Replication and immunogenicity of swine, equine, and avian h3 subtype influenza viruses in mice and ferrets.
Abstract: Since it is difficult to predict which influenza virus subtype will cause an influenza pandemic, it is important to prepare influenza virus vaccines against different subtypes and evaluate the safety and immunogenicity of candidate vaccines in preclinical and clinical studies prior to a pandemic. In addition to infecting humans, H3 influenza viruses commonly infect pigs, horses, and avian species. We selected 11 swine, equine, and avian H3 influenza viruses and evaluated their kinetics of replication and ability to induce a broadly cross-reactive antibody response in mice and ferrets. The swine and equine viruses replicated well in the upper respiratory tract of mice. With the exception of one avian virus that replicated poorly in the lower respiratory tract, all of the viruses replicated in mouse lungs. In ferrets, all of the viruses replicated well in the upper respiratory tract, but the equine viruses replicated poorly in the lungs. Extrapulmonary spread was not observed in either mice or ferrets. No single virus elicited antibodies that cross-reacted with viruses from all three animal sources. Avian and equine H3 viruses elicited broadly cross-reactive antibodies against heterologous viruses isolated from the same or other species, but the swine viruses did not. We selected an equine and an avian H3 influenza virus for further development as vaccines.
Publication Date: 2013-04-10 PubMed ID: 23576512PubMed Central: PMC3676140DOI: 10.1128/JVI.03520-12Google Scholar: Lookup
The Equine Research Bank provides access to a large database of publicly available scientific literature. Inclusion in the Research Bank does not imply endorsement of study methods or findings by Mad Barn.
- Journal Article
- Research Support
- N.I.H.
- Intramural
Summary
This research summary has been generated with artificial intelligence and may contain errors and omissions. Refer to the original study to confirm details provided. Submit correction.
The study involves the analysis of 11 H3 influenza viruses from different species— swine, equine, and avian— to understand their replication ability and efficiency to develop a cross-reactive antibody response in mice and ferrets.
Selection and Testing of Influenza Virus Subtypes
- The researchers selected H3 influenza viruses, a common virus type that not only affects humans but also swine, horses, and birds. A total of 11 swine, equine, and avian H3 influenza viruses were chosen for the research.
- The chosen viruses were evaluated on the parameters of their replication tendencies and their capabilities to trigger a widespread cross-reactive antibody response in mice and ferrets. The aim was to understand the behavior and replication tendency of these non-human viruses within the mentioned animal models.
Evaluation of Virus Replication in Mice and Ferrets
- The swine and equine viruses showed efficient replication in the upper respiratory tract of mice.
- All the viruses, barring one avian type, replicated well in the lungs of the mice.
- All selected viruses were able to replicate within the upper respiratory tract of ferrets. However, the equine viruses struggled to replicate within the lungs of ferrets.
- Extrapulmonary spread of viruses, which is their spreading to parts of the body outside the lungs, was not observed in either mice or ferrets.
Antibody Response and Cross-Reactivity
- The study found no single virus that could induce an antibody response cross-reactive with viruses from all three animal sources (swine, equine, and avian).
- Avian and equine H3 viruses were able to generate broadly cross-reactive antibodies against various viruses sourced from the same or different species. However, swine viruses were unable to prompt a similar result. It indicates that swine viruses might be incapable of broadening cross-reactive antibody possibility.
Selection for Further Vaccine Development
- In light of the findings, the researchers selected one avian and one equine virus respectively, as they showed potential of inducing broad cross-reactive antibodies. These selected viruses will be looked at for further development as components in a potentially universal influenza vaccine.
The study deepens the understanding of how influenza viruses from different species behave and respond to antibody generation in mammals. This research is crucial in developing broad-spectrum vaccines since it’s challenging to predict which influenza subtype might cause a future pandemic.
Cite This Article
APA
Baz M, Paskel M, Matsuoka Y, Zengel J, Cheng X, Jin H, Subbarao K.
