Rønsholt L U, Basse A
Acta Vet Scand. 1981;22(1):9-22. doi: 10.1186/BF03547201.
Cattle are frequently infected with a persisting intestinal Chlamydia psittaci strain, which through the manure deposit will contaminate their surroundings. The potential of such a strain (ROS) for inducing mastitis was demonstrated in 7 cows, inoculated in 1 udder-quarter through the teat canal, and the pathogenetic events provoked were compared with those of more virulent and infrequently isolated strains, viz. the EAE and the SBE strains. The chlamydial agent caused during a 2–3 weeks period a local, self-limiting exudative mastitis with a fibrinous secretion, leading to a state of reduced milk production. Increasing titres of complement fixing and agglutinating antibodies were demonstrated in whey and serum. The results from the 2 serological methods did not substitute each other entirely, so that both tests had to be employed in order to demonstrate the presence of the agent in all cases. Demonstration in 1 animal showed that the infection left the gland with resistance to reinfection.
牛经常感染一种持续存在的肠道鹦鹉热衣原体菌株，该菌株会通过粪便污染其周围环境。在7头奶牛中，通过乳头管向1个乳腺象限接种了这种菌株（ROS），以证明其诱发乳腺炎的可能性，并将引发的致病过程与毒性更强、分离频率较低的菌株（即EAE和SBE菌株）的致病过程进行比较。衣原体病原体在2至3周内引起局部、自限性渗出性乳腺炎，并伴有纤维蛋白性分泌物，导致产奶量下降。在乳清和血清中检测到补体结合抗体和凝集抗体的滴度不断升高。两种血清学方法的结果并不完全相互替代，因此在所有情况下都必须同时采用这两种检测方法才能证明病原体的存在。在1只动物身上的检测表明，感染使腺体产生了对再次感染的抵抗力。
