Prevalence of serum antibodies to bovine herpesvirus-1 in cattle in Galicia (NW Spain)

Abstract

Infectious bovine rhinotracheitis (IBR) is a highly infectious disease of cattle caused by bovine herpesvirus 1 (BHV-1) that causes considerable economic losses to the dairy and beef industry. This report describes the results of two surveys in which prevalence of serum antibodies against BHV-1 in Galicia (NW Spain) was determined. The first was performed on the entire cattle population of the region (year 2000) and the second on the herds included in a voluntary livestock health programme, which comprises IBR, conducted by a group of farms designated ADSG (Health Defence Groups) in this same region (year 2004). Anti-BHV-1 antibodies were determined by anti-gB ELISA in serum samples from all animals aged over one year in the area's dairy and beef herds. Mean individual animal and herd prevalence recorded in 2000 were 38.4% (ranging 37.3%-39.5%; 43.2% dairy, 26.8% beef) and 50.4% (ranging 46.4%-54.4%; 58.3% dairy, 48.1% beef), respectively. Mean true prevalence by herd and animal for the ADSG farms were 47.2% (44.9%-49.5%; 51.5% dairy, 45.2% beef, 42.3% mixed) and 35.7% (35.3%-36.1%; 37.8% dairy, 33.1% beef, 25.5% mixed), respectively. However, the use of non-maker vaccines make difficult to develop a control and eradication program based on serological analysis.Additional key words: BHV-1, IBR, seroprevalence. Resumen Prevalencia de anticuerpos séricos frente al herpesvirus bovino tipo 1 en el ganado vacuno de Galicia (NO España)La rinotraqueitis infecciosa bovina (IBR) es una enfermedad infecciosa del ganado producida por el herpesvirus bovino tipo 1 (BHV-1) que causa considerables pérdidas económicas en la industria láctea y cárnica. Este artículo describe los resultados de dos estudios de prevalencia en los que se determina la presencia de anticuerpos frente al BHV-1 en Galicia (NO de España). El primero fue realizado sobre toda la población bovina de la región (año 2000) y el segundo sobre los rebaños pertenecientes a las asociaciones de defensa sanitaria ganaderas (ADSG) en la misma región (año 2004), que realizan un programa de vigilancia que incluye la IBR. La presencia de anticuerpos se determinó con un ELISA anti-gB en las muestras de suero de todos los animales mayores de 1 año de los rebaños estudiados. Las prevalencias medias por animal y por rebaño halladas en 2000 fueron 38,4% (intervalo 37,3%-39,5%; 43,2% en leche y 26,8% en carne) y 50,4% (intervalo 46,4%-54,4%; 58,3% en leche y 48,1% en carne) respectivamente. La prevalencia real media de rebaño y animal para las granjas de las ADSG fue de 47,2% (44,9%-49,5%; 51,5% en leche, 45,2% en carne y 42,3% en mixtas) y 35,7% (35,3%-36,1%; 37,8% en leche, 33,1% en carne y 25,5% en mixtas) respectivamente. Sin embargo, el uso de vacunas no marcadoras dificulta el desarrollo de programas de control y erradicación basados en el análisis serológico.Palabras clave adicionales: BHV-1, IBR, seroprevalencia.

Seroprevalence and risk factors associated with bovine herpesvirus 1 and bovine viral diarrhea virus in North-Eastern Mexico

“…However, the prevalences in this study are lower than those reported by Córdova-Izquierdo et al (2007) in humid tropics of Mexico (90%). Seroprevalences of BoHV-1 in the literature range from 7.5 up to 70.89 % (Solis-Calderon et al, 2003;Eiras et al, 2009;Gupta et al, 2010;Cedeño et al, 2011;Raizman et al, 2011;Yousef et al, 2013;Saravanajayam et al, 2015). The seroprevalence found in this study for BoHV-1, indicates that it is a widely distributed infection in the region.…”

Distribution of Bovine Herpesvirus 1 in Cattle Population and Bulls From Centers for Artificial Insemination and Private Farms in Bulgaria

“…In Portugal, the prevalence is 47.2%, in dairy herds in Italy from 61 to 84%, for beef herds 59% and for mixed herds 89%. In Spain, the prevalence is between 38.4% and 50.4% Eiras et al (2009). In Belgium, the positivity rate for dairy herds is 35%, for beef cows 31% and for mixed herds 43% (Boelaert et al 2000).…”

Development of a quantitative risk assessment of bovine viral diarrhea virus and bovine herpesvirus-1 introduction in dairy cattle herds to improve biosecurity

“…Currently, in Spain, BVDV and BoHV-1 control programs are voluntary, and only implemented in some regions. In fact, in Galicia (northwestern Spain), the program for both diseases is voluntary (Lindberg et al, 2006;Eiras et al, 2009). However, since September 2019, a volun- tary control program for BoHV-1 has been created in Spain (Royal Decree 554/2019; BOE, 2019).…”