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首页> 外文期刊>Veterinary Microbiology >Association between virulence factors of Escherichia coli, Fusobacterium necrophorum, and Arcanobacterium pyogenes and uterine diseases of dairy cows
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Association between virulence factors of Escherichia coli, Fusobacterium necrophorum, and Arcanobacterium pyogenes and uterine diseases of dairy cows

机译：大肠杆菌，坏死镰刀菌和化脓性弧菌的致病因子与奶牛子宫疾病之间的关系

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The objective of this study was to evaluate the relationship between bacterial species-specific virulence factors (VFs) present in the uterus at 3 different stages of lactation (1-3, 8-10, and 34-36 days in milk (DIM)) and the incidence of metritis and clinical endometritis in dairy cows. The following VF genes were investigated: plo (pyolysin), cbpA (collagen-binding protein), and fimA (fimbriae expression) which are Arcanobacterium pyogenes specific; fimH (a type 1 pilus component). Escherichia coil specific; and lktA (leukotoxin), Fusobacterium necrophorum specific. Uterine swabs were collected from 111 postpartum dairy cows. PCR was used to detect the presence of plo, cbpA, fimA, fimH, and lktA genes. A. pyogenes cbpA was detected in only 5 samples and therefore was not subjected to further analysis. E. coil (fimH) was significantly associated with metritis and endometritis when detected at 1-3 DIM; F. necrophorum (lktA) was significantly associated with metritis when detected at 1-3 and 8-12 DIM and with endometritis when detected at 34-36 DIM; and A. pyogenes (fimA and plo) was associated with metritis (fimA) when detected at 1-3 DIM and endometritis (fimA and plo) when detected at 8-10 and 34-36 DIM. (C) 2011 Elsevier B.V
机译：这项研究的目的是评估在哺乳的三个不同阶段（牛奶（DIM）的1-3、8-10和34-36天）在子宫中存在的细菌种特异性毒力因子（VF）之间的关系。奶牛子宫炎和子宫内膜炎的发生率。研究了以下VF基因：脓毒杆菌特异性的plo（溶血素），cbpA（胶原结合蛋白）和fimA（菌毛表达）。 fimH（1型菌毛成分）。大肠埃希氏菌特异性;和lktA（白细胞毒素），坏死镰刀菌特异。从111名产后奶牛采集子宫拭子。 PCR用于检测plo，cbpA，fimA，fimH和lktA基因的存在。化脓性链球菌cbpA仅在5个样品中检测到，因此未进行进一步分析。当在1-3 DIM检测时，大肠杆菌（fimH）与子宫炎和子宫内膜炎显着相关;当在1-3和8-12 DIM检测时，坏死镰刀菌（lktA）与子宫炎显着相关;在34-36 DIM检测时，与子宫内膜炎显着相关。化脓性链球菌（fimA和plo）在1-3 DIM检测时与子宫炎（fimA）相关，在8-10和34-36 DIM检测时与子宫内膜炎（fimA和plo）相关。 （C）2011 Elsevier B.V

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