Bovine babesiosis caused by Babesia species is an economically significant disease of cattle. Severe clinical babesiosis in cattle is caused by Babesia bovis, B. bigemina, and the recently discovered Babesia sp. Mymensingh. Mongolia is an agricultural country with a large cattle inventory. Although previous studies have detected active infections of B. bovis and B. bigemina in Mongolian cattle, only a few provinces were surveyed. Additionally, the endemicity of Babesia sp. Mymensingh in Mongolia remains unknown. We screened blood DNA samples from 725 cattle reared in 16 of the 21 Mongolian provinces using B. bovis-, B. bigemina-, and Babesia. sp. Mymensingh-specific PCR assays. The overall positive rates of B. bovis, B. bigemina, and Babesia sp. Mymensingh were 27.9% (n = 202), 23.6% (n = 171), and 5.4% (n = 39), respectively. B. bovis and B. bigemina were detected in cattle in all surveyed provinces; whereas Babesia sp. Mymensingh was detected in 11 of the 16 surveyed provinces. On a per province basis, the B. bovis- B. bigemina-, and Babesia sp. Mymensingh-positive rates were 5.9–52.0%, 9.1–76.3%, and 0–35.7%, respectively. In conclusion, this is the first report of Babesia sp. Mymensingh in Mongolia. In addition, we found that species of Babesia that are capable of causing bovine clinical babesiosis, including B. bovis, B. bigemina, and Babesia sp. Mymensingh, are widespread throughout the country.

由巴贝斯虫种引起的牛巴贝病是一种经济上重要的牛病。在牛严重的临床巴贝斯虫病引起巴贝斯虫牛，B. bigemina，以及最近发现的巴贝斯虫属。Mymensingh。蒙古是一个农业国，拥有大量的牛。尽管先前的研究已经发现了B的活跃感染。牛和乙。在蒙古牛中的bigemina，仅调查了少数几个省。此外，巴贝斯虫的流行。蒙古的Mymensingh仍然未知。我们使用以下方法从21个蒙古省的16个省中饲养的725头牛中筛选了血液DNA样本乙。牛- ，乙。bigemina-和巴贝斯虫。sp。Mymensingh特异性PCR分析。B的总体阳性率。牛，乙。bigemina和巴贝斯虫sp。Mymensingh分别为27.9％（n  = 202），23.6％（n  = 171）和5.4％（n  = 39）。乙。牛和乙。在所有接受调查的省份的牛中均检测到双歧杆菌；而巴贝斯sp。在被调查的16个省中的11个省中检测到Mymensingh。在每个省份中，B。牛-乙。bigemina-和Babesia sp。Mymensingh阳性率分别为5.9–52.0％，9.1–76.3％和0–35.7％。总之，这是巴贝斯虫的首次报道。蒙古的Mymensingh。此外，我们发现的物种巴贝斯虫，它们能够引起牛巴贝斯虫病临床，包括乙。牛，乙。bigemina和巴贝斯虫sp。Mymensingh，遍布全国。