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在生猪养殖过程中,猪繁殖与呼吸综合征病毒、圆环病毒2型与弓形虫混合感染的现象较为常见,临床上主要表现为精神不振、食欲下降、皮毛粗乱、呼吸困难、皮肤淤青、体温升高、早产、流产或产死胎等。相较于单一感染,混合感染的生猪传染性更强,治愈难度更大,死亡率更高,往往会给生猪养殖场造成巨大的损失。笔者结合自身生猪养殖管理及当地生猪疫病调研,介绍了以上3种病原体及混合感染的临床症状、病理变化、实验室诊断方法及防预措施,旨在更好的预防生猪疫病的发生,以促进生猪养殖健康发展。 相似文献
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2002年4月,湖南省某大型规模猪场发生以母猪流产、死胎、弱仔及断奶仔猪发病率、死亡率高为基本特征的疫病,经流行病学调查、临床及病理剖检、实验室检验,诊断为猪圆环病毒病(PMWS)和猪繁殖与呼吸综合征(PRRS)混合发病,采取综合防治措施后,疫情得到一定控制。现报告如下: 相似文献
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生猪弓形虫病是由弓地弓形虫引起的一种人畜共患的原虫病。生猪“蓝耳病”(PRRS)是由繁殖与呼吸综合征病毒引起的一种病毒性传染病。在临床上,上述2种疫病均具有接触性传染、传染性强、传播迅速、危害大等共同特点。笔者曾在基层的规模养殖场就弓形虫病与“猪蓝耳病”混合感染的2起病例进行了临床诊治和探讨。 相似文献
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<正>笔者于2013年9月对浙江宁波地区某猪场发生的猪繁殖与呼吸综合征病毒和支原体混合感染进行了诊治,结果报告如下。1发病情况2013年9月,浙江宁波某猪场生猪存栏600头,从第1例具有明显症状的仔猪发病4周内,共计300头仔猪发病,其中死亡120头,日龄分布不同,最小25日龄,多数为100日龄,发病率50%,死亡率20%。该猪场免疫程序:7、21日龄免疫支原体肺炎灭活疫苗,30日龄免疫高致病性猪蓝耳病灭活疫苗,50、71日龄同时分点注射免疫猪瘟、口蹄疫疫 相似文献
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以猪繁殖与呼吸综合征病毒(Porcine reproduction and respiratory syndrome virus,PRRSV)天津分离株(PRRSV-SJ株)滴鼻感染10日龄~15日龄PRRSV阴性的健康仔猪,采用免疫组织化学法检测PRRSV在仔猪体内靶器官的动态分布,初步探讨PRRSV感染后在仔猪体内的病毒分布规律.结果表明,间接免疫组织化学法发现PRRSV-SJ株感染仔猪后1 d~28 d,均可在仔猪肺、淋巴结、扁桃体、气管、脾、肾等组织中检出PRRSV.感染后1 d~7 d,肺门淋巴结和扁桃体的病毒阳性细胞数量最多,阳性反应强.感染后14 d~28 d,脾脏的病毒阳性细胞数量多,阳性反应强.感染后1d,PRRSV就可在气管、肺门淋巴结和扁桃体检出. 相似文献
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猪繁殖与呼吸综合征病毒变异株感染的诊治 总被引:3,自引:3,他引:0
通过对两猪场送检的发病猪血样或病料进行RT-PCR和血清学检测,并结合临床症状观察和病理剖检,确诊为猪繁殖与呼吸综合征病毒变异株感染,经采取综合防制措施,取得了较好的疗效。 相似文献
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猪繁殖与呼吸综合征(PRRS)是20世纪80年代后期发现的一种新的高度传染性的疾病,临床上以母猪流产、死胎、木乃伊胎、弱仔等繁殖障碍及仔猪呼吸道症状、死亡率高为主要特征.该病自1987年在美国发现以来,至今已蔓延至世界所有养猪国家,给养猪业带来巨大的经济损失. 相似文献
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猪繁殖与呼吸综合征病毒变异株与猪瘟病毒等混合感染的调查与分析 总被引:5,自引:0,他引:5
从华南地区PRRSV变异株(NSP21 594-1 680 bp缺失)核酸阳性的23个规模场、42个个体养殖场和15个散养户,随机采集发病、同群猪血清197份、组织样品115份,调查猪群个体感染PRRSV变异株情况,并对PRRSV变异株核酸阳性样品进行CSFV、PRV、PCV2、SIV检测,调查PRRSV变异株混合感染情况.结果表明:312份样品中224份PRRSV变异株核酸阳性,阳性率71.79%;PRRSV变异株核酸阳性样品中CSFV、PRV、PCV2核酸阳性样品分别为12份、2份,35份,阳性率分别为5.35%、0.89%、15.6%;80个场(群)均未检测到SIV核酸的存在.25个场(群)存在病毒混合感染,其中PRRSV变异株/CSFV、PRRSV变异株/PRV、PRRSV变异株/PCV2二重感染和PRRSV变异株/CSFV/PCV2、PRRSV变异株/PRV/PCV2三重感染猪场(群)百分率分别为5%、1.25%、21.25%和2.5%、1.25%.PRRSV变异株(NSP21594-1680变异)是造成猪场(群)重大损失的直接原因,并可与CSFV、PRV、PCV2等病毒出现混合感染,与PCV2混合感染比率较高. 相似文献
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鸭疫里默氏杆菌病(Riemerella anatipestifer,RA)又称为鸭传染性浆膜炎,是侵害雏鸭的一种急性或慢性败血性传染病.RA主要感染家鸭,1~8周龄鸭均可感染,但2~3周龄的雏鸭最易感,发病率高,一般为60%~70%,有时高达90%. 相似文献
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Outbreaks in Quebec pig farms of respiratory and reproductive problems associated with encephalomyocarditis virus. 总被引:11,自引:0,他引:11
S Dea R Bilodeau R Sauvageau G P Martineau 《Journal of veterinary diagnostic investigation》1991,3(4):275-282
Encephalomyocarditis virus (EMCV) was isolated from tissues of aborted fetuses and weaned and suckling piglets from 4 different pig farms in Quebec. The farms were experiencing reproductive failure in sows of different parities concomitant to respiratory problems in suckling and postweaning piglets. At necropsy, gross lesions were confined to the lung and consisted of pulmonary congestion and edema of various degrees. Lesions of multifocal interstitial to proliferative pneumonia were found in the lungs of these piglets. Bacteriologic examination of various tissues from necropsied pigs yielded no pathogens in most cases. No significant antibody titers against 3 swine viruses (transmissible gastroenteritis