共查询到19条相似文献，搜索用时 265 毫秒
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猪气喘病群防群治诊断 总被引：1，自引：0，他引：1
猪气喘病又称地方流行性肺炎、支原体肺炎．是由猪肺炎支原体引起的猪的一种慢性、接触性传染病。该病多呈慢性经过，常见有其他病菌继发感染，该病也是规模化猪场常见的疾病之一，也是SPF猪场要求净化的疾病之一。其主要临床诊断症状为咳嗽和气喘。呼吸困难，肺有融合性支气管肺炎病变。 相似文献
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猪支原体肺炎俗称猪气喘病,是目前乃至今后一段时间影响养猪业的重要疾病。该病的防治是控制猪场呼吸道综合征难题的关键。因此,有必要了解该病的病原特征、临床症状以及检测方法等,把有效预防和控制、净化支原体肺炎作为一项重要的工作。 相似文献
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猪支原体肺炎(Mycoplasmal pneumonia of Swine,MPS),是由猪肺炎支原体(Mycoplasma hyopneumoniae,Mhp)引起猪以咳嗽和气喘为主要症状的慢性接触性呼吸道传染病.各年龄段猪对该病均敏感,该病大多数是慢性经过,主要表现为咳嗽、呼吸困难,解剖可见肺组织病变或大理石病变.其主要危害是引起猪的生长受阻及饲料转化率大幅下降,患病猪长期生长发育不良,目前是全世界流行最广,最难净化,被认为是威胁全球养猪业的主要传染病之一. 相似文献
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猪气喘病是集约化养猪场常见的疫病之一,也是SPF猪场要求净化的疫病.该病是由肺炎支原体引起的猪的一种慢性、接触性传染病. 相似文献
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目的：通过对某猪场母猪实施猪瘟控制（净化）方案,研究分析能否提高该猪场的母猪分娩率。方法：采用酶联免疫吸附试验（ELISA）对龙岩市某规模化猪场的母猪进行猪瘟抗体检测,对猪瘟抗体检测不合格（阻断率小于40%）且同时满足两条及以上淘汰标准的种猪实行淘汰以达到猪瘟控制（净化）目的,并对猪瘟控制（净化）前后配种分娩结果进行收集、统计。结果：猪瘟控制（净化）后,母猪返情、流产、空胎数量减少,分娩率明显提升。结论：猪瘟控制（净化）可以提高母猪分娩率,实行猪瘟控制（净化）对规模化猪场具有重大意义。 相似文献
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Two herds of swine, believed to be free from mycoplasmal pneumonia of swine (MPS) based upon negative Mycoplasma hyopneumoniae microtiter complement fixation test (CFT) results, subsequently exhibited clinical signs of MPS.Lungworms (Metastrongylus spp.) were common to both herds. The possibility that lungworms could serve as a reservoir for M. hyopneumoniae was investigated. Lungworm-larvae-infected earthworms, collected from each of the farms, were fed to swine free of lungworms and MPS. This procedure resulted in lungworm infection in the recipient pigs, but failed to produce pneumonic lesions or CFT antibody titers against MPS. 相似文献
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混合感染背景下的猪气喘病较难控制,介绍了猪气喘病的发病特点,常用药物的敏感度评价、疫苗效果评价和猪场猪气喘病的检查检测方法,结合作者实际经验强调了饲养管理要点,指出了种猪场净化猪气喘病的方法步骤,为混合感染下控制猪气喘病提供参考。 相似文献
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Akiko Sakuma Shizuka Sugawara Hikaru Hidaka Mitsuru Nakajo Yoshihito Suda Tomoyuki Shimazu Michael T. Rose Megumi Urakawa Tao Zhuang Guoqi Zhao Kouichi Watanabe Tomonori Nochi Haruki Kitazawa Kazuo Katoh Keiichi Suzuki Hisashi Aso 《Animal Science Journal》2020,91(1)
Mycoplasma pneumonia of swine (MPS) is caused by Mycoplasma hyopneumoniae (M.hp) and is a common chronic respiratory disease of pigs. Recently, a genetically selected variant of the Landrace pig (Miyagino L2) has a lower incidence of pulmonary MPS lesions. We investigated the pathological and immunological characteristics of MPS resistance in these pigs (n = 24) by comparing with the normal landrace pig (control: n = 24). The pathological MPS lung lesion score in MPS‐selected landrace pigs was significantly lower than in the control. The gene expression of interleukin (IL)‐12p40, which acts as a chemoattractant and a component of the bioactive cytokines IL‐12 and IL‐23, was significantly higher at the hilar lymph nodes, lung, and spleen in MPS‐selected landrace pigs than in control landrace pigs, and these were negatively correlated with the macroscopic MPS lung lesion score. In summary, we demonstrate that resistance against MPS in Miyagino L2 pigs is associated with IL‐12p40 up‐regulation, in comparison with normal landrace pigs without the MPS vaccine. In addition, a comparative study of macroscopic MPS lung lesions and IL‐12p40 gene expression in lung and hilar lymph nodes may lead to beneficial selection traits for the genetic selection for MPS resistance in pigs. 相似文献
