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Epidemiology and molecular detection of equine herpesviruses in western Algeria in 2011

Abstract : An episode of acute equine respiratory infection was reported in western Algeria (Tiaret province) between February and March 2011, affecting a large population of horses. Nasal swabs (n=100) were taken from horses aged between 1 and 27 years, presenting with cough and mucopurulent nasal discharge. The prevalence of equine respiratory virus infections was examined using quantitative polymerase chain reaction (qPCR). One, or more, of four equine respiratory viruses were detected in the nasal swabs of 90 of 100 horses (90%) and the detection rate of equine herpesvirus type 1 (EHV-1), equine herpesvirus type 4 (EHV-4), equine herpesvirus type 2 (EHV-2) and equine herpesvirus type 5 (EHV-5) were 2%, 14%, 90% and 75%, respectively. Equine influenza virus and equine arteritis virus were not detected in any samples. Among the 90 infected horses, 70 were coinfected with EHV-2 and EHV-5 and 14 others were co-infected with EHV-4, EHV-2 and EHV-5. The present study shows a positivity rate of 97.3% for EHV-5 in young horses aged<3 years; a finding which decreased with age. Viral load of EHV-5 was significantly higher in<3 years whereas no effect of age was observed with EHV-2. The study shows that equine herpesviruses 1, 2, 4 and 5 are endemic in horse populations from Algeria as detected for the first time by qPCR.
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Farouk Laabassi, Erika Hue, Christine Fortier, Elodie Morilland, Loïc Legrand, et al.. Epidemiology and molecular detection of equine herpesviruses in western Algeria in 2011. Veterinary Microbiology, Elsevier, 2017, 207, pp.205-209. ⟨10.1016/j.vetmic.2017.06.017⟩. ⟨hal-01968325⟩



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