virus, porcine parvovirus, and swine influenza virus) and two bovine viruses (bovine viral diarrhea and infectious bovine rhinotracheitis viruses) were detected in the sera of convalescent pigs. The Quebec EMCV isolates were antigenically related to the reference ATCC-VR129 strain of EMCV, as demonstrated by indirect immunofluorescence, serum neutralization (SN), and Western immunoblotting. However, one of the Quebec isolates could be distinguish by SN. EMCV-specific SN antibody titers up to 1:12,800 were detected in thoracic and ascitis fluids of aborted fetuses and in sera of convalescent pigs. A possible pneumotropic EMCV variant in swine may exist. 相似文献
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2006年9月,山东省临沂市某狐场对100只3月龄的幼狐进行犬瘟热灭活疫苗免疫,免疫后第二天30只幼狐突然发病,病狐出现咳嗽、呼吸困难、发热、眼鼻出现卡他性炎症等现象,同时出现贫血、黄疸等症状. 相似文献
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Persistence of porcine reproductive and respiratory syndrome virus in intensive farrow-to-finish pig herds. 总被引:7,自引:0,他引:7
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W B Chung M W Lin W F Chang M Hsu P C Yang 《Canadian journal of veterinary research》1997,61(4):292-298
An epidemiological study of porcine reproductive and respiratory syndrome (PRRS) within pig herds was conducted in 8 intensive farrow-to-finish pig farms. Persistence of PRRS virus (PRRSV) in pig herds was demonstrated by regular postmortem examination on 2 farms for a period of 2 y. Virus isolation and serum neutralization (SN) tests were performed on the sera collected from 9 groups of pigs (10 pigs/group) of various ages on 8 pig farms. Except for 1 farm, isolation rates of PRRSV reached the highest level of 70 to 100% of pigs 6 to 8 wk of age, which coincided with the lowest levels of maternal immunity. In 1 pig herd, sows (39 in total) with SN titers of < or = 1:2, 1:4-1:8, and > or = 1:16 were designated as groups 1, 2, and 3, respectively. Sera were obtained from their progeny (3 pigs randomly selected from each litter) at various ages from 0 to 22 weeks. A positive correlation (r = 0.377, P < 0.001) between the SN titers of sows and those of their progeny (1-week-old piglets) was observed. Pigs at the age of 6 wk, only 7.9% of group 1 pigs compared to 72.4% of group 3 pigs were seropositive. A significant difference (P < 0.01) in the percentage of pigs with PRRSV viremia among the 3 groups was observed, with the lowest level found in group 3 pigs. The isolation rates of PRRSV from serum reached the maximum at the age of 9 wk for all 3 groups. The results indicated that passively acquired serum antibodies conferred a protective effect for piglets; however, loss of passive immunity at various ages of pigs produced susceptible pigs that resulted in PRRSV persistence in the pig herds. Pigs 6 to 9 weeks old were the major reservoir for PRRSV in farrow-to-finish pig herds. 相似文献
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采用流行病学调查、临床症状观察、病理学检查、病毒分离、分离毒株测序以及遗传演化分析的方法,对北京及其周边地区4个猪场剖检的4头猪进行分析。结果:流行病学和临床症状表现为急性高热性传染病;病理学观察为非化脓性脑炎和间质性肺炎等多器官严重的病理变化;RT-PCR和病毒分离确定该疫情的主要病原是猪繁殖与呼吸综合征病毒(PRRSV)。与典型PRRSV感染不同的是:成年猪感染率达50%以上,病死率达80%以上;PRRSV分离株全基因序列分析表明属于PRRSV北美洲型,特别是PRRSV NSP2不连续缺失30个氨基酸,说明此次流行的PRRSV毒株可能为高致病性毒株。 相似文献
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20 0 2年 10月胶东某规模化猪场发生以妊娠母猪流产、产死胎 ,仔猪出现以呼吸道症状为主的疾病 ,经流行病学分析、症状观察、病理剖检、病毒分离及ELISA、 PCR检测确诊为猪繁殖与呼吸综合征(porcine reproductive and respiratory syndrome,PRRS)。现将该场 PRRS的诊治情况报告如下。1 发病情况及临床症状该场为自繁自养猪场 ,来诊时共存栏大小猪 90 0余头。母猪 12 4头 ,处于妊娠期的有 5 2头 ,其中初产母猪 15头。中大肉猪 4 0 0多头。据畜主介绍 ,该场2 0 0 2年 9月初即有 6头母猪分别于预产期前 3~ 7天左右开始流产 ,在这之前 … 相似文献