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Colgate VA, Sepulveda Caviedes MF. World Equine Veterinary Association Congress moves to Chile: A collection of articles for the South American practitioner. Equine Vet J 2023; 55:940-943. [PMID: 37827176 DOI: 10.1111/evj.13993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Accepted: 08/11/2023] [Indexed: 10/14/2023]
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Wasik BR, Rothschild E, Voorhees IEH, Reedy SE, Murcia PR, Pusterla N, Chambers TM, Goodman LB, Holmes EC, Kile JC, Parrish CR. Understanding the divergent evolution and epidemiology of H3N8 influenza viruses in dogs and horses. Virus Evol 2023; 9:vead052. [PMID: 37692894 PMCID: PMC10484056 DOI: 10.1093/ve/vead052] [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: 03/22/2023] [Revised: 06/12/2023] [Accepted: 08/16/2023] [Indexed: 09/12/2023] Open
Abstract
Cross-species virus transmission events can lead to dire public health emergencies in the form of epidemics and pandemics. One example in animals is the emergence of the H3N8 equine influenza virus (EIV), first isolated in 1963 in Miami, FL, USA, after emerging among horses in South America. In the early 21st century, the American lineage of EIV diverged into two 'Florida' clades that persist today, while an EIV transferred to dogs around 1999 and gave rise to the H3N8 canine influenza virus (CIV), first reported in 2004. Here, we compare CIV in dogs and EIV in horses to reveal their host-specific evolution, to determine the sources and connections between significant outbreaks, and to gain insight into the factors controlling their different evolutionary fates. H3N8 CIV only circulated in North America, was geographically restricted after the first few years, and went extinct in 2016. Of the two EIV Florida clades, clade 1 circulates widely and shows frequent transfers between the USA and South America, Europe and elsewhere, while clade 2 was globally distributed early after it emerged, but since about 2018 has only been detected in Central Asia. Any potential zoonotic threat of these viruses to humans can only be determined with an understanding of its natural history and evolution. Our comparative analysis of these three viral lineages reveals distinct patterns and rates of sequence variation yet with similar overall evolution between clades, suggesting epidemiological intervention strategies for possible eradication of H3N8 EIV.
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Affiliation(s)
- Brian R Wasik
- Baker Institute for Animal Health, Department of Microbiology and Immunology, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA
| | - Evin Rothschild
- Baker Institute for Animal Health, Department of Microbiology and Immunology, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA
| | - Ian E H Voorhees
- Baker Institute for Animal Health, Department of Microbiology and Immunology, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA
| | - Stephanie E Reedy
- Department of Veterinary Science, Gluck Equine Research Center, University of Kentucky, Lexington, KY 40546, USA
| | - Pablo R Murcia
- MRC-University of Glasgow Centre for Virus Research, School of Infection and Immunity, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow G61 1QH, Scotland
| | - Nicola Pusterla
- Department of Medicine & Epidemiology, School Veterinary Medicine, University of California, Davis, CA 95616, USA
| | - Thomas M Chambers
- Department of Veterinary Science, Gluck Equine Research Center, University of Kentucky, Lexington, KY 40546, USA
| | - Laura B Goodman
- Baker Institute for Animal Health, Department of Public and Ecosystems Health, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA
| | - Edward C Holmes
- Sydney Institute for Infectious Diseases, School of Medical Sciences, University of Sydney, Sydney, NSW 2006, Australia
| | - James C Kile
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, GA 30329, USA
| | - Colin R Parrish
- Baker Institute for Animal Health, Department of Microbiology and Immunology, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA
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Gonzalez-Obando J, Forero JE, Zuluaga-Cabrera AM, Ruiz-Saenz J. Equine Influenza Virus: An Old Known Enemy in the Americas. Vaccines (Basel) 2022; 10:vaccines10101718. [PMID: 36298583 PMCID: PMC9610386 DOI: 10.3390/vaccines10101718] [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: 08/12/2022] [Revised: 10/08/2022] [Accepted: 10/11/2022] [Indexed: 11/06/2022] Open
Abstract
Equine influenza is a highly contagious disease caused by the H3N8 equine influenza virus (EIV), which is endemically distributed throughout the world. It infects equids, and interspecies transmission to dogs has been reported. The H3N8 Florida lineage, which is divided into clades 1 and 2, is the most representative lineage in the Americas. The EIV infects the respiratory system, affecting the ciliated epithelial cells and preventing the elimination of foreign bodies and substances. Certain factors related to the disease, such as an outdated vaccination plan, age, training, and close contact with other animals, favor the presentation of equine influenza. This review focuses on the molecular, pathophysiological, and epidemiological characteristics of EIV in the Americas to present updated information to achieve prevention and control of the virus. We also discuss the need for monitoring the disease, the use of vaccines, and the appropriate application of those biologicals, among other biosecurity measures that are important for the control of the virus.