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Correlated responses of respiratory disease and immune capacity traits of Landrace pigs selected for Mycoplasmal pneumonia of swine (MPS) lesion 
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下载免费PDF全文 Toshihiro Okamura Kouki Maeda Wataru Onodera Hiroshi Kadowaki Chihiro Kojima‐Shibata Eisaku Suzuki Hirohide Uenishi Masahiro Satoh Keiichi Suzuki 《Animal Science Journal》2016,87(9):1099-1105
Five generations of Landrace pigs selected for average daily gain, backfat thickness, Mycoplasmal pneumonia of swine (MPS) lesion score, and plasma cortisol levels, was executed to decrease the MPS lesion score. Genetic parameters and correlated genetic responses for respiratory disease and peripheral blood immune traits were estimated in 1395 Landrace pigs. We estimated the negative genetic correlation of MPS lesion score with phagocytic activity (PA) at 7 weeks of age (‐0.67). The breeding values of PA at 7 weeks of age and 105 kg body weight and the correlated selection response of the ratio of granular leukocytes to lymphocytes at 105 kg body weight were significantly increased, and sheep red blood cell‐specific antibody production (AP) was significantly decreased in a selection‐dependent manner. Increasing of natural immunological indicators (e.g. PA) and decreasing of humoral immunological indicator (e.g. AP) were observed due to genetically decreasing MPS lesion score. 相似文献
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牛病毒性腹泻病毒侵染细胞机制的研究进展 总被引：2，自引：0，他引：2
牛病毒性腹泻病毒(BVDV)是反刍动物和猪体内广泛存在的危害动物健康的重要病原体.BVDV感染牛后主要引起牛的持续性感染、免疫耐受、免疫抑制、繁殖障碍及急慢性黏膜病等临床症状,给养牛业造成重大的损失.其致病机理非常复杂,给该病的治疗和根除带来极大的困难.随着分子病毒学研究的发展以及对猪瘟病毒和黄病毒科其他成员的研究,人们在BVDV分子水平和细胞水平的研究方面也取得了一些进展.就此,作者从BVDV入侵细胞、在细胞内的复制以及与宿主蛋白分子相互作用等方面进行综述,有助于阐明BVDV致病和在体内持续存活的机制,为该病的防治和疫苗研发提供新的思路和对策. 相似文献
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Correlated response of peripheral blood cytokines with selection for reduced mycoplasma pneumonia of swine lesions in Landrace pigs 下载免费PDF全文
下载免费PDF全文 Takumi Sato Toshihiro Okamura Chihiro Kojima‐Shibata Hiroshi Kadowaki Eisaku Suzuki Hirohide Uenishi Keiichi Suzuki 《Animal Science Journal》2016,87(4):477-483
Mycoplasma pneumonia of swine (MPS) is responsible for significant economic losses in the swine industry. We selected Landrace pigs for reduced MPS pulmonary lesions over five generations, and measured concentrations of the following cytokines: interleukin (IL)‐10, IL‐13, IL‐17, tumor necrosis factor (TNF)‐α and interferon (IFN)‐γ to estimate their correlation with MPS lesions. Sheep red blood cells (SRBC) were injected twice intramuscularly at 70 and 95 kg body weight. Blood serum samples were collected after 1 week of secondary SRBC inoculation and cytokine concentrations were analyzed by ELISA. Genetic parameters and breeding values were estimated. The heritability estimates of IL‐10, IL‐13, IL‐17, TNF‐α and IFN‐γ were 0.20 ± 0.06, 0.12 ± 0.06, 0.27 ± 0.07, 0.20 ± 0.10 and 0.05 ± 0.03, respectively. Genetic correlations of IL‐17 and TNF‐α with pulmonary MPS lesions were high (‐0.86 ± 0.13 and 0.69 ± 0.29, respectively) and those of IFN‐γ and IL‐13 with MPS lesions were moderately negative (‐0.45). Through selection, the breeding values of IL‐17 and IFN‐γ increased substantially and those of TNF‐α decreased. These results suggest that innate and cellular immunity are more important for the suppression of pulmonary lesions in MPS than humoral‐mediated immunity, such as antibody response. 相似文献