy farms in Taiwan.
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Affiliation(s)
- Hau-You Tzeng
- Department of Entomology, National Chung Hsing University, Taichung City 40225, Taiwan
| | - Lu-Jen Ting
- Animal Health Research Institute, Council of Agriculture, Executive Yuan, New Taipei City 25158, Taiwan
| | - Chin-Ing Chiu
- Department of Entomology, National Chung Hsing University, Taichung City 40225, Taiwan
| | - Nien-Nung Lin
- Council of Agriculture, Bureau of Animal and Plant Health Inspection and Quarantine, Taipei City 100060, Taiwan
| | - Kuei-Min Liao
- Department of Entomology, National Chung Hsing University, Taichung City 40225, Taiwan
- National Mosquito-Borne Diseases Control Research Center, National Health Research Institutes, Kaohsiung City 801301, Taiwan
| | - Wu-Chun Tu
- Department of Entomology, National Chung Hsing University, Taichung City 40225, Taiwan
- National Mosquito-Borne Diseases Control Research Center, National Health Research Institutes, Kaohsiung City 801301, Taiwan
- School of Life Sciences and Technology, Bandung Institute of Technology, Bandung, West Java 40132, Indonesia
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Mendez-Andrade A, Ibáñez-Bernal S. An updated catalogue of biting midges of the genus Culicoides Latreille, 1809 (Diptera, Ceratopogonidae) of Mexico and their known distribution by state. Zookeys 2023; 1167:1-47. [PMID: 37363735 PMCID: PMC10285685 DOI: 10.3897/zookeys.1167.102858] [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: 03/01/2023] [Accepted: 05/15/2023] [Indexed: 06/28/2023] Open
Abstract
An updated catalogue of Culicoides of Mexico is presented. It includes 86 species with their regional distribution and corresponding record references, known immature stages and associated pathogens. In addition, a taxonomic key for subgenera and species groups for Mexico is presented and an index of species by state is included.
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Affiliation(s)
- Alejandro Mendez-Andrade
- Instituto de Ecología, A.C. Red Ambiente y Sustentabilidad. Carretera antigua a Coatepec 351, Col. El Haya, Xalapa, Veracruz, C.P. 91073, MexicoInstituto de Ecología, A. C. Red Ambiente y SustentabilidadXalapaMexico
| | - Sergio Ibáñez-Bernal
- Instituto de Ecología, A.C. Red Ambiente y Sustentabilidad. Carretera antigua a Coatepec 351, Col. El Haya, Xalapa, Veracruz, C.P. 91073, MexicoInstituto de Ecología, A. C. Red Ambiente y SustentabilidadXalapaMexico
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Zhang S, Zhang Q, Zhang H, Liang R, Chen Q, Niu B. Assessing the export trade risk of bluetongue virus serotypes 4 and 8 in France. RISK ANALYSIS : AN OFFICIAL PUBLICATION OF THE SOCIETY FOR RISK ANALYSIS 2023; 43:1124-1136. [PMID: 35994609 DOI: 10.1111/risa.14011] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Bluetongue (BT) causes an economic loss of $3 billion every year in the world. After two serious occurrences of BT (bluetongue virus [BTV] occurrence in 2006 and 2015), France has been controlling for decades, but it has not been eradicated. As the largest live cattle export market in the world, France is also one of the major exporters of breeding animals and genetic materials in the world. The biosafety of its exported cattle and products has always been a concern. The scenario tree quantitative model was used to analyze the risk of BTV release from French exported live cattle and bovine semen. The results showed that with the increase in vaccination coverage rates, the risk decreased. If the vaccine coverage is 0%, the areas with the highest average risk probability of BTV-4 and BTV-8 release from exported live cattle were Haute-Savoie and Puy-de-Dôme, and the risk was 2.96 × 10-4 and 4.25 × 10-4 , respectively. When the vaccine coverage was 90%, the risk probability of BTV-4 and BTV-8 release from exported live cattle was 2.96 × 10-5 and 4.24 × 10-5 , respectively. The average probability of BTV-8 release from bovine semen was 1.09 × 10-10 . Sensitivity analysis showed that the probability of false negative polymerase chain reaction (PCR) test and the probability of BT infection in the bull breeding station had an impact on the model. The identification of high-risk areas and the discovery of key control measures provide a reference for decision makers to assess the risk of French exports of live cattle and bovine semen.