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Affiliation(s)
- Juliana Gonzalez-Obando
- Grupo de Investigación en Ciencias Animales—GRICA, Facultad de Medicina Veterinaria y Zootecnia, Universidad Cooperativa de Colombia, Bucaramanga 680002, Colombia
| | - Jorge Eduardo Forero
- Grupo de Investigación en Microbiología Veterinaria, Escuela de Microbiología, Universidad de Antioquia, Medellín 050010, Colombia
| | - Angélica M Zuluaga-Cabrera
- Facultad de Medicina Veterinaria y Zootecnia, Fundación Universitaria Autónoma de las Américas, Circular 73 N°35-04, Medellín 050010, Colombia
| | - Julián Ruiz-Saenz
- Grupo de Investigación en Ciencias Animales—GRICA, Facultad de Medicina Veterinaria y Zootecnia, Universidad Cooperativa de Colombia, Bucaramanga 680002, Colombia
- Correspondence:
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Alaql FA, Alhafufi AN, Kasem S, Alhammad YMO, Albaqshi H, Alyousaf A, Alsubaie FM, Alghamdi AN, Abdel-Moneim AS, Alharbi SA. Full-Length Genome of the Equine Influenza A Virus Subtype H3N8 from 2019 Outbreak in Saudi Arabia. Animals (Basel) 2022; 12:ani12192720. [PMID: 36230462 PMCID: PMC9558945 DOI: 10.3390/ani12192720] [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] [Received: 09/09/2022] [Revised: 10/04/2022] [Accepted: 10/07/2022] [Indexed: 11/05/2022] Open
Abstract
Simple Summary Equine influenza is a highly contagious respiratory viral disease. The current study is the first to provide a description of the full-length genome sequence and surveillance of recent exposure to the equine influenza virus (EIV) during the 2019 epidemic in Saudi Arabia. This epidemic was benign, since it resulted in low case fatality (0.45%, 1/224). The viruses detected in the current study were found to be related to subtype H73N8 clade 1 of the Florida sublineage. Full-length genome sequencing revealed no evidence of major genetic changes or of reassortment among the eight segments of the viral genome. However, the Saudi strains showed a considerable number of amino acid substitutions in the signal peptide (2 amino acid substitutions), HA1 (10 amino acid substitutions) and HA2 (4 amino acid substitutions) in the haemagglutinin glycoprotein in comparison to clade 1 Florida sublineage vaccinal strains. These findings should be considered during selection of the equine influenza vaccine strains approved for use in Saudi Arabia. Abstract Equine influenza is a major cause of respiratory infections in horses and can spread rapidly despite the availability of commercial vaccines. This study aimed to screen the incidence of equine influenza virus (EIV) and molecularly characterize the haemagglutinin and neuraminidase from positive EIV field samples collected from Saudi Arabia. Six-hundred twenty-one horses from 57 horse barns were screened for the presence of the clinical signs, suggestive for equine influenza, from different parts of Saudi Arabia. Nasopharyngeal swabs were collected from each horse showing respiratory distress. Samples from the same horse barn were pooled together and screened for the presence of the influenza A virus using quantitative real time reverse transcriptase polymerase chain reaction (qRT-PCR). Selective positive samples were subjected to full-length genome sequencing using MiSeq Illumina. Out of the total 57 pools, 39 were found positive to EIV using qRT-PCR. Full-length gene sequences were compared with representative EIV strains selected from the GenBank database. Phylogenetic analysis of the HA and NA genes revealed that the identified virus strains belong to H3N8 clade 1 of the Florida sublineage and were very similar to viruses identified in USA in 2019, with no current evidence for reassortment. This is one of the first reports providing detailed description and characterization of EIVs in Saudi Arabia. Detailed surveillance and genetic information sharing could allow genetic evolution of equine influenza viruses to be monitored more effectively on a global basis and aid in refinement of vaccine strain selection for EIV.
