|本期目录/Table of Contents|

[1]马芳,周明旭,张金秋,等.苏北地区奶牛场无乳链球菌分离株毒力分析[J].江苏农业科学,2021,49(5):142-149.
 Ma Fang,et al.Virulence analysis of Streptococcus agalactiae isolates from dairy farms in northern Jiangsu[J].Jiangsu Agricultural Sciences,2021,49(5):142-149.
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苏北地区奶牛场无乳链球菌分离株毒力分析(PDF)
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《江苏农业科学》[ISSN:1002-1302/CN:32-1214/S]

卷:
第49卷
期数:
2021年第5期
页码:
142-149
栏目:
畜牧兽医与水产蚕桑
出版日期:
2021-03-05

文章信息/Info

Title:
Virulence analysis of Streptococcus agalactiae isolates from dairy farms in northern Jiangsu
作者:
马芳123周明旭12张金秋12杨世芳12卢宇12邓碧华12
1.江苏省食品质量安全重点实验室-省部共建国家重点实验室培育基地/江苏省农业科学院动物免疫工程研究所/
国家兽用生物制品工程技术研究中心,江苏南京 210014;
2.江苏省动物重要疾病与人畜共患病防控协同创新中心,江苏扬州 225009; 3.江苏大学食品与生物工程学院,江苏镇江 212013
Author(s):
Ma Fanget al
关键词:
无乳链球菌毒力因子:生物被膜黏附胞内存活能力奶牛场苏北地区
Keywords:
-
分类号:
S852.6
DOI:
-
文献标志码:
A
摘要:
奶牛乳腺炎导致奶牛产奶量下降和乳制品质量降低,是奶牛养殖业重要的经济性疾病,在全球范围内造成巨大经济损失。选取苏北奶牛场3株代表性无乳链球菌分离株,SAG-FX17分离自临床型乳腺炎、CM31分离自隐性乳腺炎和CM41b分离自隐性发展为临床型乳腺炎奶牛乳汁,研究比较3株细菌生长特性、毒力因子分布、形成生物被膜能力及其对奶牛乳腺上皮细胞的黏附、侵袭和胞内存活能力。试验结果表明,3株分离株血清型均为Ⅰa型,2b型菌毛,gapC基因和cylE基因阳性,但仅SAG-FX17的α相关蛋白家族为Alp1型,其他2株为未定型。研究发现 SAG-FX17 与奶牛乳腺上皮细胞(Mac-T)共孵育时生成生物被膜能力明显增强,且该菌对Mac-T细胞黏附率为525%,显著高于CM31和CM41b。侵袭试验结果表明,3株细菌侵袭到细菌内部的能力很低,但侵袭到细胞内的细菌具有一定存活能力,侵入细胞4 h 3株分离株SAG-FX17、CM31、CM41b存活率分别为24%、18%、86.7%。综上所述,无乳链球菌在奶牛乳腺上皮细胞表面形成生物被膜及其在胞内存活能力是影响细菌致病性的重要因素。
Abstract:
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相似文献/References:

[1]陈杰,魏勇,王晨豫,等.新疆部分地区牛源无乳链球菌主要毒力基因和耐药基因的检测与序列分析[J].江苏农业科学,2022,50(22):171.
 Chen Jie,et al.Detection and sequence analysis of main virulence genes and drug resistance genes of bovine Streptococcus agalactiae in some areas of Xinjiang[J].Jiangsu Agricultural Sciences,2022,50(5):171.

备注/Memo

备注/Memo:
收稿日期:2020-12-01
基金项目:国家自然科学青年科学基金(编号:31902243)。
作者简介:马芳(1990—),女,山东莱芜人,博士,助理研究员,主要从事链球菌致病机制和免疫增强剂方面研究。E-mail:20180042@jaas.ac.cn。
通信作者:邓碧华,硕士,副研究员,主要从事疫苗佐剂方面研究。E-mail:dengbihua2000@163.com。
更新日期/Last Update: 2021-03-05