Mousing J, Permin A, Mortensen S, Bøtner A, Willeberg P
Federation of Danish Pig Producers and Slaughterhouses, Copenhagen, Denmark.
Vet Microbiol. 1997 Apr;55(1-4):323-8. doi: 10.1016/s0378-1135(96)01321-1.
Sixty-eight case herds seropositive to porcine reproductive and respiratory syndrome (PRRS) were compared to 128 seronegative controls in a double-blinded questionnaire survey. The study indicated no increased risk of PRRS seropositivity for herds using artificial insemination with semen from PRRS seropositive AI-stations. Also the herd-size was non-related to the risk of PRRS seropositivity, indicating that air-borne spread of PRRS may not have been a predominant feature in Denmark. Introduction of replacement breeding animals from seropostive breeding- and multiplying herds significantly increased the risk of a herd being PRRS seropositive, as did introduction of 25 kg pigs for feeding. PRRS seropositivity was in the farmers' opinions associated with abortions in sows, early farrowing, high postweaning mortality and low weight gain in fattening pigs. However, the reported frequencies of probelms were relatively low.
在一项双盲问卷调查中，将68个猪繁殖与呼吸综合征（PRRS）血清阳性病例群与128个血清阴性对照群进行了比较。该研究表明，使用来自PRRS血清阳性人工授精站精液进行人工授精的猪群，PRRS血清阳性风险并未增加。此外，猪群规模与PRRS血清阳性风险无关，这表明PRRS的空气传播在丹麦可能不是一个主要特征。从血清阳性繁殖和扩繁猪群引入后备种畜，以及引入25千克的育肥猪用于饲养，均显著增加了猪群PRRS血清阳性的风险。在农民看来，PRRS血清阳性与母猪流产、早产、断奶后高死亡率以及育肥猪低体重增加有关。然而，所报告的问题发生率相对较低。
