Serological survey of the bovine leukosis virus infection in dairy herds of the Rio Grande do Sul State, Brazil

Ciência Rural

Weiblen, Rudi²  Rabuske, Marta¹  Rebelatto, Marlon Cezar¹  Flores, Eduardo Furtado²  Pereira, Neíte Machado⁴  Moraes, Mauro Pires³  Oliveira, João César Dias¹  Zanini, Marildo¹  Hübner, Sílvia de Oliveira¹ 

[1] Universidade Federal de Santa Maria (UFSM);Universidade Federal de Santa Maria (UFSM), Santa Maria, Brasil;Universidade Federal de Santa Maria

关键词: bovine leukemia virus;    serology;    survey;    epidemiology;   

DOI  :  10.1590/S0103-84781996000200015

学科分类：农业科学（综合）

来源: Universidade Federal de Santa Maria * Centro de Ciencias Rurais

【 摘 要 】

Bovine leukosis vírus (BLV) is associated with a persistem infection in cattle that is responsible for serious lasses to the livestock industry. The objective of this study was to determine the prevalence and to analyse some epidemiological aspects of the BLV infection in the dairy herd of the Rio Grande do Sul state. A total of 39.799 blood samples, collected in 4,200 herds from 172 counties, distributed in 9 geographic regions, were tested by the agar-gel immunodiffusion test (AGID) with glycoproteic antigen (glycoprotein gp 51). The sorologic tests showed 3,645 (9.2%) positive; however, the prevalence in the state, when considered about 1% of the population in each region was only, 12.0% (1,295/10,357) and 29.1% (385/1,321) of the herds had at least one seropositive animal. The prevalence ranged from 2.2% (17.8% of the herds) in Uruguaiana to l9.6% (57.85% of the herds) in São Gabriel. Prevalences of 15.5% (41.8% of herds) in the Porto Alegre metropolitan area. 9.9% (64.4%) in Pelotas, 19.4% (42.9%) in Bagé, 9.2% (36.2%) in Santa Rosa, 12.9% (37.8%) in Erexim, 7.1% (26.5%) in Passo Fundo and 8% (33.8%) in Santa Maria were observed. These results show that the BLV infection is widely spread within the Rio Grande do Sul dairy herd. Nevertheless, the overall prevalence is still low if compared to other states and countries and may be compatible with control and eradication efforts.

【 授权许可】

CC BY-NC