(2013).
Replication and immunogenicity of swine, equine, and avian h3 subtype influenza viruses in mice and ferrets.
J Virol, 87(12), 6901-6910.
https://doi.org/10.1128/JVI.03520-12 Publication
Researcher Affiliations
- Laboratory of Infectious Diseases, NIAID, NIH, Bethesda, Maryland, USA.
MeSH Terms
- Animals
- Antibodies, Neutralizing / blood
- Antibodies, Neutralizing / immunology
- Antibodies, Viral / blood
- Antibodies, Viral / immunology
- Birds / virology
- Cross Reactions
- Female
- Ferrets / immunology
- Ferrets / virology
- Horses / virology
- Influenza A virus / classification
- Influenza A virus / immunology
- Influenza A virus / physiology
- Mice / immunology
- Mice / virology
- Mice, Inbred BALB C
- Neutralization Tests
- Orthomyxoviridae Infections / immunology
- Orthomyxoviridae Infections / mortality
- Orthomyxoviridae Infections / virology
- Swine / virology
- Virus Replication
Grant Funding
- Intramural NIH HHS
References
This article includes 59 references
- Fouchier RA, Munster V, Wallensten A, Bestebroer TM, Herfst S, Smith D, Rimmelzwaan GF, Olsen B, Osterhaus AD. Characterization of a novel influenza A virus hemagglutinin subtype (H16) obtained from black-headed gulls.. J Virol 2005 Mar;79(5):2814-22.
- Palese P, Shaw M. Orthomyxoviridae: the viruses and their replication. p 1647–1689 In Knipe DM, Howley PM, Griffin DE, Lamb RA, Martin MA, Roizman B, Straus SE. (ed), Fields virology, 5th ed, vol 2 Lippincott Williams & Wilkins, Philadelphia, PA.
- Wright P, Neumann G, Kawaoka Y. Orthomyxoviruses. p 1691–1740 In Knipe DM, Howley PM, Griffin DE, Lamb RA, Martin MA, Roizman B, Straus SE. (ed), Fields virology, 5th ed, vol 2 Lippincott Williams & Wilkins, Philadelphia, PA.
- Tong S, Li Y, Rivailler P, Conrardy C, Castillo DA, Chen LM, Recuenco S, Ellison JA, Davis CT, York IA, Turmelle AS, Moran D, Rogers S, Shi M, Tao Y, Weil MR, Tang K, Rowe LA, Sammons S, Xu X, Frace M, Lindblade KA, Cox NJ, Anderson LJ, Rupprecht CE, Donis RO. A distinct lineage of influenza A virus from bats.. Proc Natl Acad Sci U S A 2012 Mar 13;109(11):4269-74.
- Cox NJ, Subbarao K. Global epidemiology of influenza: past and present.. Annu Rev Med 2000;51:407-21.
- Kilbourne ED. Influenza pandemics in perspective.. JAMA 1977 Mar 21;237(12):1225-8.
- Dawood FS, Jain S, Finelli L, Shaw MW, Lindstrom S, Garten RJ, Gubareva LV, Xu X, Bridges CB, Uyeki TM. Emergence of a novel swine-origin influenza A (H1N1) virus in humans.. N Engl J Med 2009 Jun 18;360(25):2605-15.
- Taubenberger JK, Reid AH, Lourens RM, Wang R, Jin G, Fanning TG. Characterization of the 1918 influenza virus polymerase genes.. Nature 2005 Oct 6;437(7060):889-93.
- Kawaoka Y, Krauss S, Webster RG. Avian-to-human transmission of the PB1 gene of influenza A viruses in the 1957 and 1968 pandemics.. J Virol 1989 Nov;63(11):4603-8.
- Schäfer JR, Kawaoka Y, Bean WJ, Süss J, Senne D, Webster RG. Origin of the pandemic 1957 H2 influenza A virus and the persistence of its possible progenitors in the avian reservoir.. Virology 1993 Jun;194(2):781-8.
