青黛散加减对猫杯状病毒感染的疗效研究,兽医硕士论文.docx
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1、青黛散加减对猫杯状病毒感染的疗效研究,兽医硕士论文中文内容摘要 猫杯状病毒感染是由猫杯状病毒FCV所引起的一种病毒性传染病,临床表现为发热、口腔溃疡、打喷嚏、眼鼻分泌物、结膜炎等。猫杯状病毒在世界范围内流行,多发于猫聚集的场所。当前没有针对猫杯状病毒感染的特异性药物,且国内没有理想的疫苗。临床上普遍应用干扰素和抗生素进行治疗,但治疗效果不理想。而当代药理学研究证明,中药具有良好的抗菌、抗病毒作用。青黛散,首见于武之望(济阳纲目,由青黛、黄连、黄柏、薄荷、桔梗、儿茶组成,具有清热解毒、宣肺止咳、收敛生肌的成效。当前应用青黛散治疗猫杯状病毒感染的治疗效果未见报道,因而,本实验建立了一个稳定的猫杯状
2、病毒感染模型,探究青黛散加减对猫杯状病毒感染的治疗效果,为临床上治疗猫杯状病毒感染提供新的方式方法。 通过滴鼻方式以109.67TCID50/m L的1 m LFCV病毒液接种于6-12月龄猫,建立了稳定的猫杯状病毒感染模型。攻毒后48 h,实验猫出现发热、咳嗽等临床异常感觉和状态,扁桃体和肺部产生病理变化。 成功建立猫杯状病毒感染模型后,对青黛散有效剂量进行挑选。设定三个不同剂量青黛散治疗组,分别为高剂量2 g/kg治疗组n=4,中剂量1 g/kg治疗组n=4和低剂量0.5 g/kg治疗组n=4。将临床异常感觉和状态评分、体温变化、体重变化、剖检及组织病理变化等作为治疗效果断定指标。结果表示
3、清楚,青黛散各剂量组对猫杯状病毒感染都有不同程度的治疗效果。华而不实青黛散中剂量1 g/kg治疗组的效果最好,能够显着减轻临床异常感觉和状态和扁桃体病理变化。对各组实验猫进行炎性细胞因子表示出水平的测定,结果表示清楚猫感染FCV后,IL-6表示出显着升高;治疗后,青黛散中剂量1 g/kg治疗组的IL-1和IFN-表示出显着上升。 最后收集了8例临床病例,在上述实验的基础上,选用1 g/kg青黛散进行治疗。在临床治疗中,青黛散有良好的治疗效果,有效率可达87.5%。结果表示清楚,青黛散有潜力成为临床上治疗猫杯状病毒感染的药物。 本文关键词语 : 猫杯状病毒感染;青黛散;治疗效果。 Abstrac
4、t Feline calicivirus infection is a viral infectious disease caused by feline calicivirus (FCV). The clinical manifestations are fever, oral ulcers, sneezing, eye and nose secretions, conjunctivitisand so on. Feline calicivirus is prevalent worldwide, mostly in places where cats gather. At present,t
5、here is no specific medicine for feline calicivirus infection, and there is no ideal vaccine in China. Interferon and antibiotics are commonly used in clinical treatment, but the therapeutic effect is notideal. Modern pharmacological studies have proved that Chinese medicine has good antibacterialan
6、d antiviral effects. Indigo Naturalis Powder, first seen in Wuzhiwang s Jiyang Compendium , iscomposed of Indigo Naturalis, Coptis, Cork, Peppermint, Platycodon grandiflorum, and catechu. Ithas the effects of clearing away heat and detoxifying, relieving lungs and relieving cough,eliminating phlegm
7、and pus, and astringent muscle growth. At present, there is no report on thetherapeutic effect of Qingdai powder in the treatment of cat calicivirus infection. Therefore, thisexperiment established a stable feline calicivirus infection model to explore the therapeutic effectof Qingdai powder on cat
8、calicivirus infection. Provide a new method for the treatment of catcalicivirus infection. A stable feline calicivirus infection model was established by inoculating cats aged 6-12months with 1 m L FCV virus solution of 109.67TCID50/m L by nasal drops.48 hours after infection,the experimental cat wi
9、ll have clinical symptoms such as fever, and pathological changes in thetonsils and lungs. After successfully establishing the feline calicivirus infection model, the effective dose ofQingdai powder was screened. Set three different doses of Qingdai powder treatment groups,namely high-dose (2 g/kg)
10、treatment group(n=4), middle-dose (1 g/kg) treatment group(n=4) andlow-dose (0.5 g/kg) treatment group(n=4). The clinical symptom score,body temperature,bodyweight,necropsy and histopathological changes were used as indicators of treatment effect. Theresults show that the various dose groups of Qing
11、dai powder have varying degrees of therapeuticeffect on cat calicivirus infection. The middle dose group of Qingdai powder(1 g/kg) treatmenthad the best therapeutic effect, which could significantly reduce clinical symptoms andpathological changes of tonsils. The expression levels of IL-1, IL-6 and
12、IFN- were measured forthe blank control group, model group, Qingdai powder high, medium and low dose groups andmodel group. The results showed that IL-6 increased significantly after the cat was infected withFCV After treatment, the IL-1 and IFN- in the middle-dose (1 g/kg) treatment group of Qingda
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