畜牧兽医学报 ›› 2015, Vol. 46 ›› Issue (10): 1858-1866.doi: 10.11843/j.issn.0366-6964.2015.10.020

• 临床兽医 • 上一篇    下一篇

黄芪多糖和甲砜霉素影响ALV-J 对SPF鸡致病性的分析

王广文1,吕林1,王超2,张振东1,程子龙1,屈亚锦1,刘思当1*   

  1. (1.山东农业大学动物科技学院,泰安 271018;2.泰安出入境检验检疫局,泰安 271018)
  • 收稿日期:2014-12-23 出版日期:2015-10-23 发布日期:2015-10-23
  • 通讯作者: 刘思当,E-mail:liusid@sdau.edu.cn
  • 作者简介:王广文(1989-),男,山东蓬莱人,硕士生,主要从事动物临床病理学研究,E-mail:wohenaiguo1989@163.com
  • 基金资助:

    公益专项基金(31172296)

Analysis of Astragalan and Thiamphenicol Affecting ALV-J Pathogenicity on SPF Chicken

WANG Guang-wen1,LÜ Lin1,WANG Chao2,ZHANG Zhen-dong1,CHENG Zi-long1,QU Ya-jin1,LIU Si-dang1*   

  1. (1.Animal Science and Technology of Shandong Agricultural University,Tai’an 271018,China;2.Tai’an Entry-Exit Inspection and Quarantine Bureau,Tai’an 271018,China)
  • Received:2014-12-23 Online:2015-10-23 Published:2015-10-23

摘要:

为验证育雏早期应用黄芪多糖及甲砜霉素对ALV-J先天性感染雏鸡发病作用的影响,通过5日龄SPF鸡胚卵黄囊接种1 000 TCID50 ALV-J,鸡胚出壳后随机分为3组,两试验组分别定期口服黄芪多糖和甲砜霉素,一组作为病毒感染对照。对试验雏鸡泄殖腔排毒规律、病毒血症、疫苗免疫水平、免疫器官指数、体重、肿瘤发生率、肿瘤类型等进行动态测定,评估黄芪多糖和甲砜霉素对雏鸡先天感染ALV-J发病作用的影响。结果表明,两种药物对ALV-J病毒血症、ALV-J抗体及疫苗免疫抗体的产生无显著影响。黄芪多糖组与病毒感染对照组体重差异不显著;甲砜霉素组早期体重明显高于其他两组,但后期体重却明显低于另外两组。甲砜霉素组育雏早期血液中白细胞和淋巴细胞的水平显著低于另外两组,60日龄后脾和法氏囊的免疫器官指数显著降低,与另外两组差异显著。肿瘤发生率以甲砜霉素组最高,达28.57%(10/35),其次是病毒感染对照组,为20%(7/35),黄芪多糖组最低,仅为11.43%(4/35)。另外,甲砜霉素组肿瘤类型多,出现血管瘤、髓样细胞瘤、淋巴肉瘤、纤维肉瘤和腺癌,并且肿瘤进展快,病变重。育雏早期应用甲砜霉素会导致雏鸡免疫抑制,促进ALV-J的致瘤作用,患病鸡肿瘤呈多样化特征。黄芪多糖对ALV-J的致病性有一定的抑制作用,但未发现对病毒血症的影响。两种药物对ALV-J的致病作用的影响机制有待于进一步研究探讨。

Abstract:

In order to further verify the influence of early application of astragalan and thiamphenicol on the ALV-J congenital infection,5-day-old-SPF chickens were inoculated with 1000 TCID50 ALV-J through the yolk sac and count the mortality of the SPF embryos during incubation.Then,105 SPF chickens at 1 day of age were randomly assigned into three groups of 35 each.The experimental group was respectively given with astragalan(100 mg•L-1) and thiamphenicol(100 mg•L-1) lasting for five days,three times with 5 days of the internal,and the last group was the virus infected control.A comprehensive evaluation about astragalan and thiamphenicol on the influence of ALV-J congenital infection was carried out by cloaca detoxification and viremia of ALV-J,vaccine immunization level of ND,the immune organ index and body weight,tumor incidence and histopathological examination.The results indicated that the two drugs had no significant influence on viremia elimination,occurrence of ALV-J antibody and the increase of ND antibody.Similarly,the weight difference between astragalus group and virus infected group was not significant at the whole experimental process;Although early weight of thiamphenicol group was obviously higher than that of other two groups,its weight was lower than that of other two groups after 60 d.The significant deduction of peripheral blood leucocyte/lymphocyte at 6 d and immune organ index of the spleen and bursa of Fabricius at 42 d in thiamphenicol group was observed lower than those of other two groups.Furthermore,tumors incidence at thiamphenicol group was the highest,28.57%(10/35),followed by infection control group’s 20%(7/35) and astragalus group’s 11.43%(4/35),and tumor types also appeared diversification including the hemangioma,myelocytomas,lymphatic sarcoma,fibrosarcoma and adenocarcinoma.Therefore,the early application of thiamphenicol can lead to immunosuppression,promote the tumorigenic effect and diversify the tumor types of ALV-J.Although the astragalus can reduce the pathogenicity of ALV-J,it can’t contribute to the elimination of viremia.

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