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Affiliation(s)
- Fanan A. Alaql
- Virology and Genome Department in Central Veterinary Laboratory (CVL), Ministry of Environment, Water and Agriculture (MEWA), P.O. Box 15831, Riyadh 11454, Saudi Arabi
- Botany & Microbiology Department, College of Science, King Saud University, Riyadh 12372, Saudi Arabia
| | - Ali N. Alhafufi
- Virology and Genome Department in Central Veterinary Laboratory (CVL), Ministry of Environment, Water and Agriculture (MEWA), P.O. Box 15831, Riyadh 11454, Saudi Arabi
| | - Samy Kasem
- Department of Virology, Faculty of Veterinary Medicine, Kafrelsheikh University, El Geish Street, Kafrelsheikh 33516, Egypt
- Correspondence: (S.K.); (A.S.A.-M.)
| | - Yousef M. O. Alhammad
- Virology and Genome Department in Central Veterinary Laboratory (CVL), Ministry of Environment, Water and Agriculture (MEWA), P.O. Box 15831, Riyadh 11454, Saudi Arabi
| | - Hassan Albaqshi
- Virology and Genome Department in Central Veterinary Laboratory (CVL), Ministry of Environment, Water and Agriculture (MEWA), P.O. Box 15831, Riyadh 11454, Saudi Arabi
| | - Ameen Alyousaf
- Virology and Genome Department in Central Veterinary Laboratory (CVL), Ministry of Environment, Water and Agriculture (MEWA), P.O. Box 15831, Riyadh 11454, Saudi Arabi
| | - Faisal M. Alsubaie
- Virology and Genome Department in Central Veterinary Laboratory (CVL), Ministry of Environment, Water and Agriculture (MEWA), P.O. Box 15831, Riyadh 11454, Saudi Arabi
| | - Ahmed N. Alghamdi
- Department of Microbiology, College of Medicine, Taif University, Taif 21944, Saudi Arabia
| | - Ahmed S. Abdel-Moneim
- Department of Microbiology, College of Medicine, Taif University, Taif 21944, Saudi Arabia
- Correspondence: (S.K.); (A.S.A.-M.)
| | - Sulaiman A. Alharbi
- Botany & Microbiology Department, College of Science, King Saud University, Riyadh 12372, Saudi Arabia
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Frequency of Detection and Prevalence Factors Associated with Common Respiratory Pathogens in Equids with Acute Onset of Fever and/or Respiratory Signs (2008–2021). Pathogens 2022; 11:pathogens11070759. [PMID: 35890002 PMCID: PMC9317490 DOI: 10.3390/pathogens11070759] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 06/29/2022] [Accepted: 06/30/2022] [Indexed: 01/27/2023] Open
Abstract
A voluntary biosurveillance program was established in 2008 in order to determine the shedding frequency and prevalence factors for common respiratory pathogens associated with acute onset of fever and/or respiratory signs in equids from the USA. Over a period of 13 years, a total of 10,296 equids were enrolled in the program and nasal secretions were analyzed for the qPCR detection of equine influenza virus (EIV), equine herpesvirus-1 (EHV-1), EHV-4, equine rhinitis A and B virus (ERVs), and Streptococcus equi subspecies equi (S. equi). Single infections with respiratory pathogens were detected in 21.1% of the submissions with EIV (6.8%) and EHV-4 (6.6%) as the two most prevalent viruses, followed by S. equi (4.7%), ERVs (2.3%), and EHV-1 (0.7%). Multiple pathogens were detected in 274 horses (2.7%) and no respiratory pathogens in 7836 horses (76.2%). Specific prevalence factors were determined for each of the six respiratory pathogen groups; most differences were associated with age, breed, and use of the horses, while the clinical signs were fairly consistent between viral and bacterial respiratory infections. Monitoring the frequency of detection of common respiratory pathogens is important in order to gain a better understanding of their epidemiology and to implement management practices aimed at controlling disease spread.
