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为探索猪瘟疫苗首次和二次免疫的最佳时间,对淮阳某规模化猪场7头母猪及其各自哺乳仔猪的猪瘟抗体水平进行检测.通过猪瘟IHA试验,发现试验母猪和仔猪的猪瘟抗体水平均较高,仔猪到42日龄时猪瘟母源抗体水平才不能有效保护仔猪.因此,35日龄左右时对仔猪进行猪瘟首免,可以有效减少猪瘟母源抗体对疫苗免疫的干扰,为猪场免疫程序的制订提供参考. 相似文献
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《上海畜牧兽医通讯》2016,(5)
实验旨在观察猪场母猪与仔猪猪瘟的免疫程序。在南堰猪场根据其母猪与仔猪的猪瘟免疫程序,选取15日龄乳猪、25~80日龄断奶保育猪、产后15d母猪、产后25d母猪,采用猪瘟病毒间接ELISA抗体检测法,检测其猪瘟母源抗体与免疫抗体水平,其中,母源抗体合格率随着仔猪日龄的增长有下降趋势,但25日龄断奶时仍然高达97.8%,所以仔猪断奶前无需进行猪瘟疫苗的免疫,还可适当推迟猪瘟活疫苗的首免日龄;而仔猪猪瘟苗首免4周时抗体合格率为100%,因此仔猪猪瘟苗二免的间隔时间应大于1个月;母猪在断奶时猪瘟免疫抗体合格率也为100%,说明该母猪断奶时不需要注射猪瘟活疫苗。从检测的母猪与仔猪的猪瘟母源抗体与免疫抗体的合格率来看,母猪、仔猪在猪瘟免疫注射间隔时间上均有待调整。 相似文献
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多年来,新疆乌鲁木齐垦区猪瘟免疫程序较为混乱,各场免疫效果亦不同。为探讨一种适合本地区的猪瘟免疫程序,有效预防猪瘟,进行本试验。本试验对仔猪猪瘟母源抗体进行跟踪监测,对不同日龄仔猪免疫猪瘟疫苗,然后采集血样,检测猪瘟抗体效价。根据效价不断校正,最终确定为科学合理的猪瘟免疫程序,其免疫程序是:猪瘟的超前免疫,剂量1头份;根据抗体效价下降情况,35日龄进行二免,剂量4头份。仔猪常规免疫:一免30日龄,剂量2头份;二免50日龄,剂量4头份。生产母猪免疫:配种前(后)15d进行免疫,剂量4头份。 相似文献
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试验随机选取24头30日龄(体重范围为7.5~9.0 kg)健康仔猪,16头健康后备母猪。24头小猪随机分成两组,每组12头;16头母猪随机分成两组,每组8头;各分为试验1组和试验2组。其中仔猪和母猪的试验1组接种猪瘟疫苗A,试验2组接种猪瘟疫苗B。疫苗在0 d进行首免,30 d进行二免。每头接种2 mL。仔猪试验1组和试验2组在首免后第15、30、60天各采血,分离血清,检测猪瘟抗体阻断率。母猪试验1组和试验2组在首免后第30、60天分别采血,分离血清,检测猪瘟抗体阻断率。结果表明,不管仔猪还是母猪,接种的两种猪瘟疫苗A和B的免疫效果差异不显著(P0.05),且从总体上来看,两种猪瘟疫苗免疫60 d后都能使仔猪和后备母猪获得良好的保护力。 相似文献
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调查某规模化生猪养殖场种猪猪瘟抗体水平和仔猪母源抗体消退情况,为评估猪瘟疫苗的免疫效果和确定仔猪猪瘟疫苗的首免日龄提供科学参考。本试验使用猪瘟病毒阻断ELISA抗体检测试剂盒对某规模化生猪养殖场种猪及3头抗体水平合格母猪所产并且未经过猪瘟疫苗免疫的仔猪进行抗体检测。结果显示:公猪和后备母猪的猪瘟抗体合格率均为100%;经产母猪的猪瘟抗体合格率为98%。5、10、15、20、25、30、35、40日龄仔猪抗体合格率分别为100%、100%、100%、100%、100%、96%、68%、20%。根据母源抗体的消退情况,仔猪猪瘟的最佳首免时间为35日龄。 相似文献
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在养猪生产中 ,为了获得更好的免疫效果 ,在免疫注射时应做到四不免五注意。四不免妊娠期的母猪不免 :因猪瘟疫苗是活疫苗 (弱毒 )能通过母猪的胎盘 ,引起仔猪死胎、产生木乃伊和产后非典型猪瘟 ,同时易发生免疫应激性流产。正在发病的猪不免 :此时免疫增加应激加重病情的发展 ,重则引起死亡。刚断奶的仔猪不免 :由于刚断奶仔猪受母源抗体的干扰 ,达不到可靠的免疫效果。刚分圈、阉割的仔猪不免 :分圈、阉割对仔猪是一种应激 ,此时免疫可加重应激因素 ,继发其他病。五注意注意疫苗的有效期和稀释后使用时间 :未稀释的猪三联苗 (猪瘟、丹毒、… 相似文献
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为探讨商品化猪病毒性腹泻三联弱毒疫苗和二联灭活疫苗对仔猪免疫效果的影响,通过前期妊娠母猪跟胎免疫,随机选择胎次相近、无病史新生仔猪80头,随机分成3个试验组和1个对照组。对照组不免疫;试验组仔猪于28日龄首免和65日龄二免三联弱毒疫苗或二联灭活疫苗,应用ELISA试剂盒进行血清抗体检测。结果表明:试验组抗体阳性率均高于对照组(P0.01),试验组间抗体阳性率第3组高于第1组和第2组(P0.05),腹泻疫苗在母猪妊娠期接种对仔猪表现出一定的保护力,交替免疫三联弱毒疫苗或二联灭活疫苗效果最佳。本研究为猪病毒性腹泻疫苗免疫提供可行依据。 相似文献
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Depner KR Bouma A Koenen F Klinkenberg D Lange E de Smit H Vanderhallen H 《Veterinary microbiology》2001,83(2):107-120
The efficacy of two marker vaccines against classical swine fever (CSF) was tested in a large scale laboratory trial in several National Swine Fever Laboratories (NSFL) of the EU member states. The vaccines were: BAYOVAC CSF Marker (Vaccine A) from Bayer, Leverkusen, Germany and PORCILIS PESTI (Vaccine B) from Intervet, Boxmeer, The Netherlands. At the NSFL of Belgium, The Netherlands and Germany experiments were carried out to examine the ability of the vaccines to prevent transplacental transmission of CSF virus. In Belgium and The Netherlands pregnant sows were vaccinated once and challenged with virulent CSF virus 14 days later, which was around day 60 of gestation. At the NSFL in Germany sows were vaccinated twice, on days 25 and 46 of pregnancy and were challenged fourteen days after booster vaccination (day 60 of gestation). Apart from minor inflammatory reactions in some sows, no reactions post vaccination were noticed in either vaccine group. Sows vaccinated with Vaccine