《中国畜牧兽医》---唯一指定的官方网站 ›› 2015, Vol. 42 ›› Issue (9): 2481-2486.doi: 10.16431/j.cnki.1671-7236.2015.09.039

• 疾病防治 • 上一篇    下一篇

牛呼吸道疾病综合征病例的病原分析

马春霞1,2, 李军1,2, 覃勇3, 钟舒红1,2, 陶立1,2, 彭昊1,2, 兰美益1,2, 杨威1,2, 陈泽祥1,2, 胡帅1,2, 李常挺4, 赵小红5   

  1. 1. 广西兽医研究所, 南宁 530001;
    2. 广西畜禽疫苗新技术重点实验室, 南宁 530001;
    3. 百色市动物疫病预防控制中心, 百色 533000;
    4. 隆安县动物疫病预防控制中心, 隆安 532700;
    5. 融水县动物疫病预防控制中心, 融水 545300
  • 收稿日期:2015-03-04 出版日期:2015-09-20 发布日期:2015-09-25
  • 通讯作者: 陈泽祥 E-mail:xjszexiang@163.com
  • 作者简介:马春霞(1980-),女,黑龙江富锦人,硕士,助理研究员,研究方向:动物疫病防控与病原分子生物学,E-mail:machunxia1213@163.com;李军(1971-),男,广东梅县人,博士,副研究员,研究方向:动物疫病防控与病原分子生物学,E-mail:Jlee9981@163.com
  • 基金资助:

    广西畜禽疫苗新技术重点实验室专项(14-045-31-A-6);广西基本科研业务费(桂科专项15-3);广西水产畜牧科技推广应用项目(桂渔牧科201528003)

Pathogen Analysis of Bovine Respiratory Disease Complex

MA Chun-xia1,2, LI Jun1,2, QIN Yong3, ZHONG Shu-hong1,2, TAO Li1,2, PENG Hao1,2, LAN Mei-yi1,2, YANG Wei1,2, CHEN Ze-xiang1,2, HU Shuai1,2, LI Chang-ting4, ZHAO Xiao-hong5   

  1. 1. Guangxi Veterinary Research Institute, Nanning 530001, China;
    2. Guangxi Key Laboratory of Animal Vaccines and New Technology, Nanning 530001, China;
    3. Animal Disease Prevention and Control Center of Baise, Baise 533000, China;
    4. Animal Disease Prevention and Control Center of Longan, Longan 532700, China;
    5. Animal Disease Prevention and Control Center of Rongshui, Rongshui 545300, China
  • Received:2015-03-04 Online:2015-09-20 Published:2015-09-25

摘要: 本试验旨在查清广西某牛场1起牛呼吸道疾病综合征(BRDC)病例的病原,指导牛场进行疾病防控。采取现场调查、临床症状与病理变化、病原分离鉴定等方法对病例病原进行分析,根据病原药敏试验结果进行治疗。从病例的肺脏组织中分离到1株支原体和1株革兰氏阴性致病杆菌。支原体分离株在PPLO固体培养基上可见典型的"煎蛋样"菌落,PCR扩增出牛支原体oppF基因特异性的448 bp目的片段,其oppF基因序列与美国分离的牛支原体国际标准株PG45的核苷酸序列同源性为98.4%。革兰氏阴性细菌分离株生化特性符合黏质沙雷氏菌特性,其16S rRNA基因PCR扩增出1 400 bp的目的片段,测序结果与GenBank上登录的黏质沙雷氏菌的核苷酸序列同源性达到99.0%,对小鼠具有致病性。牛支原体和黏质沙雷氏菌分离株均对壮观霉素、阿奇霉素、阿米卡星、庆大霉素和新霉素高度敏感,用高敏药物壮观霉素联合地塞米松等相关措施进行治疗,收到良好效果。结果表明,引起这次牛呼吸道疾病综合征的病原为牛支原体和黏质沙雷氏菌。

关键词: 牛呼吸道疾病综合征(BRDC); 病原分析; 牛支原体; 黏质沙雷氏菌; 混合感染

Abstract: To investigate the pathogen of bovine respiratory disease complex (BRDC) of a dairy farm in Guangxi, a strain of Mycoplasma and a strain of gram-negative pathogenic bacterium were isolated and identified by the means of field surveys, clinic observation, pathological examination, isolation studies and so on.Treatments were taken according to drug sensitivity test results.The Mycoplasma strain, growing on PPLO medium, formed typical "fried egg" colonies.A 448 bp of oppF fragment was amplified by PCR from the strain and had 98.4% nucleotide identity with Mycoplasma bovis reference isolate PG5 of USA.The biochemical features of the gram-negative bacterial isolate were same with Serratia marcescens.The PCR amplified 16S rDNA of the gram-negative pathogenic bacterium strain was 1 400 bp.It shared 99.0% nucleotide identity with other Serratia marcescens reference strains obtained from GenBank.Animal experiment showed that the gram-negative pathogenic bacterium isolate could cause the mice to die.The drug sensitivity tests showed all isolates were sensitive to spectinomycin, azithromycin, amikacin, gentamicin and neomycin.It was effective to treat with dexamethasone and spectinomycin.Pathogen analysis and drug treatment showed that the BRDC was caused by Mycoplasma bovis and Serratia marcescens.

Key words: bovine respiratory disease complex (BRDC); pathogen analysis; Mycoplasma bovis; Serratia marcescens; mixed infection

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