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Equine Influenza Virus and Vaccines. Viruses 2021; 13:v13081657. [PMID: 34452521 PMCID: PMC8402878 DOI: 10.3390/v13081657] [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: 06/30/2021] [Revised: 07/27/2021] [Accepted: 07/28/2021] [Indexed: 01/01/2023] Open
Abstract
Equine influenza virus (EIV) is a constantly evolving viral pathogen that is responsible for yearly outbreaks of respiratory disease in horses termed equine influenza (EI). There is currently no evidence of circulation of the original H7N7 strain of EIV worldwide; however, the EIV H3N8 strain, which was first isolated in the early 1960s, remains a major threat to most of the world's horse populations. It can also infect dogs. The ability of EIV to constantly accumulate mutations in its antibody-binding sites enables it to evade host protective immunity, making it a successful viral pathogen. Clinical and virological protection against EIV is achieved by stimulation of strong cellular and humoral immunity in vaccinated horses. However, despite EI vaccine updates over the years, EIV remains relevant, because the protective effects of vaccines decay and permit subclinical infections that facilitate transmission into susceptible populations. In this review, we describe how the evolution of EIV drives repeated EI outbreaks even in horse populations with supposedly high vaccination coverage. Next, we discuss the approaches employed to develop efficacious EI vaccines for commercial use and the existing system for recommendations on updating vaccines based on available clinical and virological data to improve protective immunity in vaccinated horse populations. Understanding how EIV biology can be better harnessed to improve EI vaccines is central to controlling EI.
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Olguin-Perglione C, Barrandeguy ME. An Overview of Equine Influenza in South America. Viruses 2021; 13:v13050888. [PMID: 34065839 PMCID: PMC8151294 DOI: 10.3390/v13050888] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 05/08/2021] [Accepted: 05/10/2021] [Indexed: 12/11/2022] Open
Abstract
Equine influenza virus (EIV) is one of the most important respiratory pathogens of horses as outbreaks of the disease lead to significant economic losses worldwide. In this review, we summarize the information available on equine influenza (EI) in South America. In the region, the major events of EI occurred almost in the same period in the different countries, and the EIV isolated showed high genetic identity at the hemagglutinin gene level. It is highly likely that the continuous movement of horses, some of them subclinically infected, among South American countries, facilitated the spread of the virus. Although EI vaccination is mandatory for mobile or congregates equine populations in the region, EI outbreaks continuously threaten the equine industry. Vaccine breakdown could be related to the fact that many of the commercial vaccines available in the region contain out-of-date EIV strains, and some of them even lack reliable information about immunogenicity and efficacy. This review highlights the importance of disease surveillance and reinforces the need to harmonize quarantine and biosecurity protocols, and encourage vaccine manufacturer companies to carry out quality control procedures and update the EIV strains in their products.
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Affiliation(s)
- Cecilia Olguin-Perglione
- Instituto de Virología CICVyA, Instituto Nacional de Tecnología Agropecuaria (INTA), Hurlingham B1686, Argentina;
- Correspondence: ; Tel.: +54-11-4621-1447 (ext. 3368)
| | - María Edith Barrandeguy
- Instituto de Virología CICVyA, Instituto Nacional de Tecnología Agropecuaria (INTA), Hurlingham B1686, Argentina;
- Escuela de Veterinaria, Facultad de Ciencias Agrarias y Veterinarias, Universidad del Salvador, Pilar B1630AHU, Argentina
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Nemoto M, Ohta M, Yamanaka T, Kambayashi Y, Bannai H, Tsujimura K, Yamayoshi S, Kawaoka Y, Cullinane A. Antigenic differences between equine influenza virus vaccine strains and Florida sublineage clade 1 strains isolated in Europe in 2019. Vet J 2021; 272:105674. [PMID: 33941332 DOI: 10.1016/j.tvjl.2021.105674] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2020] [Revised: 04/05/2021] [Accepted: 04/07/2021] [Indexed: 01/10/2023]
Abstract
