Performance of fattening pigs in a farm infected with both porcine reproductive and respiratory syndrome (PRRS) virus and porcine circovirus type 2 following sow and piglet vaccination with an attenuated PRRS vaccine
Performance of fattening pigs in a farm infected with both porcine reproductive and respiratory syndrome (PRRS) virus and porcine circovirus type 2 following sow and piglet vaccination with an attenuated PRRS vaccine
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DOI：
10.1111/j.1439-0442.2007.00932.x
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发表时间：
2007-08-01
期刊：
影响因子：
--
通讯作者：
Kyriakis, S. C.
中科院分区：
文献类型：
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作者：
Kritas, S. K.;Alexopoulos, C.;Kyriakis, S. C.
本研究的目的是调查在同时存在断奶后多系统消耗综合征（PMWS）和猪繁殖与呼吸综合征（PRRS）的农场中，对母猪及其育肥猪接种PRRS疫苗是否能预防这些综合征。在一个有PRRS和PMWS病史的猪场，200头后备母猪和母猪被分为两组，每组大小相同。第一组（c -母猪组）作为未处理的对照，第二组（v -母猪组）接种猪Porcilis PRRS (R)活疫苗。在下一次断奶时，C组一半母猪的所有仔猪在35日龄时接种1次疫苗（CV组），而未接种疫苗的另一半母猪的后代不接种疫苗（CC组）。同样，V型母猪组的一半母猪的后代接种疫苗（VV组），而另一半接种疫苗的母猪的后代不接种疫苗（VC组）。苗期和育肥期各组间发病率无显著差异，CV-组和vv -组显著降低了苗木发病率（P < 0.05）。仔猪接种后养殖户的死亡率显著低于未接种仔猪的仔猪（P < 0.05）。与未接种组相比，接种组仔猪的平均日增重和饲料系数显著提高（P < 0.05）。
The purpose of the study was to investigate whether, on farms with both post-weaning multisystemic wasting syndrome (PMWS) and porcine reproductive and respiratory syndrome (PRRS), the PRRS vaccination of sows and their fattening pigs protects against these syndromes. In a farrow-to-finish pig farm with a history of PRRS and PMWS, 200 gilts and sows were allocated to one of two groups of equal size. The first group (C-sow group) was used as untreated controls, while the animals of the second group (V-sow group) were vaccinated with live Porcilis PRRS (R) vaccine. At the next weaning, all piglets of half the sows of the C sow group were vaccinated once at 35 days of age with the vaccine (CV group), while the offspring of the other half of the unvaccinated sows were left unvaccinated (CC group). Similarly, the offspring of half the sows of the V sow group were vaccinated (VV group), while those of the other half of the vaccinated sows were left unvaccinated (VC group). No significant differences in morbidity were observed between the groups during the nursery and finishing phases, while morbidity in the growers was significantly reduced in the CV- and VV-groups (P < 0.05). Growers' mortality was significantly reduced after piglet vaccination when compared with unvaccinated pigs of unvaccinated dams (P < 0.05). Average daily gain and feed conversion ratio were significantly improved in vaccinated piglets compared with those in the unvaccinated groups (P < 0.05).