[1. Bi Y., Fu G., Chen J., Peng J., Sun Y., Wang J., Pu J., Zhang Y., Gao H., Ma G., Tian F., Brown I.H., Liu J.: Novel swine influenza virus reassortants in pigs, China. Emerg Infect Dis 2010, 16, 1162-1164.10.3201/eid1607.091881]Search in Google Scholar
[2. Brown I.H., Chakraverty P., Harris P.A., Alexander D.J.: Disease outbreaks in pigs in Great Britain due to an influenza A virus of H1N2 subtype. Vet Rec 1995, 136, 328-329.10.1136/vr.136.13.328]Search in Google Scholar
[3. Brown I.H., Harris P.A., McCauley J.W., Alexander D.J.: Multiple genetic reassortment of avian and human influenza A viruses in European pigs, resulting in the emergence of an H1N2 virus of novel genotype. J Gen Virol 1998, 79, 2947-2955.10.1099/0022-1317-79-12-2947]Search in Google Scholar
[4. Brown I.H.: The epidemiology and evolution of influenza viruses in pigs. Vet Microbiol 2000, 74, 29-46.10.1016/S0378-1135(00)00164-4]Search in Google Scholar
[5. Chiapponi C., Moreno A., Barbieri I., Merenda M., Foni E.: Multiplex RT-PCR assay for differentiating European swine influenza virus subtypes H1N1, H1N2 and H3N2. J Virol Methods 2012, 184, 117-120.10.1016/j.jviromet.2012.05.02022664185]Search in Google Scholar
[6. Chutinimitkul S., Thippamom N., Damrongwatanapokin S., Payungporn S., Thanawongnuwech R., Amonsin A., Boonsuk P., Sreta D., Bunpong N., Tantilertcharoen R., Chamnanpood P., Parchariyanon S., Theamboonlers A., Poovorawan Y.: Genetic characterization of H1N1, H1N2 and H3N2 swine influenza virus in Thailand. Arch Virol 2008, 153, 1049-1056.10.1007/s00705-008-0097-718458812]Search in Google Scholar
[7. Dunham E.J., Dugan V.G., Kaser E.K., Perkins S.E., Brown I.H., Holmes E.C., Taubenberger J.K.: Different evolutionary trajectories of European avian-like and classical swine H1N1 influenza A viruses. J Virol 2008, 83, 5485-5494.10.1128/JVI.02565-08268195119297491]Search in Google Scholar
[8. Gourreau J.M., Kaiser C., Valette M., Douglas A.R., Labie J., Aymard M.: Isolation of two H1N2 influenza viruses from swine in France. Arch Virol 1994, 135, 365-382.10.1007/BF013100217979974]Search in Google Scholar
[9. Gray G.C., McCarthy T., Capuano A.W., Setterquist S.F., Olsen C.W., Alavanja M., Lynch C.: Swine workers and swine influenza virus infections. Emerg Infect Dis 2007, 13, 1871-1878.10.3201/eid1312.061323287673918258038]Search in Google Scholar
[10. Kong W.L., Huang L.Z., Qi H.T., Cao N., Zhang L.Q., Wang H., Guan S.S., Qi W.B., Jiao P.R., Liao M., Zhang G.H.: Genetic characterization of H1N2 influenza a virus isolated from sick pigs in Southern China in 2010. Virol J 2011, 13, 469-456.10.1186/1743-422X-8-469322172321995516]Search in Google Scholar
[11. Kuntz-Simon G., Madec F.: Genetic and antigenic evolution of swine influenza viruses in Europe and evaluation of their zoonotic potential. Zoonoses Public Health 2009, 56, 310-325.10.1111/j.1863-2378.2009.01236.x]Search in Google Scholar
[12. Kyriakis C.S., Brown I.H., Foni E., Kuntz-Simon G., Maldonado J., Madec F., Essen S.C., Chiapponi C., Van Reeth K.: Virological surveillance and preliminary antigenic characterization of influenza viruses in pigs in five European countries from 2006 to 2008. Zoonoses Public Health 2011, 58, 93-101.10.1111/j.1863-2378.2009.01301.x]Search in Google Scholar
[13. Loeffen W.L., Kamp E.M., Stockhofe-Zurwieden N., van Nieuwstadt A.P., Bongers J.H., Hunneman W.A., Elbers A.R., Baars J., Nell T., van Zijderveld F.G.: Survey of infectious agents involved in acute respiratory disease in finishing pigs. Vet Rec 1999, 145, 123-129.10.1136/vr.145.5.123]Search in Google Scholar
[14. Madec F., Kaiser C., Gourreau J.M., Martinat-Botte F.: Pathologic consequences of a severe influenza outbreak (swine virus A/H1N1) under natural conditions in the non-immune sow at the beginning of pregnancy. Comp Immunol Microbiol Infect Dis 1989, 12, 17-27.10.1016/0147-9571(89)90005-2]Search in Google Scholar
[15. Maldonado J., Van Reeth K., Riera P., Sitjà M., Saubi N., Espuña E., Artigas C.: Evidence of the concurrent circulation of H1N2, H1N1 and H3N2 influenza A viruses in densely populated pig areas in Spain. Vet J 2006, 172, 377-381.10.1016/j.tvjl.2005.04.01415914047]Search in Google Scholar
[16. Markowska-Daniel I., Kowalczyk A.: Prevalence of swine influenza in Poland. Med Weter 2005, 61, 669-673.]Search in Google Scholar
[17. Markowska-Daniel I., Kowalczyk A., Pejsak Z.: First case of the isolation of the H3N2 swine influenza virus in Poland. Bull Vet Inst Pulawy 2009, 53, 327-331.]Search in Google Scholar
