BVDV and BHV-1 infections in dairy herds in northern and northeastern Thailand

被引:29
作者
Kampa, J
Ståhl, K
Moreno-López, J
Chanlun, A
Aiumlamai, SA
Alenius, S
机构
[1] Swedish Univ Agr Sci, Fac Vet Med & Anim Sci, Dept Biomed Sci & Vet Publ Hlth, Div Parasitol & Virol, SE-75007 Uppsala, Sweden
[2] Swedish Univ Agr Sci, Fac Vet Med & Anim Sci, Dept Ruminant Med & Vet Epidemiol, SE-75007 Uppsala, Sweden
[3] Khon Kaen Univ, Fac Med Vet, Dept Pathobiol, Khon Kaen, Thailand
[4] Khon Kaen Univ, Fac Med Vet, Dept Med, Khon Kaen, Thailand
[5] Khon Kaen Univ, Fac Med Vet, Dept Surg & Theriogenol, Khon Kaen, Thailand
关键词
BVDV; BHV-1; bulk milk; prevalence; Thailand;
D O I
10.1186/1751-0147-45-181
中图分类号
S85 [动物医学(兽医学)];
学科分类号
0906 ;
摘要
Bulk milk samples from 220 dairy herds were collected at 9 public milk collection centres in the northeastern and northern Thailand, and a subset of I I herds was selected for individual testing. The samples were tested for presence of antibodies to BVDV and BHV-1 using an indirect ELISA. The results from the bulk milk testing demonstrated a moderate level of exposure to BVDV and BHV-1 (73% and 67%, respectively). However, the low proportion of herds with high BVDV antibody-levels (13%) and the low within-herd seroprevalence of BVDV and BHV-1 in the 11 herds (24% and 5%, respectively), particularly among the young stock (15% and 0%, respectively), demonstrated a low prevalence of active BVDV infection and a low rate of reactivation of latent BHV-1. The presence of a self-clearance process was also indicated by the results from the individual testing. Moreover, a surprisingly low prevalence of BVDV and BHV-1 anti body-positive herds at one of the milk centres was found. This centre was established 5-10 years before the others. Our impression is that this reflects the self-clearance process, where consecutive replacement of imported infected animals without further spread has resulted in a nearly total elimination of the infections. Based on our experiences and on these results we are convinced that this process can continue if there is awareness of herd biosecurity. This is especially important in the context of a future intensification of the dairy production.
引用
收藏
页码:181 / 192
页数:12
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