The purpose of the present review was a comparison of the abortions caused by EAV and EHV-1 viruses over the 34 years. A total of 452 tissues samples from aborted fetuses (347) or foals (105) stillborn or newborn that died within 72 hours were investigated. The material for the examinations came from different farms located throughout Poland. The tissue homogenates were examined by using virus isolation test in RK-13 and Vero cell lines and the cytopathic agent was confirmed as EHV-1 by the direct fluorescent antibody test or as EAV by the indirect fluorescent antibody test. The study indicated that EAV was isolated (104 cases, 23%) almost as equally often as EHV-1 (116 cases, 25.6%). Both, equid herpesvirus-associated abortion and the abortion induced by EAV were characterized by cyclicity. The percentage of EAV and EHV-1 isolation alternately reduced and increased, but the increase of isolation of one virus was accompanied by the decrease of the other. The domination of one virus over the other occurred in cycles of a few years.
Allen GP (2013) Equine rhinopneumonitis. In: O’Neill B (ed) O.I.E. Manual of standards for diagnostic tests and vaccines for terrestrial animals (mammals, birds and bees), 7th ed. Vol. 2, Office International Des Epizooties, Paris, pp 894-903.
Animal Health Trust. DEFRA/AHT/BEVA Equine Quarterly Disease Surveillance Reports. http://www.aht.org.uk/cms-display/DEFRA-AHT-BEVA-equine-reports.html
Fritsche AK, Borchers K (2010) Detection of neuropathogenic strains of Equid Herpesvirus 1 (EHV-1). Vet Microbiol 147: 176-180.
Fukunaga Y, McCollum WH (1977) Complement - fixation reactions in equine viral arteritis. Am J Vet Res 38: 2043-2046.
Giles RC, Donahue JM, Hong CB, Tuttle PA, Petrites- -Murphy MB, Poonacha KB, Roberts AW, Tramontin RR, Smith B, Swerczek TW (1993) Causes of abortion, stillbirth and perinatal deaths in horses: 3,527 cases (1986-1991). J Am Vet Med Assoc 203: 1170-1185.
Hong CB, Donahue JM, Giles RC Jr, Petrites-Murphy MB, Poonacha KB, Roberts AW, Smith BJ, Tramontin RR, Tuttle PA, Swerczek TW (1993) Equine abortion and stillbirth in central Kentucky during 1988 and 1989 foaling seasons. J Vet Diagn Invest 5: 560-566.
Kentucky College of Agriculture, Foot and Environment. Gluck Equine research Center Department of Veterinary Science. Equine Disease Quarterly. http://www.ca.uky.edu/gluck/q-oct10.asp
Laugier C, Foucher N, Sevin C, Leon A, Tapprest J (2011) A 24-year retrospective study of equine abortion in Normandy (France). J Equine Vet Sci 31: 116-123.
Smith KC, Blunden AS, Whitwell KE, Dunn KA, Wales AD (2003) A survey of equine abortion, stillbirth and neonatal death in UK from 1988 to 1997. Equine Vet J 35: 496-501.
Szeredi L, Hornya´k A´ , Pa´lfi V, Molna´r T, Gla´vits R, De´nes B (2005) Study on the epidemiology of equine arteritis virus infection with different diagnostic techniques by investigating 96 cases of equine abortion in Hungary. Vet Microbiol 108: 235-242.
Szeredi L, Tenk M, Ja´nosi S, Pa´lfi V, Hotzel H, Sachse K, Pospischil A, Bozsó M, Gla´vits R, Molna´r T (2008) A survey of equine abortion and perinatal foal losses in Hungary during a three - year period (1998-2000). Acta Vet Hung 56: 353-367.
Tengelsen LA, Yamini B, Mullaney TP, Bell TG, Render JA, Patterson JS, Steficek BA, Fitzgerald SD, Kennedy FA, Slanker MR, Ramos-Vara JA (1997) A 12-year retrospective study of equine abortion in Michigan. J Vet Diagn Invest 9: 303-306.
Timoney PJ (2013) Equine Viral Arteritis. In: O’Neill B (ed) O.I.E. Manual of standards for diagnostic tests and vaccines for terrestrial animals (mammals, birds and bees), 7th ed., vol. 2, Office International Des Epizooties, Paris, pp 1-16.
Timoney PJ, McCollum WH (1993) Equine viral arteritis. Vet Clin North Am Equine Pract 9: 295-309.