- Anthony SJ, St Leger JA, Pugliares K, Ip HS, Chan JM, Carpenter ZW, Navarrete-Macias I, Sanchez-Leon M, Saliki JT, Pedersen J, Karesh W, Daszak P, Rabadan R, Rowles T, Lipkin WI. Emergence of fatal avian influenza in New England harbor seals.. mBio 2012;3(4):e00166-12.
- Callan RJ, Early G, Kida H, Hinshaw VS. The appearance of H3 influenza viruses in seals.. J Gen Virol 1995 Jan;76 ( Pt 1):199-203.
- Castrucci MR, Campitelli L, Ruggieri A, Barigazzi G, Sidoli L, Daniels R, Oxford JS, Donatelli I. Antigenic and sequence analysis of H3 influenza virus haemagglutinins from pigs in Italy.. J Gen Virol 1994 Feb;75 ( Pt 2):371-9.
- Paniker CK, Nair CM. Experimental infection of animals with influenzavirus types A and B.. Bull World Health Organ 1972;47(4):461-3.
- Said AW, Usui T, Shinya K, Ono E, Ito T, Hikasa Y, Matsuu A, Takeuchi T, Sugiyama A, Nishii N, Yamaguchi T. A sero-survey of subtype H3 influenza A virus infection in dogs and cats in Japan.. J Vet Med Sci 2011 Apr;73(4):541-4.
- Song D, Kang B, Lee C, Jung K, Ha G, Kang D, Park S, Park B, Oh J. Transmission of avian influenza virus (H3N2) to dogs.. Emerg Infect Dis 2008 May;14(5):741-6.
- WADDELL GH, TEIGLAND MB, SIGEL MM. A NEW INFLUENZA VIRUS ASSOCIATED WITH EQUINE RESPIRATORY DISEASE.. J Am Vet Med Assoc 1963 Sep 15;143:587-90.
- Yamanaka T, Nemoto M, Bannai H, Tsujimura K, Kondo T, Matsumura T, Muranaka M, Ueno T, Kinoshita Y, Niwa H, Hidari KI, Suzuki T. No evidence of horizontal infection in horses kept in close contact with dogs experimentally infected with canine influenza A virus (H3N8).. Acta Vet Scand 2012 Apr 16;54(1):25.
- Zhou NN, Senne DA, Landgraf JS, Swenson SL, Erickson G, Rossow K, Liu L, Yoon Kj, Krauss S, Webster RG. Genetic reassortment of avian, swine, and human influenza A viruses in American pigs.. J Virol 1999 Oct;73(10):8851-6.
- Webby RJ, Swenson SL, Krauss SL, Gerrish PJ, Goyal SM, Webster RG. Evolution of swine H3N2 influenza viruses in the United States.. J Virol 2000 Sep;74(18):8243-51.
- Gaydos JC, Hodder RA, Top FH Jr, Soden VJ, Allen RG, Bartley JD, Zabkar JH, Nowosiwsky T, Russell PK. Swine influenza A at Fort Dix, New Jersey (January-February 1976). I. Case finding and clinical study of cases.. J Infect Dis 1977 Dec;136 Suppl:S356-62.
- Myers KP, Olsen CW, Gray GC. Cases of swine influenza in humans: a review of the literature.. Clin Infect Dis 2007 Apr 15;44(8):1084-8.
- Newman AP, Reisdorf E, Beinemann J, Uyeki TM, Balish A, Shu B, Lindstrom S, Achenbach J, Smith C, Davis JP. Human case of swine influenza A (H1N1) triple reassortant virus infection, Wisconsin.. Emerg Infect Dis 2008 Sep;14(9):1470-2.