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Affiliation(s)
- Shuwen Zhang
- School of Life Sciences, Shanghai University, Shanghai, China
| | - Qiang Zhang
- Technical Center for Animal, Plant and Food Inspection and Quarantine of Shanghai Customs, Shanghai, China
| | - Hui Zhang
- School of Life Sciences, Shanghai University, Shanghai, China
| | - Ruirui Liang
- School of Life Sciences, Shanghai University, Shanghai, China
| | - Qin Chen
- School of Life Sciences, Shanghai University, Shanghai, China
| | - Bing Niu
- School of Life Sciences, Shanghai University, Shanghai, China
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Castro RJSD, Oliveira FAS, Tenorio TGDS, Porto WJN, Moreira MAS, Soares MJDS, Silva-Júnior A, Schwarz DGG. BIOGEOGRAPHY OF THE SPREAD OF BLUETONGUE DISEASE IN SHEEP IN BRAZIL. Small Rumin Res 2023. [DOI: 10.1016/j.smallrumres.2023.106964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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Ellis VA, Ciloglu A, Yildirim A, Bensch S. Host shift and natural long-distance dispersal to an oceanic island of a host-specific parasite. Biol Lett 2023; 19:20220459. [PMID: 36918035 PMCID: PMC10014241 DOI: 10.1098/rsbl.2022.0459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Accepted: 02/22/2023] [Indexed: 03/16/2023] Open
Abstract
Parasite dispersal and host-switching may be better understood by knowing when they occurred. We estimated when the ancestor of a parasite of great reed warblers (Acrocephalus arundinaceus) dispersed to the Seychelles and began infecting the endemic Seychelles warbler (A. sechellensis). We used mitochondrial genomes and published molecular divergence rates to estimate the date of divergence between mitochondrial haplotypes of the parasite Haemoproteus nucleocondensis (lineage GRW01) in the great reed warbler and the Seychelles warbler. We also constructed a time-calibrated phylogeny of the hosts and their relatives to determine when the ancestor of the Seychelles warbler dispersed to the Seychelles. The two GRW01 lineages diverged ca 20-451 kya, long after the ancestor of the Seychelles warbler colonized the Seychelles ca 1.76-4.36 Mya. GRW01 rarely infects other species despite apparent opportunity. Humans were likely not involved in the dispersal of this parasite because humans settled the Seychelles long after the parasite diverged from its mainland relative. Furthermore, introduced birds are unlikely hosts of GRW01. Instead, the ancestor of GRW01 may have dispersed to the Seychelles with an errant migrating great reed warbler. Our results indicate that even specialized parasites can naturally disperse long distances to become emerging infectious diseases.
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Affiliation(s)
- Vincenzo A. Ellis
- Department of Entomology and Wildlife Ecology, University of Delaware, Newark, DE, USA
| | - Arif Ciloglu
- Department of Parasitology, Faculty of Veterinary Medicine, Erciyes University, Kayseri, Türkiye
- Vectors and Vector-Borne Diseases Implementation and Research Center, Erciyes University, Kayseri, Türkiye
| | - Alparslan Yildirim
- Department of Parasitology, Faculty of Veterinary Medicine, Erciyes University, Kayseri, Türkiye
- Vectors and Vector-Borne Diseases Implementation and Research Center, Erciyes University, Kayseri, Türkiye
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Hoffmann B, Joseph S, Patteril NAG, Caveney MR, Elizabeth SK, Muhammed R, Wernery R, Wernery U. Comparative Genome Analysis of All Nine African Horse Sickness Serotypes Isolated From Equine Fatalities in Kenya and South Africa. J Equine Vet Sci 2022; 119:104137. [PMID: 36223818 DOI: 10.1016/j.jevs.2022.104137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 09/30/2022] [Accepted: 10/03/2022] [Indexed: 11/06/2022]
Abstract
African horse sickness (AHS) is a viral disease of equids, caused by a virus of the genus Orbivirus, family Reoviridae. The African horse sickness virus (AHSV) genome is made up of ten double-stranded RNA (dsRNA) segments that together code for seven structural and four nonstructural proteins. AHS is endemic in sub-Saharan countries. The efficacy and safety of inactivated AHS vaccines containing all nine serotypes, produced at the Central Veterinary Research Laboratory (CVRL) in Dubai, United Arab Emirates have been proven in the past. All nine AHSV serotypes were isolated from 102 samples collected in the last 20 years from horse fatalities in seven different area of Kenya, Africa. CVRL inactivated AHS vaccines are used in a few African countries defining the importance of this present study to compare the genome sequences of the nine AHSV serotypes isolated from horse fatalities in Kenya and nine AHSV serotypes isolated in South Africa. The hypothesized serotypes of the newly sequenced AHSV field strains from Kenya were likewise confirmed in this investigation, and they show substantial sequence homologies with recently isolated AHSV field strains.