A were better protected against clinical CSF than sows vaccinated with Vaccine B. The antibody response after vaccination with Vaccine A was more pronounced than after vaccination with Vaccine B. After single vaccination six out of eight sows vaccinated with Vaccine A and all eight sows vaccinated with Vaccine B had viraemic piglets. After double vaccination one out of four litters from sows vaccinated with Vaccine A and four out of five litters from sows vaccinated with Vaccine B were found to be viraemic. However, both vaccines reduced the transmission probability significantly (Vaccine A: P=0.004, Vaccine B: P=0.024) after booster vaccination. However, Vaccine A appeared in this regard more potent as the estimated probability of fetal infections was lower. Nevertheless the risk of virus spreading after vaccination via transplacental transmission is still present and has to be addressed from an epidemiological point of view. 相似文献
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Swine fever. Immunisation of piglets 总被引：4，自引：0，他引：4
P Precausta F Kato A Brun 《Comparative immunology, microbiology and infectious diseases》1983,6(4):281-289
Vaccination against Swine Fever using the CL Chinese strain can be done in 7-day-old piglets if they are born of non-immune sows. The simultaneous weaning and vaccination emphasises the safety of this strain. The excellent immunity observed confirms the immunocompetence of 7-day-old piglets. In piglets born of immune sows and also weaned at 7 days, passive protection can extend beyond the age of 2 months if the sow is vaccinated several months prior to gestation. The immune level of the piglets would seem to depend on the interval between vaccination of the sow and farrowing and can be attributed to the quality of the antibodies transmitted by the colostrum. Piglets born of sows vaccinated 10 months prior to farrowing can be vaccinated as early as 5 weeks; the protection percentage observed at the age of about 6 months is over 80%. A booster injection at this age then confers immunity to future breeders throughout their economic life, i.e. 4 years in the reported experiment. 相似文献
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Casal J Planasdemunt L Varo JA Martín M 《Journal of veterinary medicine. B, Infectious diseases and veterinary public health》2004,51(1):8-11
Several Aujeszky's disease virus (ADV) vaccination protocols of sows were evaluated with regard to the passive protection conferred on piglets in a recently built commercial farm. Three different groups of sows were vaccinated using a Bartha K-61 strain. One group received an inactivated vaccine during pregnancy and the other two groups received attenuated vaccines, either during pregnancy (day 65) or on the seventh day of lactation. At farrowing, sows vaccinated during lactation had lower seroneutralization titres than those vaccinated during pregnancy either with inactivated or attenuated vaccines. Accordingly, their piglets were the ones with lower levels of maternally transferred neutralizing antibodies. At 4 weeks of age, five piglets born of each group of sows were challenged intranasally with a neurotropic strain of ADV. Piglets born of sows vaccinated during pregnancy with inactivated and attenuated vaccines gained 1.50 kg bodyweight and 2.50 kg bodyweight during 7 days, respectively, and did not show clinical signs, while piglets from sows vaccinated during the previous lactation lost 0.60 kg and presented moderate to severe clinical signs of ADV. Vaccination of sows during pregnancy provided more protection against ADV for piglets than sow vaccination before mating. Piglets born from sows vaccinated with attenuated or inactivated vaccines did not present remarkable differences on protection. 相似文献