- Shinde V, Bridges CB, Uyeki TM, Shu B, Balish A, Xu X, Lindstrom S, Gubareva LV, Deyde V, Garten RJ, Harris M, Gerber S, Vagasky S, Smith F, Pascoe N, Martin K, Dufficy D, Ritger K, Conover C, Quinlisk P, Klimov A, Bresee JS, Finelli L. Triple-reassortant swine influenza A (H1) in humans in the United States, 2005-2009.. N Engl J Med 2009 Jun 18;360(25):2616-25.
- Wentworth DE, Thompson BL, Xu X, Regnery HL, Cooley AJ, McGregor MW, Cox NJ, Hinshaw VS. An influenza A (H1N1) virus, closely related to swine influenza virus, responsible for a fatal case of human influenza.. J Virol 1994 Apr;68(4):2051-8.
- Cox CM, Neises D, Garten RJ, Bryant B, Hesse RA, Anderson GA, Trevino-Garrison I, Shu B, Lindstrom S, Klimov AI, Finelli L. Swine influenza virus A (H3N2) infection in human, Kansas, USA, 2009.. Emerg Infect Dis 2011 Jun;17(6):1143-4.
- Shu B, Garten R, Emery S, Balish A, Cooper L, Sessions W, Deyde V, Smith C, Berman L, Klimov A, Lindstrom S, Xu X. Genetic analysis and antigenic characterization of swine origin influenza viruses isolated from humans in the United States, 1990-2010.. Virology 2012 Jan 5;422(1):151-60.
- . Antigenic and genetic characteristics of influenza A(H5N1) and influenza A(H9N2) viruses and candidate vaccine viruses developed for potential use in human vaccines - February 2010.. Wkly Epidemiol Rec 2010 Mar 12;85(11):100-7.
- . Swine-origin influenza A (H3N2) virus infection in two children--Indiana and Pennsylvania, July-August 2011.. MMWR Morb Mortal Wkly Rep 2011 Sep 9;60(35):1213-5.
- Lakdawala SS, Lamirande EW, Suguitan AL Jr, Wang W, Santos CP, Vogel L, Matsuoka Y, Lindsley WG, Jin H, Subbarao K. Eurasian-origin gene segments contribute to the transmissibility, aerosol release, and morphology of the 2009 pandemic H1N1 influenza virus.. PLoS Pathog 2011 Dec;7(12):e1002443.
- . Evaluation of rapid influenza diagnostic tests for influenza A (H3N2)v virus and updated case count--United States, 2012.. MMWR Morb Mortal Wkly Rep 2012 Aug 17;61(32):619-21.
- . Limited human-to-human transmission of novel influenza A (H3N2) virus--Iowa, November 2011.. MMWR Morb Mortal Wkly Rep 2011 Dec 2;60(47):1615-7.
- Paillot R, Hannant D, Kydd JH, Daly JM. Vaccination against equine influenza: quid novi?. Vaccine 2006 May 8;24(19):4047-61.
- Crawford PC, Dubovi EJ, Castleman WL, Stephenson I, Gibbs EP, Chen L, Smith C, Hill RC, Ferro P, Pompey J, Bright RA, Medina MJ, Johnson CM, Olsen CW, Cox NJ, Klimov AI, Katz JM, Donis RO. Transmission of equine influenza virus to dogs.. Science 2005 Oct 21;310(5747):482-5.
- Anderson TC, Bromfield CR, Crawford PC, Dodds WJ, Gibbs EP, Hernandez JA. Serological evidence of H3N8 canine influenza-like virus circulation in USA dogs prior to 2004.. Vet J 2012 Mar;191(3):312-6.
- Payungporn S, Crawford PC, Kouo TS, Chen LM, Pompey J, Castleman WL, Dubovi EJ, Katz JM, Donis RO. Influenza A virus (H3N8) in dogs with respiratory disease, Florida.. Emerg Infect Dis 2008 Jun;14(6):902-8.
- Crispe E, Finlaison DS, Hurt AC, Kirkland PD. Infection of dogs with equine influenza virus: evidence for transmission from horses during the Australian outbreak.. Aust Vet J 2011 Jul;89 Suppl 1:27-8.