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Affiliation(s)
- Bernd Hoffmann
- Friedrich-Loeffler-Institut, Institute of Diagnostic Virology, Greifswald - Insel Riems, Germany
| | - Sunitha Joseph
- Central Veterinary Research Laboratory, Dubai, United Arab Emirates
| | | | | | | | - Rubeena Muhammed
- Central Veterinary Research Laboratory, Dubai, United Arab Emirates
| | - Renate Wernery
- Central Veterinary Research Laboratory, Dubai, United Arab Emirates
| | - Ulrich Wernery
- Central Veterinary Research Laboratory, Dubai, United Arab Emirates.
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Kar S, Mondal B, Ghosh J, Mazumdar SM, Mazumdar A. Host preference of bluetongue virus vectors, Culicoides species associated with livestock in West Bengal, India: Potential relevance on bluetongue epidemiology. Acta Trop 2022; 235:106648. [PMID: 35961406 DOI: 10.1016/j.actatropica.2022.106648] [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: 06/28/2022] [Revised: 08/07/2022] [Accepted: 08/08/2022] [Indexed: 11/20/2022]
Abstract
Determination of host choice of Culicoides species (Diptera: Ceratopogonidae), the vectors of bluetongue virus (BTV), is pivotal to ascertain the role of each species in the transmission of pathogens, pest management and enumeration of disease prediction models. Host preference of livestock associated Culicoides midges was investigated in West Bengal, India with four replicates of a 3 × 3 Latin square design during August and September 2021. Adult Culicoides were mouth aspirated from three BTV hosts viz., cattle, sheep and goats. Mouth aspirating was validated by the sweep net collections. The host-baited collections recorded seven Culicoides species; with the highest landing rate on cattle (n = 5,667; 92.9%) followed by sheep (n = 365; 6.0%) and goat (n = 67; 1.1%). Based on the Jacob's selectivity index, all midge species, except for Culicoides fulvus Sen & Das Gupta, encountered, preferred cattle over other mammalian hosts. Culicoides oxystoma Kieffer, the subgenus Trithecoides Wirth & Hubert and Culicoides actoni Smith, predominated on the ventral region (belly/flank) of the cattle. However, Culicoides peregrinus Kieffer and C. actoni were observed to be prevalent in the leg region of sheep. A significantly higher percentage of female (99.9%) with only 0.3% of male were trapped in aspiration based animal baited collections. On the other hand sweep net and light trap catch comprises of 50.7%, 89.7% female and 49.2%, 10.2% male respectively. Surprisingly, DNA based blood meal analysis revealed human blood from the midges trapped in UV-LED light traps. Supplying the first evidence that Culicoides similis Carter, Ingram & Macfie, C. fulvus and Culicoides palpifer Das Gupta & Ghosh, feed on humans.
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Affiliation(s)
- Surajit Kar
- Entomology Research Unit, Department of Zoology, The University of Burdwan, Burdwan, West Bengal 713104, India
| | - Biswajit Mondal
- Entomology Research Unit, Department of Zoology, The University of Burdwan, Burdwan, West Bengal 713104, India
| | - Joydeep Ghosh
- Tata Consultancy Services, Ecospace 2A, AA II, Newtown, West Bengal 700135, India
| | | | - Abhijit Mazumdar
- Entomology Research Unit, Department of Zoology, The University of Burdwan, Burdwan, West Bengal 713104, India.
