Dee S A, Joo H
Swine Health Center, Morris, MN 56267, USA.
Vet Microbiol. 1997 Apr;55(1-4):347-53. doi: 10.1016/s0378-1135(96)01319-3.
Various methods for the control of PRRS virus have been published. The technology of nursery depopulation (ND) appears to effectively control the spread of virus between members of endemically infected populations. ND consists of a strategic adjustment in pigflow based on the presence of specific serologic patterns as detected by the indirect fluorescent antibody test. This pattern indicates a low seroprevalence of antibodies detected in the breeding herd and recently weaned piglets (< or = 10%), in contrast to a high (> 50%) seroprevalence in 8 to 10 week old piglets. ND has been carried out on swine farms in the US and results indicate improvements in nursery piglet growth rate and mortality levels. Three examples are provided in the following text. Recently a modified live virus vaccine (RespPRRS, NOBL Laboratories/Boerhinger Ingleheim) has become commercially available. It is currently approved for use in piglets from 3 to 18 weeks of age; however, potential for the use in adult animals is currently under investigation.
已发表了多种控制猪繁殖与呼吸综合征病毒的方法。保育猪全群清空（ND）技术似乎能有效控制地方性感染猪群成员之间的病毒传播。ND包括基于间接荧光抗体检测所发现的特定血清学模式对猪群流动进行的策略性调整。这种模式表明，在繁殖猪群和刚断奶仔猪（≤10%）中检测到的抗体血清阳性率较低，而在8至10周龄仔猪中血清阳性率较高（>50%）。美国的猪场已实施了ND，结果显示保育仔猪的生长速度和死亡率有所改善。以下文本提供了三个例子。最近，一种改良活病毒疫苗（RespPRRS，NOBL实验室/勃林格殷格翰）已上市。目前它被批准用于3至18周龄的仔猪；不过，其在成年动物中的使用潜力目前正在研究中。
