对厄瓜多尔两个奶牛群进行新孢子虫病、Q热和布鲁氏菌病血清学检测，以评估流产原因。
Serology for Neosporosis, Q fever and Brucellosis to assess the cause of abortion in two dairy cattle herds in Ecuador.
作者信息
Changoluisa Darwin, Rivera-Olivero Ismar A, Echeverria Gustavo, Garcia-Bereguiain Miguel Angel, de Waard Jacobus H
机构信息
School of Biological Sciences and Engineering, Yachay Tech University, Urcuquí, Ecuador.
One Health Research Group, Facultad de Ciencias de la Salud, Universidad de las Américas, Quito, Ecuador.
出版信息
BMC Vet Res. 2019 Jun 11;15(1):194. doi: 10.1186/s12917-019-1924-7.
BACKGROUND
Determining the infectious cause of abortion in cattle is difficult. This case-control study was set up to investigate the infectious causes of abortion by determining the seroprevalence of three reproductive pathogens in dairy cattle in Ecuador and their association with abortion: Brucella abortus, Neospora caninum and Coxiella burnetii.
RESULTS
Ninety-five blood samples were obtained from cows that had experienced a mid- or late gestation abortion of their first calf and seventy-seven samples from a control group of cows with the same age that did not experience abortion problems. No antibodies were detected for B. abortus in any of the serum samples, but a high seroprevalence for both C. burnetii (52.9%) and N. caninum infection (21.5%) was found in group of cows. The seroprevalence of N. caninum infection in cattle that had experienced abortions was significantly higher (p < 0.05) than the seroprevalence in the control cows on one of the cattle farms, but no association between abortion and seropositivity for C. burnetii was found.
CONCLUSION
We conclude that Neosporosis plays an important role in the epidemiology of abortion on one cattle farm, but that Q fever is apparently not an important cause for abortion in this setting.
背景
确定牛流产的感染原因很困难。本病例对照研究旨在通过测定厄瓜多尔奶牛中三种生殖病原体的血清阳性率及其与流产的关联，来调查流产的感染原因：牛布鲁氏菌、犬新孢子虫和伯氏考克斯氏体。
结果
从经历首次妊娠中期或晚期流产的母牛身上采集了95份血样，从同龄未出现流产问题的对照组母牛身上采集了77份血样。在任何血清样本中均未检测到牛布鲁氏菌抗体，但在母牛组中发现伯氏考克斯氏体（52.9%）和犬新孢子虫感染（21.5%）的血清阳性率都很高。在其中一个奶牛场，经历过流产的母牛中犬新孢子虫感染的血清阳性率显著高于（p < 0.05）对照母牛的血清阳性率，但未发现流产与伯氏考克斯氏体血清阳性之间存在关联。
结论
我们得出结论，新孢子虫病在一个奶牛场的流产流行病学中起重要作用，但在这种情况下，Q热显然不是流产的重要原因。
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