From late 2018 to 2019, equine influenza virus (EIV) strains of Florida sublineage clade 1 (Fc1), which had until then been circulating mainly in the United States, suddenly spread across Europe causing many outbreaks, and Florida sublineage clade 2 (Fc2) strains, which had been circulating mainly in Europe, have not been detected in Europe since 2018. Since 2010, the World Organisation for Animal Health (OIE) has recommended that EIV vaccines contain an Fc1 strain that is like A/equine/South Africa/4/2003 or A/equine/Ohio/2003. Accordingly, Japanese vaccines contain A/equine/Ibaraki/1/2007 as the Fc1 strain. To evaluate the effectiveness of these vaccines against the Fc1 strains detected in Europe in 2019, we performed virus neutralization tests using horse antisera. Challenge viruses used were Irish strain A/equine/Tipperary/1/2019 and two recombinant viruses generated by reverse genetics. Recombinant viruses possessing hemagglutinin (HA) and neuraminidase (NA) derived from A/equine/Tipperary/1/2019 (rA/equine/Tipperary/1/2019) or British strain A/equine/Essex/1/2019 (rA/equine/Essex/1/2019) were generated. Equine antisera against A/equine/South Africa/2003 and A/equine/Ibaraki/2007 were produced by experimental infection. Antibody titers against A/equine/Tipperary/1/2019, rA/equine/Tipperary/1/2019, and rA/equine/Essex/1/2019 were 2.5- to 6.3-fold lower than those against the homologous vaccine strains A/equine/South Africa/4/2003 or A/equine/Ibaraki/2007. These results suggest that the ongoing evolution of the Fc1 viruses may impact on antigenicity and although antibodies against current vaccine strains neutralize the 2019 strains, ongoing surveillance is essential for optimum choice of candidate vaccine strains.
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Affiliation(s)
- Manabu Nemoto
- Equine Research Institute, Japan Racing Association, 1400-4 Shiba, Shimotsuke, Tochigi 329-0412, Japan.
| | - Minoru Ohta
- Equine Research Institute, Japan Racing Association, 1400-4 Shiba, Shimotsuke, Tochigi 329-0412, Japan
| | - Takashi Yamanaka
- Equine Research Institute, Japan Racing Association, 1400-4 Shiba, Shimotsuke, Tochigi 329-0412, Japan
| | - Yoshinori Kambayashi
- Equine Research Institute, Japan Racing Association, 1400-4 Shiba, Shimotsuke, Tochigi 329-0412, Japan
| | - Hiroshi Bannai
- Equine Research Institute, Japan Racing Association, 1400-4 Shiba, Shimotsuke, Tochigi 329-0412, Japan
| | - Koji Tsujimura
- Equine Research Institute, Japan Racing Association, 1400-4 Shiba, Shimotsuke, Tochigi 329-0412, Japan
| | - Seiya Yamayoshi
- Division of Virology, Department of Microbiology and Immunology, Institute of Medical Science, University of Tokyo, 4-6-1, Shirokanedai, Minato-ku, Tokyo, 108-8639, Japan
| | - Yoshihiro Kawaoka
- Division of Virology, Department of Microbiology and Immunology, Institute of Medical Science, University of Tokyo, 4-6-1, Shirokanedai, Minato-ku, Tokyo, 108-8639, Japan
| | - Ann Cullinane
- Virology Unit, Irish Equine Centre, Naas, Co. Kildare, W91 RH93 Johnstown, Ireland
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Protection against the New Equine Influenza Virus Florida Clade I Outbreak Strain Provided by a Whole Inactivated Virus Vaccine. Vaccines (Basel) 2020; 8:vaccines8040784. [PMID: 33371484 PMCID: PMC7767483 DOI: 10.3390/vaccines8040784] [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: 11/24/2020] [Revised: 12/14/2020] [Accepted: 12/18/2020] [Indexed: 12/20/2022] Open
Abstract
Equine influenza virus (EIV) is a major cause of respiratory disease in horses. Vaccination is an effective tool for infection control. Although various EIV vaccines are widely available, major outbreaks occurred in Europe in 2018 involving a new EIV H3N8 FC1 strain. In France, it was reported that both unvaccinated and vaccinated horses were affected despite >80% vaccination coverage and most horses being vaccinated with a vaccine expressing FC1 antigen. This study assessed whether vaccine type, next to antigenic difference between vaccine and field strain, plays a role. Horses were vaccinated with an ISCOMatrix-adjuvanted, whole inactivated virus vaccine (Equilis Prequenza) and experimentally infected with the new FC1 outbreak strain. Serology (HI), clinical signs, and virus shedding were evaluated in vaccinated compared to unvaccinated horses. Results showed a significant reduction in clinical signs and a lack of virus shedding in vaccinated horses compared to unvaccinated controls. From these results, it can be concluded that Equilis Prequenza provides a high level of protection to challenge with the new FC1 outbreak strain. This suggests that, apart from antigenic differences between vaccine and field strain, other aspects of the vaccine may also play an important role in determining field efficacy.