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Evaluation of the antibody response in pigs vaccinated against Streptococcus suis capsular type 2 using a double-antibody sandwich enzyme-linked immunosorbent assay. 总被引：1，自引：1，他引：0 
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下载免费PDF全文 A double-antibody sandwich enzyme-linked immunosorbent assay (ELISA) was standardized for the detection of specific antibodies following vaccination with Streptococcus suis capsular type 2 bacterins. No statistically significant increase of antibody titers was detected in vaccinated piglets compared to the nonvaccinated control group, even if a minority of piglets demonstrated an important postvaccinal response. Three of four vaccinated sows showed a low antibody response to vaccine and specific immunity was detected in piglets of only one litter of these three sows. Passive protection studies showed that none of the sera from vaccinated piglets were protective for mice whereas serum obtained from hyperimmunized pigs gave protection. 相似文献
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Roesler U Heller P Waldmann KH Truyen U Hensel A 《Journal of veterinary medicine. B, Infectious diseases and veterinary public health》2006,53(5):224-228
The efficacy of a homologous vaccination in preventing infection of suckling piglets with Salmonella (S.) Typhimurium was evaluated after an immunization of pregnant sows using an inactivated herd-specific S. Typhimurium vaccine. Twenty-five pregnant sows were vaccinated three times antepartum. The efficiency of this vaccine regime was assessed by comparison with a control group of 37 sows and their suckling piglets, which were daily treated with enrofloxacin from day 14 antepartum until the day of weaning. From the first day of life until day 142 post-partum, faecal samples of the piglets were collected and analysed for Salmonella shedding. In parallel, systemic antibody responses were monitored using a whole cell-based isotype-specific enzyme-linked immunosorbent assay (ELISA). The bacteriological investigation showed marked effects of vaccination. Salmonella Typhimurium could not be detected in any of the faecal samples of the piglets from the vaccinated sows. In contrast, the piglets of the group with long-time antibiotic treatment shed salmonellae rating to 47.4% of the animals. Furthermore, the offspring from vaccinated sows showed significantly decreased antibody activities of immunoglobulin (Ig)A and IgG. These bacteriological and serological results indicate a significantly lower Salmonella prevalence in piglets of the vaccinated group. As this study shows, the presented strategy of vaccination of pregnant sows with an inactivated Salmonella vaccine seems to be a suitable measure in decreasing Salmonella prevalence in offspring of infected sows. 相似文献
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D Panjevi? M Valci? 《Zentralblatt für Veterin?rmedizin. Reihe B. Journal of veterinary medicine. Series B》1989,36(2):119-122