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Spatial epidemiology of hemorrhagic disease in Illinois wild white-tailed deer. Sci Rep 2022; 12:6888. [PMID: 35477968 PMCID: PMC9046210 DOI: 10.1038/s41598-022-10694-y] [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: 09/28/2021] [Accepted: 04/05/2022] [Indexed: 11/08/2022] Open
Abstract
Epizootic hemorrhagic disease (EHD) and bluetongue (BT) are vector-borne viral diseases that affect wild and domestic ruminants. Clinical signs of EHD and BT are similar; thus, the syndrome is referred to as hemorrhagic disease (HD). Syndromic surveillance and virus detection in North America reveal a northern expansion of HD. High mortalities at northern latitudes suggest recent incursions of HD viruses into northern geographic areas. We evaluated the occurrence of HD in wild Illinois white-tailed deer from 1982 to 2019. Our retrospective space-time analysis identified high-rate clusters of HD cases from 2006 to 2019. The pattern of northward expansion indicates changes in virus-host-vector interactions. Serological evidence from harvested deer revealed prior infection with BTV. However, BTV was not detected from virus isolation in dead deer sampled during outbreaks. Our findings suggest the value of capturing the precise geographic location of outbreaks, the importance of virus isolation to confirm the cause of an outbreak, and the importance of expanding HD surveillance to hunter-harvested wild white-tailed deer. Similarly, it assists in predicting future outbreaks, allowing for targeted disease and vector surveillance, helping wildlife agencies communicate with the public the cause of mortality events and viral hemorrhagic disease outcomes at local and regional scales.
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Transcriptomics Reveal Several Novel Viruses from Canegrubs (Coleoptera: Scarabaeidae) in Central Queensland, Australia. Viruses 2022; 14:v14030649. [PMID: 35337056 PMCID: PMC8949096 DOI: 10.3390/v14030649] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 03/08/2022] [Accepted: 03/17/2022] [Indexed: 12/21/2022] Open
Abstract
Canegrubs (Coleoptera: Scarabaeidae) are major pests of sugarcane crops in Australia, but despite long-term and intensive research, no commercially viable biological control agents have been identified. We used the RNA-Seq approach to explore the viriomes of three different species of canegrubs from central Queensland, Australia to identify potential candidates for biological control. We identified six novel RNA viruses, characterized their genomes, and inferred their evolutionary relationships with other closely related viruses. These novel viruses showed similarity to other known members from picornaviruses, benyviruses, sobemoviruses, totiviruses, and reoviruses. The abundance of viral reads varied in these libraries; for example, Dermolepida albohirtum picorna-like virus (9696 nt) was built from 83,894 assembled reads while only 1350 reads mapped to Lepidiota negatoria beny-like virus (6371 nt). Future studies are essential to determine their natural incidence in different life stages of the host, biodiversity, geographical distributions, and potential as biological control agents for these important pests of sugarcane.
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Analysis of bluetongue disease epizootics in sheep of Andhra Pradesh, India using spatial and temporal autocorrelation. Vet Res Commun 2022; 46:967-978. [PMID: 35194693 DOI: 10.1007/s11259-022-09902-x] [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: 08/12/2021] [Accepted: 02/10/2022] [Indexed: 10/19/2022]
Abstract
Bluetongue (BT) disease poses a constant risk to the livestock population around the world. A better understanding of the risk factors will enable a more accurate prediction of the place and time of high-risk events. Mapping the disease epizootics over a period in a particular geographic area will identify the spatial distribution of disease occurrence. A Geographical Information System (GIS) based methodology to analyze the relationship between bluetongue epizootics and spatial-temporal patterns was used for the years 2000 to 2015 in sheep of Andhra Pradesh, India. Autocorrelation (ACF), partial autocorrelation (PACF), and cross-correlation (CCF) analyses were carried out to find the self-dependency between BT epizootics and their dependencies on environmental factors and livestock population. The association with climatic or remote sensing variables at different months lag, including wind speed, temperature, rainfall, relative humidity, normalized difference vegetation index (NDVI), normalized difference water index (NDWI), land surface temperature (LST), was also examined. The ACF & PACF of BT epizootics with its lag showed a significant positive autocorrelation with a month's lag (r = 0.41). Cross-correlations between the environmental variables and BT epizootics indicated the significant positive correlations at 0, 1, and 2 month's lag of rainfall, relative humidity, normalized difference water index (NDWI), and normalized difference vegetation index (NDVI). Spatial autocorrelation analysis estimated the univariate global Moran's I value of 0.21. Meanwhile, the local Moran's I value for the year 2000 (r = 0.32) showed a high degree of spatial autocorrelation. The spatial autocorrelation analysis revealed that the BT epizootics in sheep are having considerable spatial association among the outbreaks in nearby districts, and have to be taken care of while making any forecasting or disease prediction with other risk factors.
