中国畜牧兽医 ›› 2023, Vol. 50 ›› Issue (3): 1271-1278.doi: 10.16431/j.cnki.1671-7236.2023.03.041

• 基础兽医 • 上一篇    下一篇

华南虎子宫内膜炎摩氏摩根菌分离鉴定及生物学特性研究

胡依凡1, 马敬华2, 白思琦3, 翟祎梦1, 刘建勋2, 宋厚辉1, 杨永春1   

  1. 1. 浙江农林大学动物科技学院·动物医学院, 浙江省畜禽绿色生态健康养殖应用技术研究重点实验室, 动物健康互联网检测技术浙江省工程研究中心, 浙江省动物医学与健康管理国际科技合作基地, 中澳动物健康大数据分析联合实验室, 杭州 311300;
    2. 杭州野生动物世界, 杭州 311400;
    3. 山东畜牧兽医职业学院, 潍坊 261000
  • 收稿日期:2022-09-09 出版日期:2023-03-05 发布日期:2023-03-02
  • 通讯作者: 宋厚辉, 杨永春 E-mail:songhh@zafu.edu.cn;yyc@zafu.edu.cn
  • 作者简介:胡依凡,E-mail:yifan092@gmail.com;马敬华,E-mail:313699382@qq.com。
  • 基金资助:
    浙江省重点研发计划项目(2019C02052);国家自然科学基金(32102671);国家级大学生创新创业训练计划项目(202210341047);浙江农林大学2021年校级学生科研训练项目(2021KX0210)

Isolation,Identification and Biological Characteristics Analysis of Morganella morganii from Endometritis of South China Tiger (Panthera tigris amoyensis)

HU Yifan1, MA Jinghua2, BAI Siqi3, ZHAI Yimeng1, LIU Jianxun2, SONG Houhui1, YANG Yongchun1   

  1. 1. Key Laboratory of Applied Technology on Green-Eco-Healthy Animal Husbandry of Zhejiang Province, Provincial Engineering Research Center for Animal Health Diagnostics & Advanced Technology, Zhejiang International Science and Technology Cooperation Base for Veterinary Medicine and Health Management, China Australia Joint Laboratory for Animal Health Big Data Analytics, College of Animal Science and Technology & College of Veterinary Medicine, Zhejiang A&F University, Hangzhou 311300, China;
    2. Hangzhou Safari Park, Hangzhou 311400, China;
    3. Shandong Vocational Animal Science and Veterinary College, Weifang 261000, China
  • Received:2022-09-09 Online:2023-03-05 Published:2023-03-02

摘要: 【目的】对杭州野生动物世界1例成年雌性华南虎(Panthera tigris amoyensis)子宫内膜炎病例的病原进行分离鉴定及生物学特性研究。【方法】无菌采集患虎子宫分泌物进行细菌分离培养、形态观察、梅里埃Vitek® 2 COMPACT系统的生化鉴定以及16S rDNA序列分析,采用小鼠腹腔接种模型检测临床分离株致病性,并通过药敏纸片扩散法K-B鉴定该菌对50种药物的敏感性,采用筛选的敏感药物联合对症治疗,持续观察疾病是否复发及其产仔情况。【结果】从患虎子宫分泌物中获得1株革兰阴性短棒状杆菌;梅里埃Vitek® 2 COMPACT系统革兰阴性卡鉴定结果显示,该临床分离株为摩氏摩根菌,菌株可发酵葡萄糖,分解甘露糖、D-葡萄糖,且尿素酶、磷酸酶、鸟氨酸脱羧酶、γ-谷氨酰转移酶反应呈阳性;序列比对分析发现,16S rDNA序列与摩氏摩根菌的相似性最高,达99%以上,进一步表明该菌为摩氏摩根菌,并命名为HNH2019;药敏结果显示,该菌多重耐药,对多黏菌素B、丁胺卡那、复方新诺明、麦迪霉素、四环素、头孢哌酮等33种药物呈不同程度的耐药,对头孢噻肟、头孢曲松和头孢西丁等6种药物中度敏感,对妥布霉素、洛美沙星、依诺沙星和氟苯尼考等11种药物敏感;小鼠致病性分析结果显示,该分离株腹腔接种ICR小鼠的半数致死量为1×107.5 CFU;采用敏感药物治疗后,该虎痊愈且连续3年未复发,截至2022年9月,该母虎已经多次怀孕并合计生产了5仔。【结论】本研究分离鉴定到1株华南虎源多重耐药致病性摩氏摩根菌,经筛选的敏感药物治疗,该虎子宫内膜炎痊愈未复发,研究结果为同类疫病防治提供了病例参考和数据支持,提示应重视摩氏摩根菌对动物的潜在危害。

关键词: 华南虎; 摩氏摩根菌; 子宫内膜炎; 耐药

Abstract: 【Objective】 The pathogen of a case of endometritis of an adult female South China tiger (Panthera tigris amoyensis) in Hangzhou Safari Park was isolated and identified,and its biological characteristics were studied.【Method】 The uterine secretions of the tiger were collected aseptically and the pathogenic bacteria were identified by using bacterial isolation and purification,morphological observation,biochemical identification of Merier Virtek® 2 COMPACT system,and 16S rDNA sequence analysis.The pathogenicity of the clinical isolate was detected by intraperitoneal inoculation model of mice,and the sensitivity of the isolates to 50 drugs was identified by the universal Kirby-Bauer (K-B) test.The selected sensitive drugs were combined with symptomatic treatment to continuously observe whether the disease recurred and the birth situation.【Result】 A Gram-negative short rod-shaped bacillus isolate was obtained from the uterine secretion of the tiger.The identification result of Merrier Vitek® 2 COMPACT system’s Gram negative card showed that the clinical isolated strain was Morganella morganii,which could ferment glucose,decompose mannose,D-glucose and urease,phosphatase,ornithine decarboxylase γ-glutamyltransferase reaction was positive.The sequence comparison analysis showed that the 16S rDNA sequence had the highest similarity with Morganella morganii,more than 99%.The results further showed that the bacterium was Morganella morganii,and was named HNH2019.The drug sensitivity results showed that the bacterium was multi resistant to 33 drugs,including polymyxin B,amikacin,cotrimoxazole,medimycin,tetracycline and cefoperazone,moderately sensitive to 6 drugs,including cefotaxime,ceftriaxone and cefoxitin,and sensitive to 11 drugs,including tobramycin,lomefloxacin,enoxacin and florfenicol.The results of mouse pathogenicity analysis showed that the median lethal dose of the isolate inoculated intraperitoneally in ICR mice was 1×107.5 CFU.After treatment with sensitive drugs,the tiger recovered and did not recur for three consecutive years.By September 2022,the female tiger had been pregnant many times and had given birth to five cubs in total.【Conclusion】 In this study,a Morganella morganii isolate was proposed as a potential pathogen of the South China tiger.After treatment with sensitive drugs selected by drug sensitivity test,the tiger recovered from endometritis without recurrence.The results of the study provided case reference and data support for the prevention and control of similar diseases,suggesting that attention should be paid to the potential harm of Morganella morganii to animals.

Key words: South China tiger (Panthera tigris amoyensis); Morganella morganii; endometritis; drug resistance

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