[18. Marozin S., Gregory V., Cameron K., Bennett M., Valette M., Aymard M., Foni E., Barigazzi G., Lin Y., Hay A.: Antigenic and genetic diversity among swine influenza A H1N1 and H1N2 viruses in Europe. J Gen Virol 2002, 83, 735-745.10.1099/0022-1317-83-4-73511907321]Search in Google Scholar
[19. Moreno A., Chiapponi C., Boniotti M.B., Sozzi E., Foni E., Barbieri I., Zanoni M.G., Faccini S., Lelli D., Cordioli P.: Genomic characterization of H1N2 swine influenza viruses in Italy. Vet Microbiol 2012, 156, 265-276.10.1016/j.vetmic.2011.11.00422112856]Search in Google Scholar
[20. Myers K.P., Olsen C.W., Gray G.C.: Cases of swine influenza in humans: a review of the literature. Clin Infect Dis 2007, 44, 1084-1088.10.1086/512813197333717366454]Search in Google Scholar
[21. Olsen C.W. Brammer L., Easterday B.C., Arden N., Belay E., Baker I., Cox N.J.: Serologic evidence of H1 swine influenza virus infection in swine farm residents and employees. Emerg Infect Dis 2002, 8, 814-819.10.3201/eid0808.010474273250512141967]Search in Google Scholar
[22. Olsen C.W., Brown I.H., Easterday B.C., Van Reeth K.: Swine influenza. In: Disease of swine. Edited by Straw B.E., Zimmerman J., D’Allaire S., Taylor D.J., the Iowa State University Press, Ames, USA 2006, pp. 469-482.]Search in Google Scholar
[23. Pejsak Z., Markowska-Daniel I., Kowalczyk A., Jabłoński A., Kozaczyński W., Loda M: Reproduction disorders connected with swine influenza outbreak in the large farm. Med Weter 2005, 61, 1154-1159.]Search in Google Scholar
[24. Richt J.A., Lager K.M., Janke B.H., Woods R.D., Webster R.G., Webby R.J.: Pathogenic and antigenic properties of phylogenetically distinct reassortant H3N2 swine influenza viruses cocirculating in the United States. J Clin Microbiol 2003, 41, 3198-3205.10.1128/JCM.41.7.3198-3205.200316537612843064]Search in Google Scholar
[25. Schrader C., Süss J.: Genetic characterization of a porcine H1N2 influenza virus strain isolated in Germany. Intervirology 2003, 46, 66-70.10.1159/000068124]Search in Google Scholar
[26. Schultz U., Fitch W.M., Ludwig S., Mandler J., Scholtissek C.: Evolution of pig influenza viruses. Virology 1991, 183, 61-73.10.1016/0042-6822(91)90118-U]Search in Google Scholar
[27. Slomka M.J., Densham A.L., Coward V.J., Essen S., Brookes S.M., Irvine R.M., Spackman E., Ridgeon J., Gardner R., Hanna A., Suarez D.L., Brown I.H.: Real time reverse transcription (RRT)-polymerase chain reaction (PCR) methods for detection of pandemic (H1N1) 2009 influenza virus and European swine influenza A virus infections in pigs. Influenza Other Resp Viruses 2010, 4, 277-293.10.1111/j.1750-2659.2010.00149.x463465020716157]Search in Google Scholar
[28. Trebbien R.: Influenza A virus in pigs - diagnosis, pathogenesis and host restriction. PhD thesis. Copenhagen, 2010, pp. 101-131.]Search in Google Scholar
[29. Van Reeth K., Brown I.H., Pensaert M.: Isolations of H1N2 influenza A virus from pigs in Belgium. Vet Rec 2000, 146, 588-589.10.1136/vr.146.20.58810839238]Search in Google Scholar
[30. Van Reeth K.V., Brown I., Essen S., Pensaert M.: Genetic relationships, serological cross-reaction and cross-protection between H1N2 and other influenza A virus subtypes endemic in European pigs. Virus Res 2004, 103, 115-124.10.1016/j.virusres.2004.02.02315163499]Search in Google Scholar
[31. Van Reeth K., Brown I.H., Dürrwald R., Foni E., Labarque G., Lenihan P., Maldonado J., Markowska- Daniel I., Pensaert M., Pospisil Z., Koch G.: Seroprevalence of H1N1, H3N2 and H1N2 influenza viruses in pigs in seven European countries in 2002-2003. Influenza Other Resp Viruses 2008, 2, 99-105.10.1111/j.1750-2659.2008.00043.x463469719453469]Search in Google Scholar
[32. Vincent A.L., Ma W., Lager K.M., Gramer M.R., Richt J.A., Janke B.H.: Characterization of a newly emerged genetic cluster of H1N1 and H1N2 swine influenza virus in the United States. Virus Genes 2009, 39, 176-185.10.1007/s11262-009-0386-619597980]Search in Google Scholar
[33. Xu C., Zhu Q., Yang H., Zhang X., Qiao C., Chen Y., Xin X., Chen H.: Two genotypes of H1N2 swine influenza viruses appeared among pigs in China. J Clin Virol 2009, 46, 192-195.10.1016/j.jcv.2009.06.02219632889]Search in Google Scholar
[34. Zell R., Bergmann S., Krumbholz A., Wutzler P., Dürrwald R.: Ongoing evolution of swine influenza viruses: a novel reassortant. Arch Virol 2008, 153, 2085-2092.10.1007/s00705-008-0244-118985274]Search in Google Scholar