The possible effect on pig protection after vaccination pregnant sows and their piglets against FMD at various age was examined using the SN test. Three experiments were conducted with three sow in each (8-9 piglets each). In the first experiment sows were not vaccinated but their piglets were vaccinated on 10th, 20th and 60th day of age. In second experiment sows were vaccinated at the end of rest period and in the middle of pregnancy. Pigs from one sow were vaccinated on 10th, from second sow on 20th and from the third sow on the 60th day of age. Pigs which were vaccinated on the 10th and 20th day of age were revaccinated on the 60th day of age. In third experiment sows were vaccinated at the end of the rest period and in the middle of pregnancy. Their piglets were not vaccinated. The conclusion may be drawn that if the epidemiological situation requires, systemic vaccination of all pigs then, on large farms (where pig production is planned) all sows should be vaccinated at the end of the rest period (first vaccination) and on the 55th-60th day of pregnancy. The next vaccination should be done in the middle of the next pregnancy. A vaccination program of piglets, according to our results, should depend on the vaccination program used for their dams. 相似文献
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Martelli P Terreni M Guazzetti S Cavirani S 《Journal of veterinary medicine. B, Infectious diseases and veterinary public health》2006,53(5):229-233
Vaccination with bacterins is an important tool for the control of Mycoplasma hyopneumoniae infection of pigs. Because such vaccination often involves piglets that have suckled M. hyopneumoniae antibody-positive dams it is important to understand the effect of pre-existing (passively acquired) antibody on vaccine-induced immunity. To investigate this issue experimentally, 20 sows that were seronegative for M. hyopneumoniae were selected from a M. hyopneumoniae-infected herd and then randomly allocated to one of four treatment groups (five sows/group): Group A, vaccinated sows/vaccinated piglets; Group B, vaccinated sows/non-vaccinated piglets; Group C, non-vaccinated sows/vaccinated piglets; Group D, non-vaccinated sows/non-vaccinated piglets. Sows (Groups A and B) were vaccinated 14 days before farrowing and seroconverted within the next 14 days. Conversely, none of the non-vaccinated sows was seropositive at farrowing. Piglets (Groups A and C) were vaccinated when they were 7 days of age. Regardless of treatments none of the piglets had any evidence of an active immune response until many of those of Groups A and C and a few of those of Groups B and D seroconverted after it had been shown that at least some pigs of all groups had been naturally infected with a field strain of M. hyopneumoniae. This pattern of immune responsiveness (i.e. the collective results of Groups A, B, C and D) suggested that vaccination of pigs had primed their immune system for subsequent exposure to M. hyopneumoniae, and that passively acquired antibody had little or no effect on either a vaccine-induced priming or a subsequent anamnestic response. According to the statistical analysis sow serological status did not interfere with the antibody response in early vaccinated piglets. In conclusion, the results pointed out that early vaccination of piglets may assist M. hyopneumoniae control independently from the serological status of sows. 相似文献
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为制订合理的猪瘟免疫程序,本研究采用正向间接血凝试验(IHA)对某规模化猪场进行猪瘟免疫监测和分析。结果表明:猪瘟母源抗体的合格率、抗体效价平均值均存在随着仔猪日龄的增长而呈逐渐下降的趋势;35 d～40 d仔猪母源抗体的合格率达78.79%、抗体平均效价为5.97 Log2;仔猪35 d～40 d实施猪瘟首免,其一免抗体合格率和抗体效价均比20 d首免有所提高;同一窝仔猪的猪瘟母源抗体,有11%窝次的猪差距在3个～8个滴度;母猪猪瘟免疫抗体的合格率,一胎母猪稍低,其它经产母猪基本接近;猪瘟抗体效价的平均值随胎龄增加而升高,并且抗体的离散度则随胎龄增加而缩小。因此,在母猪实施与仔猪同时免疫的猪场,40日龄左右是较佳的首免日期。 相似文献
