English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/48383
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Effects of housing on the incidence of visna/maedi virus infection in sheep flocks

AutorLeginagoikoa, Iratxe; Minguijón, Esmeralda; Juste, Ramón A.; Barandika, Jesse F.; Amorena Zabalza, Beatriz ; Andrés, Damián F. de ; Badiola Díez, Juan José; Luján, Lluís; Berriatua, Eduardo
Palabras claveMaedi–visna virus
Fecha de publicaciónjun-2010
CitaciónResearch in veterinary science 88(3): 415-421 (2010)
ResumenThe incidence of seroconversion to visna/maedi virus (VMV) infection and its relationship with management and sheep building structure was investigated in 15 dairy sheep flocks in Spain during 3–7 years. Incidence rates were 0.09 per sheep-year at risk in semi-intensive Latxa flocks and 0.44 per sheep-year at risk in intensive Assaf flocks and was greatest for the one year old Assaf replacement flock. Separate multivariable models developed for replacement and adult flocks indicated that in both cases seroconversion was strongly associated to direct contact exposure to infected sheep and to being born to a seropositive dam. The latter effect was independent of the mode of rearing preweaning and the risk of seroconversion was similar for sheep fed colostrum and milk from a seropositive or a seronegative dam. These results are further evidence of the efficiency of horizontal VMV transmission by close contact between sheep and also suggest a inheritable component of susceptibility and resistance to infection. In contrast, indirect aerogenous contact with seropositive sheep was not associated with seroconversion as evidenced in replacement sheep housed in separate pens in the same building as adult infected sheep for one year. Consequently, VMV may not be efficiently airborne over short distances and this is important for control of infection. Moreover, there was no relationship between seroconversion and shed open areas. The latter could be related to having examined few flocks in which high infection prevalence dominated the transmission process while ventilation, may depend on a variety of unrecorded factors whose relationship to infection needs to be further investigated.
Descripción7 p., 5 tables, 1 figure and bibliography
Versión del editorhttp://dx.doi.org/10.1016/j.rvsc.2009.11.006
Aparece en las colecciones: (IDAB) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
restringido.pdf21,67 kBAdobe PDFVista previa
Mostrar el registro completo

Artículos relacionados:

NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.