- Daly JM, Blunden AS, Macrae S, Miller J, Bowman SJ, Kolodziejek J, Nowotny N, Smith KC. Transmission of equine influenza virus to English foxhounds.. Emerg Infect Dis 2008 Mar;14(3):461-4.
- Kirkland PD, Finlaison DS, Crispe E, Hurt AC. Influenza virus transmission from horses to dogs, Australia.. Emerg Infect Dis 2010 Apr;16(4):699-702.
- Tu J, Zhou H, Jiang T, Li C, Zhang A, Guo X, Zou W, Chen H, Jin M. Isolation and molecular characterization of equine H3N8 influenza viruses from pigs in China.. Arch Virol 2009;154(5):887-90.
- Alford RH, Kasel JA, Lehrich JR, Knight V. Human responses to experimental infection with influenza A/Equi 2 virus.. Am J Epidemiol 1967 Jul;86(1):185-92.
- KASEL JA, ALFORD RH, KNIGHT V, WADDELL GH, SIGEL MM. EXPERIMENTAL INFECTION OF HUMAN VOLUNTEERS WITH EQUINE INFLUENZA VIRUS.. Nature 1965 Apr 3;206:41-3.
- Kasel JA, Couch RB. Experimental infection in man and horses with influenza A viruses.. Bull World Health Organ 1969;41(3):447-52.
- Alexander DJ. A review of avian influenza in different bird species.. Vet Microbiol 2000 May 22;74(1-2):3-13.
- Choi YK, Seo SH, Kim JA, Webby RJ, Webster RG. Avian influenza viruses in Korean live poultry markets and their pathogenic potential.. Virology 2005 Feb 20;332(2):529-37.
- Chen GL, Lamirande EW, Yang CF, Jin H, Kemble G, Subbarao K. Evaluation of replication and cross-reactive antibody responses of H2 subtype influenza viruses in mice and ferrets.. J Virol 2010 Aug;84(15):7695-702.
- Gillim-Ross L, Santos C, Chen Z, Aspelund A, Yang CF, Ye D, Jin H, Kemble G, Subbarao K. Avian influenza h6 viruses productively infect and cause illness in mice and ferrets.. J Virol 2008 Nov;82(21):10854-63.
- Joseph T, McAuliffe J, Lu B, Jin H, Kemble G, Subbarao K. Evaluation of replication and pathogenicity of avian influenza a H7 subtype viruses in a mouse model.. J Virol 2007 Oct;81(19):10558-66.
- Daly JM, MacRae S, Newton JR, Wattrang E, Elton DM. Equine influenza: a review of an unpredictable virus.. Vet J 2011 Jul;189(1):7-14.
- Reed LJ, Muench H. A simple method of estimating fifty percent endpoints. Am. J. Hyg. (London) 27:493–497.
- . nWHO manual on animal influenza diagnosis and surveillance. WHO, Geneva, Switzerland.
- Kawaoka Y, Bordwell E, Webster RG. Intestinal replication of influenza A viruses in two mammalian species. Brief report.. Arch Virol 1987;93(3-4):303-8.
- Muranaka M, Yamanaka T, Katayama Y, Hidari K, Kanazawa H, Suzuki T, Oku K, Oyamada T. Distribution of influenza virus sialoreceptors on upper and lower respiratory tract in horses and dogs.. J Vet Med Sci 2011 Jan;73(1):125-7.
- Scocco P, Pedini V. Localization of influenza virus sialoreceptors in equine respiratory tract.. Histol Histopathol 2008 Aug;23(8):973-8.
- Suzuki Y, Ito T, Suzuki T, Holland RE Jr, Chambers TM, Kiso M, Ishida H, Kawaoka Y. Sialic acid species as a determinant of the host range of influenza A viruses.. J Virol 2000 Dec;74(24):11825-31.
