Bovine babesiosis represents a serious threat to the cattle industry in the tropics and subtropics. Although several Babesia species infect cattle, only B. bovis, B. bigemina and B. divergens are known to cause clinical babesiosis. However, our recent study demonstrated that the newly discovered Babesia sp. Mymensingh might be a virulent species capable of causing clinical babesiosis in cattle. The objective of this study was to determine the host range and geographical distribution of Babesia sp. Mymensingh on a global scale. A total of 2,860 archived DNA samples from 2,263 cattle in Sri Lanka (n = 672), the Philippines (n = 408), Vietnam (n = 460), Uganda (n = 409), Brazil (n = 164) and Argentina (n = 150); 419 buffalo in Sri Lanka (n = 327) and Vietnam (n = 92); and 127 goats and 51 sheep in Vietnam were screened using a Babesia sp. Mymensingh‐specific PCR assay. Babesia sp. Mymensingh infection was detected in cattle, buffalo, sheep and goats. Cattle of all countries surveyed in this study except Brazil were found to be infected with Babesia sp. Mymensingh. The highest positive rates were recorded in cattle from the Philippines (11.3%) and Vietnam (9.6%), followed by Argentina (4.7%), Sri Lanka (1.5%) and Uganda (1.0%). Buffalo were found to be infected with this parasite in Sri Lanka (1.2%) and Vietnam (10.9%). Unexpectedly, Babesia sp. Mymensingh was also detected in sheep (2.0%) and goats (1.3%) from Vietnam. These findings were confirmed by PCR amplicon sequencing. In conclusion, our present findings indicate that Babesia sp. Mymensingh, which infects cattle, buffalo, sheep and goats, is endemic in Asia, Africa and South America.

中文翻译：

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巴贝虫的寄主范围和地理分布。迈门辛

牛巴贝西虫病对热带和亚热带养牛业构成严重威胁。尽管有几种巴贝虫感染牛，但只有巴贝虫感染。牛维斯，B . 已知双联双歧杆菌和分歧双歧杆菌可引起临床巴贝西虫病。然而，我们最近的研究表明，新发现的巴贝虫属sp。迈门辛可能是一种剧毒物种，能够引起牛临床巴贝西虫病。本研究的目的是确定巴贝虫属的寄主范围和地理分布。迈门辛在全球范围内。总共 2,860 个存档的 DNA 样本来自斯里兰卡 ( n  = 672)、菲律宾 ( n  = 408)、越南 ( n = 460  )、乌干达 ( n  = 409)、巴西 ( n  = 164) 和阿根廷 (n = 164) 的 2,263 头牛n  = 150); 斯里兰卡 ( n  = 327) 和越南 ( n  = 92) 419 头水牛；使用巴贝虫属对越南的 127 只山羊和 51 只绵羊进行了筛查。Mymensingh 特异性 PCR 检测。巴贝斯虫属 在牛、水牛、绵羊和山羊中发现了迈门辛感染。除巴西外，本研究调查的所有国家的牛均被发现感染巴贝虫。迈门辛。菲律宾（11.3%）和越南（9.6%）的牛的阳性率最高，其次是阿根廷（4.7%）、斯里兰卡（1.5%）和乌干达（1.0%）。斯里兰卡（1.2%）和越南（10.9%）的水牛被发现感染这种寄生虫。出乎意料的是，巴贝斯虫。来自越南的绵羊 (2.0%) 和山羊 (1.3%) 中也检测到了 Mymensingh。这些发现通过 PCR 扩增子测序得到了证实。总之，我们目前的研究结果表明巴贝虫属sp。迈门辛病毒感染牛、水牛、绵羊和山羊，在亚洲、非洲和南美洲流行。