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Vaccination as a Strategy to Prevent Bluetongue Virus Vertical Transmission. Pathogens 2021; 10:pathogens10111528. [PMID: 34832683 PMCID: PMC8622840 DOI: 10.3390/pathogens10111528] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Revised: 11/13/2021] [Accepted: 11/19/2021] [Indexed: 11/17/2022] Open
Abstract
Bluetongue virus (BTV) produces an economically important disease in ruminants of compulsory notification to the OIE. BTV is typically transmitted by the bite of Culicoides spp., however, some BTV strains can be transmitted vertically, and this is associated with fetus malformations and abortions. The viral factors associated with the virus potency to cross the placental barrier are not well defined. The potency of vertical transmission is retained and sometimes even increased in live attenuated BTV vaccine strains. Because BTV possesses a segmented genome, the possibility of reassortment of vaccination strains with wild-type virus could even favor the transmission of this phenotype. In the present review, we will describe the non-vector-based BTV infection routes and discuss the experimental vaccination strategies that offer advantages over this drawback of some live attenuated BTV vaccines.
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Alkhamis MA, Fountain‐Jones NM, Aguilar‐Vega C, Sánchez‐Vizcaíno JM. Environment, vector, or host? Using machine learning to untangle the mechanisms driving arbovirus outbreaks. ECOLOGICAL APPLICATIONS : A PUBLICATION OF THE ECOLOGICAL SOCIETY OF AMERICA 2021; 31:e02407. [PMID: 34245639 PMCID: PMC9286057 DOI: 10.1002/eap.2407] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 01/28/2021] [Accepted: 03/03/2021] [Indexed: 06/13/2023]
Abstract
Climatic, landscape, and host features are critical components in shaping outbreaks of vector-borne diseases. However, the relationship between the outbreaks of vector-borne pathogens and their environmental drivers is typically complicated, nonlinear, and may vary by taxonomic units below the species level (e.g., strain or serotype). Here, we aim to untangle how these complex forces shape the risk of outbreaks of Bluetongue virus (BTV); a vector-borne pathogen that is continuously emerging and re-emerging across Europe, with severe economic implications. We tested if the ecological predictors of BTV outbreak risk were serotype-specific by examining the most prevalent serotypes recorded in Europe (1, 4, and 8). We used a robust machine learning (ML) pipeline and 23 relevant environmental features to fit predictive models to 24,245 outbreaks reported in 25 European countries between 2000 and 2019. Our ML models demonstrated high predictive performance for all BTV serotypes (accuracies > 0.87) and revealed strong nonlinear relationships between BTV outbreak risk and environmental and host features. Serotype-specific analysis suggests, however, that each of the major serotypes (1, 4, and 8) had a unique outbreak risk profile. For example, temperature and midge abundance were as the most important characteristics shaping serotype 1, whereas for serotype 4 goat density and temperature were more important. We were also able to identify strong interactive effects between environmental and host characteristics that were also serotype specific. Our ML pipeline was able to reveal more in-depth insights into the complex epidemiology of BTVs and can guide policymakers in intervention strategies to help reduce the economic implications and social cost of this important pathogen.
