National Anima Health Diagnostic and Investigation Center (NAHDIC), P. O. Box 04, Sebeta, Ethiopia.
Collage of Agriculture and Veterinary Medicine, Addis Ababa University, P. O. Box, 34, Bishoftu, Ethiopia.
BMC Vet Res. 2020 May 20;16(1):145. doi: 10.1186/s12917-020-02360-0.
Abortion is considered an important disease problem of small ruminants in Borana pastoral area. A cross-sectional study was conducted to estimate the prevalence and risk factors of chlamydiosis, coxiellosis (Q-fever) and brucellosis in small ruminants in selected districts of Borana zone.
A total of 506 sheep and goats were tested using serological tests. Fifty (9.88%; 95% CI: 7.42, 12.82), 144 (28.46%; 95% CI: 24.56, 32.61) and none (0.00%; 95% CI: 0.00, 0.59) of them were positive for chlamydiosis, coxiellosis and brucellosis, respectively. History of abortion was recorded in 136 (32.00%; CI: 27.59, 36.67) of sheep and goats in the study area. The logistic regression analysis, however, showed that statistically significant difference ccurred among districts and between the species of small ruminants. The prevalence odd of antibodies against C. abortus was significantly lower in Miyo, Dire and Teltelle districts compared to Dillo. The odd of infection with this bacterium was lower in sheep than goats. Similarly the odd of infection with C. burnettii was significantly higher in Dillo district than the rest of the districts studied, higher in goats than sheep and higher in adult animals than young ones.
High prevalence of abortion is observed in sheep and goats in the study area. High seropositivity of C. burnetii and C. abortus in both sheep and goats tested implies risks of human infection by both diseases. Thus, attention needs to be paid to further study of both diseases in animals and humans in the area.
在博拉纳牧区，流产被认为是小反刍动物的重要疾病问题。本研究采用横断面研究方法，旨在评估博拉纳地区选定地区小反刍动物中衣原体病、柯克斯氏体病（Q 热）和布鲁氏菌病的流行率和危险因素。
共使用血清学试验检测了 506 只绵羊和山羊。其中，50 只（9.88%；95%CI：7.42，12.82）、144 只（28.46%；95%CI：24.56，32.61）和 0 只（0.00%；95%CI：0.00，0.59）的绵羊和山羊分别对衣原体病、柯克斯氏体病和布鲁氏菌病呈阳性。在研究地区的绵羊和山羊中，有 136 只（32.00%；CI：27.59，36.67）有流产史。然而，逻辑回归分析显示，各地区之间以及小反刍动物的种间存在统计学显著差异。与迪洛相比，米约、迪雷和特尔泰尔地区感染 C. abortus 的抗体阳性率显著较低。绵羊感染该细菌的几率低于山羊。同样，与研究的其他地区相比，迪洛地区感染 C. burnettii 的几率更高，山羊高于绵羊，成年动物高于幼年动物。
研究地区的绵羊和山羊流产率较高。检测到的绵羊和山羊 C. burnetii 和 C. abortus 的高血清阳性率意味着这两种疾病都可能感染人类。因此，需要关注该地区动物和人类对这两种疾病的进一步研究。