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Wilson A, Pinchbeck G, Dean R, McGowan C. Equine influenza vaccination in the UK: Current practices may leave horses with suboptimal immunity. Equine Vet J 2020; 53:1004-1014. [PMID: 33124070 PMCID: PMC8451788 DOI: 10.1111/evj.13377] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 09/26/2020] [Accepted: 10/22/2020] [Indexed: 11/30/2022]
Abstract
BACKGROUND Vaccination is integral to preventive healthcare. Despite numerous guidelines on equine vaccination, evidence of current vaccination practices is lacking. OBJECTIVES To describe current vaccination practices advised by vets treating horses in the United Kingdom (UK) and compare practices with manufacturer datasheets and current guidelines. STUDY DESIGN Cross-sectional survey. METHODS An online questionnaire was distributed using email addresses acquired through professional registration listings and social media, targeting vets who treat horses in the UK. The questionnaire collected demographic data and information regarding vaccination practices and vaccine hesitancy. Descriptive statistical analysis was performed. RESULTS Questionnaires were completed by 304 UK vets working with horses used for leisure (97.4%, n = 296/304), competition (86.2%, n = 262/304), stud-work (47.7%, n = 145/304) and racing (40.5%, n = 123/304). Variation was identified in vaccine protocols for competition and noncompetition horses. Fifty-seven per cent (n = 170/298) of respondents reported variation in advised 'booster' frequency; most commonly (n = 118) advising a 6-monthly vaccination in competition horses and annual vaccination in noncompetition horses. Most common vaccination guidelines volunteered were British Horseracing Authority (68.8%, n = 172/250) and Federation Equestre Internationale (66.4%, n = 166/250). Most vaccination practices were not consistent with datasheet guidance. Only 7.7% (n = 23/300) of respondents complied with datasheet timeframes between the second and third vaccination. Adverse events following vaccination in the previous year were encountered by 66% (n = 199/304) of respondents, representing 2760 adverse events; but only 526 (19.1%) cases were reported to the Veterinary Medicines Directorate. Most common reactions were transient, including stiffness (931), localised swelling (835), lethargy (559) and pyrexia (355). 86.4% respondents reported vaccine hesitancy from horse owners, most commonly due to perception of over-vaccination, cost and concern regarding adverse events. MAIN LIMITATIONS Potential selection, respondent and recall bias. The recent Equine Influenza (EI) and Equine Herpes Virus (EHV) outbreaks in the UK may have altered responses. CONCLUSIONS Current equine vaccination practices, although complying with competition rules, are mostly noncompliant with datasheet guidelines, potentially risking suboptimal immunity.