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Affiliation(s)
- Moh A. Alkhamis
- Department of Epidemiology and BiostatisticsFaculty of Public HeathHealth Sciences CentreKuwait UniversityKuwait City13110Kuwait
| | - Nicholas M. Fountain‐Jones
- School of Natural SciencesUniversity of TasmaniaHobartTasmania7001Australia
- Department of Veterinary Population MedicineCollege of Veterinary MedicineUniversity of MinnesotaSt. PaulMinnesota55108USA
| | - Cecilia Aguilar‐Vega
- VISAVET Health Surveillance Centre and Animal Health DepartmentVeterinary SchoolComplutense University of MadridMadrid28040Spain
| | - José M. Sánchez‐Vizcaíno
- VISAVET Health Surveillance Centre and Animal Health DepartmentVeterinary SchoolComplutense University of MadridMadrid28040Spain
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Bluetongue and Epizootic Hemorrhagic Disease in the United States of America at the Wildlife-Livestock Interface. Pathogens 2021; 10:pathogens10080915. [PMID: 34451380 PMCID: PMC8402076 DOI: 10.3390/pathogens10080915] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 07/18/2021] [Accepted: 07/19/2021] [Indexed: 11/17/2022] Open
Abstract
Bluetongue (BT) and epizootic hemorrhagic disease (EHD) cases have increased worldwide, causing significant economic loss to ruminant livestock production and detrimental effects to susceptible wildlife populations. In recent decades, hemorrhagic disease cases have been reported over expanding geographic areas in the United States. Effective BT and EHD prevention and control strategies for livestock and monitoring of these diseases in wildlife populations depend on an accurate understanding of the distribution of BT and EHD viruses in domestic and wild ruminants and their vectors, the Culicoides biting midges that transmit them. However, national maps showing the distribution of BT and EHD viruses and the presence of Culicoides vectors are incomplete or not available at all. Thus, efforts to accurately describe the potential risk of these viruses on ruminant populations are obstructed by the lack of systematic and routine surveillance of their hosts and vectors. In this review, we: (1) outline animal health impacts of BT and EHD in the USA; (2) describe current knowledge of the distribution and abundance of BT and EHD and their vectors in the USA; and (3) highlight the importance of disease (BT and EHD) and vector surveillance for ruminant populations.
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Ramírez-Martínez MM, Bennett AJ, Dunn CD, Yuill TM, Goldberg TL. Bat Flies of the Family Streblidae (Diptera: Hippoboscoidea) Host Relatives of Medically and Agriculturally Important "Bat-Associated" Viruses. Viruses 2021; 13:v13050860. [PMID: 34066683 PMCID: PMC8150819 DOI: 10.3390/v13050860] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 04/30/2021] [Accepted: 05/04/2021] [Indexed: 01/05/2023] Open
Abstract
Bat flies (Hippoboscoidea: Nycteribiidae and Streblidae) are obligate hematophagous ectoparasites of bats. We collected streblid bat flies from the New World (México) and the Old World (Uganda), and used metagenomics to identify their viruses. In México, we found méjal virus (Rhabdoviridae; Vesiculovirus), Amate virus (Reoviridae: Orbivirus), and two unclassified viruses of invertebrates. Méjal virus is related to emerging zoonotic encephalitis viruses and to the agriculturally important vesicular stomatitis viruses (VSV). Amate virus and its sister taxon from a bat are most closely related to mosquito- and tick-borne orbiviruses, suggesting a previously unrecognized orbivirus transmission cycle involving bats and bat flies. In Uganda, we found mamucuso virus (Peribunyaviridae: Orthobunyavirus) and two unclassified viruses (a rhabdovirus and an invertebrate virus). Mamucuso virus is related to encephalitic viruses of mammals and to viruses from nycteribiid bat flies and louse flies, suggesting a previously unrecognized orthobunyavirus transmission cycle involving hippoboscoid insects. Bat fly virus transmission may be neither strictly vector-borne nor strictly vertical, with opportunistic feeding by bat flies occasionally leading to zoonotic transmission. Many "bat-associated" viruses, which are ecologically and epidemiologically associated with bats but rarely or never found in bats themselves, may actually be viruses of bat flies or other bat ectoparasites.
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Affiliation(s)
- María M. Ramírez-Martínez
- Departamento de Ciencias de la Salud y Ecología Humana, Universidad de Guadalajara, Guadalajara, Autlán CP 48900, Mexico;
| | - Andrew J. Bennett
- Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin–Madison, Madison, WI 53706, USA; (A.J.B.); (C.D.D.); (T.M.Y.)
- Genomics and Bioinformatics Department, Biological Defense Research Directorate, Naval Medical Research Center–Frederick, Fort Detrick, Frederick, MD 21702, USA
| | - Christopher D. Dunn
- Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin–Madison, Madison, WI 53706, USA; (A.J.B.); (C.D.D.); (T.M.Y.)
| | - Thomas M. Yuill
- Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin–Madison, Madison, WI 53706, USA; (A.J.B.); (C.D.D.); (T.M.Y.)
| | - Tony L. Goldberg
- Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin–Madison, Madison, WI 53706, USA; (A.J.B.); (C.D.D.); (T.M.Y.)
- Correspondence: ; Tel.: +1-608-890-2618
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