Rønsholt L
Acta Pathol Microbiol Scand B. 1978 Oct;86B(5):291-7. doi: 10.1111/j.1699-0463.1978.tb00046.x.
Intestinal tract infection by Chlamydia psittaci was demonstrated in one cattle herd by isolation from faecal specimens, using embryonated eggs. Such infections were observed in all animals younger than 12 months, in 60% of the heifers and in none of the adult cows. The presence of infection correlated (r=0.511) with the serum titre of compliment fixation antibodies against chlamydial antigen. Young calves, which were spontaneously infected with Chlamydia postnatally, developed ileitis and moderate interstitial pneumonia. The results of histological sections and isolation of the agent from tissue specimens indicated Chlamydia to be the cause of these conditions. The strain isolated (ROS DK/KVL 6/B3) was identified as C. psittaci. The morphology of the organism and it's pathogenicity in guinea-pigs were studied. In embryonated eggs, a dose-response curve was demonstrated for the ROS strain, which differed in that respect from another member of this species tested, viz. EBA (59-795).
通过使用鸡胚从粪便样本中分离出病原体，证实了一个牛群中存在鹦鹉热衣原体肠道感染。在所有12个月以下的动物、60%的小母牛中观察到此类感染，而成年母牛中未观察到感染。感染的存在与针对衣原体抗原的补体结合抗体的血清滴度相关（r=0.511）。出生后自然感染衣原体的幼小牛犊出现了回肠炎和中度间质性肺炎。组织切片结果和从组织样本中分离病原体表明，衣原体是这些病症的病因。分离出的菌株（ROS DK/KVL 6/B3）被鉴定为鹦鹉热衣原体。研究了该生物体的形态及其在豚鼠中的致病性。在鸡胚中，证实了ROS菌株的剂量反应曲线，该曲线在这方面与测试的该物种的另一个成员即EBA（59-795）不同。