- van Riel D, Munster VJ, de Wit E, Rimmelzwaan GF, Fouchier RA, Osterhaus AD, Kuiken T. Human and avian influenza viruses target different cells in the lower respiratory tract of humans and other mammals.. Am J Pathol 2007 Oct;171(4):1215-23.
- Gao Y, Zhang Y, Shinya K, Deng G, Jiang Y, Li Z, Guan Y, Tian G, Li Y, Shi J, Liu L, Zeng X, Bu Z, Xia X, Kawaoka Y, Chen H. Identification of amino acids in HA and PB2 critical for the transmission of H5N1 avian influenza viruses in a mammalian host.. PLoS Pathog 2009 Dec;5(12):e1000709.
- Hatta M, Gao P, Halfmann P, Kawaoka Y. Molecular basis for high virulence of Hong Kong H5N1 influenza A viruses.. Science 2001 Sep 7;293(5536):1840-2.
- Steel J, Lowen AC, Mubareka S, Palese P. Transmission of influenza virus in a mammalian host is increased by PB2 amino acids 627K or 627E/701N.. PLoS Pathog 2009 Jan;5(1):e1000252.
Citations
This article has been cited 20 times.- Mei M, Zhang X, Wu Q, Xu M, Zhao Y. Virulence and transmission characteristic of H3N8 avian influenza virus circulating in chickens in China. Virulence 2026 Dec;17(1):2613516.
- Rabezanahary H, Gilbert C, Santerre K, Scarrone M, Gilbert M, Thériault M, Brousseau N, Masson JF, Pelletier JN, Boudreau D, Trottier S, Baz M. Live virus neutralizing antibodies against pre and post Omicron strains in food and retail workers in Québec, Canada. Heliyon 2024 May 30;10(10):e31026.
- Kirk NM, Liang Y, Ly H. Comparative Pathology of Animal Models for Influenza A Virus Infection. Pathogens 2023 Dec 29;13(1).
- Panzera Y, Mirazo S, Baz M, Techera C, Grecco S, Cancela F, Fuques E, Condon E, Calleros L, Camilo N, Fregossi A, Vaz I, Pessina P, Deshpande N, Pérez R, Benech A. Detection and genome characterisation of SARS-CoV-2 P.6 lineage in dogs and cats living with Uruguayan COVID-19 patients. Mem Inst Oswaldo Cruz 2023;117:e220177.
- Vandoorn E, Stadejek W, Leroux-Roels I, Leroux-Roels G, Parys A, Van Reeth K. Human Immunity and Susceptibility to Influenza A(H3) Viruses of Avian, Equine, and Swine Origin. Emerg Infect Dis 2023 Jan;29(1):98-109.
- Belser JA, Pulit-Penaloza JA, Maines TR. Ferreting Out Influenza Virus Pathogenicity and Transmissibility: Past and Future Risk Assessments in the Ferret Model. Cold Spring Harb Perspect Med 2020 Jul 1;10(7).
- Gahan J, Garvey M, Asmah Abd Samad R, Cullinane A. Whole Genome Sequencing of the First H3N8 Equine Influenza Virus Identified in Malaysia. Pathogens 2019 May 10;8(2).
- Bhide Y, Dong W, Gribonika I, Voshart D, Meijerhof T, de Vries-Idema J, Norley S, Guilfoyle K, Skeldon S, Engelhardt OG, Boon L, Christensen D, Lycke N, Huckriede A. Cross-Protective Potential and Protection-Relevant Immune Mechanisms of Whole Inactivated Influenza Virus Vaccines Are Determined by Adjuvants and Route of Immunization. Front Immunol 2019;10:646.
- Fox A, Quinn KM, Subbarao K. Extending the Breadth of Influenza Vaccines: Status and Prospects for a Universal Vaccine. Drugs 2018 Sep;78(13):1297-1308.
