PMID- 22405721 OWN - NLM STAT- MEDLINE DCOM- 20130208 LR - 20120910 IS - 1532-2971 (Electronic) IS - 1090-0233 (Linking) VI - 193 IP - 2 DP - 2012 Aug TI - Prevalence of latent alpha-herpesviruses in Thoroughbred racing horses. PG - 579-82 LID - 10.1016/j.tvjl.2012.01.030 [doi] AB - The objective of this study was to detect and characterize latent equine herpes virus (EHV)-1 and -4 from the submandibular (SMLN) and bronchial lymph (BLN) nodes, as well as from the trigeminal ganglia (TG) of 70 racing Thoroughbred horses submitted for necropsy following sustaining serious musculoskeletal injuries while racing. A combination of nucleic acid precipitation and pre-amplification steps was used to increase analytical sensitivity. Tissues were deemed positive for latent EHV-1 and/or -4 infection when found PCR positive for the corresponding glycoprotein B (gB) gene in the absence of detectable late structural protein gene (gB gene) mRNA. The EHV-1 genotype was also determined using a discriminatory real-time PCR assay targeting the DNA polymerase gene (ORF 30). Eighteen (25.7%) and 58 (82.8%) horses were PCR positive for the gB gene of EHV-1 and -4, respectively, in at least one of the three tissues sampled. Twelve horses were dually infected with EHV-1 and -4, two carried a latent neurotropic strain of EHV-1, six carried a non-neurotropic genotype of EHV-1 and 10 were dually infected with neurotropic and non-neurotropic EHV-1. The distribution of latent EHV-1 and -4 infection varied in the samples, with the TG found to be most commonly infected. Overall, non-neurotropic strains were more frequently detected than neurotropic strains, supporting the general consensus that non-neurotropic strains are more prevalent in horse populations, and hence the uncommon occurrence of equine herpes myeloencephalopathy. CI - Copyright (c) 2012 Elsevier Ltd. All rights reserved. FAU - Pusterla, Nicola AU - Pusterla N AD - Department of Veterinary Medicine and Epidemiology, School of Veterinary Medicine, University of California, Davis, CA 95616, USA. npusterla@ucdavis.edu FAU - Mapes, Samantha AU - Mapes S FAU - David Wilson, W AU - David Wilson W LA - eng PT - Journal Article DEP - 20120310 PL - England TA - Vet J JT - Veterinary journal (London, England : 1997) JID - 9706281 RN - 0 (DNA, Viral) SB - IM CIN - Vet J. 2012 Aug;193(2):309-10. PMID: 22738739 MH - Animals MH - Bronchi/virology MH - California/epidemiology MH - DNA, Viral/genetics MH - Female MH - Herpesviridae Infections/epidemiology/*veterinary/virology MH - Herpesvirus 1, Equid/isolation & purification/*physiology MH - Herpesvirus 4, Equid/isolation & purification/*physiology MH - Horse Diseases/*epidemiology/virology MH - Horses MH - Lymph Nodes/*virology MH - Male MH - Mandible/virology MH - Pedigree MH - Prevalence MH - Real-Time Polymerase Chain Reaction/veterinary MH - Trigeminal Ganglion/virology MH - *Virus Latency EDAT- 2012/03/13 06:00 MHDA- 2013/02/09 06:00 CRDT- 2012/03/13 06:00 PHST- 2011/06/26 00:00 [received] PHST- 2012/01/26 00:00 [revised] PHST- 2012/01/29 00:00 [accepted] PHST- 2012/03/13 06:00 [entrez] PHST- 2012/03/13 06:00 [pubmed] PHST- 2013/02/09 06:00 [medline] AID - S1090-0233(12)00066-4 [pii] AID - 10.1016/j.tvjl.2012.01.030 [doi] PST - ppublish SO - Vet J. 2012 Aug;193(2):579-82. doi: 10.1016/j.tvjl.2012.01.030. Epub 2012 Mar 10.