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A vaccine containing inactivated cultures of Bordetella bronchiseptica, toxigenic Pasteurella multocida type D and dermonecrotic P multocida type D toxoid in an oil-in-water adjuvant was given to seven sows, with seven others acting as controls. Half the piglets in each litter were exposed intranasally when four days old to B bronchiseptica and when eight days old to toxigenic P multocida type D. There was considerably less sneezing in the litters of the vaccinated sows and when the piglets were 10 weeks old, only 18 per cent had deformed snouts compared with 74 per cent in the litters of the control sows. The average liveweight gain of the piglets born to vaccinated sows was significantly better (P less than 0.05) between two and 10 weeks of age than that of the piglets born to unvaccinated sows, although there were no significant lower respiratory tract lesions in either group. The conchal atrophy scores were significantly lower (P less than 0.001) in the piglets from the vaccinated sows and were negatively correlated (r = -0.37) with increasing liveweight gain. In the liters of the vaccinated sows, P multocida was not isolated from the nasal passages of the in-contact piglets and from only 7 per cent of those deliberately exposed compared with 65 per cent and 79 per cent, respectively, in the litters of the control sows. P multocida was isolated post mortem from the tonsils of 23 per cent of the piglets of vaccinated sows and from 87 per cent of those from unvaccinated sows. 相似文献
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U. Roesler P. Heller K.‐H. Waldmann U. Truyen A. Hensel 《Zoonoses and public health》2006,53(5):224-228
The efficacy of a homologous vaccination in preventing infection of suckling piglets with Salmonella (S.) Typhimurium was evaluated after an immunization of pregnant sows using an inactivated herd‐specific S. Typhimurium vaccine. Twenty‐five pregnant sows were vaccinated three times antepartum. The efficiency of this vaccine regime was assessed by comparison with a control group of 37 sows and their suckling piglets, which were daily treated with enrofloxacin from day 14 antepartum until the day of weaning. From the first day of life until day 142 post‐partum, faecal samples of the piglets were collected and analysed for Salmonella shedding. In parallel, systemic antibody responses were monitored using a whole cell‐based isotype‐specific enzyme‐linked immunosorbent assay (ELISA). The bacteriological investigation showed marked effects of vaccination. Salmonella Typhimurium could not be detected in any of the faecal samples of the piglets from the vaccinated sows. In contrast, the piglets of the group with long‐time antibiotic treatment shed salmonellae rating to 47.4% of the animals. Furthermore, the offspring from vaccinated sows showed significantly decreased antibody activities of immunoglobulin (Ig)A and IgG. These bacteriological and serological results indicate a significantly lower Salmonella prevalence in piglets of the vaccinated group. As this study shows, the presented strategy of vaccination of pregnant sows with an inactivated Salmonella vaccine seems to be a suitable measure in decreasing Salmonella prevalence in offspring of infected sows. 相似文献