Brooks B W, Barnum D A
Can J Comp Med. 1984 Apr;48(2):146-50.
Twenty bovine udder quarters colonized with Corynebacterium bovis SR6 and 20 uncolonized quarters were challenged by inoculation of Staphylococcus aureus Newbould 305 (ATCC 29740) into the teat cistern. The percentage of infection in quarters colonized with C. bovis (50%) was significantly lower than that in controls (100%). By similar challenge no significant difference was observed between the percentage of infection with Streptococcus agalactiae ATCC 27956 in 33 quarters colonized with C. bovis (70%) compared to 33 controls (87.9%). A total of 37 quarters colonized with C. bovis and 37 control quarters were challenged with Staph. aureus Newbould 305 (ATCC 29740) and Maxi (ATCC 27543) and Strep. agalactiae (ATCC 27956) by exposure of the teat orifice. The percentage of teat ducts colonized with C. bovis which became infected with either pathogen was not different from that for controls.
将金黄色葡萄球菌纽博尔德305株（ATCC 29740）接种到20个被牛棒状杆菌SR6定植的牛乳房象限和20个未被定植的象限中进行挑战。被牛棒状杆菌定植的象限的感染率（50%）显著低于对照组（100%）。通过类似的挑战，在33个被牛棒状杆菌定植的象限中无乳链球菌ATCC 27956的感染率（70%）与33个对照组（87.9%）相比，未观察到显著差异。通过乳头开口暴露，用金黄色葡萄球菌纽博尔德305株（ATCC 29740）、马克西株（ATCC 27543）和无乳链球菌（ATCC 27956）对总共37个被牛棒状杆菌定植的象限和37个对照象限进行挑战。被牛棒状杆菌定植且被任一种病原体感染的乳腺导管比例与对照组无差异。