- Boonnak K, Matsuoka Y, Wang W, Suguitan AL Jr, Chen Z, Paskel M, Baz M, Moore I, Jin H, Subbarao K. Development of Clade-Specific and Broadly Reactive Live Attenuated Influenza Virus Vaccines against Rapidly Evolving H5 Subtype Viruses. J Virol 2017 Aug 1;91(15).
- Fertey J, Bayer L, Grunwald T, Pohl A, Beckmann J, Gotzmann G, Casado JP, Schönfelder J, Rögner FH, Wetzel C, Thoma M, Bailer SM, Hiller E, Rupp S, Ulbert S. Pathogens Inactivated by Low-Energy-Electron Irradiation Maintain Antigenic Properties and Induce Protective Immune Responses. Viruses 2016 Nov 23;8(11).
- Li X, Yang J, Liu B, Jia Y, Guo J, Gao X, Weng S, Yang M, Wang L, Wang LF, Cui J, Chen H, Zhu Q. Co-circulation of H5N6, H3N2, H3N8, and Emergence of Novel Reassortant H3N6 in a Local Community in Hunan Province in China. Sci Rep 2016 May 6;6:25549.
- Pavulraj S, Bera BC, Joshi A, Anand T, Virmani M, Vaid RK, Shanmugasundaram K, Gulati BR, Rajukumar K, Singh R, Misri J, Singh RK, Tripathi BN, Virmani N. Pathology of Equine Influenza virus (H3N8) in Murine Model. PLoS One 2015;10(11):e0143094.
- Miller MA, Ganesan AP, Luckashenak N, Mendonca M, Eisenlohr LC. Endogenous antigen processing drives the primary CD4+ T cell response to influenza. Nat Med 2015 Oct;21(10):1216-22.
- Baz M, Paskel M, Matsuoka Y, Zengel JR, Cheng X, Treanor JJ, Jin H, Subbarao K. A Single Dose of an Avian H3N8 Influenza Virus Vaccine Is Highly Immunogenic and Efficacious against a Recently Emerged Seal Influenza Virus in Mice and Ferrets. J Virol 2015 Jul;89(13):6907-17.
- Feng KH, Gonzalez G, Deng L, Yu H, Tse VL, Huang L, Huang K, Wasik BR, Zhou B, Wentworth DE, Holmes EC, Chen X, Varki A, Murcia PR, Parrish CR. Equine and Canine Influenza H3N8 Viruses Show Minimal Biological Differences Despite Phylogenetic Divergence. J Virol 2015 Jul;89(13):6860-73.
- Baz M, Paskel M, Matsuoka Y, Zengel J, Cheng X, Treanor JJ, Jin H, Subbarao K. A live attenuated equine H3N8 influenza vaccine is highly immunogenic and efficacious in mice and ferrets. J Virol 2015 Feb;89(3):1652-9.
- Jang YH, Seong BL. Options and obstacles for designing a universal influenza vaccine. Viruses 2014 Aug 18;6(8):3159-80.
- Karlsson EA, Ip HS, Hall JS, Yoon SW, Johnson J, Beck MA, Webby RJ, Schultz-Cherry S. Respiratory transmission of an avian H3N8 influenza virus isolated from a harbour seal. Nat Commun 2014 Sep 3;5:4791.
- Margine I, Krammer F, Hai R, Heaton NS, Tan GS, Andrews SA, Runstadler JA, Wilson PC, Albrecht RA, García-Sastre A, Palese P. Hemagglutinin stalk-based universal vaccine constructs protect against group 2 influenza A viruses. J Virol 2013 Oct;87(19):10435-46.
Use Nutrition Calculator
Check if your horse's diet meets their nutrition requirements with our easy-to-use tool Check your horse's diet with our easy-to-use tool
Talk to a Nutritionist
Discuss your horse's feeding plan with our experts over a free phone consultation Discuss your horse's diet over a phone consultation
Submit Diet Evaluation
Get a customized feeding plan for your horse formulated by our equine nutritionists Get a custom feeding plan formulated by our nutritionists