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Affiliation(s)
- Amie Wilson
- Department of Equine Clinical Science, Institute of Veterinary and Ecological Sciences, University of Liverpool, Neston, Cheshire, UK
| | - Gina Pinchbeck
- Department of Equine Clinical Science, Institute of Veterinary and Ecological Sciences, University of Liverpool, Neston, Cheshire, UK
| | | | - Catherine McGowan
- Department of Equine Clinical Science, Institute of Veterinary and Ecological Sciences, University of Liverpool, Neston, Cheshire, UK
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Diallo AA, Souley MM, Issa Ibrahim A, Alassane A, Issa R, Gagara H, Yaou B, Issiakou A, Diop M, Ba Diouf RO, Lo FT, Lo MM, Bakhoum T, Sylla M, Seck MT, Meseko C, Shittu I, Cullinane A, Settypalli TBK, Lamien CE, Dundon WG, Cattoli G. Transboundary spread of equine influenza viruses (H3N8) in West and Central Africa: Molecular characterization of identified viruses during outbreaks in Niger and Senegal, in 2019. Transbound Emerg Dis 2020; 68:1253-1262. [PMID: 32770642 DOI: 10.1111/tbed.13779] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 07/13/2020] [Accepted: 08/04/2020] [Indexed: 12/17/2022]
Abstract
Since November 2018, several countries in West and Central Africa have reported mortalities in donkeys and horses. Specifically, more than 66,000 horses and donkeys have succumbed to disease in Burkina Faso, Chad, Cameroon, The Gambia, Ghana, Mali, Niger, Nigeria, and Senegal. Strangles caused by Streptococcus equi subsp equi, African Horse Sickness (AHS) virus, and Equine influenza virus (EIV) were all suspected as potential causative agents. This study reports the identification of EIV in field samples collected in Niger and Senegal. Phylogenetic analysis of the hemagglutinin and neuraminidase genes revealed that the identified viruses belonged to clade 1 of the Florida sublineage and were very similar to viruses identified in Nigeria in 2019. Interestingly, they were also more similar to EIVs from recent outbreaks in South America than to those in Europe and the USA. This is one of the first reports providing detailed description and characterization of EIVs in West and Central Africa region.
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Affiliation(s)
- Alpha Amadou Diallo
- Laboratoire National de l'Elevage et de Recherches Vétérinaires ISRA/LNERV(LNERV), Dakar, Sénégal
| | | | | | - Abdou Alassane
- Laboratoire Central de l'Elevage (LABOCEL), Niamey, Niger
| | - Rahila Issa
- Laboratoire Central de l'Elevage (LABOCEL), Niamey, Niger
| | - Haladou Gagara
- Laboratoire Central de l'Elevage (LABOCEL), Niamey, Niger
| | - Bachir Yaou
- Laboratoire Central de l'Elevage (LABOCEL), Niamey, Niger
| | - Abdou Issiakou
- Direction Générale des Services Vétérinaires du Niger, Niamey, Niger
| | - Mariame Diop
- Laboratoire National de l'Elevage et de Recherches Vétérinaires ISRA/LNERV(LNERV), Dakar, Sénégal
| | - Racky Oumar Ba Diouf
- Laboratoire National de l'Elevage et de Recherches Vétérinaires ISRA/LNERV(LNERV), Dakar, Sénégal
| | - Fatou Tall Lo
- Laboratoire National de l'Elevage et de Recherches Vétérinaires ISRA/LNERV(LNERV), Dakar, Sénégal
| | - Modou Moustapha Lo
- Laboratoire National de l'Elevage et de Recherches Vétérinaires ISRA/LNERV(LNERV), Dakar, Sénégal
| | - Thierno Bakhoum
- Laboratoire National de l'Elevage et de Recherches Vétérinaires ISRA/LNERV(LNERV), Dakar, Sénégal
| | - Mamadou Sylla
- Laboratoire National de l'Elevage et de Recherches Vétérinaires ISRA/LNERV(LNERV), Dakar, Sénégal.,Direction du Développement des Equidés, MEPA, Dakar, Sénégal
| | - Momar Talla Seck
- Laboratoire National de l'Elevage et de Recherches Vétérinaires ISRA/LNERV(LNERV), Dakar, Sénégal
| | - Clement Meseko
- National Veterinary Research Institute, Vom, Plateau State, Nigeria
| | - Ismaila Shittu
- National Veterinary Research Institute, Vom, Plateau State, Nigeria
| | - Ann Cullinane
- OIE Reference Laboratory for Equine influenza, Irish Equine Centre, Kildare, Ireland
| | - Tirumala B K Settypalli
- Animal Production and Health Laboratory, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Department of Nuclear Sciences and Applications, International Atomic Energy Agency, Vienna, Austria
| | - Charles E Lamien
- Animal Production and Health Laboratory, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Department of Nuclear Sciences and Applications, International Atomic Energy Agency, Vienna, Austria
