Seroprevalence small ruminant lentiviruses in the state of Pernambuco slaughterhouses, Brazil

ABSTRACT: The prevalence of lentivirus infection of small ruminants (LVPR) was determined in samples of serum from goats and sheep in slaughterhouses from ten districts of Pernambuco State. The serological test was used in agarose gel immunodiffusion (AGID) with antigen caprine arthritis and encephalitis virus (CAE)/Maedi Visna virus. Among the 369 blood serum samples of goats examined, seven (1.89%) (0.8-3.9%) were seropositive, and among the 383 sheep samples examined, just one (0.26%) (0.0-1.4%) was infected. The seven seropositive goats came from public slaughterhouses from Gravatá (n=2), Sertânia (n=4) and Timbaúba (n=1), and the soropositive sheep was from a public slaughterhouse of Serra Talhada. The soroprevalence of LVPR infection in small ruminants from Pernambuco's slaughterhouses, of 1.06% (8/752), is considered low.

摘要：本研究针对巴西伯南布哥州10个地区屠宰场采集的山羊与绵羊血清样本，检测了小反刍动物慢病毒感染（Lentivirus Infection of Small Ruminants, LVPR）的流行情况。本次检测采用以山羊关节炎脑炎病毒（Caprine Arthritis and Encephalitis Virus, CAE）/梅迪-维斯纳病毒（Maedi Visna Virus）为抗原的琼脂糖凝胶免疫扩散试验（Agarose Gel Immunodiffusion, AGID）血清学检测方法。在检测的369份山羊血清样本中，共7份呈血清学阳性，阳性率为1.89%（95%置信区间0.8%~3.9%）；在383份绵羊血清样本中，仅1份呈阳性，阳性率为0.26%（95%置信区间0.0%~1.4%）。7份血清学阳性的山羊样本来自格拉瓦塔（Gravatá，n=2）、塞尔坦雅（Sertânia，n=4）以及廷巴乌巴（Timbaúba，n=1）的公立屠宰场；阳性绵羊样本则来自塞拉塔尔哈达（Serra Talhada）的公立屠宰场。伯南布哥州屠宰场小反刍动物LVPR感染的血清流行率为1.06%（8/752），属于较低水平。