Chlamydiosis is caused by an obligate intracellular gram-negative bacterium of the genus Chlamydophila which is a zoonotic pathogen. The objectives of the study were to identify the seroprevalence of antibodies against Chlamydophila abortus in dromedary camel herds from four districts in eastern Algeria, as well as to estimate the association between seroprevalence and certain factors present at the animal and herd levels. Blood samples were collected from a random sample of animals within each of 82 camel herds. Serum samples were subjected to a C. abortus ELISA test, and association between the presence of antibodies and potential risk factors was estimated. Animal and herd seroprevalence were 2.5 % and 15.8 %, respectively, indicating substantial exposure of camels to C. abortus in the four districts studied. Age, breed, and sex did not influence seroprevalence in tested animals. Based on the univariate analysis, contact with sheep and goats, contact with other camel herds, and histories of abortion were major risk factors for infection. By using multivariate analysis, contact of camels with sheep and goats and with others camel herds, through shared grazing or watering points, were important factors for transmission of chlamydiosis with an odds ratio of 3.3 and 9.4, respectively. At the herd level the introduction of purchased animals was the major risk factor. This baseline information will be highly useful for launching C. abortus control programs in the region and potentially elsewhere.

衣原体病是由属的专性细胞内革兰氏阴性细菌引起衣原体其是人畜共患病原体。这项研究的目的是确定阿尔及利亚东部四个地区单峰骆驼群中抗流产衣原体抗体的血清学阳性率，并评估血清学阳性率与动物和畜群水平上某些因素之间的相关性。从82个骆驼群中的每一个动物的随机样本中采集血液样本。血清样品接受流产弯曲杆菌进行了ELISA测试，以及抗体的存在与潜在危险因素之间的关联。动物和畜群的血清阳性率分别为2.5％和15.8％，表明骆驼大量暴露于流产梭状芽胞杆菌在四个地区进行了研究。年龄，品种和性别均不影响被测动物的血清阳性率。根据单因素分析，与绵羊和山羊的接触，与其他骆驼群的接触以及流产的历史是感染的主要危险因素。通过多变量分析，骆驼与绵羊和山羊以及其他骆驼群通过共同的放牧或饮水点接触，是衣原体传播的重要因素，比值比分别为3.3和9.4。在畜群一级，引进购买的动物是主要的危险因素。该基线信息对于在该地区甚至其他地方启动流产梭状芽胞杆菌控制程序非常有用。