| | - William G Dundon
- Animal Production and Health Laboratory, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Department of Nuclear Sciences and Applications, International Atomic Energy Agency, Vienna, Austria
| | - Giovanni Cattoli
- Animal Production and Health Laboratory, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Department of Nuclear Sciences and Applications, International Atomic Energy Agency, Vienna, Austria
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12
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Cullinane A, Gahan J, Walsh C, Nemoto M, Entenfellner J, Olguin-Perglione C, Garvey M, Huang Fu TQ, Venner M, Yamanaka T, Barrandeguy M, Fernandez CJ. Evaluation of Current Equine Influenza Vaccination Protocols Prior to Shipment, Guided by OIE Standards. Vaccines (Basel) 2020; 8:E107. [PMID: 32121419 PMCID: PMC7157717 DOI: 10.3390/vaccines8010107] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 02/21/2020] [Accepted: 02/24/2020] [Indexed: 01/28/2023] Open
Abstract
To facilitate the temporary importation of horses for competition and racing purposes, with a minimum risk of transmitting equine influenza, the World Organisation for Animal Health (Office International des Epizooties, or OIE), formally engaged in a public-private partnership with the Federation Equestre Internationale (FEI) and the International Federation for Horseracing Authorities (IFHA) to establish, within the context of existing OIE standards, a science-based rationale to identify the ideal time period for equine influenza vaccination prior to shipment. Field trials using vaccines based on different technologies were carried out on three continents. The antibody response post-booster vaccination at intervals aligned with the different rules/recommendations of the OIE, FEI, and IFHA, was monitored by single radial haemolysis. It was determined that 14 days was the optimum period necessary to allow horses adequate time to respond to booster vaccination and for horses that have previously received four or more doses of vaccine and are older than four years, it is adequate to allow vaccination within 180 days of shipment. In contrast, the results indicate that there is a potential benefit to younger (four years old or younger) horses in requiring booster vaccination within 90 days of shipment, consistent with the current OIE standard.
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Affiliation(s)
- Ann Cullinane
- Virology Unit, The Irish Equine Centre, Naas, Co. Kildare, W91 RH93 Johnstown, Ireland; (J.G.); (M.N.); (M.G.)
| | - Jacinta Gahan
- Virology Unit, The Irish Equine Centre, Naas, Co. Kildare, W91 RH93 Johnstown, Ireland; (J.G.); (M.N.); (M.G.)
| | - Cathal Walsh
- Department of Mathematics and Statistics, University of Limerick, V94 T9PX Limerick, Ireland;
| | - Manabu Nemoto
- Virology Unit, The Irish Equine Centre, Naas, Co. Kildare, W91 RH93 Johnstown, Ireland; (J.G.); (M.N.); (M.G.)
- Equine Research Institute, the Japan Racing Association, 1400-4 Shiba, Shimotsuke, Tochigi 329-0412, Japan;
| | - Johanna Entenfellner
- Equine Clinic, School of Veterinary Medicine, Bischofsholer Damm 15, 30173 Hannover, Germany;
| | - Cecilia Olguin-Perglione
- Instituto Nacional de Tecnología Agropecuaria (INTA), Instituto de Virología, De Los Reseros y Dr. Nicolás Repetto S/N, Hurlingham, Buenos Aires B1686IGC, Argentina;
| | - Marie Garvey
- Virology Unit, The Irish Equine Centre, Naas, Co. Kildare, W91 RH93 Johnstown, Ireland; (J.G.); (M.N.); (M.G.)
| | - Tao Qi Huang Fu
- Centre for Animal and Veterinary Sciences, Professional and Scientific Services, Animal and Veterinary Service, National Parks Board, 1 Cluny Road, Singapore 259569, Singapore; (T.Q.H.F.); (C.J.F.)
| | - Monica Venner
- Pferdeklinik Destedt GmbH, Destedt, Trift 4, 38162 Cremlingen, Germany;
| | - Takashi Yamanaka
- Equine Research Institute, the Japan Racing Association, 1400-4 Shiba, Shimotsuke, Tochigi 329-0412, Japan;
| | - María Barrandeguy
- Escuela de Veterinaria, Universidad del Salvador, Champagnat 1599, Ruta Panamericana km 54.5 Pilar, Buenos Aires B1630AHU, Argentina;
| | - Charlene Judith Fernandez
- Centre for Animal and Veterinary Sciences, Professional and Scientific Services, Animal and Veterinary Service, National Parks Board, 1 Cluny Road, Singapore 259569, Singapore; (T.Q.H.F.); (C.J.F.)
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